Method for the reduction of the degree of shrinkage of hydraulic binders
AssigneeSika AG, vorm. Kasper Winkler & Co.
InventorsFranz Wombacher, Theodor A. Bürge, Urs Mäder
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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 C1-C6-alkyl group, and A is a C2H4-group or C3H6-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.
Claims8
A method for the reduction of the degree of shrinkage of hydraulic binders in pure form or as admixture with latent hydraulic binders or inert fillers, as well as thereof produced mortar or concrete, said method comprising admixing a shrinkage reducing agent and a hydraulic binder or composition containing a hydraulic binder or inert fillers, said shrinkage reducing agent comprising:
- a) at least one alkanolamine of formula I
- R—NH—(AOH) I,
- wherein R is hydrogen or a linear or a branched aliphatic or cyclic C1-C6-alkyl group, and A is a C2H4— or C3H6-group, alone or in combination with
- b) at least one hydroxy compound and/or
- c) at least one ether compound.
Dependencies are inferred from the claim text.