碱激发矿渣-赤泥新型低碳透水混凝土性能研究
Study on Properties of New Low-Carbon Pervious Concrete with Alkali-Activated Slag-Red Mud
吴敏 1王晨 1王安辉 2段伟 1张洁雅 1董晓强1
作者信息
- 1. 太原理工大学 土木工程学院,山西 太原 030024
- 2. 中建安装集团有限公司,江苏 南京 210023
- 折叠
摘要
以粒化高炉矿渣与拜耳法赤泥两种工业固废作为胶凝材料,硅酸钠溶液作为碱激发剂,石灰岩碎石作为粗骨料,制备透水混凝土,研究了设计孔隙率、水胶比与骨料粒径对透水混凝土强度与透水性能的影响.结果表明:随设计孔隙率增大,试样的强度逐渐减小,但透水性能逐渐增强.最优水胶比受设计孔隙率和骨料粒径的影响,当透水混凝土设计孔隙率为 15%、骨料粒径为4.75～9.50 mm时,最优水胶比为 0.36,其强度较高且具有良好的透水性能.碱矿渣-赤泥透水混凝土的力学与透水性能均优于水泥透水混凝土,符合低碳绿色的发展理念.
Abstract
Pervious concrete was prepared with two industrial solid wastes of granulated blast-furnace slag and Bayer red mud as cementitious materials,sodium silicate solution as alkali activator,and limestone gravel as coarse aggregate.The effects of design porosity,water-binder ratio and aggregate size on the strength and permeability of pervious concrete were studied respectively.The optimal water-binder ratio is in-fluenced by the design porosity and aggregate size.When the design porosity of pervious concrete is 15%and the aggregate size is 4.75-9.50 mm,the optimal water-binder ratio of 0.36 and it has a higher strength and has good water permeability.The mechanics and permeability per-formance of alkali-activated slag-red mud pervious concrete are better than those of cement pervious concrete,which is in line with the devel-opment concept of low carbon and green.
关键词
透水混凝土/赤泥/矿渣/设计孔隙率/水胶比/骨料粒径Key words
pervious concrete/red mud/slag/design porosity/water-binder ratio/aggregate size引用本文复制引用
基金项目
国家自然科学基金(52108332)
江苏省自然科学基金(BK20210051)
南京市建设系统科技计划(Ks2153)
山西省住建厅科技项目(2021)()
出版年
2024
国家科技期刊平台
NSTL
万方数据