Method for the reduction of the degree of shrinkage of hydraulic binders
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United States of America Patent
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Mar 30, 2004
Grant Date -
Oct 31, 2002
app pub date -
Apr 25, 2002
filing date -
Jan 29, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
On object of the present invention is an agent for the reduction of the degree of shrinkage in hydraulic binders, whereby said comprises an alkanolamine of formula R--NH--(AOH) wherein R is hydrogen or a linear or branched aliphatic or cyclic C.sub.1 -C.sub.6 -alkyl group, and A is a C.sub.2 H.sub.4 -group or C.sub.3 H.sub.6 -group, alone or in combination with hydroxy compounds and/or ethers. Furthermore a method for the reduction of the dry shrinkage of binders such as cement, admixed cement, puzzolanas and thereof produced mortars and concretes by means of such a shrinkage reducing agent is described.
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