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Sulfate and acid resistant concrete and mortar

Patent ·
OSTI ID:871656
 [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 and other applications, which hardenable mixtures demonstrate significant levels of acid and sulfate resistance while maintaining acceptable compressive strength properties. The acid and sulfate hardenable mixtures of the invention containing fly ash comprise cementitious materials and a fine aggregate. The cementitous materials may comprise fly ash as well as cement. The fine aggregate may comprise fly ash as well as sand. The total amount of fly ash in the hardenable mixture ranges from about 60% to about 120% of the total amount of cement, by weight, whether the fly ash is included as a cementious material, fine aggregate, or an additive, or any combination of the foregoing. In specific examples, mortar containing 50% fly ash and 50% cement in cementitious materials demonstrated superior properties of corrosion resistance.

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 5772752
OSTI ID:
871656
Country of Publication:
United States
Language:
English

References (4)

Hydration of fly ash-portland cements journal July 1984
Fly Ashes Used For Blended Portland Cement: Effect Of Grinding on Cement Quality journal January 1988
Optimized determination of PFA (fly ash) fineness with reference to pozzolanic activity journal July 1980
Effects of low calcium fly ash on sulfate resistance of OPC cement journal March 1989

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