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Questions and Answers
What was the ratio of cementitious materials in the concrete mixture?
What was the ratio of cementitious materials in the concrete mixture?
- 500 lb equally divided between cement and fly ash (correct)
- 300 lb of cement and 200 lb of fly ash
- 400 lb of cement and 100 lb of fly ash
- 600 lb of cement and 400 lb of fly ash
What was the purpose of adding a double dosage of chemical retarder?
What was the purpose of adding a double dosage of chemical retarder?
- To increase the slump of the concrete
- To reduce the temperature of the concrete
- To minimize slump losses and maintain workability (correct)
- To increase the strength of the concrete
What was the average slump loss during the 20-minute test?
What was the average slump loss during the 20-minute test?
- 1.08 in.
- 0.48 in.
- 0.68 in. (correct)
- 0.88 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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What was the total number of slump tests performed?
What was the total number of slump tests performed?
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Why was the precision data applicable to both metal and plastic molds?
Why was the precision data applicable to both metal and plastic molds?
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What is the definition of 'same materials' in this context?
What is the definition of 'same materials' in this context?
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What is the bias of this test method?
What is the bias of this test method?
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What was the unit of measurement used to develop the precision statement?
What was the unit of measurement used to develop the precision statement?
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What is the purpose of the retarder in the concrete mixture?
What is the purpose of the retarder in the concrete mixture?
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