This workbook contains information about the ACI Aggregate Base Testing Technician (ABTT) certification program, performance checklists, and reprints of all the AASHTO resource materials referenced by the certification examinations. The ATT1 program includes the following AASHTO standards: R 90, T 248, R 58, T 89, T 90, T 88, T 265, T 180, and T 99.
Table of Contents
Job Task Analysis
Answers to Study Questions
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