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Title: Compressive strength of concrete and mortar containing fly ash

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.
Inventors:
 [1];  [2];  [3];  [4]
  1. (Belle Mead, NJ)
  2. (Parsippany, NJ)
  3. (Bangkok, TH)
  4. (late of Livingston, NJ)
Issue Date:
OSTI Identifier:
870915
Assignee:
New Jersey Institute of Technology (Newark, NJ) NETL
Patent Number(s):
US 5624491
Contract Number:
FG22-90PC90299
Research Org:
New Jersey Institute of Technology (Newark, NJ)
Country of Publication:
United States
Language:
English
Subject:
compressive; strength; concrete; mortar; containing; fly; ash; relates; hardenable; mixtures; comprising; cement; construction; method; predicting; mixture; planning; achieve; time; period; relevant; specific; embodiment; formula; provided; accurately; predicts; 180; days; examples; 15; 25; replacement; capable; meeting; design; specifications; required; building; highway; materials; significantly; reduce; costs; mortar containing; comprising cement; significantly reduce; mixtures comprising; hardenable mixture; specific examples; compressive strength; fly ash; time period; specific embodiment; containing fly; hardenable mixtures; mixtures containing; specific example; accurately predict; design specifications; /106/264/

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