Response of concrete to accelerated physical salt attack exposure

被引：105

作者：

Bassuoni, M. T. ^{[1
]}

Rahman, M. M. ^{[1
]}

机构：

[1] Univ Manitoba, Dept Civil Engn, Winnipeg, MB R3T 5V6, Canada

来源：

CEMENT AND CONCRETE RESEARCH | 2016年 / 79卷

关键词：

Durability (C); Concrete (E); Permeability (C); Cycles (C); Physical salt attack; SULFATE ATTACK; CRYSTALLIZATION;

D O I：

10.1016/j.cemconres.2015.02.006

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Various concrete structures/elements are at risk of physical salt attack (PSA) during service; however, there is currently no standard test method in North America for PSA of cement-based materials. Therefore, an accelerated laboratory test, based on sodium sulfate, was developed in this research to assess the resistance of concrete to PSA. The effects of w/cm, fly ash and two types of nanoparticle (nano-silica [NS] and nano-alumina [NA]) addition on the resistance of concrete to PSA were also investigated. The assessment criteria were based on physical properties (visual appearance, mass loss and penetrability), and the alteration of microstructure by microscopy, thermal and mineralogical analyses. The results showed that the proposed procedure can successfully reflect the performance of concrete under PSA within a relatively short time interval (120 days). Also, adverse effects of higher w/cm (0.5) and nanoparticle addition on the resistance of concrete to PSA were captured. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：395 / 408

页数：14

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