Influence of incorporation of nano-silica and recycled aggregates on compressive strength and microstructure of concrete

被引：109
作者：
Mukharjee, Bibhuti Bhusan [1 ]
Barai, Sudhirkumar V. [1 ]
机构：
[1] Indian Inst Technol, Dept Civil Engn, Kharagpur 721302, W Bengal, India
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2014年 / 71卷
关键词：
Backscatter Scanning Electron Microscopic image; Colloidal nano-silica; Compressive strength; Recycled aggregate concrete; Vickers microhardness; COARSE AGGREGATE; CONSTRUCTION; BEHAVIOR; FIELD;
D O I：
10.1016/j.conbuildmat.2014.08.040
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The present investigation deals with the study of compressive strength and characteristics of the Interfacial Transition Zone (ITZ) of concrete containing recycled aggregates and nano-silica. For this purpose, compressive strength at 7, 28, 90 and 365 days are determined for fully natural and recycled aggregate concrete mixes made with or without nano-silica. In addition to above, Vickers microhardness test and backscattered-mode scanning electron microscopic analysis is carried to characterize ITZ of concrete mixes. The results of study depict that full replacement of natural coarse aggregates with recycled ones have significant effect on compressive strength and ITZ characteristics of concrete. However, compressive strength and microstructure of concrete mixes improves with the incorporation of nano-silica. (C) 2014 Elsevier Ltd. All rights reserved.
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页码：570 / 578
页数：9
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