COMPOSITION FOR IMPROVING FREEZE/THAW DURABILITY OF MASONRY CONTAINING FATTY ACID-BASED EFFLORESCENCE CONTROL AGENTS

摘要

A composition for improving the freeze thaw durability of masonryconcrete comprising (i) an alkylaryl polyether alcohol having the formulaR~(OCH2CH2)xOH, wherein R is a C4-C5 alkyl group (preferably branched),~ represents a phenol group, and "X" represents an integer in the range of3-70; and (ii) at least one efflorescence control admixture, such as a C8-C30fattyacid or its salt or derivative. An exemplary masonry concrete composition ofthe invention comprises an alkylaryl polyether alcohol having the formulaR-~-(OCH2CH2)XOH, wherein R is a C4-C8 alkyl group, ~ represents a phenolgroup, and "X" represents an integer in the range of 3-70; the composition,when wet, having essentially zero slump when tested by the standard conemethod for measuring slump. Methods of improving the freeze-thawdurability of masonry units are also disclosed.