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首页 > 过刊浏览>2022年第25卷第8期 >773-780. DOI:10.3969/j.issn.1007-9629.2022.08.002
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偏高岭土、玻璃粉和石灰石粉对水泥石微观结构和性能的影响
作者:
作者单位:

哈尔滨工业大学 交通科学与工程学院，黑龙江 哈尔滨 150090

作者简介:

杜渊博（1987—），男，陕西宝鸡人，哈尔滨工业大学博士生. E-mail： 915439482@qq.com

通讯作者:

葛 勇（1962—），男，陕西榆林人，哈尔滨工业大学教授，博士生导师，博士. E-mail： geyong@hit.edu.cn

中图分类号:

TU528.01

基金项目:

国家国际科技合作专项项目（ISTCP 2014DFR81000）


Effects of Metakaolin， Glass Powder and Limestone Filler on Microstructure and Properties of Cement Paste
Author:
Affiliation:

School of Transportation Science and Engineering， Harbin Institute of Technology， Harbin 150090， China

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    摘要:

    研究了偏高岭土、玻璃粉和石灰石粉对水泥石强度和热膨胀系数的影响.并采用热重分析仪、压汞仪和扫描电镜分析了不同水泥石的水化产物、孔结构和微观形貌.结果表明：偏高岭土、玻璃粉和石灰石粉的掺入可以降低水泥石的热膨胀系数，并且降低程度随着其掺量的增大而增大；掺加偏高岭土的水泥石中水化产物增多，孔隙率降低，微观结构致密，抗压强度增大，热膨胀系数减小；掺加玻璃粉的水泥石中水化产物减少，孔隙率增大，强度和热膨胀系数的降低幅度较大；掺加石灰石粉的水泥石强度和热膨胀系数的降低幅度最大.

    Abstract:

    The effects of metakaolin， glass powder and limestone powder on the strength and thermal expansion coefficient of cement paste were studied. The hydration products， pore structure and microstructure of cement paste were also studied by thermogravimetric analyzer， mercury intrusion porosimetry and scanning electron microscope. The results show that the thermal expansion coefficient of cement paste decreases with the increase of content of metakaolin， glass powder or limestone powder.The addition of metakaolin can increase the hydration product， decrease the porosity， improve the microstructure， increase the compressive strength and decrease the thermal expansion coefficient of cement paste； the addition of glass powder can decrease the hydration product， increase the porosity， and greatly reduce the strength and thermal expansion coefficient of cement paste； the strength and thermal expansion coefficient of cement paste with limestone powder decrease the most.

    表 1 原材料的化学组成Table 1 Chemical composition of raw materials
    图1 原材料的粒径分布Fig.1 Particle size distribution of raw materials
    图2 水泥石的热膨胀系数Fig.2 Thermal expansion coefficient of cement pastes
    图3 水泥石的抗压强度和抗折强度Fig.3 Compressive strength and flexural strength of cement pastes
    图4 水泥石的TG-DSC曲线Fig.4 TG-DSC curves of cement pastes
    图5 水泥石中化学结合水和Ca（OH）2的含量Fig.5 Contents of bound water and Ca（OH）2 in cement pastes
    图6 水泥石的孔径分布曲线Fig.6 Pore size distribution curves of cement pastes
    图7 水泥石的孔隙率Fig.7 Porosity of cement pastes
    图8 水泥石的SEM照片Fig.8 SEM images of cement pastes
    表 2 水泥石的配合比Table 2 Mix proportions of cement pastes
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杜渊博,葛勇.偏高岭土、玻璃粉和石灰石粉对水泥石微观结构和性能的影响[J].建筑材料学报,2022,25(8):773-780

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  • 收稿日期:2021-07-05
  • 最后修改日期:2021-09-06
  • 在线发布日期: 2023-09-15
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