Title: Effect of the Stereochemistry of Polyols on the Hydration of Cement: Influence of Aluminate and Sulfate Phases

Author(s): Camille Nalet and André Nonat

Publication: Symposium Paper

Volume: 302

Issue:

Appears on pages(s): 349-358

Keywords: adsorption; aluminate; cement; complexation; hydration; kinetics; polyols; reactivity; stereochemistry

DOI: 10.14359/51688108

Date: 6/1/2015

Abstract:
The difference in the retarding effects induced by sugar alcohols on the hydration of pure tricalcium silicate and white cement pastes is investigated. The polyols studied which are stereoisomers (D-glucitol, D-galactitol and D-mannitol) generate a lower retarding effect on the hydration of white cement than on the hydration of pure tricalcium silicate. The presence of aluminate and sulfate phases in white cement pastes is shown to reduce the retarding effect induced by the molecules. Moreover, these alditols strongly complex aluminate in solution and adsorb on hydrating cement. The interactions of polyols with the anhydrous and/or hydrated aluminate phases and their effects on the hydration kinetics of white cement are discussed.