Flexural performance of RC beams made with recycled brick aggregate

Mohammed, Tarek Uddin; Das, Hare Krishna; Mahmood, Aziz Hasan; Rahman, Md. Nafiur; Awal, Mohammad Abdul

doi:10.1016/j.conbuildmat.2016.12.135

Cited by 29 publications

(13 citation statements)

References 11 publications

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“…Research efforts have been dedicated to characterizing the properties of RRC beams and columns in static loading conditions. The influence of RCAs on the monotonic shear [11][12][13][14][15][16][17][18][19][20][21][22][23] or flexural [24][25][26][27][28][29][30][31][32][33][34][35] behaviors of RRC beams has also been extensively experimentally investigated, with the replacement ratio (i.e., r) varied from 0% to 100%. The experimental outcomes indicate that: (i) in either shear or flexural failure, the presence of various RCA replacement ratios only has a limited influence on the damage process and failure pattern of RRC beams; (ii) an increased replacement ratio appears to reduce the load-carrying capacity of RRC beams.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Reinforced Recycled Aggregate Concrete Columns under Cyclic Loadings

et al. 2019

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Recycled concrete aggregates (RCAs) generated from construction and demolition activities have been recognized as a feasible alternative to natural aggregates (NAs). Naturally, the columns fabricated with reinforced recycled concrete (RRC) have been proposed and investigated to promote the structural use of recycled aggregate concrete (RAC). There is still, however, very limited modeling research available to reproduce, accurately and efficiently, the seismic response of RRC columns under lateral cyclic loading; proper evaluations are also lacking on addressing the columns’ seismic behaviors. To fill some of those research gaps, a fiber-based numerical model is developed in this study and then validated with the experimental results published in the literature. Subsequently, the numerical model justified is applied to carry out a comprehensive parametric study to examine the effects of a range of variables on the hysteretic characteristics of RRC columns. Furthermore, a grey relational analysis is conducted to establish quantifiable evidence of key variable sensitivities. The evaluation results imply that the use of the additional water method (AWM) for manufacturing RAC is likely to reduce the lateral load-carrying capacity of the RRC columns (up to 10%), whereas the opposite would occur if a conventional mixing procedure is adopted. Moreover, compared with other factors such as steel area ratio, the content of RCA replacement has a less remarkable effect on the seismic performance of the RRC columns. In general, the RRC columns possess acceptable seismic-resistant properties, and they can be used in earthquake-prone regions with confidence.

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Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Reinforced Recycled Aggregate Concrete Columns under Cyclic Loadings

et al. 2019

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“…For substitutions of RBA equal to or greater than 50%, although the ultimate flexural load remains at values above the control concrete, the cracking moment decreases by 21% and the deflections The results obtained by Mohammed et al [28] in flexural strength tests of reinforced beams (not prestressed) replacing the entire coarse fraction of natural aggregates with RBA from different origins (first and second class bricks) provided an irrelevant loss in terms of ultimate flexural load and cracking moment. However, the optimal results that they obtained are explained mainly because the fine fraction of natural aggregates was not replaced.…”

Section: Flexural Strength Test Of the Joistsmentioning

confidence: 87%

“…There is few research into the use of RBA in structural applications. Mohammed et al [28] compare the flexural behaviour of beams manufactured with RBA from different origins. They used ceramic waste from demolitions, with remains of adhered mortar, but also clean crushed bricks.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of prestressed joists made using recycled ceramic aggregates

Gayarre

González

López

et al. 2019

Construction and Building Materials

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This work addresses the reuse of recycled bricks aggregates (RBA), coming from faulty bricks for manufacturing prestressed concrete joists, with different percentages of these recycled aggregates, in building floor slabs.The prestressed joists were manufactured in a local factory with precast facilities and later they were tested to determine their flexural and shear strength. In addition, the set joist-rib-compression layer was also tested in order to assess its flexural and shear strength of the whole set.The results obtained are favourable using RBA percentages up to 35%, but if the set joist-ribcompression layer is considered, using conventional concrete on the rib and the compression layer, this percentage could reach 70%.

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“…3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 2.1. 3…”

Section: Aggregate Production Process and Size Selectionunclassified

Experimental Investigation of Properties of Concrete Containing Recycled Construction Wastes

Jin

Elamin

et al. 2018

Int J Civ Eng

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This research focused on investigating the effects of recycled aggregates on the material properties of concrete and the structural performance of reinforced concrete beams. Two different sources of recycled aggregates, crushed red bricks and demolished concrete, collected from local construction and demolition wastes, were analysed. The pre-wetting method was applied to recycled coarse aggregates aiming to study its effects on concrete specimens. Experimental results assisted by regression analysis revealed that the pre-wetting method could minimize the negative effects caused by recycled aggregate itself on the concrete slump and compressive strength test results. Pre-wetting method was also found improving the dynamic modulus of elasticity for concrete specimens. Adding supplementary cementitious materials was not as effective as the pre-wetting method in enhancing concrete slump, Ultrasonic Pulse Velocity (UPV), strength, or dynamic modulus of elasticity. The reduction of concrete UPV and compressive strength caused by recycled aggregates were more significant in the early curing age. Flexural tests on reinforced concrete beams indicated that although adding recycled concrete aggregates did not significantly change the beam failure load, the ultimate deformation of reinforced concrete beams was reduced by displaying more brittle failure behavior. It was indicated that the failure mode of beam was changed from flexural to shear, inferring that shear capacity of beam with RCA was reduced. Future research directions were proposed focusing on the durability studies of concrete members containing recycled aggregates especially when the pre-wetting method was applied.

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Flexural performance of RC beams made with recycled brick aggregate

Cited by 29 publications

References 11 publications

Performance Evaluation of Reinforced Recycled Aggregate Concrete Columns under Cyclic Loadings

Performance Evaluation of Reinforced Recycled Aggregate Concrete Columns under Cyclic Loadings

Mechanical properties of prestressed joists made using recycled ceramic aggregates

Experimental Investigation of Properties of Concrete Containing Recycled Construction Wastes

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