Equation for stress–strain relationship of recycled aggregate concrete in axial compression

Suryawanshi, S. R.; Singh, Bhupinder; Bhargava, Pradeep

doi:10.1680/jmacr.16.00108

Cited by 25 publications

(14 citation statements)

References 10 publications

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“…The σ p of RAC with replacement ratios of 20%, 40%, 60%, 80% and 100% were 15.2%, 10.6%, 17.1%, 20.3% and 27.4% lower than that of NAC, respectively, and the corresponding ε p of RAC with replacement ratios of 20%, 40%, 60%, 80% and 100% were −0.8%, 3.8%, 9.4%, 16.8% and 25.6% higher than that of NAC, respectively. Suryawanshi et al [ 18 ], Xiao et al [ 20 ], Belén et al [ 21 ] and Luo et al [ 44 ] revealed a similar conclusion that the σ p of uncarbonated RAC was no more than 30% lower than that of NAC, and the ε p of RAC was no more than 25% higher than that of NAC. It was because with increasing content of RCA, in addition to the rising number of cracks inside mortar and ITZ, the effective water-cement ratio around RCA was larger than that around NCA due to the adopted prewetting method before mixing, thus leading to a decrease in σ p .…”

Section: Resultsmentioning

confidence: 78%

“…In previous studies, researchers were devoted to the investigation on the stress–strain relationship of RAC and proposed corresponding models [ 18 , 20 , 21 ]. The model proposed by Guo [ 45 ] was used to describe the stress–strain curves of RAC after carbonation.…”

Section: Fitting Analysis Of Stress–strain Relation Of Rac After Carbonationmentioning

confidence: 99%

“…The stress–strain relationship of recycled concrete structures subject to external load could realistically reflect their mechanical behavior, and a series of meaningful research results have been reported. Suryawanshi et al [ 18 ] carried out the analysis of the constitutive relationship of recycled concrete with various replacement ratios of RCA, the results suggested that compared with NAC, the peak strain of RAC with 100% replacement ratio increased by about 26%, the elastic modulus and compressive strength of RAC decreased by 38% and 11%, respectively. On the basis of comparing constitutive relationships of RAC at 0%, 50% and 100% replacement ratio, D’Alessandro et al [ 19 ] found that the stiffness of RAC decreased with the increase of low strength RCA content.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties and Uniaxial Compression Stress—Strain Relation of Recycled Coarse Aggregate Concrete after Carbonation

Chen

Dong

2021

Materials

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The application of recycled coarse aggregate (RCA) made from waste concrete to replace natural coarse aggregate (NCA) in concrete structures can essentially reduce the excessive consumption of natural resources and environmental pollution. Similar to normal concrete structures, recycled concrete structures would also suffer from the damage of carbonation, which leads to the deterioration of durability and the reduction of service life. This paper presents the experimental results of the cubic compressive strength, the static elastic modulus and the stress–strain relation of recycled coarse aggregate concrete (RAC) after carbonation. The results show that the cubic compressive strength and the static elastic modulus of carbonated RAC gradually increased with the carbonation depth. The uncarbonated and fully carbonated RAC show smaller static elastic modulus than natural aggregate concrete (NAC). As the carbonation depth increased, the peak stress increased, while the peak strain decreased and the descending part of the curves gradually became steeper. As the content of RCA became larger, the peak stress decreased, while the peak strain increased and the descending part of the curves gradually became steeper. An equation for stress–strain curves of RAC after carbonation was proposed, and it was in good agreement with the test results.

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Section: Resultsmentioning

confidence: 78%

Section: Fitting Analysis Of Stress–strain Relation Of Rac After Carbonationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties and Uniaxial Compression Stress—Strain Relation of Recycled Coarse Aggregate Concrete after Carbonation

Chen

Dong

2021

Materials

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“…Many studies were conducted on the behavior of concretes containing RCA (e.g., References 10–17). As was mentioned in literature, mechanical strength and durability characteristics of concretes having RCA were generally inferior in comparison with those without RCA 18,19 .…”

Section: Introductionmentioning

confidence: 99%

Mechanical and durability properties of steel fiber‐reinforced concrete containing coarse recycled concrete aggregate

Kaplan

Bayraktar

Gholampour

et al. 2021

Structural Concrete

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The focus of this study is to investigate the effect of using coarse recycled concrete aggregates (RCAs) as an alternative material to natural coarse aggregate on the fresh, mechanical and durability behavior of concrete reinforced with steel fiber. Eighteen unique concrete mixes with RCA content of 0%, 50%, and 100% and steel fiber content of 0%, 1%, and 2% were prepared, and tests were performed to study slump, density, compressive and splitting tensile strengths, flexural behavior, surface hardness, surface abrasion resistance, water absorption, and sorptivity of each mix. It is shown that concrete containing RCA has a lower unit weight, compressive, splitting tensile and flexural strength, flexural toughness, surface hardness, and abrasion resistance, and a higher water absorption and sorptivity in comparison with conventional concrete. An increased compressive, splitting tensile and flexural strength, flexural toughness, surface hardness, and abrasion resistance, and a decreased water absorption and sorptivity of concrete with an increased steel fiber content from 1% to 2% is less significant compared to those from 0% to 1%. The results also show that, at RCA content of 50%, incorporating 1% steel fiber develops a concrete mix with similar or even better properties compared to unreinforced conventional concrete. At 100% RCA content, incorporating 2% steel fiber develops a concrete mix with similar properties to unreinforced conventional concrete having water to cement ratio of 0.3, but inferior properties to unreinforced conventional concrete having water to cement ratio of 0.5. These findings indicate that recycled aggregate concrete with similar or even better properties compared to concrete with natural aggregate can be developed through properly designing mixes, providing a great avenue toward the production of green construction material for structural applications.

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“…Since then, a great deal of research has been carried out to develop RAC worldwide. The material property of recycled aggregate (Wang, Hsiao, and Wang 2012;Bravo et al 2015), the mechanic performance of RAC under the static loadings (ACI Committee 555, 2002), and the constitutive relationship of stress-strain of RAC under the static loadings (Xiao, Li, and Zhang 2005;Suryawanshi, Singh, and Bhargava 2018) are experimentally studied and theoretically analyzed. It has been found that there is a slight difference in mechanical properties between recycled aggregate concrete (RAC) and natural aggregate concrete (NAC) because of the variability and randomness of waste concrete from disparate sources.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of hysteretic behavior for RAC structure under earthquake loading

Wang,

Xiao

2019

Journal of Asian Architecture and Building Engineering

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The hysteretic properties of RAC structure subjected to different strain rates are analyzed, and the displacement ductility is assessed. It is revealed that, under earthquake wave excitation with the increasing strain rate, the lateral stiffness, the bearing capacity, and the energy dissipation increases progressively. However, the ductility of RAC structure decreases gradually with the increasing strain rate. The rate-dependent capacity curve model of RAC structure is suggested. The damage evolution of RAC structure subjected to different strain rates is investigated. Furthermore, the dynamic damage model of RAC structure in which the strain rate effect is taken into account is proposed.

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Equation for stress–strain relationship of recycled aggregate concrete in axial compression

Cited by 25 publications

References 10 publications

Mechanical Properties and Uniaxial Compression Stress—Strain Relation of Recycled Coarse Aggregate Concrete after Carbonation

Mechanical Properties and Uniaxial Compression Stress—Strain Relation of Recycled Coarse Aggregate Concrete after Carbonation

Mechanical and durability properties of steel fiber‐reinforced concrete containing coarse recycled concrete aggregate

Numerical analysis of hysteretic behavior for RAC structure under earthquake loading

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