Behaviour of confined recycled aggregate concrete under compressive loading: An experimental investigation

被引:10
|
作者
Dey, Tanish [1 ]
Das, Chandra Sekhar [1 ]
Mishra, Naval [1 ]
机构
[1] Indian Inst Technol ISM, Dept Civil Engn, Dhanbad 826004, Bihar, India
来源
关键词
Recycled aggregate concrete; Glass fibre reinforced polymer; Stress-strain behaviour; Compressive strength; Size effect; FIBER-REINFORCED POLYMER; MECHANICAL-PROPERTIES; RC COLUMNS; COARSE; DURABILITY; MOISTURE;
D O I
10.1016/j.jobe.2020.101825
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The present investigation is primarily aimed to study the effects of confinement of Glass fibre reinforced polymer (GFRP) and specimen size on the recycled aggregate concrete (RAC). The RAC is prepared by complete replacement of natural coarse aggregates (NCA) with recycled coarse aggregates (RCA). Strain gauges are used to study the variations of axial and lateral strain with axial stress. To examine the size effect the experimental investigation is carried out on specimen size of diameters 50, 100 and 150 mm with constant aspect ratio of two. A comparative study has also been drawn between NAC and RAC based on various parameters such as strength, effect of confinement on the stress-strain behaviour, effect of specimen size on strength and strain enhancement. Study reveals that there is effective load transfer from concrete to GFRP jacket resulting in improved strength in confined specimen. The size effect is more pronounced on strength enhancement of RAC compared to NAC for unconfined concrete. However, for confined concrete, pronounced size effect is observed in NAC over RAC on both strength and strain enhancement.
引用
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页数:9
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