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22 Cards in this Set
- Front
- Back
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The slump test is applicable to plastic concrete with a maximum size aggregate of _____ |
1 1/2" |
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When the concrete contains aggregate larger than allowed for the slump test, the large aggregate must be _____ |
Wet Sieved |
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The mold for making the slump test is in the shape of ______ |
Cone |
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The height of the slup mold is |
12" +- 1/8" |
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The interior surface of the slump is allowed to have minor irregularities. T or F |
False |
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For use in the slump test, the end of both ends of the tamping rod must be |
Rounded |
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The sample of concrete for use in making the slump test must be obtained in accordance with ASTM Standard |
C-172 |
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The slump mold should be in a dry condition before beginning the test. T or F |
False |
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The surface on which the slump mold will be placed must be |
Level / Moist |
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The slump mold is filled _____ layers |
3 |
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Each layer should fill approximately _____ the volume of the mold |
1/3 |
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The approximate concrete depth (in vertical distance) after placing the first layer is _____ and the second layer is _____ |
2 5/8 and 6 1/8 |
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What is the specified number of roddings for each layer? |
25 |
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How deep should the tamping rod penetrate into each layer? |
1'' |
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When rodding the bottom layer, the tamping rod must be _____ to uniformly distribute the strokes |
angled |
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What must be done if the concrete drops below the top of the slump mold while the top layer is being rodded? |
Add additional material |
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Prior to lifting the mold, concrete must be removed from |
Bottom of Mold |
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After the final rodding, the sides of the slump mold should be tapped lightly with the tamping rod. T or F |
False |
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When raising the slump mold, it should not be rotated or twisted |
True |
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How much time is allowed for lifting the slump mold? |
5 seconds +- 2 seconds |
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The measurement for slump is made from the top of the mold to what point of the concrete specimen? |
Displaced Center |
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The slump of the concrete is measured and reported to the nearest |
1/4'' or 5mm |
