Consistent identification of the interfacial transition zone in simulated cement microstructures

被引：29

作者：

Carrara, P. ^{[1
]}

De Lorenzis, L. ^{[1
]}

机构：

[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst Appl Mech, Bienroder Weg 87, D-38106 Braunschweig, Germany

来源：

CEMENT & CONCRETE COMPOSITES | 2017年 / 80卷

基金：

欧洲研究理事会;

关键词：

Cement paste microstructure; Interfacial transition zone; ITZ thickness; Numerical analyses; Simulated microstructures; COMPUTER-SIMULATION; AGGREGATE; HYDRATION; PASTE; MORTARS; PERCOLATION; DIFFUSIVITY; CONCRETE; PORTLAND; PHASES;

D O I：

10.1016/j.cemconcomp.2017.03.008

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

A method to consistently identify the thickness of the interfacial transition zone (ITZ) between aggregates and bulk hardened cement paste (HCP) is proposed. Three different criteria to identify the boundaries of the ITZ are established, all based on the analysis of the trend of the effective water-to cement ratio (w/c) close to an aggregate surface. The method is conceived so as to keep at minimum the operator intervention, thus permitting an objective evaluation of the ITZ thickness. The proposed procedure is applied to a series of ordinary Portland cement samples with different w/c ratios obtained using the code CEMHYD3D. The obtained results and the effects of the presence of the ITZ on the unhydrated and hydrated microstructures are analyzed and discussed. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：224 / 234

页数：11

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