Effect of Recycled Concrete Aggregate Replacement Level on Shear Strength of Reinforced Concrete Beams

Arezoumandi, Mahdi; Drury, Jonathan; Volz, Jeffery S.; Khayat, Kamal H.

doi:10.14359/51687766

Cited by 49 publications

(66 citation statements)

References 9 publications

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“…The inferior properties of RAs make the cracks easily penetrate into the aggregate grains and concrete matrix phases due to the lack of stiffer RAs. Thus, as RAs were utilized, the value of G F decreased [10,24]. Also, as mentioned above, the crushing strength and volume fraction of the aggregate used in production of RAs have important impact on the reduction of fracture parameters of SCCs especially with 100% replacement level [39,45].…”

Section: Fracture Energy and Characteristic Lengthmentioning

confidence: 99%

“…However, for CCs, there is only one ITZ between virgin aggregate and fresh mortar. Although micro-fine materials like SF make the ITZ denser and structurally stronger, the existence of two ITZs for RAs mixes makes a weaker attach for RAs and hence reduces the G F of RCAs [24]. Tas ßdemir et al [49] and others [47,52,53] believed that the decrement of G F due to the inclusion of SF was related to the cement paste-aggregate interfacial bond and the microstructural heterogeneity in the concrete.…”

Section: Fracture Energy and Characteristic Lengthmentioning

confidence: 99%

“…The concrete fracture properties can provide more descriptions for the potential load-carrying capacity and post-peak behavior of the material in a given structural system [10,22,23]. The weakness of RAs negatively affects the fracture parameters such that the concrete with high replacement levels of RAs has lower fracture energy [24]. Casuccio et al [25] reported that the addition of RAs decreased the fracture energy by 27-45%.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Failure characteristics of self-compacting concretes made with recycled aggregates

Gesoğlu

Güneyisi

Öz

et al. 2015

Construction and Building Materials

110

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Section: Fracture Energy and Characteristic Lengthmentioning

confidence: 99%

Section: Fracture Energy and Characteristic Lengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Failure characteristics of self-compacting concretes made with recycled aggregates

Gesoğlu

Güneyisi

Öz

et al. 2015

Construction and Building Materials

110

View full text Add to dashboard Cite

“…In effect, the prepeak and max-peak performances in load-displacement curve are affected by the microcracks and their extension in concrete. In WG concrete, cracks can more easily penetrate through the matrix than conventional concrete due to few amounts of stiffer NA [36,37]. The physical properties as well as inferior strength of glass aggregate compared with NA contribute to the decrease in peak load.…”

Section: Fracture Characteristicsmentioning

confidence: 99%

“…It recorded 27.5%, 46.8%, and 50.5% for the first, second, and third series, respectively, compared with CTR mixture. Previous publications emphasized that of concrete was related to the cement paste-aggregate interfacial bond and the microstructural heterogeneity in the concrete [37,38]. The utilization of WG in concrete resulted in high porosity, easy crack penetration, and weaker ITZ region than reference concrete.…”

Section: Fracture Characteristicsmentioning

confidence: 99%

Strengths and Failure Characteristics of Self-Compacting Concrete Containing Recycled Waste Glass Aggregate

AL-Bawi

Kadhim

AL-Kerttani

2017

Advances in Materials Science and Engineering

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The effects of different proportions of green-colored waste glass (WG) cullet on the mechanical and fracture properties of selfcompacting concrete (SCC) were experimentally investigated. Waste bottles were collected, washed, crushed, and sieved to prepare the cullet used in this study. Cullet was incorporated at different percentages (0%, 20%, 40%, 60%, 80%, and 100% by weight) instead of natural fine aggregate (NFA) and/or natural coarse aggregate (NCA). Three SCC series were designed with a constant slump flow of 700 ± 30 mm, total binder content of 570 kg/m 3 and at water-to-binder (w/b) ratio of 0.35. Moreover, fly ash (FA) was used in concrete mixtures at 20% of total binder content. Mechanical aspects such as compressive, splitting tensile, and net flexural strengths and modulus of elasticity of SCC were investigated and experimentally computed at 28 days of age. Moreover, failure characteristics of the concretes were also monitored via three-point bending test on the notched beams. The findings revealed that the mechanical properties as well as fracture parameters were adversely influenced by incorporating of WG cullet. However, highest reduction of compressive strength did not exceed 43% recorded at 100% WG replacement level. Concretes containing WG showed less brittle behavior than reference concrete at any content.

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Experimental study on frame structures with recycled aggregate concrete under lateral cyclic loads

Guo

Chen

Fan

et al. 2017

Structural Concrete

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This paper presents an experimental study on the seismic behavior of frame structures made with recycled aggregate concrete (RAC). Three 1:2 scaled frame specimens were tested under lateral cyclic loads and constant vertical load. One of these frames was conventional concrete frame, while the remaining two frames were RAC frames with a recycled coarse aggregate (RCA) replacement percentage of 25 and 50%, respectively. The structural performances, in terms of the failure pattern and mechanism, ultimate lateral load capacity, hysteretic response, backbone curve, ductility capacity, energy dissipation capacity and stiffness degradation were analyzed in detail. The effect of RCA replacement percentage on the seismic performance of RAC frames was investigated carefully. The experimental results indicate that the seismic performance of RAC frame is similar to that of conventional concrete frame and not significantly affected by the incorporation of RCA. All of the tested frames behaved with the same failure pattern, which is a ductile failure mechanism. The average value of the ductility coefficient and the equivalent viscous damping ratio of the RAC frame are 3.55 and 0.089, respectively. The RAC frame structure with an RCA replacement percentage of 50% still has adequate capabilities of ultimate strength, deformation and energy dissipation and is able to withstand an earthquake attack.

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Effect of Recycled Concrete Aggregate Replacement Level on Shear Strength of Reinforced Concrete Beams

Cited by 49 publications

References 9 publications

Failure characteristics of self-compacting concretes made with recycled aggregates

Failure characteristics of self-compacting concretes made with recycled aggregates

Strengths and Failure Characteristics of Self-Compacting Concrete Containing Recycled Waste Glass Aggregate

Experimental study on frame structures with recycled aggregate concrete under lateral cyclic loads

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