Additive composition for Portland cement materials
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United States of America Patent
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-
Jun 29, 1982
Grant Date -
N/A
app pub date -
May 11, 1981
filing date -
May 11, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An additive composition has been formulated which accelerates the setting time, and also improves the compressive strength of Portland type cement, mortars and concretes. The additive composition consists essentially of a concentrated aqueous solution of calcium nitrate and a waste byproduct stream of a mixture of polyethanolamines (referred to as 'triethanolamine bottoms') to which solution is added a minor amount of an alkali metal or alkaline earth metal salt of a polyhydroxy aliphatic compound such as gluconic acid, or of lignosulfonic acid.
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