An experimental study on flexural strength of reinforced concrete beams with 100% recycled concrete aggregate

Arezoumandi, Mahdi; Smith, Adam; Volz, Jeffery S.; Khayat, Kamal H.

doi:10.1016/j.engstruct.2015.01.043

Cited by 165 publications

(56 citation statements)

References 19 publications

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“…SFs and RCA also have a combined effect on the Young's modulus of SFRAC which is similar to the effect on compressive strength. Based on the experimental data from this study and previous studies [7,10,16,20,23,29,30], the relationship between c E and c f are drawn as scatter points in Fig.7. Overall,…”

Section: Young's Modulusmentioning

confidence: 99%

Compressive behavior of steel fiber reinforced recycled coarse aggregate concrete designed with equivalent cubic compressive strength

Gao

Zhang

Nokken

2017

Construction and Building Materials

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Experiments were carried out on over 100 specimens to characterize the compressive behavior of steel fiber reinforced-recycled coarse aggregate concrete (SFRCAC). Emphasis was placed on the combined effect of steel fibers (SFs) and recycled coarse aggregate (RCA) on the axial compressive behavior of SFRCAC with equivalent compressive strength. Test results indicate that with the addition of SFs, Young's modulus and stress-strain curves of SFRCAC are similar with natural coarse aggregate (NCA) concrete, but the critical strain has significant increase with increase of SFs content and RCA replacement ratio. Regression formula of compressive strength, Young's modulus, critical strain and constitutive model of SFRCAC were proposed.

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Section: Young's Modulusmentioning

confidence: 99%

Compressive behavior of steel fiber reinforced recycled coarse aggregate concrete designed with equivalent cubic compressive strength

Gao

Zhang

Nokken

2017

Construction and Building Materials

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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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“…For beams without shear reinforcement, 100% and 0% replacement specimens were almost equal but the specimen with 50% replacement exhibited 15% lower strength, as shown in Figure 2. Flexural behaviour of beam specimens was also assessed by Mahdi et al (Arezoumandi, et al 2015) using longitudinal reinforcement ratios 0.47% and 0.64%. Beams 300mm wide, 460mm deep and span length of 2700mm were used.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 3: Response of beam specimens having reinforcement ratios (Arezoumandi, et al 2015) This study aims to investigate the uniaxial compressive, tensile and flexural strength of recycled aggregate concrete and behaviour of reinforced RAC beams by assessing several important aspects which may influence its behaviour. For this purpose, the mechanical properties of concrete made with recycled aggregates having replacement percentage of 0%, 30% 50%, 70% and 100% was used.…”

Section: Introductionmentioning

confidence: 99%

Use of recycled concrete aggregates in structural concrete

Khan¹,

Fareed²,

Khad³

2019

Sustainable Construction Materials and Technologies (SCMT)

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The investigation herein focuses on studying the possibility of using recycled concrete aggregates in structural concrete. The study aims in investigating the uniaxial compressive, tensile and flexural strength of recycled aggregate concrete and behaviour of reinforced RAC beams by assessing several important aspects which may influence its behaviour. These aspects include the replacement percentage of recycled aggregates used in concrete and water to cement ratio. Concrete made with recycled concrete aggregates having replacement percentage of 0%, 30% 50%, 70% and 100% was used and were tested at 28 days curing. In general, it was found that increasing percentage of the recycled aggregates resulted in decrease in the concrete compressive, tensile and flexural strengths. However, the use of RAC as structural concrete can be justified by optimizing the replacement percentage of recycled concrete aggregates and water to cement ratio to get the desirable behaviour of reinforced concrete structures.

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An experimental study on flexural strength of reinforced concrete beams with 100% recycled concrete aggregate

Cited by 165 publications

References 19 publications

Compressive behavior of steel fiber reinforced recycled coarse aggregate concrete designed with equivalent cubic compressive strength

Compressive behavior of steel fiber reinforced recycled coarse aggregate concrete designed with equivalent cubic compressive strength

Performance Evaluation of Reinforced Recycled Aggregate Concrete Columns under Cyclic Loadings

Use of recycled concrete aggregates in structural concrete

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