The interfacial transition zone (ITZ) between cement paste and aggregate in concrete
The interfacial transition zone (ITZ) between cement paste and aggregate in concrete
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DOI：
10.1023/b:ints.0000042339.92990.4c
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发表时间：
2004-10-01
期刊：
影响因子：
--
通讯作者：
Laugesen, P
中科院分区：
文献类型：
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作者：
Scrivener, KL;Crumbie, AK;Laugesen, P
本文描述了所谓的界面过渡区 - iTz-In混凝土。这是骨料颗粒周围的水泥糊的区域，这受到聚集体的存在扰动。它的起源在于水泥晶粒对较大的骨料的堆积，这导致该区域中较小的水泥颗粒的局部孔隙率增加和占主导地位。 ITZ是逐渐过渡的区域，是高度异质的，但是，可以通过分析抛光混凝土样品的大量反向散射电子图像来衡量平均微结构特征。这样的测量表明，在水合过程中离子的迁移最初会显着降低存在的孔隙率。
This paper describes the so called interfacial transition zone-ITZ-in concrete. This is the region of the cement paste around the aggregate particles, which is perturbed by the presence of the aggregate. Its origin lies in the packing of the cement grains against the much larger aggregate, which leads to a local increase in porosity and predominance of smaller cement particles in this region. The ITZ is region of gradual transition and is highly heterogeneous, nevertheless the average microstructural features may be measured by analysis of a large numbers of backscattered electron images of polished concrete samples. Such measurements show that the higher porosity present initially is significantly diminished by the migration of ions during hydration.