SHRINKAGE REDUCER FOR CEMENT

摘要

PURPOSE:To obtain a low-cost shrinkage reducer for cement capable of reducing the shrinkage of cement due to drying when added by a small amt. by using alcohol represented by a specified general formula. CONSTITUTION:This shrinkage reducer for cement is made of a mixture of one or more kinds of alcohols represented by a general formula ROH (where R is 4-6C alkyl or 5-6C cycloalkyl), reduces the shrinkage of cement due to drying when added by a small amt. and prevents the cracking of cement mortar and concrete due to drying. The alcohols may be butanol and cyclopentanol. This shrinkage reducer is generally used by about 0.5-10wt.% of the amt. of cement.