| 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. |
| 关键词: 水泥石 热膨胀系数 偏高岭土 玻璃粉 石灰石粉 |
| DOI：10.3969/j.issn.1007-9629.2022.08.002 |
| 分类号:TU528.01 |
| 基金项目:国家国际科技合作专项项目（ISTCP 2014DFR81000） |
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| Effects of Metakaolin， Glass Powder and Limestone Filler on Microstructure and Properties of Cement Paste |
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DU Yuanbo, GE Yong
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School of Transportation Science and Engineering， Harbin Institute of Technology， Harbin 150090， China
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| 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. |
| Key words: cement paste thermal expansion coefficient metakaolin glass powder limestone powder |
