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Punching shear capacity of recycled aggregate concrete slabs
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Leelatanon, Satjapan, Imjai, Thanongsak, Setkit, Monthian, Garcia, Reyes and Kim, Boksun (2022) Punching shear capacity of recycled aggregate concrete slabs. Buildings, 12 (10). 1584. doi:10.3390/buildings12101584 ISSN 2075-5309.
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WRAP-punching-shear-capacity-recycled-aggregate-concrete-slabs-Garcia-2022.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (3533Kb) | Preview |
Official URL: http://dx.doi.org/10.3390/buildings12101584
Abstract
This article investigates the punching shear behavior of recycled aggregate concrete (RAC) two-way slabs. Ten 1500 mm × 1500 mm × 100 mm slabs were tested monotonically. Eight slabs were cast with RAC, whereas two control slabs were cast with natural aggregate concrete (NAC). The RAC incorporated coarse recycled concrete aggregate (RCA) at replacement levels of 25%, 50%, 75% and 100%. Two flexural reinforcement ratios (0.8% and 1.5%) were examined. The results show that the normalized punching shear strength of 100% RAC slabs decreased by 6.5% and 9% compared to NAC slabs for r = 1.5% and r = 0.8%, respectively. Doubling the amount of flexural reinforcement can increase the punching shear capacity of 100% RAC slabs by up to 45%. A punching shear database of 44 RAC slabs from literature and the 8 RAC slabs presented in this study revealed that the punching shear strength of RAC slabs predicted by ACI 318 was conservative, except for slabs with low reinforcement ratios (<0.6%). The punching shear strength predicted by Eurocode 2 gave more conservative results for all levels of RCA replacement and all flexural reinforcement ratios. A yield-line analysis also showed that the failure mode of the RAC slabs was controlled by punching shear.
| Item Type: | Journal Article | ||||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TS Manufactures |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
| Library of Congress Subject Headings (LCSH): | Concrete -- Recycling, Aggregates (Building materials), Punching (Metal-work) , Shear (Mechanics) , Concrete slabs , Columns, Yield-line analysis | ||||||
| Journal or Publication Title: | Buildings | ||||||
| Publisher: | MDPI | ||||||
| ISSN: | 2075-5309 | ||||||
| Official Date: | 1 October 2022 | ||||||
| Dates: |
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| Volume: | 12 | ||||||
| Number: | 10 | ||||||
| Article Number: | 1584 | ||||||
| DOI: | 10.3390/buildings12101584 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||
| Date of first compliant deposit: | 12 October 2022 | ||||||
| Date of first compliant Open Access: | 12 October 2022 |
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