C70微珠自密实混凝土性能研究及作用机理分析  

C70 Beads self-compacting concrete performance and mechanism

作　　者：袁启涛[1] 唐玉超 罗作球 杨海涛 史相东 

机构地区：[1]天津大学,天津300000 [2]中建商品混凝土天津有限公司,天津300000

出　　处：《混凝土》2014年第11期118-123,131,共7页Concrete

摘　　要：利用新型特种超细矿物掺合料微珠制备出性能良好的超低水泥用量C70自密实混凝土,水泥用量仅为340 kg/m3,胶凝材料总量为570 kg/m3。微珠显著改善了C70自密实混凝土自密实性能,提高了混凝土的抗压强度,降低了水泥的水化温升,提高了混凝土的耐久性能。经XRD与SEM测试可知,微珠特有的化学成分与水泥反应产生了新的矿物相或者使其含量增加,增加了结构的致密性。Ultra-low cement content C70 self-compacting concrete with good performance was prepared by use of ultra-fine mineral ad- mixtures new special beads.Cement consumption was only 340 kg/m3, total cementitious materials 570 kg/m3.Beads significantly improve self-compacting properties,increase the compressive strength,reduce the cement hydration temperature, enhance the durability of C70 self-compacting concrete.XRD and SEM showed that, a unique chemical composition of microbeads produce new mineral phase or in- crease the content by reacting with cement, that increased the density of the structure.

关 键 词：微珠 自密实混凝土 水化温升 自收缩 机理 

分 类 号：TU528.53[建筑科学—建筑技术科学]