摘要
针对马来西亚沿海地区粉煤灰较少且质量不稳定、白天气温平均30℃以及沿海建筑物抗氯离子渗透需求高等技术难点,开展超高掺量单掺矿粉体系配合比设计实验,确定3组备选配合比。通过对备选配合比进行相关力学性能、流变性能及耐久性能实验,优选单掺65%矿粉胶凝材料配合比,其坍落度为190 mm,初、终凝时间分别为10.0 h和12.5 h,7、28 d抗压强度分别为37.5、49.8 MPa,水化温升峰值为30.1℃,干燥收缩率为221.5×10-6,28 d电通量为476 C,该配合比施工效果好,满足强度、坍落度、抗裂及抗渗性能要求。
Due to the lack of fly ash and the unstable quality in the coastal areas of Malaysia,the average temperature during the day is 30 ℃ and the high technical difficulties in resisting chloride penetration of coastal buildings,a design experiment of mixing ratio of ultra-high mixing amount and single mixing mineral powder system was carried out to determine 3 groups of alter-native mixing ratio. Through the mechanical properties,rheological property and durability test of the alternative mix ratio,the mix ratio of the cementing material mixed with 65% mineral powder is selected as the application mix ratio. The slump is 190 mm,the initial and final setting times are 10.0 h and 12.5 h,respectively, the 7 d and 28 d strengths are 37.5 MPa and 49.8 MPa,respectively,the peak hydration temperature rise is 30.1 ℃,the drying shrinkage rate is 221.5×10-6,28 d electric flux is 476 C. The mix ratio has good construction effect and meets the requirements of strength,slump,crack resistance and permeability resistance.
作者
余昆
雷小焕
孙礼程
熊龙
李兴
邢菊香
YU Kun;LEI Xiaohuan;SUN Licheng;XIONG Long;LI Xing;XING Juxiang(China Construction Ready Mixed Concrete Co.Ltd.,Wuhan 430070,China)
出处
《新型建筑材料》
北大核心
2020年第9期151-154,共4页
New Building Materials
关键词
热带沿海
大体积转换层
混凝土
单掺矿粉
耐久性
coastal areas
large volume transfer layer
concrete
single mixing mineral powder
durability
