Study on development of empirical relationships between durability parameters of concrete made with different types of binder and exposed to chloride environment

被引：20

作者：

Jee, Arya Anuj ^{[1
]}

Pradhan, Bulu ^{[1
]}

机构：

[1] IIT Guwahati, Dept Civil Engn, Gauhati 781039, India

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 212卷

关键词：

Concrete; Binder; Chloride; Diffusion; Corrosion; X ray diffraction; Empirical relationship; DIFFUSION-COEFFICIENTS; CONTAMINATED CONCRETE; FLY-ASH; REINFORCEMENT CORROSION; STEEL REINFORCEMENT; PART I; PREDICTION; PERFORMANCE; BINDING; REBAR;

D O I：

10.1016/j.conbuildmat.2019.04.048

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study aims to investigate and correlate durability parameters in concrete exposed to external chloride. Tests for corrosion, chloride diffusion, and X ray diffraction (XRD) analysis were performed. Based on results, ordinary Portland cement (OPC) exhibited 4.82 and 2.02 times higher apparent chloride diffusion coefficient than Portland pozzolana cement (PPC) and OPC plus fly ash. Reinforced concrete specimens made with PPC showed better performance against corrosion as compared to those made with OPC plus fly ash followed by OPC. Concentration of chloride ions in exposure solution significantly affected microstructure of concrete as indicated by formation of compounds from XRD results. Developed empirical relationships between durability parameters for OPC and PPC predicted well the corrosion current density for OPC plus fly ash that was independent of model development. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：799 / 817

页数：19

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