Experimentally informed fracture modelling of interfacial transition zone at micro-scale

被引：37

作者：

Zhang, Hongzhi ^{[1
]}

Gan, Yidong ^{[1
]}

Xu, Yading ^{[1
]}

Zhang, Shizhe ^{[1
]}

Schlangen, Erik ^{[1
]}

Savija, Branko ^{[1
]}

机构：

[1] Delft Univ Technol, Fac Civil Engn & Geosci, NL-2628 CN Delft, Netherlands

来源：

CEMENT & CONCRETE COMPOSITES | 2019年 / 104卷

关键词：

CEMENT PASTE INTERFACE; CONCRETE COMPOSITES; ELECTRICAL-CONDUCTIVITY; MECHANICAL-PROPERTIES; FAILURE BEHAVIOR; AGGREGATE SIZE; ITZ; SIMULATIONS; STRENGTH;

D O I：

10.1016/j.cemconcomp.2019.103383

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The aim of this work is to predict the micromechanical properties of interfacial transition zone (ITZ) by combining experimental and numerical approaches. In the experimental part, hardened cement paste (HCP) cantilevers (200 mu m x 100 mu m x 100 mu m) attached to a quartzite aggregate were fabricated and tested using microdicing saw and nanoindenter, respectively. In the modelling, comparable digital specimens were produced by the X-ray computed tomography (XCT) and tested by a discrete lattice model. The fracture model was calibrated by the experimental load-displacement curves and can reproduce the experimental observations well. In the end, the calibrated model was used to predict the mechanical behaviour of ITZ under uniaxial tension, which can be further used as input for the multi-scale analysis of concrete.

引用

页数：12

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