Improved chloride resistance of high-strength concrete amended with coal bottom ash for internal curing

被引：62

作者：

Kim, H. K. ^{[1
]}

Jang, J. G. ^{[2
]}

Choi, Y. C. ^{[3
]}

Lee, H. K. ^{[2
]}

机构：

[1] Chosun Univ, Sch Architecture, Kwangju 501759, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Civil & Environm Engn, Taejon 305701, South Korea

[3] Korea Conform Labs, Seoul, South Korea

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2014年 / 71卷

基金：

新加坡国家研究基金会;

关键词：

Coal bottom ash; Internal curing; Chloride diffusion; Chloride binding; Electron probe microanalyzer; HIGH-PERFORMANCE CONCRETE; C-S-H; THERMAL-ANALYSIS; LIGHTWEIGHT AGGREGATE; FRIEDELS SALT; CEMENT PASTE; FLY-ASH; BINDING; DURABILITY; DIFFUSION;

D O I：

10.1016/j.conbuildmat.2014.08.069

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The present work studies a chloride resistance of high-strength concrete incorporating bottom ash aggregates for internal curing. The chloride diffusion in concrete was evaluated by measuring the diffusion distance through steady-state and rapid-state penetration tests. The acid-soluble and water-soluble chloride contents in concrete were measured to evaluate the total and bound chloride concentrations in concrete. To detect the crystalline phase of hydration products that can bind chloride, a thermal analysis and an X-ray diffraction (XRD) analysis were carried out. In addition, the path of chloride penetration in concrete was analyzed by using an electron probe microanalyzer (EPMA). The results showed that, although there was no significant effect on the diffusion length, bottom ash in high-strength concrete can significantly reduce the amount of chloride diffusion. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：334 / 343

页数：10

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