【摘 要】
：
To understand the influence of limestone on reducing water stability of magnesium potassium phosphate cement (MKPC) pastes, effect of limestone content on the hydration temperature, setting time, comp
【机 构】
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College of Civil Engineering, Hunan University, Changsha, China
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
To understand the influence of limestone on reducing water stability of magnesium potassium phosphate cement (MKPC) pastes, effect of limestone content on the hydration temperature, setting time, compressive strength and early water stability of magnesium potassium phosphate cement (MKPC) was investigated.The cause of water stability deteriorated were analyzed by testing and analyzing the pore structure, pH values of the immersion fluid of hardened MKPC paste, leaching substances and total phosphorus contents.The results showed that adding limestone to the magnesium phosphate cement matrix accelerates the setting reaction of MKPC,decreases the total heat evolution of MKPC and clearly degrade the strengths.But increasing the limestone content did not affect the formation of new phases to any appreciable extent.The performance of bad water stability may be caused by worse pore structures, higher pH value and phosphate dissolution after adding limestone.
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