摘要
本试验采用硅酸盐水泥、粉煤灰、S95矿粉和聚羧酸高效减水剂,通过单掺粉煤灰、粉煤灰及S95矿粉(1:1)复掺制备出不同胶凝材料体系的地铁衬砌混凝土,根据其服役环境,本文系统研究了不同胶凝材料体系及水胶比对地铁衬砌混凝土抗SO42-盐侵蚀性能的影响规律。经研究发现:采用大掺量矿物掺合料(50%)制备的高性能地铁衬砌混凝土的抗SO42-盐侵蚀等级均达到KS150,其中水胶比对混凝土抗硫酸盐侵蚀性能影响显著,经150次干湿循环,水胶比为0.36的混凝土耐蚀系数为97.71%,水胶比为0.28的耐蚀系数为108.11%。
The subway lining concrete with different cementitious materials system was prepared by the combination of silicate cement, fly ash, S95 ore powder and polycarboxylic acid. According to its service environment, In this paper, the effects of different cementitious material systems and water glue ratio on the corrosion resistance of subway concrete to SO42-salt are systematically studied. The results show that the SO42-salt corrosion resistance level of high performance subway lining concrete prepared with large amount of mineral admixture（50%） has reached KS150, and the hydroglue ratio has a significant effect on the concrete＇s sulfate corrosion resistance. After 150 dry and wet cycles, The corrosion resistance factor for concrete with a water glue ratio of 0.36 is 97.71 %, and the corrosion resistance factor with a water glue ratio of 0.28 is 108.11 %.
作者
杜辉
李秋义
DU Hui;LI Qiuyi(Qingdao Kingstream Holdings Group Co.,Itd.,Shandong Qingdao 266100,China;College of Architecture and Civil Engi.,Qingdao Agricultural Univ.,Shandong Qingdao 266109,China)
出处
《低温建筑技术》
2018年第9期6-8,共3页
Low Temperature Architecture Technology
基金
国家自然科学基金面上项目资助(51578297)
关键词
混凝土
矿物掺合料
硫酸盐侵蚀
耐蚀系数
concrete
mineral admixtures
sulfate erosion
corrosion resistance coefficient
