Effect of chloride salts on sulfoaluminate cement hydration

The effect of including 5 % chloride salts (NaCl and CaCl2) on calcium sulfoaluminate cement hydration was studied. The rate of heat release, setting times and mechanical strength were determined in 2 d, 28 d and 90 d cement pastes. The hydration products formed at those ages were identified with XRD and SEM. Hydration reactions were hastened...

Pore solution chemistry of expansive heat cured cementitious systems

Heat cured cement mortars may result in linear expansion due to later age ettringite precipitation, popularly termed as delayed ettringite formation (DEF). However, later age ettringite precipitation may not result in expansion always. To differentiate the expansive and non-expansive nature of heat-cured cementitious systems, in this research...

Strength development and hydration progress of a cement-based solidifying agent used in cementtreated soil containing volcanic mineral components

This study investigates the relationship between the strength development and hydration progress of cement-based solidifying agents (CBSAs) in cement-treated soil with volcanic mineral components. A CBSA is a cement-based material used as a soil stabilizer. It is known that the strength development of cement-based materials is inhibited by...

Surface crack self healing behaviour of mortars with expansive additives (abstract)