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8 Cards in this Set
- Front
- Back
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The concrete sample must be protected from contamination and ... |
Rapid evaporation |
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When sampling From stationary mixers perform sampling by passing a receptacle ......, Through the .....,..... |
Completely, discharge stream |
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This practice covers procedures for obtaining representative samples of fresh as delivered to the project site on which tests are to be performed to determine compliance with ..... .... Of the specifications under which the concrete is furnished |
Quality requirements |
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The first and final portion of the sample shall be..... , And ...., With a shovel the minimum amount necessary to ensure ..... , And.....with the maximum time limits. |
Combined, remixed, uniformity, compliance |
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Protect the sample from ......,...... And other sources of ......,...... And from .... |
Sun,wind, rapid evaporation, contamination |
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Smaller samples may be permitted for routine air content, temperature, and slump tests and the size of the sample shall be dictated by the .....,.....,...... |
Maximum aggregate size |
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What must occur before a sample of concrete can be taken from a revolving drum mixer ? |
All water and admixtures must be added to the mixer |
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When sampling from a stationary or revolving drum mixer , what is collected and when is it taken during discharge? |
In two or more portions of concrete At regularly spaced intervals From the middle of the batch |
