Evaluation of sulfate resistance of Portland and high alumina cement mortars using hardness test

被引：39

作者：

Aye, Thidar ^{[1
]}

Oguchi, Chiaki T. ^{[2
]}

Takaya, Yasuhiko ^{[2
]}

机构：

[1] Saitama Univ, Dept Civil & Environm Engn, Sakura Ku, Saitama 3388570, Japan

[2] Saitama Univ, Geosphere Res Inst, Sakura Ku, Saitama 3388570, Japan

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2010年 / 24卷 / 06期

关键词：

High alumina cement; Physical sulfate attack; Chemical sulfate attack; Salt crystallization; Surface hardness; Equotip hardness tester; MAGNESIUM-SULFATE; CONCRETE; ATTACK; PLAIN; CRYSTALLIZATION;

D O I：

10.1016/j.conbuildmat.2009.11.016

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Portland cement and high alumina cement mortar specimens were exposed to cycles of drying at 40 degrees C, cooling at 20 degrees C and immersion in Na2SO4 and MgSO4 solutions at 20 degrees C. The resistance of mortars was evaluated by visual inspection and by measuring the change in surface hardness and weight of the specimens. The decrease and increase in surface hardness were observed in both mortars by treating with Na2SO4 and MgSO4 solutions, respectively. The combined effect of the chemical and physical attack by Na2SO4 was attributed to the complete failure of Portland cement mortar, whereas only marginal damage of high alumina cement mortar was believed owing to physical salt crystallization. No damage was observed in both mortars treated with MgSO4 solution. (c) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1020 / 1026

页数：7

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