Course Descriptions

Center for Training and Transportation Professionals

Course Name When Offered

The Basic Aggregates Testing Technician course is a mandatory pre-requisite course to each of the following technician training/certification courses:  Concrete Field Testing Technician, Hot Mix Asphalt Testing Technician, Soils Testing Technician, and Concrete Strength Testing Technician.  Those seeking certification in more than one area may take Basic Aggregates immediately prior to another course.

This course covers sampling and testing of aggregates used in gradework, base courses, portland cement concrete and hot-mix asphalt, with particular emphasis on gradation and specific gravity determinations.  The procedures covered are those prescribed by the Arkansas Department of Transportation (ARDOT) Standard Specifications for Highway Construction, to include the following:

  • AASHTO T 2 Sampling of Aggregates
  • AASHTO T 11 Materials Finer that 75-mm (No. 200) Sieve in Mineral Aggregates by Washing
  • AASHTO T 21 Organic Impurities in Fine Aggregate for Concrete
  • AASHTO T 27 Sieve Analysis of Fine and Coarse Aggregates
  • AASHTO T 84 Specific Gravity and Absorption of Fine Aggregate
  • AASHTO T 85 Specific Gravity and Absorption of Coarse Aggregate
  • AASHTO T 255 Total Evaporable Moisture Content of Aggregate by Drying
  • AASHTO R 76 Reducing Field Samples of Aggregate to Testing Size
  • ARDOT 35 Method of Sampling Stone, Gravel and Sand for use as Highway Materials
  • ARDOT 302 Deleterious Matter in Aggregate
  • ARDOT 304 Crushed Particles in Aggregate
  • ARDOT 348 Moisture Content of Soils or Aggregates
  • ARDOT 465 Procedure for Sampling by Random Number Table 

This course is not intended to provide basic training, but rather to serve as a refresher and evaluation.  Prior to attending the course, participants should have a working knowledge of the testing of aggregates in the laboratory and field, and the mathematical calculations associated with those methods.  Experience in laboratory testing methods is strongly recommended.

There are no pre-requisite courses for the Basic Aggregates Testing Technician course.

The ACI Aggregate Testing Technician Certification is also available in conjunction with (or in lieu of) the Basic Aggregates course.  Those interested in obtaining this nationally-recognized certification must notify CTTP at least two weeks prior to the Basic Aggregates course date to allow for shipment of testing materials.  Based on availability and shipping times, requests received on short notice may be denied.  Please note that holding the ACI Aggregate Testing Technician Certification does not result in automatic or reciprocal CTTP certification in Basic Aggregates.

Two CTTP classes, Concrete Field Testing Technician and Concrete Strength Testing Technician, are tested with exams furnished by the American Concrete Institute (ACI).  Students may take either of the courses without the Basic Aggregates pre-requisite and will receive the ACI certification. No CTTP certification for these courses will be received until completion of the Basic Aggregates course.

All necessary equipment and supplies used in the Basic Aggregates Testing Technician course will be furnished by CTTP. A course notebook and pencil is provided to each participant.  Calculators may be borrowed from CTTP; however, students are often more comfortable bringing a calculator with which they are familiar, and routinely use.  Other items that may be useful include a straightedge or ruler, pen, pencil, and highlighter.

CTTP course participants are required to wear applicable personal protective equipment in the laboratory, including long pants, closed-toe shoes, and safety glasses.  Safety glasses, gloves, and other personal protective equipment may be borrowed from CTTP during the class.

Each Basic Aggregates course will begin at 8:30 am on Day 1 unless otherwise stated, with check-in and registration from 8:00 am to 8:30 am.  Classroom and laboratory instruction will be provided on Day 1 and Day 2.  Written and performance exams will be given on Day 3, with the course concluding at approximately noon on Day 3.  Detailed Course Schedule

The Basic Aggregates certification requires a passing score on both a written and a performance exam.  The written exam is closed-book, and covers the material presented in class.  There is a two-hour time limit for the written exam, and a minimum score of 70% is required to pass.  The Basic Aggregates performance exam consists of six stations, including:

  • AASHTO R 76: Reducing Samples of Aggregate to Testing Size
  • AASHTO T 21: Organic Impurities in Fine Aggregates for Concrete
  • AASHTO T 27: Sieve Analysis of Fine and Coarse Aggregates
  • AAHSTO T 84: Specific Gravity and Absorption of Fine Aggregate
  • AASHTO T 85: Specific Gravity and Absorption of Coarse Aggregate
  • AASHTO T 11: Materials Finer that 75-mm (No. 200) Sieve in Mineral Aggregates by Washing

Performance exams must be performed individually, and are graded on a “pass/fail” basis.  Participants must perform all methods correctly in order to pass the performance portion of the course.  Two attempts are allowed at each station.

Upon successful completion of both the written and performance exams, participants will receive a five-year CTTP certification in Basic Aggregates.  Certified individuals will receive a CTTP certificate and pocket card, and will be added to the CTTP website list of  Certified Technicians.  Expiration dates occur on a semi-annual basis, and will be either Jun 30 or December 31 after the five-year certification period.

Technicians are only required to successfully complete the standard 2 ½ day course once.  Re-certification in Basic Aggregates may be performed online.  For online re-certification, a series of review modules must be completed, followed by a Final Quiz.  A minimum score of 80% must be achieved on the Final Quiz.  The online re-certification process requires each technician have a unique email address, username, and password, and technicians must be logged in to successfully complete the re-certification process.

Participants who do not pass the Basic Aggregates Testing Technician course by failure of either the written or performance exam will be required to repeat the entire course.

ARDOT personnel must register for CTTP courses by contacting Ms. Dorothy Rhodes at
(501) 569-2072, or at

Contractors and other non-ARDOT personnel may register for a CTTP course by completing an online registration, or by filling out a registration form and mailing or faxing it to CTTP.  Online registration is preferred, but the registration form may also be printed from the website and submitted to CTTP by fax at (479) 575-7639.  Registration forms may also be obtained by calling the CTTP offices at (479) 575-3997.  Course Fees will apply.

The Concrete Field Testing Technician course covers the sampling and testing of fresh concrete, and follows the format of the American Concrete Institute (ACI) certification for Concrete Field Testing Technician Grade 1.  It also includes the testing procedures for fresh concrete prescribed by the Arkansas Department of Transportation (ARDOT) Standard Specifications for Highway Construction, including the following:

  • ASTM C172 (AASHTO R60) Standard Practice for Sampling Freshly Mixed Concrete
  • ASTM C31 (AASHTO T 23) Standard Practice for Making and Curing Concrete Test Specimens in the Field
  • ASTM C138 (AASHTO T 121) Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete
  • ASTM C143 (AASHTO T 119) Standard Test Method for Slump of Hydraulic-Cement Concrete
  • ASTM C173 (AASHTO T 196) Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method
  • ASTM C231 (AASHTO T 152) Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
  • ASTM C1064 Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete
  • ARDOT 52 Sampling Fresh Concrete

The Basic Aggregates Testing Technician course is a required pre-requisite for the Concrete Field Testing Technician course.  This course is not intended to provide basic training, but rather to serve as a refresher and evaluation leading to certification.  Prior to attending the course, participants should have a working knowledge of fresh concrete testing methods, as well as the mathematical calculations associated with those methods.  Experience in physically performing these test methods is strongly recommended.

The Basic Aggregates Testing Technician course is a required pre-requisite for the Concrete Field Testing Technician course.

All necessary equipment and supplies used in the Concrete Field Testing Technician course will be furnished by CTTP.  A course notebook and pencil is provided to each participant.  Calculators may be borrowed from CTTP; however, students are often more comfortable bringing a calculator with which they are familiar, and routinely use.  Other items that may be useful include a straightedge or ruler, pen, pencil, and highlighter.

CTTP course participants are required to wear applicable personal protective equipment in the laboratory, including long pants, closed-toe shoes, and safety glasses.  Safety glasses, gloves, and other personal protective equipment may be borrowed from CTTP during the class.

Each Concrete Field Testing course will begin at 1:00 pm on Day 1 unless otherwise stated, with check-in and registration from 12:30 pm to 1:00 pm.  Classroom and laboratory instruction will be provided on Day 1 and Day 2.  Written and performance exams will be given on Day 3, with the course concluding no later than 4:00 pm on Day 3.  Detailed Course Schedule

The Concrete Field Testing Technician certification requires each participant to pass both a written and a performance exam published by the American Concrete Institute.  The written exam is closed-book, and subject to a one-hour time limit.  In order to receive certification, 70% of all questions must be answered correctly on the entire written portion of the exam, and at least 60% of the questions must be answered correctly within each section of the written exam.  Also, a passing score must be achieved on each section of the performance exam.  Each component of the performance exam will be given at a test station, where individual course participants will be observed by test proctors.  The performance exams will be graded on a “pass / fail” basis, such that each participant will have two opportunities to achieve a passing grade.  All testing requirements are subject to the regulations of the American Concrete Institute.  The Concrete Field Testing performance exam consists of seven stations, including:

  • ASTM C31: Standard Practice for Making and Curing Concrete Test Specimens in the Field
  • ASTM C138: Standard Test Method for Density, Yield, and Air Content of Concrete
  • ASTM C143: Standard Test Method for Slump of Hydraulic-Cement Concrete
  • ASTM C172: Standard Practice for Sampling Freshly Mixed Concrete
  • ASTM C173: Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method
  • ASTM C231: Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
  • ASTM C1064: Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete

Upon successful completion of both the written and performance exams, participants will receive a five-year certification in Concrete Field Testing from CTTP, as well as a five-year certification from the American Concrete Institute.  Certified individuals will receive a CTTP certificate and pocket card, and will be added to the CTTP website list of Certified Technicians.  Expiration dates will be determined according to ACI policy.

CTTP will grant reciprocal certification in Concrete Field Testing if a technician currently holds the Concrete Field Testing Technician – Grade 1 certification from the American Concrete Institute.  However, the Basic Aggregates pre-requisite requirement must also be met.  The CTTP card and certificate will be granted only after the successful completion of the Basic Aggregates course, and proof of ACI certification is provided to CTTP. 

Re-certification in Concrete Field Testing may be achieved by either:

  1. Successful completion of the standard 2 ½ day Concrete Field Testing Technician course, or
  2. Successful completion of the Concrete Field Testing Technician – Test Only Option.

All policies pertaining to each of these options will apply.

Participants who pass the performance exam but do not pass the written exam may re-take the written exam within one year of the date of the original attempt, as allowed by ACI policies.  Participants who pass the written exam but not the performance exam may re-take the entire performance exam within one year of the date of the original attempt, as allowed by ACI policies.  If the written and performance components are not successfully completed within one year of the original attempt, then both the written and performance exams must be repeated.  Note that for this certification, a student may re-test without attending the full course.  However, pass rates are higher for students who attend the entire class when re-testing.

ARDOT personnel must register for CTTP courses by contacting Ms. Dorothy Rhodes at
(501) 569-2072, or at

ARDOT participants will receive email confirmation directly from CTTP.

Contractors and other non-ARDOT personnel may register for a CTTP course by completing an online registration, or by filling out a registration form and mailing or faxing it to CTTP.  Online registration is preferred, but the registration form may also be printed from the website and submitted to CTTP by fax at (479) 575-7639.  Registration forms may also be obtained by calling the CTTP offices at (479) 575-3997.  Course Fees will apply.

The Concrete Field Testing Technician – Test Only Option course covers the same specifications and testing requirements as the Concrete Field Testing Technician course.  However, no instructor-led training course is offered prior to the written and performance examinations.  This option is beneficial to students who routinely perform fresh concrete testing and are familiar with the associated specifications.

In order to be eligible for CTTP Concrete Field Testing certification, technicians must meet the following pre-requisite requirements:

  • Technicians must hold a current certification in Basic Aggregates Testing Technician.
  • Technicians must have been previously certified in the ACI Concrete Field Testing Technician, or equivalent.
  • Technicians must successfully complete the Online Concrete Refresher Modules.  The Online Final quiz must be successfully completed at least one week prior to the testing date.  A minimum score of 70% must be achieved on individual section knowledge checks, as well as a passing score of at least 80 percent on the final quiz.

The following pre-requisite conditions are also recommended:

  • Technicians should feel confident that they can successfully complete both the written and performance exams.
  • The technician’s supervisor should agree that the technician is adequately prepared to successfully complete both the written and performance exams.
  • Technicians should have been consecutively certified for at least 10 years, with no exam failures during that time frame.
  • Technicians should spend adequate time studying and practicing before attending the testing session.

All necessary equipment and supplies used in the Concrete Field Testing Technician – Test Only Option will be furnished by CTTP.  A course notebook will be provided (by mail) to each participant at the time of registration.  Participants should bring this course notebook with them to the testing session, as replacement notebooks will not be provided.  Calculators may be borrowed from CTTP; however, students are often more comfortable bringing a calculator with which they are familiar, and routinely use.  Other items that may be useful include a straightedge or ruler, pen, pencil, and highlighter.

CTTP course participants are required to wear applicable personal protective equipment in the laboratory, including long pants, closed-toe shoes, and safety glasses.  Safety glasses, gloves, and other personal protective equipment may be borrowed from CTTP during the class.

Each Concrete Field Testing – Test Only Option course will begin at 10:00 am unless otherwise stated, with check-in from 9:30 am to 10:00 am.  Alternatively, Test Only sessions may be held in conjunction with a full Concrete Field Testing Technician course.  In this case, the course will begin at 8:00 am unless otherwise stated, with check-in from 7:30 am to 8:00 am.  No classroom or laboratory instruction will be provided.  Written and performance exams will be given, with the course concluding no later than 4:00 pm.

The Concrete Field Testing Technician certification requires each participant to pass both a written and a performance exam published by the American Concrete Institute.  The written exam is closed-book, and subject to a one-hour time limit.  In order to receive certification, 70% of all questions must be answered correctly on the entire written portion of the exam, and at least 60% of the questions must be answered correctly within each section of the written exam.  Also, a passing score must be achieved on each section of the performance exam.  Each component of the performance exam will be given at a test station, where individual course participants will be observed by test proctors.  The performance exams will be graded on a “pass / fail” basis, such that each participant will have two opportunities to achieve a passing grade.  All testing requirements are subject to the regulations of the American Concrete Institute.  The Concrete Field Testing performance exam consists of seven stations, including:

  • ASTM C31: Standard Practice for Making and Curing Concrete Test Specimens in the Field
  • ASTM C138: Standard Test Method for Density, Yield, and Air Content of Concrete
  • ASTM C143: Standard Test Method for Slump of Hydraulic-Cement Concrete
  • ASTM C172: Standard Practice for Sampling Freshly Mixed Concrete
  • ASTM C173: Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method
  • ASTM C231: Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
  • ASTM C1064: Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete

Upon successful completion of both the written and performance exams, participants will receive a five-year certification in Concrete Field Testing from CTTP, as well as a five-year certification from the American Concrete Institute.  Certified individuals will receive a CTTP certificate and pocket card, and will be added to the CTTP website list of Certified Technicians. Expiration dates will be determined according to ACI policy.

CTTP will grant reciprocal certification in Concrete Field Testing if a technician currently holds the Concrete Field Testing Technician – Grade 1 certification from the American Concrete Institute.  However, the Basic Aggregates pre-requisite requirement must also be met.  The CTTP card and certificate will be granted only after the successful completion of the Basic Aggregates course, and proof of ACI certification is provided to CTTP.  Technicians not meeting the CTTP pre-requisite requirements will only receive certification from ACI.

Re-certification in Concrete Field Testing may be achieved by either:

  1. Successful completion of the standard 2 ½ day Concrete Field Testing Technician course, or
  2. Successful completion of the Concrete Field Testing Technician – Test Only Option.

All policies pertaining to each of these options will apply.

Participants who pass the performance exam but do not pass the written exam may re-take the written exam within one year of the date of the original attempt, as allowed by ACI policies.  Participants who pass the written exam but not the performance exam may re-take the entire performance exam within one year of the date of the original attempt, as allowed by ACI policies.  If the written and performance components are not successfully completed within one year of the original attempt, then both the written and performance exams must be repeated.  Note that for this certification, a student may re-test without attending the full course. However, pass rates are higher for students who attend the entire class when re-testing.

ARDOT personnel must register for CTTP courses by contacting Ms. Dorothy Rhodes at
(501) 569-2072, or at

ARDOT participants will receive email confirmation directly from CTTP.

Contractors and other non-ARDOT personnel may register for a CTTP course by completing an online registration request.  Online registration is preferred, but the registration form may also be printed from the website and submitted to CTTP by fax at (479) 575-7639.  Registration forms may also be obtained by calling the CTTP offices at (479) 575-3997. Course Fees will apply.

The Hot Mix Asphalt Testing Technician course covers the sampling and testing of hot mix asphalt, to include volumetric analysis of compacted specimens, asphalt content, and in-place density.  The procedures covered are those prescribed by the Arkansas Department of Transportation (ARDOT) Standard Specifications for Highway Construction, including the following:

  • AASHTO T 166 Bulk Specific Gravity of Compacted Bituminous Mixtures Using Saturated Surface-Dry Specimens
  • AASHTO T 209 Theoretical Maximum Specific Gravity and Density of Hot Mix Asphalt (HMA)
  • AASHTO T 269 Percent Air Voids in Compacted Dense and Open Asphalt Mixtures
  • AASHTO T 287 Asphalt Binder Content of Asphalt Mixtures by the Nuclear Method
  • AASHTO T 308 Determining the Asphalt Binder Content of Hot Mix Asphalt (HMA) by the Ignition Oven Method
  • AASHTO T 312 Preparing and Determining the Density of Hot Mix Asphalt (HMA) Specimens by Means of the Superpave Gyratory Compactor
  • AASHTO T 329 Moisture Content of Hot Mix Asphalt (HMA) by Oven Method
  • AASHTO T 331 Bulk Specific Gravity and Density of Compacted Hot Mix Asphalt (HMA) Using Automatic Vacuum Sealing Method
  • AASHTO M 323 Standard Specification for Superpave Volumetric Mix Design
  • AASHTO R 30 Standard Practice for Mixture Conditioning of Hot-Mix Asphalt (HMA)
  • AASHTO R 35 Standard Practice for Superpave Volumetric Design for Hot-Mix Asphalt (HMA)
  • AASHTO R 47 Reducing Samples of Hot Mix Asphalt (HMA) to Testing Size
  • AASHTO R 66 Sampling Bituminous Paving Mixtures
  • ARDOT 449 Determination of Asphalt Content of Asphalt Mixtures by the Nuclear Method
  • ARDOT 449A Calibration of Asphalt Content Gauge Troxler 3241-C
  • ARDOT 455A Test Method for Water Sensitivity for Compacted Bituminous Mixtures
  • ARDOT 460 Test Method for Solvent Washing and Sieve Analysis of Asphalt Concrete
  • ARDOT 461 Test Method for In Place Density and Percent Compaction of Asphalt Concrete Hot Mix using a Nuclear Gauge
  • ARDOT 464 Procedure for the Determination of Voids in Mineral Aggregate (VMA) and Air Voids
  • ARDOT 465 Procedure for Sampling by Random Number Table
  • ASTM D2950 Standard Test for Density of Bituminous Concrete in Place by Nuclear Methods
  • ASTM D5361 Standard Practice for Sampling Compacted Bituminous Mixtures for Laboratory Testing

The Basic Aggregates Testing Technician course is a required pre-requisite for the Hot Mix Asphalt Testing Technician course.  This course is not intended to provide basic training, but rather to serve as a refresher and evaluation leading to certification.  Prior to attending the course, participants should have a working knowledge of hot mix asphalt testing methods, as well as the mathematical calculations associated with those methods.  Experience in physically performing these test methods is strongly recommended. 

The Basic Aggregates Testing Technician course is a required pre-requisite for the Hot Mix Asphalt Testing Technician course.

All necessary equipment and supplies used in the Hot Mix Asphalt Testing Technician course will be furnished by CTTP.  A course notebook and pencil is provided to each participant.  Calculators may be borrowed from CTTP; however, students are often more comfortable bringing a calculator with which they are familiar, and routinely use.  Other items that may be useful include a straightedge or ruler, pen, pencil, and highlighter.

CTTP course participants are required to wear applicable personal protective equipment in the laboratory, including long pants, closed-toe shoes, and safety glasses.  Safety glasses, gloves, and other personal protective equipment may be borrowed from CTTP during the class.

Each Hot Mix Asphalt Testing course will begin at 1:00 pm on Day 1 unless otherwise stated, with check-in and registration from 12:30 pm to 1:00 pm.  Classroom and laboratory instruction will be provided on Day 1 and Day 2.  Written and performance exams will be given on Day 3, with the course concluding no later than 4:00 pm on Day 3.  Detailed Course Schedule

The Hot Mix Asphalt Testing Technician certification requires each participant to pass both a written and a performance exam.  The written exam is closed-book, and subject to a two-hour time limit.  In order to receive certification, 70% of all questions must be answered correctly on the written portion of the exam.

Performance exams must be performed individually, and are graded on a “pass/fail” basis.  Participants must perform all methods correctly in order to pass the performance portion of the course.  Two attempts are allowed at each station. The Hot Mix Asphalt Testing performance exam consists of six stations, including:

  • AASHTO T 166: Bulk Specific Gravity of Compacted Hot Mix Asphalt (HMA) Using Saturated Surface-Dry Specimens
  • AASHTO T 209: Theoretical Maximum Specific Gravity and Density of Hot Mix Asphalt (HMA)
  • AASHTO T 308: Determining the Asphalt Binder Content of Hot Mix Asphalt (HMA) by the Ignition Method
  • AASHTO T 312: Preparing and Determining the Density of Hot Mix Asphalt (HMA) Specimens by Means of the Superpave Gyratory Compactor
  • ARDOT 449: Determination of Asphalt Content of Asphalt Mixtures by the Nuclear Method
  • ARDOT 461: Test Method for In-Place Density and Percent Compaction of Asphalt Concrete Hot Mix Using a Nuclear Gauge

Upon successful completion of both the written and performance exams, participants will receive a five-year certification in Hot Mix Asphalt Testing from CTTP.  Certified individuals will receive a CTTP certificate and pocket card, and will be added to the CTTP website list of Certified Technicians.  Expiration dates occur on a semi-annual basis, and will be either June 30 or December 31 after the five-year certification period.

Re-certification in Hot Mix Asphalt may be achieved by successful completion of the standard 2 ½ day Hot Mix Asphalt Testing Technician course.

Participants who do not pass the Hot Mix Asphalt Testing Technician course by failure of either the written or performance exam will be required to repeat the entire course.

ARDOT personnel must register for CTTP courses by contacting Ms. Dorothy Rhodes at
(501) 569-2072, or at

ARDOT participants will receive email confirmation directly from CTTP.

Contractors and other non-ARDOT personnel may register for a CTTP course by completing an online registration, or by filling out a registration form and mailing or faxing it to CTTP.  Online registration is preferred, but the registration form may also be printed from the website and submitted to CTTP by fax at (479) 575-7639.  Registration forms may also be obtained by calling the CTTP offices at (479) 575-3997.  Course Fees will apply.

The Soils Testing Technician course covers laboratory and field tests related to earthwork, with particular emphasis on soil classification, plasticity index, moisture-density relationships, and nuclear density.  The procedures covered are those prescribed by the Arkansas Department of Transportation (ARDOT) Standard Specifications for Highway Construction, including the following:

  • AASHTO T 89 Determining the Liquid Limit of Soils
  • AASHTO T 90 Determining the Plastic Limit and Plasticity Index of Soils
  • AASHTO T 99 Moisture-Density Relations of Soils Using a 2.5-kg (5.5-lb) Rammer and a 305-mm (12-in.) Drop
  • AASHTO T 180 Moisture-Density Relations of Soils Using 4.54kg(10lb.) Rammer and a 457mm(18in.) Drop
  • AASHTO T 217 Determination of Moisture in Soils by Means of a Calcium Carbide Gas Pressure Moisture Tester
  • AASHTO T 265 Laboratory Determination of Moisture Content of Soils
  • AASHTO T 310 In-Place Density and Moisture Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth)
  • AASHTO M 145 Classification of Soils and Soil-Aggregates Mixtures for Highway Construction Purposes
  • AASHTO M 146 Terms Relating to Subgrade, Soil-Aggregate, and Fill Materials
  • AASHTO R 58 Dry Preparation of Disturbed Soil and Soil Aggregate Samples for Test
  • AASHTO R 74 Wet Preparation of Disturbed Soil Samples for Test
  • ARDOT 30 Sampling Soils
  • ARDOT 347 Determining Moisture Content by Speedy Moisture Content Tester
  • ARDOT 348 Moisture Content of Soils or Aggregates

The Basic Aggregates Testing Technician course is a required pre-requisite for the Soils Testing Technician course.  This course is not intended to provide basic training, but rather to serve as a refresher and evaluation leading to certification.  Prior to attending the course, participants should have a working knowledge of soil testing methods, as well as the mathematical calculations associated with those methods.  Experience in physically performing these test methods is strongly recommended. 

The Basic Aggregates Testing Technician course is a required pre-requisite for the Soils Testing Technician course. 

All necessary equipment and supplies used in the Soils Testing Technician course will be furnished by CTTP.  A course notebook and pencil is provided to each participant.  Calculators may be borrowed from CTTP; however, students are often more comfortable bringing a calculator with which they are familiar, and routinely use.  Other items that may be useful include a straightedge or ruler, pen, pencil, and highlighter.

CTTP course participants are required to wear applicable personal protective equipment in the laboratory, including long pants, closed-toe shoes, and safety glasses.  Safety glasses, gloves, and other personal protective equipment may be borrowed from CTTP during the class.

Each Soils Testing course will begin at 1:00 pm on Day 1 unless otherwise stated, with check-in and registration from 12:30 pm to 1:00 pm.  Classroom and laboratory instruction will be provided on Day 1 and Day 2.  Written and performance exams will be given on Day 3, with the course concluding no later than 4:00 pm on Day 3.  Detailed Course Schedule

The Soils Testing Technician certification requires each participant to pass both a written and a performance exam.  The written exam is closed-book, and subject to a two-hour time limit.  In order to receive certification, 70% of all questions must be answered correctly on the written portion of the exam.

Performance exams must be performed individually, and are graded on a “pass/fail” basis.  Participants must perform all methods correctly in order to pass the performance portion of the course.  Two attempts are allowed at each station. The Soils Testing performance exam consists of three stations, including:

  • AASHTO T 89/90: Determining Liquid Limit of Soils and Determining the Plastic Limit and Plasticity Index of Soils
  • AASHTO T 99: Moisture-Density Relations of Soils Using a 2.5-kg (5.5-lb) Rammer and a 305-mm (12-in.) Drop
  • AASHTO T 310: In-Place Density and Moisture Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth)

Upon successful completion of both the written and performance exams, participants will receive a five-year certification in Soils Testing from CTTP.  Certified individuals will receive a CTTP certificate and pocket card, and will be added to the CTTP website list of Certified Technicians.  Expiration dates occur on a semi-annual basis, and will be either June 30 or December 31 after the five-year certification period.

Re-certification in Soils may be achieved by successful completion of the standard 2 ½ day Soils Testing Technician course.

Participants who do not pass the Soils Testing Technician course by failure of either the written or performance exam will be required to repeat the entire course.

ARDOT personnel must register for CTTP courses by contacting Ms. Dorothy Rhodes at
(501) 569-2072, or at

ARDOT participants will receive email confirmation directly from CTTP.

Contractors and other non-ARDOT personnel may register for a CTTP course by completing an online registration, or by filling out a registration form and mailing or faxing it to CTTP.  Online registration is preferred, but the registration form may also be printed from the website and submitted to CTTP by fax at (479) 575-7639.  Registration forms may also be obtained by calling the CTTP offices at (479) 575-3997.  Course Fees will apply.

The Concrete Strength Testing Technician course covers the testing of compressive and flexural strength of hardened concrete, and follows the format of the American Concrete Institute (ACI) certification for Concrete Strength Testing Technician.  It also includes the testing procedures for hardened concrete prescribed by the Arkansas Department of Transportation (ARDOT) Standard Specifications for Highway Construction, including the following:

  • ASTM C 617 (AASHTO T 231) Capping Cylindrical Concrete Specimens
  • ASTM C 1231 Use of Unbonded Caps in Determination of Compressive Strength of Hardened Concrete Cylinders
  • ASTM C 39 (AASHTO T 22) Compressive Strength of Cylindrical Concrete Specimens
  • ASTM C 78 (AASHTO T 97) Flexural Strength of Concrete 

The Basic Aggregates Testing Technician course is a required pre-requisite for the Concrete Strength Testing Technician course.  This course is not intended to provide basic training, but rather to serve as a refresher and evaluation leading to certification.  Prior to attending the course, participants should have a working knowledge of hardened concrete testing methods, as well as the mathematical calculations associated with those methods.  Experience in physically performing these test methods is strongly recommended.

The Basic Aggregates Testing Technician course is a required pre-requisite for the Concrete Strength Testing Technician course.

All necessary equipment and supplies used in the Concrete Strength Testing Technician course will be furnished by CTTP.  A course notebook and pencil is provided to each participant.  Calculators may be borrowed from CTTP; however, students are often more comfortable bringing a calculator with which they are familiar, and routinely use.  Other items that may be useful include a straightedge or ruler, pen, pencil, and highlighter.

CTTP course participants are required to wear applicable personal protective equipment in the laboratory, including long pants, closed-toe shoes, and safety glasses.  Safety glasses, gloves, and other personal protective equipment may be borrowed from CTTP during the class.

Each Concrete Strength Testing course will begin at 1:00 pm on Day 1 unless otherwise stated, with check-in and registration from 12:30 pm to 1:00 pm.  Classroom and laboratory instruction will be provided on Day 1 and Day 2.  Written and performance exams will be given on Day 3, with the course concluding no later than 2:00 pm on Day 3.  Detailed Course Schedule

The Concrete Strength Testing Technician certification requires each participant to pass both a written and a performance exam published by the American Concrete Institute.  The written exam is closed-book, and subject to a one-hour time limit.  In order to receive certification, 70% of all questions must be answered correctly on the entire written portion of the exam, and at least 60% of the questions must be answered correctly within each section of the written exam.  Also, a passing score must be achieved on each section of the performance exam.  Each component of the performance exam will be given at a test station, where individual course participants will be observed by test proctors.  The performance exams will be graded on a “pass / fail” basis, such that each participant will have two opportunities to achieve a passing grade.  All testing requirements are subject to the regulations of the American Concrete Institute. The Concrete Strength Testing performance exam consists of three stations, including:

  • ASTM C617: Capping Cylindrical Concrete Specimens
  • ASTM C39: Compressive Strength of Cylindrical Concrete Specimens
  • ASTM C78: Flexural Strength of Concrete

Upon successful completion of both the written and performance exams, participants will receive a five-year certification in Concrete Strength Testing from CTTP.  Certified individuals will receive a CTTP certificate and pocket card, and will be added to the CTTP website list of Certified Technicians.  Expiration dates will be determined according to ACI policy.

CTTP will grant reciprocal certification in Concrete Strength Testing if a technician currently holds the Concrete Strength Testing Technician certification from the American Concrete Institute.  However, the Basic Aggregates pre-requisite requirement must also be met.  The CTTP card and certificate will be granted only after the successful completion of the Basic Aggregates course, and proof of ACI certification is provided to CTTP.

Re-certification in Concrete Strength may be achieved by successful completion of the standard 2 ½ day Concrete Strength Testing Technician course.

Participants who pass the performance exam but do not pass the written exam may re-take the written exam within one year of the date of the original attempt, as allowed by ACI policies. Participants who pass the written exam but not the performance exam may re-take the entire performance exam within one year of the date of the original attempt, as allowed by ACI policies.  If the written and performance components are not successfully completed within one year of the original attempt, then both the written and performance exams must be repeated.  Note that for this certification, a student may re-test without attending the full course.  However, pass rates are higher for students who attend the entire class when re-testing.

ARDOT personnel must register for CTTP courses by contacting Ms. Dorothy Rhodes at
(501) 569-2072, or at

ARDOT participants will receive email confirmation directly from CTTP.

Contractors and other non-ARDOT personnel may register for a CTTP course by completing an online registration, or by filling out a registration form and mailing or faxing it to CTTP.  Online registration is preferred, but the registration form may also be printed from the website and submitted to CTTP by fax at (479) 575-7639.  Registration forms may also be obtained by calling the CTTP offices at (479) 575-3997.  Course Fees will apply.

This course covers topics pertaining to erosion and sediment control, including laws and regulations, best management practices, design, and inspection.  The procedures covered are those prescribed by the Arkansas Department of Transportation (ARDOT) Standard Specifications for Highway Construction, the current NPDES general construction permit as designated by the Arkansas Department of Environmental Quality (ADEQ), and the most recent revision of the ARDOT Erosion and Sediment Control Design and Construction Manual.  During the exam, students will be responsible for the following topics:

  • Basic concepts involving erosion and sedimentation
  • Basic knowledge of the ADEQ general construction permit
  • Requirements for acquiring coverage under the general ADEQ permit
  • Components of the Storm Water Pollution Prevention Plan (SWPPP)
  • Temporary erosion and sediment control measures
  • Permanent erosion and sediment control measures
  • Appropriate uses for Best Management Practices (BMPs)
  • Maintenance of BMPs

This course is not intended to provide basic training, but rather to serve as a refresher and evaluation.  Prior to attending the course, participants should have a working knowledge of the concepts relating to erosion and sediment control.  Field inspection or other similar experience is strongly recommended. Prior to attending the course, participants should have a working knowledge of construction practices associated with erosion and sediment control (ES&C), including:

  • The SWPPP documents
  • Seeding and mulching
  • Tracking
  • Silt fence
  • Ditch checks
  • Diversion ditches
  • Stream protection
  • Basic installation and maintenance procedures
  • Inspection documentation

No pre-requisite courses are required for the NPDES course.

All necessary equipment and supplies used in the NPDES course will be furnished by CTTP. A course notebook and pencil is provided to each participant.  Calculators may be borrowed from CTTP; however, students are often more comfortable bringing a calculator with which they are familiar, and routinely use.  Other items that may be useful include a straightedge or ruler, pen, pencil, and highlighter.

The NPDES course does not contain a laboratory component.  Thus, CTTP course participants are required to dress in a professional manner appropriate for the classroom setting, including long pants and closed-toe shoes.

Each NPDES course will begin at 8:30 am on Day 1 unless otherwise stated, with check-in and registration from 8:00 am to 8:30 am.  Classroom instruction will be provided on Day 1.  A written exam will be given on Day 2, with the course concluding by noon on Day 2.  Detailed Course Schedule

The NPDES certification requires a passing score on a written exam.  The written exam is closed-book, and covers the material presented in class.  There is a two-hour time limit for the written exam, and a minimum score of 70% is required to pass.

Upon successful completion of the written exam, participants will receive a five-year certification in National Pollutant Discharge Elimination System (NPDES) from CTTP.  Certified individuals will receive a CTTP certificate and pocket card, and will be added to the CTTP website list of Certified Technicians.  Expiration dates occur on a semi-annual basis, and will be either June 30 or December 31 after the five-year certification period.

Re-certification in NPDES may be achieved by successful completion of the standard 1 ½ day NPDES course.

Participants who do not pass the NPDES course will be required to repeat the entire course.

ARDOT personnel must register for CTTP courses by contacting Ms. Dorothy Rhodes at
(501) 569-2072, or at

ARDOT participants will receive email confirmation directly from CTTP.

Contractors and other non-ARDOT personnel may register for a CTTP course by completing an online registration, or by filling out a registration form and mailing or faxing it to CTTP.  Online registration is preferred, but the registration form may also be printed from the website and submitted to CTTP by fax at (479) 575-7639.  Registration forms may also be obtained by calling the CTTP offices at (479) 575-3997.  Course Fees will apply.

The Concrete Pavement Patching course covers topics pertaining to full depth patching of concrete pavements.  Course topics include concrete basics, site evaluation, site preparation, sawing, concrete removal techniques, base evaluation and preparation, joints, and dowels.  The procedures covered are consistent with those prescribed by the Arkansas Department of Transportation (ARDOT) Standard Specifications for Highway Construction.

This course is not intended to provide basic training, but rather to enhance existing knowledge.  Prior to attending the course, participants should have a working knowledge of the concepts relating to concrete materials and distresses.  Field inspection or other similar experience is strongly recommended.

No pre-requisite courses are required for the Concrete Pavement Patching course.

All necessary equipment and supplies used in the Concrete Pavement Patching course will be furnished by CTTP. A course notebook and pencil is provided to each participant.  Calculators may be borrowed from CTTP; however, students are often more comfortable bringing a calculator with which they are familiar, and routinely use.  Other items that may be useful include a straightedge or ruler, pen, pencil, and highlighter.

CTTP course participants are required to wear applicable personal protective equipment during the outdoor demonstration, including long pants, closed-toe shoes, safety glasses, and safety vests.

Each Concrete Pavement Patching course is a one-day course, and will begin at 8:00 am on Day 1 unless otherwise stated, with check-in and registration from 7:30 am to 8:00 am.  Classroom instruction and outdoor demonstrations will be provided on that day, with the course concluding by approximately 5:00pm.

No exam is given for the Concrete Pavement Patching course.

The Concrete Pavement Patching course is training only.  Because no exam is given, no certification is granted.

ARDOT personnel must register for CTTP courses by contacting Ms. Dorothy Rhodes at
(501) 569-2072, or at

ARDOT participants will receive email confirmation directly from CTTP.

Contractors and other non-ARDOT personnel may register for a CTTP course by completing an online registration, or by filling out a registration form and mailing or faxing it to CTTP.  Online registration is preferred, but the registration form may also be printed from the website and submitted to CTTP by fax at (479) 575-7639.  Registration forms may also be obtained by calling the CTTP offices at (479) 575-3997.  Course Fees will apply.

The Bridge Scour and Stream Stability course covers topics pertaining to the basic concepts relating to scour, inspection, and countermeasures for bridge problems resulting from scour.  This course is delivered by the National Highway Institute, and hosted by CTTP.

This course is not intended to provide basic training, but rather to serve as a refresher and evaluation.  Prior to attending the course, participants should have a working knowledge of the concepts relating to bridge scour.  Field inspection or other similar experience is strongly recommended.

No pre-requisite courses are required for the Bridge Scour and Stream Stability course.

All necessary equipment and supplies used in the Bridge Scour and Stream Stability course will be furnished by CTTP. A course notebook and pencil is provided to each participant.  Calculators may be borrowed from CTTP; however, students are often more comfortable bringing a calculator with which they are familiar, and routinely use.  Other items that may be useful include a straightedge or ruler, pen, pencil, and highlighter.

The Bridge Scour and Stream Stability course does not contain a laboratory component.  Thus, CTTP course participants are required to dress in a professional manner appropriate for the classroom setting, including long pants and closed-toe shoes.

Each Bridge Scour and Stream Stability course will begin at 8:00 am on Day 1 unless otherwise stated, with check-in and registration from 7:30 am to 8:00 am.  Classroom instruction will be provided on Day 1 and Day 2.  A written exam will be given on Day 3, with the course concluding at approximately 12:00 pm on Day 3.

No exam is given for the Bridge Scour and Stream Stability course. However, pre-course and post-course assessments are given and graded for information purposes only. The assessments are published by the National Highway Institute.

The Bridge Scour and Stream Stability course is training only.  Because no exam is given, no certification is granted.

ARDOT personnel must register for CTTP courses by contacting Ms. Dorothy Rhodes at
(501) 569-2072, or at

ARDOT participants will receive email confirmation directly from CTTP.

Contractors and other non-ARDOT personnel may register for a CTTP course by completing an online registration, or by filling out a registration form and mailing or faxing it to CTTP.  Online registration is preferred, but the registration form may also be printed from the website and submitted to CTTP by fax at (479) 575-7639.  Registration forms may also be obtained by calling the CTTP offices at (479) 575-3997.  Course Fees will apply.

On Demand

This online training course is a full version of the Basic Aggregates training that is required for all CTTP certified technicians who wish to achieve re-certification in Basic Aggregates.  Re-certification via the online renewal process provides a five-year certification extension.  Expiration dates occur on a semi-annual basis, and will be either June 30 or December 31 after the five-year certification period.  Technicians may access and complete the Basic Aggregates Certification Renewal up to one year prior to their expiration date.  If the certification is not renewed prior to expiration, existing certifications in Concrete Field Testing Technician, Hot Mix Asphalt Testing Technician, Soils Testing Technician, and Concrete Strength Testing Technician will be revoked until the Basic Aggregates certification is reinstated.

The online Basic Aggregates certification renewal includes a series of modules, each concluding with a knowledge check.  After all modules have been completed, the participant must complete a Final Quiz.  A Final Quiz score of 80% is required for successful completion of the Basic Aggregates Renewal, which will result in a 5-year certification.  Certification results will then be updated on the CTTP website’s list of Certified Technicians.  Online training records are updated/maintained electronically, and include name, CTTP number, quiz score, and completion time.  Certificates of completion may be printed directly from the website after successful completion of the quiz.