- 目录
- 建筑石膏与胶凝材料
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全取代风积沙砂浆抗冻性能研究
作者：叶显1，郭志华2，姚婷芮3
（1.武汉三源特种建材有限责任公司，湖北 武汉 430083；2.兰新铁路甘青有限责任公司，甘肃 兰州 730000；
3.甘肃铁鹰建筑质量检测有限公司，甘肃 兰州 730000）
摘要：对全取代风积沙砂浆的抗冻性进行了测试，以冻融循环过程中试件的质量损失和强度损失为评价指标，探索了不同胶砂比、水胶比和粉煤灰掺量对风积沙砂浆抗冻性的影响。结果表明，胶砂比越高、水胶比越低，风积沙砂浆的抗冻性越好；粉煤灰掺量越高，低强度风积沙砂浆体系冻融循环过程中质量损失越大，但是在胶砂比较高的体系中，粉煤灰掺入能够有效减小砂浆在冻融循环过程中的强度损失。通过线性拟合，得到了冻融循环150~300次过程中风积沙砂浆试件的强度损失和水胶比、粉煤灰掺量之间的关系。
关键词：风积沙砂浆；抗冻性；全取代；线性关系
中图分类号：TU528.041 文献标识码：A 文章编号：1001-702X（2019）04-0034-04
Study on frost resistance of fully-replaced aeolian sand mortar
YE Xian1，GUO Zhihua2，YAO Tingrui3
（1.Sanyuan Special Building Materials Co. Ltd.，Wuhan 430083，China；
2.Ganqing Co. Ltd. of Lanxin Railway，Lanzhou 730000，China；
3.Gansu Tieying Building Quality Inspection Co. Ltd.，Lanzhou 730000，China）
Abstract：In this paper，the frost resistance of fully-replaced aeolian sand mortar was tested，and the quality loss and strength loss of the sample in the freeze-thaw cycle were used as evaluation indicators to explore the effect of different cement-sand ratio，water-cement ratio and fly ash content on frost resistance of aeolian sand mortar. The results show that the higher the cement-sand ratio and the lower the water-cement ratio，the better the frost resistance of the aeolian sand mortar. The higher the fly ash content，the greater the loss of mass during the freeze-thaw cycle of the low-strength aeolian sand mortar system，but the fly ash content can effectively reduce the loss of strength during freeze-thaw cycle in higher cement-sand ratio system. Through the linear fitting，the relationship between the strength loss of the aeolian sand mortar and the water-cement ratio and the fly ash content during the freeze-thaw cycle 150 to 300 times was obtained.
Key words：aeolian sand mortar，frost resistance，fully-replaced，linear relationship