Experimental study of the interfacial transition zone (ITZ) of model rock-filled concrete (RFC)
Experimental study of the interfacial transition zone (ITZ) of model rock-filled concrete (RFC)
复制标题
模型充石混凝土（RFC）界面过渡区（ITZ）的试验研究
DOI：
10.1016/j.cemconcomp.2014.09.002
复制
发表时间：
2015
影响因子：
10.5
通讯作者：
Shah Surendra P.
中科院分区：
文献类型：
--
作者：
Xie Yuetao;Corr David J.;Jin Feng;Zhou Hu;Shah Surendra P.
填石混凝土（RFC）是一种新型混凝土，主要用于大规模混凝土施工，其浇筑工艺与传统混凝土不同：首先将大块岩石堆入模板，然后浇筑自密实混凝土（SCC），由于其高流动性，自密实混凝土在重力作用下填充岩石骨架的空隙。RFC的关键问题之一在于SCC和岩石之间的大界面。本文通过模拟岩石和水泥浆体组成的室内模型RFC来模拟施工过程中的RFC。研究了不同因素（骨料粒径、水泥浆流变性等）对混凝土强度的影响。采用背散射电子（BSE）和纳米压痕技术研究了RFC模型水泥浆体与集料之间界面过渡区（ITZ）的性质。此外，通过比较BSE和纳米压痕在相同区域的结果，孔隙率和弹性模量之间的关系被发现符合经验公式，桥梁的微观结构与混凝土的力学性能。
Rock-filled concrete (RFC), a new type of concrete that was developed mainly for large scale concrete construction, has a different casting process than conventional concrete: large rocks are piled into the formwork first, then self-compacting concrete (SCC) is poured in and fill the voids of the rock skeleton under gravity due to its high flowability. One of the key issues about RFC lies in its large interfaces between the SCC and rocks. In this paper, laboratory-scale model RFC consisting of coarse aggregates (simulating rocks) and cement grout (simulating SCC) was cast to simulate RFC in construction. The effects of different factors (aggregate size, rheology of cement grout, etc.) on the properties of the interfacial transition zone (ITZ) between cement paste and aggregates of model RFC were investigated using Backscatter Electron (BSE) and nanoindentation techniques. Furthermore, by comparing the results of BSE and nanoindentation at identical regions, the relationship between porosity and elastic modulus was found to agree well with empirical formulas, bridging the microstructure with the mechanical properties of concrete.
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影响因子：
11.4
作者：
Wang, Xiao Hui;Jacobsen, Stefan;Lein, Hilde Lea
通讯作者：
Lein, Hilde Lea
影响因子：
10.5
作者：
S. Diamond
通讯作者：
S. Diamond
DOI：
10.1023/b:ints.0000042339.92990.4c
发表时间：
2004-10-01
期刊：
INTERFACE SCIENCE
影响因子：
--
作者：
Scrivener, KL;Crumbie, AK;Laugesen, P
通讯作者：
Laugesen, P
DOI：
10.21985/n29m9x
发表时间：
2008
期刊：
--
影响因子：
--
作者：
P. Mondal
通讯作者：
P. Mondal
影响因子：
11.4
作者：
G. Prokopski;B. Langier
通讯作者：
G. Prokopski;B. Langier