Study on preparation of high dense and toughened hydraulic concrete and its properties

被引：0
|
作者：
Tang X. [1 ,2 ]
He Q. [1 ]
Zhou Y. [2 ]
Zhang C. [2 ]
机构：
[1] South China University of Technology, School of Civil Engineering and Transportation, Guangzhou
[2] The State key laboratory of Hydroscience and Engineering of China, Tsinghua University, Beijing
来源：
Shuili Xuebao/Journal of Hydraulic Engineering | 2018年 / 49卷 / 12期
关键词：
High dense; Hydraulic concrete; Performance test; Preparation; Toughened;
D O I：
10.13243/j.cnki.slxb.20180540
中图分类号：
学科分类号：
摘要：
Aiming to obtain the concrete with satisfactory volume stability and anti-permeability, the micro-performance of cement-based materials were analyzed to design the rheological property of slurry by mixing appropriate chemical admixtures. The effect of the dispersion, air entrainment, coagulation of chemical admixtures and curing system on filling capacity of slurry and rate of setting were investigated to optimize the particle packing and workability of slurry by particle accumulation algorithm. The toughness and shrinkage strain were improved by adding steel fiber. Meanwhile, a series of experimental tests were carried out to estimate the basic mechanical characteristic, durability and volume stability on the high-dense and toughened hydraulic concrete(HDTHC). The results show that the compressive strength and splitting tensile strength of HDTHC reached 109.66MPa and 17.60MPa respectively. Its electric flux of 6h was not exceeding 130C, the carbonation depth of 28d was 2mm, the loss rate of freeze-thaw quality was no more than 0.2%, the strength loss rate was no more than 2%, as well as the dry shrinkage deformation of 42d was no more than 0.17‰. HDTHC showed good mechanical properties, excellent durability and volume stability. © 2018, China Water Power Press. All right reserved.
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页码：1523 / 1531
页数：8
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