Mineral Composition and Performance of Phosphoaluminate Clinker with Addition of SO3

The effect of SO3 on the mineral composition and performance of phosphoaluminate clinker was investigated by means of XRD, IR and SEM. Also, the compressive strength of clinker was performed. The experimental results showed that a certain amount of SO3 would promote the formation of calcium phosphoaluminate mineral, which was good for the strength development of phosphoaluminate clinker. Moreover, the addition of SO3 was benefit to the formation of C4A3 in phosphoaluminate clinker. So, the 5% dosage clinker owns a good strength development.