Title: Study of the Mechanism Through Which Calcium Chloride Accelerates the Set of Portland Cement

Author(s): Arnold M. Rosenberg

Publication: Journal Proceedings

Volume: 61

Issue: 10

Appears on pages(s): 1261-1270

Keywords:

DOI: 10.14359/7826

Date: 10/1/1964

Abstract:
A kinetic study of the reaction between calcium chlorid and portland cement was made. It was found that: (1) Althrough calcium chloride reacts with CA A, the reaction rate, particularly in the presence of gypsum, is too slow to account for the set acceleration; (2) CaCl2 definitely accelerates strength development in hydrating C I S but does not react chemically with the CI S; (3) Electron micrographic evidence suggests that CaC12 alters the shape of the hydration products formed when cement sets.