PSI - Issue 42

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Structural Integrity Procedia 00 (2019) 000 – 000 il l li t . i i t. tr t r l I t rit r i ( )

www.elsevier.com/locate/procedia . l i r. /l t / r i

ScienceDirect

Procedia Structural Integrity 42 (2022) 1231–1238

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 Abstract In recent years recycled aggregates, from construction demolition waste, has been used as a replacement to normal (natural) aggregates in concrete. This is to preserve the depletion of natural resources and to further reduce carbon footprints in terms of energy depletion and waste disposition. Mechanical properties, such as compressive and tensile strengths, of recycled aggregates concrete (RAC) have been investigated by several researchers and were compared with that of normal aggregate concrete (NAC). In this investigation, the shear strengths and modes of failure of RAC and NAC beams have been investigated. In addition, the behavior of RAC and NAC beams strengthened with carbon-fiber-reinforced-polymer (CFRP) U-wrapped laminates have been examined. Four RAC and NAC shear-deficient rectangular beams were cast, two of which were strengthened in shear with CFRP U-wraps. The beams were tested to failure under four-point bending. The test results indicate that the shear capacity of all specimens strengthened with CFRP composites increased significantly compared to the control beam specimens. The performance of the RAC and NAC beams before and after strengthening were compared. It was observed that the RAC specimens provided similar shear strength as that of the NAC beams. The percentage increase in the shear capacity of RAC beams reached almost 60% of the control beam for the beams with U-wraps. The ACI 318-19 and ACI440.2R-17 codes are also used to predict the shear strength of the tested RAC and NAC beams and it was observed that the predicted capacities were close to the experimentally measured ones. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: Carbon Fiber Reinforced Polymers (CFRP), Shear Strength, Recycled Aggregates, Normal Aggregates 1. Introduction The need for the use of environmentally friendly and recyclable materials in the construction industry has grown tremendously in recent years due to the sustainability awareness and urge for conserving non-renewable materials. Moreover, it is noteworthy to mention that steel and concrete, which are the two primary conventional materials used t l t , t ti liti t , l t t l t l t i t . i i t t l ti t l t t t i t i t l ti t i iti . i l ti , i t il t t , l t t i ti t l it t t l t t . t i i ti ti , t t t il i ti t . iti , t i t t it i i l l i t i . i i t t l t, t i t t i it . t t t il i t i . t t lt i i t t t t it ll i t t it it i i i i tl t t t l i . t t t t i . t t t t i i i il t t t t t . t i i t it l t t t l t it . . l t i t t t t t t t it t t t i t iti l t t i t ll . t . li ls i . . This is an open access article under the CC BY-NC-ND license (http://cr ti . /li / / . / i i ilit t : r i r i f r l r ( ), r tr t , l r t , r l r t . i t i t ll i l l l t i l i t t ti i t t l i t t t t i ilit i l t i l . , it i t t t ti t t t l t , i t t i ti l t i l 23 European Conference on Fracture - ECF23 Comparison of shear behavior of normal and recycled aggregates beams strengthened with CFRP U-Wraps Jamal A. Abdalla a, *, Haya H. Mhanna b , Rami A. Hawileh a , S. S. Ahmed c , A. Omer c , O. Abdulkadeer c a Professor, Department of Civil Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates b Research Associate, Department of Civil Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates c Former student, Department of Civil Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates * Corresponding author, email: jabdalla@aus.edu a, b a . Ahmed c , A. O c e c a f , t t f i il i i , i i it f j , . . , j , it i t b i t , t t f i il i i , i i it f j , . . , j , it i t c t t, t t f i il i i , i i it f j , . . , j , it i t * i t , il: j ll .

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 l i r . . i i rti l r t - - li ( tt :// r ti . r /li / - - / . /) i i ilit t - t r . li

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.157