石灰石粉对氯氧镁水泥性能的影响

发布时间：2018-06-01 07:50

本文选题：石灰石粉 + 氯氧镁水泥　；参考：《材料导报》2015年10期

【摘要】：为合理利用生产石灰石集料的副产品——石灰石粉,发展绿色建筑材料,研究了不同掺量石灰石粉对氯氧镁水泥初凝时间、终凝时间、强度、耐水性及耐硫酸盐腐蚀性能的影响,并观察了掺入石灰石粉后氯氧镁水泥微观形态的变化。试验结果表明:随着石灰石粉掺量的增加,镁水泥的初、终凝时间延长,强度逐渐降低,耐水性也逐渐降低,但硫酸盐侵蚀性能较好。在微观形态上表现为:石灰石粉的加入使胶凝相更为分散,生长出大量细长的晶体;清水浸泡时生成了大量大孔隙,硫酸盐腐蚀时生成片状晶体;但掺量即使达到40%,镁水泥的强度一样可以接近普通硅酸盐水泥的2倍。将石灰石粉大量取代轻烧粉加入氯氧镁水泥中作为建筑材料使用,是大量利用石灰石粉可供选择的良好途径。
[Abstract]:In order to make rational use of limestone powder, which is the by-product of producing limestone aggregate, and to develop green building materials, the initial setting time, final setting time and strength of magnesium oxychloride cement with different content of limestone powder were studied. The effects of water resistance and sulphate corrosion resistance on the microstructure of magnesium oxychloride cement were observed after the addition of limestone powder. The results showed that with the increase of limestone content, the initial setting time and final setting time of magnesium cement were prolonged, the strength and water resistance were gradually decreased, but the sulfate erosion performance was better. The microcosmic morphology is as follows: the addition of limestone powder makes the gelling phase more dispersed and grows a large number of slender crystals, while the water soaks into a large number of macropores, and the sulfate corrosion results in the formation of flake crystals. But even if the content of magnesium cement reaches 40, the strength of magnesium cement can be as close as that of ordinary Portland cement. It is a good way to use limestone powder to replace light burning powder and add magnesium oxychloride cement as building material to make a great deal of use of limestone powder.
【作者单位】：长安大学公路学院;长安大学交通铺面材料教育部工程研究中心;榆林市建设工程质量安全监督中心站;
【基金】：国家自然科学基金(51308062) 中国博士后科学基金(2013M540726) 中央高校基本科研业务资金(2014G1311084) 西部建筑科技国家重点实验室(筹)开放课题青海省交通科技项目(2013-04)
【分类号】：TQ172.1

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