掺生物胶自密实混凝土强度的试验研究  

Strength of self-compacting concrete with biopolymers

作　　者：苏胜[1,2] 左彦峰[3] 王栋民[1] 

机构地区：[1]中国矿业大学混凝土与环境材料研究所,北京100083 [2]华北科技学院土木系,河北三河101601 [3]中国建筑科学研究院,北京100013

出　　处：《混凝土》2009年第7期15-16,共2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增稠剂,在对工作性研究的基础上,对掺有两种增稠剂的自密实混凝土进行强度试验研究。试验结果表明:掺生物胶均会造成自密实混凝土早期强度下降;掺量为0.01%的黄原胶能够降低自密实混凝土的28d强度,而掺量为0.01%的文莱胶的自密实混凝土的28d强度基本未变;掺量为0.03%的生物胶对自密实混凝土各龄期强度影响较小;黄原胶随掺量的增加,各龄期强度逐渐增大,而文莱胶不符合此规律。Viscosity reagent is necessary in self-compacting concrete （SCC）.The xantho gum and welan gum were applied in SCC as viscosity reagent.And after the study of the workability, it is found that both of them can descend the early age strength of SCC.When the proportion of the xantho gum is 0.01%, the strength of SCC on 28 days decreases.And when the proportion of the welan gum is 0.01%, the strength of SCC on 28 days does not change evidently.When the proportion of two-gum is 0.03%,the strength in each age of SCC could hardly changed.Along with the increasing of the xantho gum proportion, the strength in each age of SCC increases.While welan gum fails short of this rule.

关 键 词：自密实混凝土 文莱胶 黄原胶 增稠剂 强度 

分 类 号：TU528.53[建筑科学—建筑技术科学]