GDOT Asphalt QC LEVEL 1 Questions and Answers with complete solution

What procedure is used to sample bituminous materials? - GSP 10 What procedure is used to sample hot mix asphalt mixtures from full trucks, roadways, or occasionally partially loaded trucks? - GSP 15 How do you take a HMA sample from a truck? - Shovel off about 60% of the cone and go atleast 6 inches deep. What kind of shovel do you use to take a sample off of a truck? - A square nosed shovel. What procedure governs the sampling procedures for contractor acceptance testing of HMA? - GSP 21 When should the QC take the temperature of the mix and what is the tolerance? - Every time a sample is take. +- 20f or +- 11c If a sample meets a 1.00 pay factor, how many days does the department have to pick it up before it can be discarded? - 3 days If a sample does not meet a 1.00 pay factor, how many days does the department have to pick it up before it can be discarded? - 7 days When determining the AC contents,, what should be attached and submitted to the branch lab? - The long burn ticket and the random number sheet. What tolerance is there on daily lime checks? - +- 10% of Job Mix Formula(JMF) How often should weight systems for lime be checked? - Twice per week (7 days)When do you take a Abson Recovery Sample? (RAP) - On mixtures that contain more than 20% RAP. When do you take liquid AC samples? - When the plant has been down for 7 days, twice per week on interstate projects, once per week on non interstate projects What test method is used for bulk specific gravity? - GDT 39 What test method is used to determine the heat stability of a liquid anti-strip additive in bituminous mixtures? - GDT 56 What test method is used for finding the random number for sampling? - GDT 73 What test method is used to determine the bitumen content of hot paving mixtures by using the vacuum extractor? - GDT 83