煅烧沸石粉对硫氧镁水泥耐水性的影响
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 化学工程与技术学院, 辽宁 鞍山 114051;3.上海交通大学 船舶海洋与建筑工程学院, 上海 200240;4.辽宁科技大学 科大峰驰镁建材研究院, 辽宁 鞍山 114051

作者简介:

周俊峰(1998—), 男, 辽宁葫芦岛人, 辽宁科技大学硕士生. E-mail: 1662608176@qq.com

通讯作者:

关 岩(1971—), 女, 辽宁鞍山人, 辽宁科技大学副教授, 硕士生导师, 硕士. E-mail: 15841293909@163.com

中图分类号:

TQ172.1

基金项目:

辽宁省教育厅项目(LJKFZ20220193);“十三五”国家重点研发计划子课题(2020YFC1909304)


Effect of Calcined Zeolite Powder on Water Resistance of Magnesium Oxysulfate Cement
Author:
Affiliation:

1.School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China;2.School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China;3.School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;4.Reseach Institution of Keda Fengchi Magnesium Building Materials, University of Science and Technology Liaoning,Anshan 114051, China

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • | |
  • 文章评论
    摘要:

    为提高硫氧镁水泥(MOSC)的耐水性,以煅烧沸石粉为掺合料制备MOSC,研究了煅烧前后沸石粉对MOSC凝结时间、力学性能、耐水性、相组成、微观形貌和孔结构的影响.结果表明:掺入煅烧沸石粉提高了MOSC的力学性能,且煅烧前后的沸石粉均可在MOSC体系中反应形成水化硅酸镁(M-S-H)凝胶,降低了MOSC的总孔隙率,提高了MOSC的耐水性,但掺入煅烧沸石粉的MOSC耐水性更优;MOSC中掺入20%经200 ℃煅烧、升温速率15 ℃/min处理的沸石粉后,MOSC的耐水性最优,其28 d抗压和抗折强度保留系数分别可达0.91、0.95.

    Abstract:

    To improve the water resistance of magnesium oxysulfate cement (MOSC), MOSC were prepared using calcined zeolite powder as an admixture. The effects of calcined zeolite powder before and after calcination on the setting time, mechanical properties, water resistance, phase composition, microstructure, and pore structure of MOSC were investigated. The results indicate that the mechanical properties of MOSC are improved by adding calcined zeolite powder, and the hydrated magnesium silicate gel can be formed by the reaction of zeolite powder before and after calcination in the MOSC system, which reduces the total porosity of MOSC and improves the water resistance of MOSC, but the water resistance of MOSC mixed with calcined zeolite powder is better. After adding 20% zeolite powder that has been calcined at 200 ℃ and treated at a heating rate of 15 ℃/min, the water resistance of MOSC is optimal. The retention coefficients of compressive and flexural strength at 28 days can reach 0.91 and 0.95, respectively.

    表 2 煅烧前后ZE的比表面积、活性指数和晶粒尺寸Table 2 Specific surface area, activity index and crystal size of ZE before and after calcination
    表 3 MOSC的孔结构Table 3 Pore structure of MOSC
    图1 LBM和ZE的激光粒度分布曲线Fig.1 Laser particle size distribution of LBM and ZE
    图2 煅烧前后ZE的微观形貌Fig.2 Microstructure of ZE before and after calcination
    图3 MOSC的凝结时间和流动度Fig.3 Setting time and fluidity of MOSC
    图4 MOSC的抗压强度和抗折强度Fig.4 Compressive strength and flexural strength of MOSC
    图5 浸水前后MOSC的抗压强度、抗折强度及保留系数Fig.5 Compressive strength, flexural strength and retention factor of MOSC before and after soaking in water
    图6 浸水前后MOSC的膨胀率Fig.6 Expansion ratio of MOSC before and after soaking in water
    图7 MOSC的FTIR光谱Fig.7 FTIR spectra of MOSC
    图8 浸水前后MOSC的XRD图谱、矿物相含量和水化产物的晶粒尺寸Fig.8 XRD pattern, proportion of mineral phases and grain size of hydration product of MOSC before and after soaking in water
    图9 MOSC的微观形貌Fig.9 Microstructures of MOSC
    图10 试样T-200-15的SEM-EDS分析Fig.10 SEM-EDS analysis of sample T-200-15
    图11 MOSC的SEM-EDS分析Fig.11 SEM-EDS analysis of MOSC
    表 1 LBM和ZE的化学组成Table 1 Chemical compositions(by mass) of LBM and ZE
    参考文献
    相似文献
    引证文献
引用本文

周俊峰,陈啸洋,陈兵,毕万利,关岩.煅烧沸石粉对硫氧镁水泥耐水性的影响[J].建筑材料学报,2024,27(3):197-205

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2023-04-25
  • 最后修改日期:2023-06-06
  • 在线发布日期: 2024-04-07
文章二维码