引用本文: | 靳凯戎,许星星,陈啸洋,毕万利,李孟强.花岗岩石粉对硫氧镁水泥耐压强度和耐水性的影响[J].建筑材料学报,2022,25(8):767-772 |
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花岗岩石粉对硫氧镁水泥耐压强度和耐水性的影响 |
靳凯戎1,许星星1,陈啸洋2,毕万利1,3,李孟强4
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1.辽宁科技大学 材料与冶金学院,辽宁 鞍山 114051;2.辽宁科技大学 化工学院,辽宁 鞍山 114051;3.辽宁科技大学 科大峰驰镁建材研究院,辽宁 鞍山 114051;4.中国菱镁行业协会,北京 100049
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摘要: |
以花岗岩石粉(GP)为掺合料,研究了其对硫氧镁(MOS)水泥耐压强度和耐水性的影响.利用X射线衍射仪(XRD)、同步综合热分析仪、扫描电镜(SEM)、压汞仪(MIP)等研究了MOS水泥的组成、微观形貌及孔结构.结果表明:当GP掺量为30%时,MOS水泥的28 d抗压强度达到最大值,为74.1 MPa;当GP掺量为40%时,MOS水泥浸水6 d时的耐水软化系数达到最大值,为1.18;浸水溶液中Mg2+和SO42-![]() 的浓度随着MOS水泥耐水软化系数的提高而降低;掺加GP的MOS水泥浸水后,体系中生成的Mg(OH)2结晶程度更高,MOS水泥的耐水性得以改善. |
关键词: 硫氧镁水泥 花岗岩石粉 耐水性 微观结构 水化产物 |
DOI:10.3969/j.issn.1007-9629.2022.08.001 |
分类号:TU528.01 |
基金项目:辽宁科技大学服务地方经济发展项目(LKDFW201802);国家自然科学基金资助项目(51778101) |
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Effect of Granite Powder on Compressive Strength and Water Resistance of Magnesium Oxysulfate Cement |
JIN Kairong1, XU Xingxing1, CHEN Xiaoyang2, BI Wanli1,3, LI Mengqiang4
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1.College of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China;2.College of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China;3.Research Institution of KedaFengchi Magnesium Building Materials, University of Science and Technology Liaoning, Anshan 114051, China;4.China Magnesite& Material Association, Beijing 100049, China
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Abstract: |
The effect of granite powder(GP) as a mixed material on the compressive strength and water resistance of magnesium oxysulfate (MOS)cement was investigated.The composition, microstructure, and pore structure of modified MOS cement were characterized by mercury porosimeter(MIP), X-ray diffraction(XRD), simultaneous comprehensive thermal analyzer, and scanning electron microscope(SEM). The result shows that when the granite powder content is 30% and 40%, the 28 d compressive strength and the 6 d water resistance softening coefficient of MOS can reach the maximum values, to be 74.1 MPa and 1.18, respectively. The concentration of the Mg2+ and SO42-![]() in the solution decreases with the increase of MOS water resistance softening coefficient. After soaking in water, the Mg(OH)2 generated with a higher degree of crystallinity in MOS cement containing GP, and this can conductive to the water resistance of MOS cement to a certain extent. |
Key words: magnesium oxysulfate(MOS) cement granite powder(GP) water resistance microstructure hydration product |
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