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高吸附性机制砂石粉对防水砂浆 性能的影响研究
作者：宋少民，周浩
（北京建筑大学，建筑结构与环境修复功能材料北京市重点实验室，北京 100044）
摘要：为了明确高吸附性机制砂石粉在防水砂浆中应用的技术可行性，采用片麻岩机制砂及其石粉制备防水砂浆，研究了石粉部分替代粉煤灰后，对其和易性、强度、体积稳定性的影响。结果表明：片麻岩机制砂石粉部分替代粉煤灰可降低防水砂浆2 h稠度损失率并提高保水性，对防水砂浆的抗压强度影响不大，在一定程度上可降低防水砂浆的收缩和开裂敏感性。
关键词：高吸附性机制砂；防水砂浆；石粉；和易性；强度；体积稳定性
中图分类号：TU57+8.1 文献标识码：A 文章编号：1001-702X（2020）01-0112-05
Study on the effect of high adsorption stone powder on the performance of waterproof mortar
SONG Shaomin，ZHOU Hao
（Beijing University of Civil Engineering and Architecture，Beijing Key Laboratory of Advanced Functional Materials for Building and Environment，Beijing 100044，China）
Abstract：In order to clarify the technical feasibility of the application of high adsorbability manufactured sand powder in waterproof mortar，this paper uses gneiss manufactured sand and its stone powder to prepare waterproof mortar，and studies the workability，strength，and volume stability of the stone powder after replacing the fly ash. The results show that partial replacement of fly ash by gneiss mechanism sandstone can reduce the 2 h consistency loss rate of water-repellent mortar and improve water retention，which has little effect on the compressive strength of waterproof mortar，and can reduce the shrinkage and cracking sensitivity of waterproof mortar to some extent.
Key words：high adsorbability manufactured sand，waterproof mortar，stone powder，workability，strength，volume stability