Method for reducing hydration heat release of magnesium oxychloride cement

一种降低氯氧镁水泥水化放热量的方法

Abstract

The invention discloses a method for reducing hydration heat release of magnesium oxychloride cement. The method comprises the following steps: mixing ore-mixed magnesium oxide, magnesium chloride, water and a chemical admixture at the mass ratio of (1.2-2.8) to 1 to (2-3.2), so as to form the magnesium oxychloride cement, wherein the ore-mixed magnesium oxide comprises magnesium oxide and a mineral admixture, the mass ratio of the mineral admixture to the ore-mixed magnesium oxide is (1-6) to 20, and the mass ratio of the chemical admixture to the ore-mixed magnesium oxide is (1-3) to 100. According to the method, the chemical admixture and the mineral admixture are doped into a magnesium oxide-magnesium chloride-water ternary material system in the preparation process of the magnesium oxychloride cement, and thus the targets that the hydration heat release of the magnesium oxychloride cement is reduced, the induction period end time and the acceleration period end time are prolonged, meanwhile, the amount of the raw material-magnesium oxide is replaced with addition of the mineral admixture can be achieved; and the cost of the magnesium oxychloride cement can be reduced to a certain extent.
本发明公开了一种降低氯氧镁水泥水化放热量的方法,包括步骤:将质量比为1.2~2.8:1:2~3.2的矿掺氧化镁、氯化镁、水,及化学外加剂混合均匀,形成氯氧镁水泥;其中,矿掺氧化镁包括氧化镁和矿物掺合料,矿物掺和料的质量与矿掺氧化镁的质量的比例为1~6:20,化学外加剂的质量与矿掺氧化镁的质量的比例为1~3:100。该方法通过在氯氧镁水泥的制备过程中,向氧化镁-氯化镁-水的三元原料体系中掺杂化学外加剂和矿物掺和料,达到了降低氯氧镁水泥水化放热量、延长诱导期结束时间及加速期结束时间的目的;同时,矿物掺合料的加入代替了原料氧化镁的用量,也在一定程度上可降低该氯氧镁水泥的成本。

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Cited By (1)

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    CN-105367036-AMarch 02, 2016中国科学院青海盐湖研究所Low-temperature magnesium oxychloride cement and preparation method therefor