Title:
Expansive Admixtures in Structural Grout
Author(s):
Noel Mailvaganam, Stacey Nunes, and Raj Bhagrath
Publication:
Concrete International
Volume:
15
Issue:
10
Appears on pages(s):
38-43
Keywords:
admixture; expansion; grout; shrinkage; volume change; Materials Research
DOI:
Date:
10/1/1993
Abstract:
Shrinkage compensating cements currently used in structural grouts do not provide the required volume stability in some in-service environments. Consequently, some grout manufacturers use expansive admixtures. However, erratic results in the application of the expansive admixtures have been reported. Four proprietary expansive admixtures, two lime-based and two calcium sulfoaluminate- (CSA) based, were investigated to determine their suitability as alternatives for Type K cement in structural grout compositions. The results show that at higher dosages, the CSA-based admixtures provide better shrinkage compensation than either Type K cement or lime-based expansive admixtures. The CSA-based admixtures enable structural grouts to meet the requirements of the more demanding in-service environments.