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| Sampling by this practice covers procedures for obtaining representative samples, on which tests are to be performed to determine__ with quality requirements of the specifications under which the concrete is furnished. |
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| This practice covers sampling from four types of mixers, which are, |
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| Stationary mixers, Drum trucks, Open top mixers, and paving mixers |
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| The elapsed time between obtaining the first and final portions of a composite sample shall not exceed___minutes. |
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| Portions of a composite sample shall be thoroughly remixed before beginning tests on the sample. |
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| Starte slump, temperature, and air content within ____min. after fabricating the composite sample. |
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| Start molding specimens for strength within___minutes after fabricating the composite sample. |
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| The concrete sample must be protected from contamination and____. |
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| The minimum size sample for making strength test specimens is. |
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| 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. |
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| 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. |
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| When sampling from a truck mixer, sample concrete by collecting __ or more portions take at regularly spaced intervals during discharge of the middle portion of the the batch. |
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| Concrete samples from a truck mixer must be obtained before any water or admixtures are added to the mixer at the job site. |
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| The composite sample from a truck mixer must be obtained from the ____portion of the batch. |
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| When the concrete contains aggregate larger than that permitted for a particular test method, the sample of concrete must be ____before making the test. |
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