掺生物胶自密实混凝土流动性的试验研究  

Fluidity of self-compacting concrete with biopolymers

作　　者：苏胜[1] 

机构地区：[1]华北科技学院建工系,河北三河065201

出　　处：《混凝土》2008年第3期75-76,83,共3页Concrete

摘　　要：增稠剂已成为自密实混凝土(SCC)中的重要组分。采用两种生物胶,即黄原胶和文莱胶,作为混凝土增稠剂,对掺有两种增稠剂的自密实混凝土进行流动性试验研究,结果表明:黄原胶和文莱胶可改善新拌混凝土的流动性,黄原胶尤为明显;随黄原胶和文莱胶掺量的增加,新拌混凝土的初始流动性逐渐降低;掺有较高掺量(0.03%～0.05%)黄原胶的新拌混凝土初始流动性较小,但随时间的延长流动性逐渐增加;而文莱胶(0.03%～0.05%)则随时间延长,流动性变化不大或减小。Viscosity agent is necessary in self-compacting concrete （ SCC ）.Xanthogum and welan gum were applied in SCC as viscosity agent. And it is found that both of them can improve fluidity of SCC,particularly xanthogum;with amount increasing,both of them decreased initial fluidity of fresh concrete ;with high dosage （0.03%-0.05%） of former, fluidity increased with time elapsing, although low initial fluidity; however, as to welan gum, there is decrease or a little loss in fluidity.

关 键 词：自密实混凝土 文莱胶 黄原胶 增稠剂 工作性 

分 类 号：TU528.041[建筑科学—建筑技术科学]