Influence of Caustic Soda Flakes-Phosphogypsum on Activation and Micrestructure of Carbide Slag-Flyash

摘要

This article studied the influence of the caustic soda flakes (CSF) - phosphogypsum (Ard) activator on the properties and microstructure of hydration product generated by carbide slag(CS)-flyash(FA) system which used in high-grade highways pavement. Studies have shown that: the main hydration products generated by carbide slag-flyash system are calcium silicoaluminate hydrate (C-A-S-H) and ettringite (AFt), but the reaction of hydration is slow and the content of hydration products is low. However, the caustic soda flakes -phosphogypsum can promote the formation of C-A-S-H and AFt, so can improve the strength and engineering application of the system effectively.