Properties of ultra-high performance fiber reinforced cementitious composites made with gypsum-contaminated aggregates and cured at normal and elevated temperatures

被引：15
作者：
Gesoglu, Mehmet [1 ]
Guneyisi, Erhan [1 ]
Nahhab, Ali H. [1 ,2 ]
Yazici, Halit [3 ]
机构：
[1] Gaziantep Univ, Dept Civil Engn, Gaziantep, Turkey
[2] Babylon Univ, Dept Civil Engn, Babylon, Iraq
[3] Dokuz Eylul Univ, Dept Civil Engn, Izmir, Turkey
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2015年 / 93卷
关键词：
Ultra-high performance fiber reinforced cementitious composite (UHPFRCC); Gypsum-contaminated aggregate; Internal sulfate attack; Expansion; Microstructure; Steam curing; MECHANICAL-PROPERTIES; UNIAXIAL TENSILE; CONCRETE; ETTRINGITE; RESISTANCE; SHRINKAGE; STRENGTH; BEHAVIOR; MORTAR; ATTACK;
D O I：
10.1016/j.conbuildmat.2015.05.130
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Aggregates in many parts of the Middle East are contaminated with gypsum. Therefore, in this study the effects of using gypsum-contaminated natural sand on the compressive strength and expansion of ultra-high performance fiber reinforced cementitious composites (UHPFRCCs) were investigated over a period of one year. Two groups of UHPFRCCs were designed with binary and ternary cementitious blends of Portland cement, silica fume, and/or ground granulated blast furnace slag. Each group consisted of five mixes with different SO3 contents of between 0.11% and 4.5% by weight of natural sand. For each mix, the samples were either water cured or steam cured over a 48 h period. The microstructure of the cementitious composites was also studied by the SEM-EDX. Besides, some findings of UHPFRCCs were compared to those of Portland cement mortars. Test results indicated that UHPFRCCs showed a strength gain, particularly under steam curing and an insignificant expansion even in the presence of excess sulfates, in contrast to the mortars. (C) 2015 Elsevier Ltd. All rights reserved.
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收藏
页码：427 / 438
页数：12
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