gradations

Whether we use asphalt or concrete, the aggregate has to be tested. For asphalt is has to be test every 1000 tons, for concrete it's every 250 tons. You have to run moisture tests and sieve analysis. Technically the material is to be tested before it goes on the job. Since in Wichita, we normally only do concrete, gradations is the responsiblilty of the concrete guy. Appareently the last concrete guys didn't run enough tests, so now we have to run tests after the fact. They had me in the lab running tests along with another ET. Eventually they left me alone running tests, which is simple enough, but I'm not certified to run them. I don't go to the aggregate testing class until April.