磷渣对硅酸盐水泥的缓凝机理研究

fter analysis of retardation mechanisms of phosphorous slag on portland cement, they were not full reason by experiment. This paper presents another mechanism — Absorbed mechanism which is the absorption of phosphorous slag by semipermeable　hydration production membrane produced at initial time of hydration of portland cement, that induce to more impermeable of the membrane and more difficult for ions and water to travel through it, then rate of hydration decreases, so setting of portland cement is retarded. And the mechanism is used to analyze the reason of influence of special surface and content of P2O5 and F- of phosphorous slag on the setting time of portland cement.