流变性对透水混凝土中浆体分布的影响
Influence of Rheology on the Distribution of Paste in Pervious Concrete
李凯 1金宇 1丰树东 1叶焕2
作者信息
- 1. 安徽水利开发有限公司,安徽蚌埠 233000
- 2. 安徽科技学院建筑学院,安徽蚌埠 233000
- 折叠
摘要
为了减少透水混凝土中浆体的流淌沉降现象,改善透水混凝土的稳定性和透水性,研究了流变性对浆体附着能力和透水混凝土透水性能的影响.结果表明:浆体在骨料表面的附着能力随骨料表面积、浆体高剪黏度的增大而增大,但与屈服应力的关联性较弱;浆骨比为30％时透水混凝土的透水系数范围为0～9.6 mm/s,饱和附着量小于浆骨比的透水混凝土普遍有较小的透水系数,甚至完全失去透水性;水胶比0.25并适当掺加减水剂和增稠剂的透水混凝土比水胶比0.35及以上的透水混凝土具有更好的透水性能.
Abstract
To reduce the sagging of paste in pervious concrete and improve the stability and water permeability,the effect of rheology of paste on the adhesion ability of paste and pervious performance of pervious concrete was studied.The results show that the adhesion ability of paste on aggregate surface increase with the surface area of aggregate and high shear viscosity of paste,but is weak correlation with yield stress.The permeability coefficient of pervious concrete ranged from 0 to 9.6mm/s when the paste to bone ratio was 30％,and the samples with a sat-urated adhesion less than 30％tend to have a small permeability coefficient,or even completely loses water per-meability.The pervious concretes prepared with a water binder ratio of 0.25 and appropriate amount of water-re-ducing admixture and thickener had better pervious performance than the pervious concrete whose water binder ratio was 0.35 or larger.
关键词
透水混凝土/流变性/海绵城市/绿色混凝土/透水性Key words
pervious concrete/pore structure/sponge cities/green concrete/pervious performance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据