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Compressive strength of concrete and mortar containing fly ash

Patent ·
OSTI ID:870915
 [1];  [2];  [3]
  1. Belle Mead, NJ
  2. Parsippany, NJ
  3. Bangkok, TH
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The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strength than hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula is provided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concrete and mortar containing about 15% to 25% fly ash as a replacement for cement, which are capable of meeting design specifications required for building and highway construction, are provided. Such materials can thus significantly reduce construction costs.

Research Organization:
New Jersey Institute of Technology (Newark, NJ)
DOE Contract Number:
FG22-90PC90299
Assignee:
New Jersey Institute of Technology (Newark, NJ)
Patent Number(s):
US 5624491
OSTI ID:
870915
Country of Publication:
United States
Language:
English

References (6)

Hydration of fly ash-portland cements journal July 1984
Optimized determination of PFA (fly ash) fineness with reference to pozzolanic activity journal July 1980
Concrete Incorporating High Volumes of ASTM Class F Fly Ash journal January 1988
Speciation in Size and Density Fractionated Fly Ash journal January 1985
Class F Fine Fly Ash journal January 1989
Modeling of Fly Ash Concrete Mixtures journal January 1985

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