花岗岩石粉对硫氧镁水泥耐压强度和耐水性的影响
作者:
作者单位:

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

作者简介:

靳凯戎(1994—),男,河南平顶山人,辽宁科技大学硕士生.E-mail:yefeng981904494@163.com

通讯作者:

毕万利(1963—),男,辽宁鞍山人,辽宁科技大学教授,硕士生导师,硕士.E-mail:asbwl@126.com

中图分类号:

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)


Effect of Granite Powder on Compressive Strength and Water Resistance of Magnesium Oxysulfate Cement
Author:
Affiliation:

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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    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.

    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.

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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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  • 收稿日期:2021-06-01
  • 最后修改日期:2021-08-08
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  • 在线发布日期: 2023-09-15
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