Comparison between the effects of phosphorous slag and fly ash on the C-S-H structure, long-term hydration heat and volume deformation of cement-based materials

Fly ash (FA) has been widely used in hydraulic projects. The utilization of phosphorous slag (PS) to partially or completely replace FA in hydraulic concrete has gained much attention in China in recent years. In this study, the effects of PS and FA on C-S-H structure, long-term hydration heat, hydration products, mechanical properties and volume deformation of cement paste/concrete were investigated and compared via 29Si NMR nuclear magnetic...