ISSN: 0090-3973
Page Count: 9

Influence of Calcium Chloride on the Drying Shrinkage of Alite Paste
Berger, RL
Professor, Departments of Civil and Ceramic Engineering; research assistant, Department of Ceramic Engineering; and associate professor, Department of Civil Engineering, University of Illinois, Ill.

Kung, JH

Young, JF

Abstract

The drying shrinkage at 55% relative humidity of alite pastes with and without 1% calcium chloride (CaCl²) at equal degrees of hydration was investigated. CaCl² increases drying shrinkage at all levels of hydration studied. However, the difference in drying shrinkage of pastes with and without 1% CaCl² decreased with increased hydration. Shrinkage of pastes with CaCl² decreased with increasing hydration (40 to 75%), whereas shrinkage of pastes without CaCl² increased with increasing hydration (43 to 62%). A larger weight loss during drying was noted in pastes without CaCl². Reference is made to the relationship between the observed shrinkage in alite pastes and differences in the pore size distributions of tricalcium silicate pastes with and without CaCl².

Keywords:
shrinkage, admixtures, calcium silicates, calcium chloride, alite paste

Paper ID: JTE10511J
DOI: 10.1520/JTE10511J
ASTM International is a member of CrossRef.