改性水硬性石灰基材料的制备与性能研究

发布时间：2018-03-28 15:27

本文选题：水硬性石灰　切入点：强度　出处：《新型建筑材料》2017年02期

【摘要】：水硬性石灰作为一种传统的硅酸盐建筑材料,广泛应用于历史建筑文物的修复中。研究了矿粉及其它外加剂改性的水硬性石灰的配合比优化设计方法、物理力学性能、水化硬化机理。研究表明:掺加4种外加剂(黏性助剂、粘结助剂、触变助剂、抗裂助剂)及亚硝酸钙能够提高试样的抗折强度,对抗压强度提升作用有限;当磨细矿粉作为掺合料复合石灰后,抗压强度显著提高,综合抗压和抗折强度,最优配合比为60%石灰+40%矿粉+0.8%四种外加剂+2.0%亚硝酸钙,此时,抗折和抗压强度分别为1.44、13.90 MPa。
[Abstract]:As a kind of traditional silicate building material, hydrated lime is widely used in the restoration of historical buildings. The optimum design method and physical and mechanical properties of hydrated lime modified by mineral powder and other admixtures are studied. The mechanism of hydration and hardening. The results show that the addition of four admixtures (viscosity, bonding, thixotropic, crack resistance) and calcium nitrate can improve the flexural strength of the samples, but have limited effect on the compressive strength. When pulverized ore powder is used as admixture of composite lime, the compressive strength is improved significantly. The optimum mix ratio is 60% lime, 40% mineral powder, 0.8% mineral powder, 0.8% calcium nitrite, and the compressive strength is 1.44n0.90MPa, and the optimum mixture ratio is 60% lime, 40% ore powder, 0.8% mineral powder, and 2.0% calcium nitrite.
【作者单位】：北京工业大学城市与工程安全减灾教育部重点实验室工程抗震与结构诊治北京市重点实验室;北京国文琰文化遗产保护中心有限公司;
【基金】：教育部“新世纪优秀人才支持计划”项目(NCET-12-0605) 北京市属高等学校高层次人才引进与培养计划项目(CIT&TCD20150310)
【分类号】：TQ177.27

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