Division of Materials and Tests

TDOT Certification:

Soils and Aggregate Technician Certification Program

 

Course Title:  Soils and Aggregate Certified Testing Technician Course

Certification Level:  Grade I

Course Description

The TDOT Soils and Aggregate Certified Testing Technician is an individual who has demonstrated the knowledge of and ability to interpret the results of basic field and laboratory tests on soils and aggregates as well as perform calculations necessary to report the data from each test.

Scope of Course

The program requires a working knowledge of the following AASHTO/ASTM Standards:

AASHTO T 2/ASTM D 75 - Sampling of Aggregates

AASHTO T 248/ASTM C 702 - Reducing Samples of Aggregate to Testing Size

AASHTO T 27/ASTM C 136 - Sieve Analysis of Fine and Coarse Aggregates

AASHTO T 255/ASTM C 566 - Total Evaporable Moisture Content of Aggregate by Drying

AASHTO T 11/ASTM C 117 - Materials Finer Than 75-mm (No. 200) Sieve in Mineral Aggregates by Washing

AASHTO T 19/ASTM C 29 - Bulk Density ("Unit Weight") and Voids in Aggregate

AASHTO T 84/ASTM C 128 - Specific Gravity and Absorption of Fine Aggregate

AASHTO T 85/ASTM C 127 - Specific Gravity and Absorption of Coarse Aggregate

AASHTO T 88 - Particle Size Analysis of Soils

AASHTO T 89 - Determining the Liquid Limit 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 a 4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop

AASHTO T 100/ASTM D 854 - Specific Gravity of Soils

AASHTO T 224 - Correction for Coarse Particles in the Soil Compaction Test

AASHTO T 265 - Laboratory Determination of Moisture Content of Soils

Prerequisites

Supervisor's approval and written recommendation

A basic understanding of embankment construction and inspection; aggregate testing

Familiarity with applicable TDOT Standard Specifications, Supplemental Specifications, and Special Provisions

Mathematical skills through basic algebra

Certification Requirements

TDOT will grant certification to those applicants who meet both of the following requirements:

A passing grade on the written examination:

The one-hour written examination is "open book" and consists of 55 multiple choice questions. There are five (5) to ten (10) questions on each of the AASHTO/ASTM Standards. To pass the written examination, both of the following conditions must be met:

(a) at least 60% correct for each of the required standards; and 

(b) a minimum score of 70% overall.

Recertification is necessary every five (5) years and requires that the technician attend the classes and successfully complete the written and performance examinations.

*NOTE: Cheating on any level WILL ABSOLUTELY NOT BE TOLERATED and will result in immediate expulsion from the course and a notification of supervisors and directors.

The use of cell phone calculators WILL NOT be permitted during exam.

 

Study Materials

Text:  Soils and Aggregates.  This is a study guide for the student covering information and procedures on the standards and test methods listed above and other relevant policies, procedures, and information:

AASHTO T 2/ASTM D 75

AASHTO T 248/ASTM C 702

AASHTO T 27/ASTM C 136

AASHTO T 255/ASTM C 566

AASHTO T 11/ASTM C 117

AASHTO T 19/ASTM C 29

AASHTO T 84/ASTM C 128

AASHTO T 85/ASTM C 127

AASHTO T 88

AASHTO T 89

AASHTO T 99

AASHTO T 180

AASHTO T 100/ASTM D 854

AASHTO T 224

AASHTO T 265

TDOT Standard Specifications for Road and Bridge Construction

TDOT Supplemental Specifications

TDOT Circular Letters

TDOT Aggregate Approval Process

TDOT Material Testing Schedule

TDOT Material Testing Guide

Presentation slides:  Presented in class.

Handouts:  Distributed in class.

Forms:  Distributed in class.

Software:  Distributed in class.

How to Register

A Valid Photo ID must be presented upon check-in