Researching on Water Resistance Improvement of Magnesium Phosphate Cement
Magnesium phosphate cement(MPC) is a novel cementing material characterized by Early strength and fast hard. The present researches refer to the chemical composition, hydration mechanism, mechanic and repairing performance of MPC while seldom come to the water resistance. This paper compared the water resistance of MPC with different amount of aluminum salt, ferric salt, coal ash and outer waterproof agent. The results indicated that aluminum salt, ferric salt, coal ash and outer waterproof agent can all improve the water resistance of MPC in some extent. For instance, when the proportion of ferric salt was 0.50%, the strength retention of 90 d of MPC was 88.09%.when the proportion of ferric salt was 0.75%, the strength retention of 90d of MPC was 80.18%. It achieved cheerful effect about the water resistance of MPC. When the proportion of coal ash and increasing of the waterproof agent. It also improved the water resistance of MPC significantly. With the increasing of the waterproof agent, the compression strength of the solid MPC specimen is growing at the same time.
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NSTL
万方数据
维普
