Elastomeric influence of natural rubber latex on cement mortar at high temperatures using thermal degradation analysis

被引：25

作者：

Muhammad, Bala ^{[1
]}

Ismail, Mohammad ^{[1
]}

Yussuf, A. A. ^{[2
]}

Muhammad, A. R. B. ^{[1
]}

机构：

[1] Univ Teknol Malaysia, Fac Civil Engn, Johor Baharu 81310, Johor, Malaysia

[2] Univ Teknol Malaysia, Fac Chem Engn, Johor Baharu 81310, Johor, Malaysia

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2011年 / 25卷 / 05期

关键词：

Latex modified mortar; Elastomer; Scanning electron microscopy; Thermal degradation analysis; CONCRETE; STRENGTH;

D O I：

10.1016/j.conbuildmat.2010.11.006

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The importance of thermal endurance in relation to finishes prone to elevated temperatures cannot be over emphasized. Inclusion of elastomeric substances into mortar aimed at improving performance properties may therefore pose a serious threat. This paper presents experimental findings regarding elastomeric influence of natural rubber latex (NRL) - a typical elastomer - on cement mortar. Hardened cement paste, NRL-films, cement-latex blends, control and modified mortars containing 10% and 20% latex/water ratios were prepared and cured for 6 months. Microstructural units of samples were observed through SEM followed by subjection to TGA within a temperature range; 25-900 degrees C. The results indicate that NRL degrades to about 5% (by weight) at temperatures between 350 and 430 degrees C. Eventually, NRL-modified mortar was significantly affected by the softening of NRL-films present in the co-matrix. However, the overall resistance of the modified systems to thermal degradation was surprisingly improved by the inclusion of the elastomer. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2223 / 2227

页数：5

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