摘要
通过对云母粉进行疏水改性处理制备出一种改性粉体,采用该改性粉体制备出具有疏水性能的砂浆,对该砂浆的吸水率、失水率、干湿循环硫酸盐侵蚀条件下的外观、抗压强度、水溶性SO_(4)^(2-)的分布进行了研究,并进行了机理分析。结果表明:所制备的改性粉体能降低砂浆的吸水率和失水率,改善硫酸盐侵蚀条件下砂浆试件的表面剥落、开裂和强度损失。
A modified powder was prepared by water-repellent modifying mica powder,and a mortar with water-repellent properties was prepared by using the modified powder.The water absorption,water loss,and sulfate resistance of the mortar with and without modified powder in the dry-wet cycling environment were investigated.The results show that the modified powder can reduce the water absorption and desorption rate of mortar,and can improve the surface spalling,cracking and strength reduction during sulfate attack.
作者
顾宁
杨静
王兴熙
杨林
GU Ning;YANG Jing;WANG Xing-xi;YANG Lin(Ningxia Water Conservancy Engineering Construction Center,Yinchuan 750000,China;Zhengzhou Urban Planning Design and Survey Research Institute,Zhengzhou 450000,China;Jianghe Engineerig Inspection and Testing Co.,Ltd.,Zhengzhou 450000,China;School of Hydraulic Science and Engineering,Zhengzhou University,Zhengzhou450000,China)
出处
《混凝土与水泥制品》
2021年第9期10-15,38,共7页
China Concrete and Cement Products
基金
国家重点研发计划项目(2019YFC1509905)
国家自然科学基金项目(51809085)。
关键词
改性
云母粉
砂浆
疏水
硫酸盐侵蚀
干湿循环
Modify
Mica powder
Mortar
Water-repellent
Sodium sulfate attack
Dry-wet cycling
