Permeability of roller compacted concrete
Permeability of roller compacted concrete
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DOI：
10.1061/(asce)0899-1561(1992)4:1(27
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发表时间：
1992-02
影响因子：
3.2
通讯作者：
N. Banthia;M. Pigeon;J. Marchand;J. Boisvert
中科院分区：
文献类型：
--
作者：
N. Banthia;M. Pigeon;J. Marchand;J. Boisvert
透水率测量是在平均厚度为 160 毫米的碾压混凝土路面上获得的直径 50 毫米、长 100 毫米的带芯圆柱体上进行的。使用三轴渗透池。研究了水灰比、硅粉添加量、细水泥的使用、养护技术等对渗透系数的影响。发现碾压混凝土比传统配比和浇筑混凝土的渗透性要高得多，并且比传统大体积混凝土的渗透性稍高。使用硅粉和更细的水泥似乎在一定程度上降低了渗透系数。然而，固化方法并没有产生任何明显的差异。在显微镜下观察时，发现碾压混凝土具有许多相互连接的压实空隙、空心骨料-浆体边界以及多孔且不发达的界面。
Water‐permeability measurements were made on 50 mm diameter and 100 mm long cored cylinders obtained from a roller compacted concrete pavement that was 160 mm in average thickness. A triaxial permeability cell was used. The effect of water‐cement ratio, silica fume addition, use of a finer cement, curing technique, etc. on coefficients of permeability were investigated. Roller compacted concrete was found to be considerably more permeable than conventionally proportioned and placed concrete and somewhat more permeable than conventional mass concrete. The use of silica fume and finer cement appeared to reduce the coefficient of permeability to some extent. However, the method of curing did not make any appreciable difference. When observed under a microscope, roller compacted concrete was found to have a number of interconnected compaction voids, hollow aggregate‐paste boundaries, and interfaces that were porous and undeveloped.