Thermal Behaviour of Materials Based on Calcium Sulfo-aluminate Cement

摘要

This paper deals with the thermal behaviour (up to 1,250°C) of different materials based on calcium sulfo-aluminate cement: cement pastes, standard mortars and lightweight mortars. The behaviour of calcium sulfo- aluminate cement pastes containing varying amounts of phosphogypsum (0 to 40%) and two types of calcium aluminate clinker was first investigated. The best behaviour was shown by the pure clinker and the cement containing 20% phosphogypsum. Then, standard mortars containing siliceous sand, and either pure clinker or cement containing 20% phosphogypsum were heated up to 1250°C. They remained intact. Finally, lightweight materials using calcium sulfo-aluminate cement and either perlite or vermiculite were investigated. All samples containing vermiculite remained intact up to 1250°C.^