CONCRETE OPTIMIZED FOR HIGH WORKABILITY AND HIGH STRENGTH TO CEMENT RATIO
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Abstract
A concrete composition having a 28-day design compressive strength of 4000 psi and a slump of about 5 inches is optimized to have high workability and a high strength to cement ratio. The concrete composition contains about 375 pounds per cubic yard hydraulic cement (e.g., Portland cement), about 113 pounds per cubic yard pozzolanic material (e.g., Type C fly ash), about 1735 pounds per cubic yard fine aggregate (e.g., FA-2 sand), about 1434 pounds per cubic yard coarse aggregate (e.g., CA-11 state rock, ¾ inch), and about 294 pounds per cubic yard water (e.g., potable water). Workability and strength to cement ratio were increased compared to one or more preexisting concrete compositions having the same 28-day design compressive strength and similar slump by optimizing the ratio of fine aggregate to coarse aggregate. The concrete composition is further characterized by high cohesiveness, resulting in relatively little or no segregation or bleeding.
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Citations
30 Claims
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1-15. -15. (canceled)
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16. A concrete composition having high workability and a high strength to cement ratio, comprising:
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hydraulic cement in an amount of 366±
5% pounds per cubic yard;a pozzolanic material in an amount of 110±
5% pounds per cubic yard;a fine aggregate in an amount of 1654±
5% pounds per cubic yard;a coarse aggregate in an amount of 1367±
5% pounds per cubic yard;water in an amount of 269±
5% pounds per cubic yard; andan air entraining agent in an amount of about 1.4±
5% fluid ounces per cwt of hydraulic cement. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A concrete composition having high workability and a high strength to cement ratio, comprising:
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Type I and/or Type II Portland cement in an amount of 366±
5% pounds per cubic yard;Type C fly ash in an amount of 110±
5% pounds per cubic yard;sand in an amount of 1654±
5% pounds per cubic yard;rock in an amount of 1367±
5% pounds per cubic yard;water in an amount of 269±
5% pounds per cubic yard; andan air entraining agent in an amount of 1.4±
5% fluid ounces per cwt of hydraulic cement,the concrete composition having a 28-day design compressive strength of 4000 psi and a slump of at least about 5 inches as measured using a 12 inch slump cone according to ASTM C143.
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29. A concrete composition having high workability and a high strength to cement ratio, comprising:
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Type I and/or Type II Portland cement in an amount of 366±
3% pounds per cubic yard;Type C fly ash in an amount of 110 pounds±
3% per cubic yard;sand in an amount of 1654 pounds±
3% per cubic yard;rock in an amount of 1367 pounds±
3% per cubic yard;water in an amount of 269 pounds±
3% per cubic yard; andan air entraining agent in an amount of 1.4±
3% fluid ounces per cwt of hydraulic cement,the concrete composition having a 28-day design compressive strength of 4000 psi and a slump of at least about 5 inches as measured using a 12 inch slump cone according to ASTM C143.
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30. A concrete composition having high workability and a high strength to cement ratio, comprising:
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Type I and/or Type II Portland cement in an amount of 366±
1% pounds per cubic yard;Type C fly ash in an amount of 110 pounds±
1% per cubic yard;sand in an amount of 1654 pounds±
1% per cubic yard;rock in an amount of 1367 pounds±
1% per cubic yard;water in an amount of 269 pounds±
1% per cubic yard; andan air entraining agent in an amount of 1.4±
1% fluid ounces per cwt of hydraulic cement,the concrete composition having a 28-day design compressive strength of 4000 psi and a slump of at least about 5 inches as measured using a 12 inch slump cone according to ASTM C143.
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Specification