Application of depth-sensing microindentation testing to study of interfacial transition zone in reinforced concrete
Application of depth-sensing microindentation testing to study of interfacial transition zone in reinforced concrete
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DOI：
10.1016/s0008-8846(00)00322-7
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发表时间：
2000-08
影响因子：
11.4
通讯作者：
Wenzhong Zhu;Peter J.M Bartos
中科院分区：
文献类型：
--
作者：
Wenzhong Zhu;Peter J.M Bartos
采用深度传感微压痕技术，成功地研究了实际钢筋混凝土中钢筋周围界面过渡区的弹性模量和微观强度。研究中使用了一种普通混凝土混合料和一种特殊的自密实混凝土(SCC)混合料，这两种混合料都是商业生产的。结果表明，水平钢筋底部的界面弹性模量值和微区强度明显低于顶部。在距实际界面10-30μm的距离内，差异尤其明显。与传统的维氏显微硬度试验相比，该方法具有明显的优势。
A new method, the depth-sensing microindentation technique, was successfully used to study the elastic modulus and micro-strength of the interfacial transition zone (ITZ) around steel reinforcement in practical reinforced concrete. A normal concrete mix and a special self-compacting concrete (SCC) mix, both produced commercially, were used in the study. It was found that the elastic modulus and microstrength in the ITZ were significantly lower on the bottom side of a horizontal steel reinforcement than on the top side. The difference was particularly pronounced in the 10–30 μm distance from the actual interface. The method showed clear advantages over the conventional Vickers microhardness test.