ACI Concrete Field Testing Technician Grade 1 Questions & 100% Verified Answers | Latest Update | Already Graded A+

Collecting a representative sample of concrete to be tested is as important as executing the test methods to obtain ☑: accurate results This practice covers sampling from 4 types of equipment: ☑: stationary, paving, revolving truck, continuous The elapsed time between obtaining the first and final portions of a composite sample shall not exceed ☑: 15 minutes Portions of a composite sample shall be thoroughly remixed before beginning tests on the sample. True or False? ☑: True Start tests for slump, temperature, and air content within _____ after obtaining the final portion of the composite sample ☑: 5 minutes EXCELLENCE 2 Start molding specimens for strength tests within _______ after fabricating the composite sample ☑: 15 minutes The concrete sample must be protected from contamination and ☑: evaporation the minimum size sample for making strength test specimens is ☑: 1 cubic foot When sampling from a stationary mixer, the batch must be sampled at ____ or more regularly spaced intervals during discharge of the middle portion of the batch. ☑: two When sampling from a paving mixer, obtain samples from at least ____ different portions of the pile and combine them into one composite sample for test purposes ☑: five When sampling from a revolving truck mixer, sample the concrete by collecting ____ or more portions take at regularly spaced intervals during