Research Progresses in Water Resistance of Magnesium Phosphate Cement
Magnesium phosphate cement(MPC)is a new rapid hardening cementitious material with fast condensation, which possesses many advantages including small dry shrinkage, excellent resistance to freezing, high early strength and so on, it has been applied to the engineering repair and solidification of harmful substances. Based on the hydration products of MPC, the mechanism of water resistance of MPC was analyzed, and the influence factors of the water resistance were discussed, such as proportion of raw materiasl, MgO grain fineness, curing humidity and temperature, retarder and so on. Some measures for improving water resistance of MPC were put forward, such as using the waterproofing agent, increasing maintenance time, adding additive and admixture.
magnesium phosphate cementresistance to watermechanism
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