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Questions and Answers
What was the primary purpose of adding a double dosage of chemical retarder to the concrete?
What was the primary purpose of adding a double dosage of chemical retarder to the concrete?
- To change the type of cement used
- To increase the slump of the concrete
- To reduce the amount of cementitious materials
- To minimize slump losses and maintain workability (correct)
What was the ratio of cement to fly ash in the concrete mixture?
What was the ratio of cement to fly ash in the concrete mixture?
- Equal parts by volume
- 2:1 by weight
- 1:2 by weight
- 1:1 by weight (correct)
What was the average slump loss during the 20-minute testing period?
What was the average slump loss during the 20-minute testing period?
- 1.5 in.
- 0.68 in. (correct)
- 0.5 in.
- 1.0 in.
What was the temperature range of the concrete during testing?
What was the temperature range of the concrete during testing?
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Why were both metal and plastic molds used in testing?
Why were both metal and plastic molds used in testing?
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What was the total number of slump tests performed?
What was the total number of slump tests performed?
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What was the purpose of using a low slump in the initial concrete delivery?
What was the purpose of using a low slump in the initial concrete delivery?
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What is the definition of 'same materials' in the context of this test method?
What is the definition of 'same materials' in the context of this test method?
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Why does this test method have no bias?
Why does this test method have no bias?
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What was the type of cement used in the concrete mixture?
What was the type of cement used in the concrete mixture?
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