Estimation of chloride diffusion coefficients of high-strength concrete with synthetic fibres after fire exposure

被引：19

作者：

Ozawa, Mitsuo ^{[1
]}

Sakoi, Yuki ^{[2
]}

Fujimoto, Kentaro ^{[1
]}

Tetsura, Kenta ^{[1
]}

Parajuli, Sirjana Subedi ^{[1
]}

机构：

[1] Gunma Univ, Dept Environm Engn Sci, 1-5-1 Tenjin Cho, Kiryu, Gunma 3768515, Japan

[2] Hachinohe Inst Technol, 88-1 Ohbiraki, Hachinohe, Aomori 0318501, Japan

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2017年 / 143卷

基金：

日本学术振兴会;

关键词：

High-strength concrete; Polypropylene fibre; Electron-probe microanalysis (EPMA); Tracer; Chloride diffusion coefficient; Heating test; Durability; SERVICE-LIFE; SENSITIVITY; PENETRATION; CARBONATION; PREDICTION; RESISTANCE; IONS;

D O I：

10.1016/j.conbuildmat.2017.03.117

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Tracer analysis was used to investigate the durability of concrete exposed to fire and then soaked in salt water. Two types of concrete specimens high-strength concrete (HSC) and HSC with polypropylene (PP) fibres were heated to different temperatures before being soaked for 30 days in a 10% NaCI solution. The chloride penetration depth was then measured with electron probe microanalysis, and the apparent chloride diffusion coefficients were estimated. The apparent chloride penetration was deeper in specimens exposed to higher temperatures. HSC with PP fibres exhibited greater penetration because the fibres melted. The chloride diffusion coefficient increased with the exposure temperature. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：322 / 329

页数：8

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