Concrete accelerators
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United States of America Patent
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Dec 7, 1999
Grant Date -
N/A
app pub date -
Jun 28, 1996
filing date -
Jun 28, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An accelerating admixture for use with spraying cementitious compositions such as shotcrete comprises (a) a compound selected from aluminium hydroxide, aluminium hydroxysulphate and mixtures thereof, and (b) an acidic substance which essentially does not react with the compound. The preferred acid substances are organic acids.
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