Carbonation resistance and microstructural analysis of Low and High Volume Fly Ash Self Compacting Concrete containing Recycled Concrete Aggregates

被引：80
|
作者：
Singh, Navdeep [1 ]
Singh, S. P. [1 ]
机构：
[1] Dr BR Ambedkar Natl Inst Technol, Dept Civil Engn, Jalandhar 144011, India
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 127卷
关键词：
Low Volume Fly Ash; High Volume Fly Ash; Self Compacting Concrete; Coarse Recycled Concrete Aggregates; Accelerated carbonation; INTERFACIAL TRANSITION ZONES; COMPRESSIVE STRENGTH; CEMENTITIOUS BLENDS; FINE AGGREGATE; DURABILITY; PERFORMANCE; COARSE; IMPACT; CONSTRUCTION; PENETRATION;
D O I：
10.1016/j.conbuildmat.2016.10.067
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The present study investigates the carbonation resistance of Low Volume Fly Ash (LVFA) and High Volume Fly Ash (HVFA) based Self Compacting Concrete (SCC) made with Coarse Recycled Concrete Aggregates (RCA). In order to study the carbonation resistance of LVFA and HVFA based SCC mixes made with RCA, accelerated carbonation tests were conducted for an exposure period of 4, 12 and 16 weeks. The results indicate that with the increase in RCA content as replacement of Coarse Natural Aggregates (NA), decrease in the carbonation resistance of SCC mixes has been observed. The inclusion of metakaolin (MK) as a mineral admixture has been found to compensate the loss in the carbonation resistance on account of substitution of NA with RCA to some extent. The current investigation also emphasises on the microstructural study performed by Scanning Electron Microscopy (SEM) and Thermogravimetric Analysis (TGA) for validation of observed results. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：828 / 842
页数：15
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