摘要
利用高炉矿粉作为透水混凝土的胶凝材料,使用氢氧化钠及水玻璃作为碱激发液来激发高炉矿粉体系,制备了矿粉基地质聚合物透水混凝土。探讨了碱激发剂模数对使用高炉矿粉作为主要胶凝材料的地质聚合物透水混凝土力学性能、透水性能及孔隙率的影响;其中对于透水混凝土性能方面的研究主要涉及一定龄期下的抗压强度、抗折强度、透水速率。研究结果表明,矿粉基地质聚合物透水混凝土的28 d抗压强度随着模数的增大呈现先增大后减小的趋势,同时矿粉基地质聚合物透水混凝土的总孔隙率不断减小,相应的透水系数也在不断减小。其原因是水玻璃对矿粉地聚物体系的解凝作用导致的浆体流动度增加,进而降低了孔隙率。
Geopolymer pervious concrete was prepared through alkali-activating GGBS by activator of sodium hydroxide and waterglass.The effect of modulus of activator on the mechanical properties,water-permeating coefficient and porosity of geopolymer pervious concrete was evaluated and discussed.The results indicate that the compressive strength of geopolymer pervious concrete at 28 d first increased then decreased with the increase of modulus of activator.The total porosity and water-permeating coefficient decreased with the increase of modulus of activator.The reason is that the porosity decreased by the increase of fluidity of fresh concrete due to the decondensation of GGBS by waterglass.
作者
徐庆
李秋
陈伟
陈潇
刘志林
马浩森
XU Qing;LI Qiu;CHEN Wei;CHEN Xiao;LIU Zhi-lin;MA Hao-sen(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2018年第11期3575-3580,3586,共7页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(51611530545)
关键词
模数
胶凝材料
透水混凝土
孔隙率
连通孔隙
流动性
modulus
cementitious materials
pervious concrete
porosity
connected pore
fluidity
