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Bond behavior between recycled aggregate concrete and deformed bars under uniaxial lateral pressure
- Source :
- Construction and Building Materials. 185:12-19
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- This paper investigates the bond behavior of deformed bars embedded in recycled aggregate concrete (RAC) subjected to uniaxial lateral pressure. Sixty pull-out specimens with different levels of recycled coarse aggregate (RA; i.e. 0%, 30%, 50%, 70% and 100%) were manufactured, and then these specimens were submitted to test the bond-slip curves under different levels of uniaxial lateral pressure (i. e. 0, 0.1fcu, 0.2fcu, and 0.3fcu). The effects of lateral pressure and RA content on bond strength, peak slip, residual bond strength and bond energy density were analyzed; the bond-slip relationship between RAC and deformed bars was also established. The results demonstrated that the bond strength of reinforced RAC is comparable with that of reinforced natural aggregate concrete (NAC). It is feasible to adopt RA in structural application but the bond ductility should be improved before it can be reliable reused. With the incremental of lateral pressure, the peak slip, relative bond strength and the bond energy density gradually increased, while the relationship between these parameters and RA content could not be clearly observed. In addition, the parameter value for descending bond-slip curve was abruptly decreased after lateral pressure was applied, demonstrating that the lateral pressure increased the bond ductility of RAC specimens.
- Subjects :
- Materials science
Bond strength
Bond
0211 other engineering and technologies
020101 civil engineering
02 engineering and technology
Building and Construction
Slip (materials science)
0201 civil engineering
021105 building & construction
General Materials Science
Bond energy
Composite material
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 09500618
- Volume :
- 185
- Database :
- OpenAIRE
- Journal :
- Construction and Building Materials
- Accession number :
- edsair.doi...........cc1a3c7cf22806ccb8d0ecbf59015a4d