Creep behaviour of concrete using recycled coarse aggregates obtained from source concrete with different strengths

Geng, Yun; Wang, Yuyin; Chen, Jie

doi:10.1016/j.conbuildmat.2016.10.086

Cited by 69 publications

(27 citation statements)

References 33 publications

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“…Current test results agree well with that in the existing literature [8][9][10][11][12][13][14][15][16][17][18][19][20]. Andal et al [18] tested strength and shrinkage of concrete using 20-mm recycled coarse aggregates of preserved quality and commercial quality (density = 2,310-2,320 kg/m 3 , absorption = 4.88-5.32%, w/c = 0.45).…”

Section: Strength Elastic Modulus and Poisson's Ratio Of Hardened Cosupporting

confidence: 86%

“…They have observed that when the effective w/c was maintained constant, the compressive strength was the same so the substitution of NA by RA did not have a significant effect. Geng et al [14] used 25-mm nominal size RA which replaced NA by 100% (density = 2,713 kg/m 3 , absorption = 5.07%, w/c = 0.45). They have observed some reduction of compressive strength from 100% RA concrete than NA concrete, but the reduction was less than 10%.…”

Section: Strength Elastic Modulus and Poisson's Ratio Of Hardened Comentioning

confidence: 99%

“…There have been many studies on the long-term behaviour of recycled aggregate concrete, but very few on the shrinkage and creep behaviour of recycled aggregate concrete using carbonated recycled aggregate [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Strength, shrinkage and creep of concrete including CO2 treated recycled coarse aggregate

Chinzorigt¹,

Choi²,

Enkhbold³

et al. 2024

JACF

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Strength development and long-term behaviour of recycled aggregate concrete (RAC) were investigated. Recycled coarse aggregate (RA) replaced natural coarse aggregate (NA) by 30%, 50%, and 100% by vol. in this study while natural fine aggregate was always used. For the investigation of strength development, 3, 7, 28, 56, 90, and 180 day compressive strengths and 28 day split tensile strength and flexural strength have been determined. Shrinkage and creep behaviours of RAC with 0%, 50%, and 100% RA replacing NA have been studied up to 6 months. The compressive strength of RAC was not affected by 30% replacement, but it was reduced by 50% and 100% replacement. Split tensile strength was not affected significantly while flexural strength was reduced with increasing amount of replacement. Shrinkage strain of RAC with 50% RA was similar to that of natural aggregate concrete, but shrinkage increased with 100% replacement. Specific creep of RAC with 100% RA increased by 38% over that of natural aggregate concrete. The strength of concrete with CO2 treated RA was lower than that of concrete with RA without CO2 treatment. Shrinkage of RAC with and without CO2 treatment was similar, while the creep of RAC with CO2 treated RA was smaller than that of RAC including RA without CO2 treatment.

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Section: Strength Elastic Modulus and Poisson's Ratio Of Hardened Cosupporting

confidence: 86%

Section: Strength Elastic Modulus and Poisson's Ratio Of Hardened Comentioning

confidence: 99%

See 1 more Smart Citation

Strength, shrinkage and creep of concrete including CO2 treated recycled coarse aggregate

Chinzorigt¹,

Choi²,

Enkhbold³

et al. 2024

JACF

View full text Add to dashboard Cite

show abstract

“…Particularly, 66–108% increase rate was obtained for FCWA r ratio of 30%, while 100–120% increase rate was observed for FCWA r ratio of 50–65%. These influence magnitudes were quite larger than the measured ones for RAC made with RCA, whose measured increase was generally 10–15% and 20–30% for RCA r ratio of 30% and 50%, respectively (e.g., Reference ). In this case, current RAC shrinkage models could not be applicable to predict the shrinkage of concrete made with FCWA.…”

Section: Outline Of Represented Experimental Investigations For Rac Mmentioning

confidence: 77%

Prediction of the mechanical behavior of recycled concrete with fresh concrete waste aggregate

Wang

Zhang

Fang

et al. 2019

Structural Concrete

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Crushing fresh waste concrete that collects from ready-mixed concrete plants to prepare aggregates for new concrete production reduces the carbon dioxide footprint. This study intends to predict the mechanical properties of recycled concrete with fresh concrete waste aggregate (FCWA), including compressive strength development over time, elastic modulus, and shrinkage. Current available experimental studies were first summarized to investigate the impact of FCWA incorporation on the mechanical properties of resulting concrete. Prediction expressions were proposed for compressive strength development over time for recycled concrete accounting for FCWA replacement (r) ratio. Elastic modulus and shrinkage prediction models were theoretically derived for recycled concrete accounting for the residual cement paste content (C RCP ) of FCWA and benchmarked against available experimental results. Results showed that concrete decreased its mechanical properties with increasing FCWA r ratio. 35.7-58.7% reductions in the compressive strength and 36-55% reductions in the elastic modulus for FCWA concrete could be observed, while 66-108% increases in the shrinkage could be obtained for concrete with FCWA r ratio of 30%. The models proposed in this study well predicted the mechanical properties for FCWA concrete. K E Y W O R D S elastic modulus, fresh waste concrete, mechanical model, recycled concrete, shrinkage

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“…However, there is a lack of in-depth exploration of the impact of factors. Geng et al [14] conducted experimental research on the creep behavior of RAC with different water-cement ratios of base concrete. The results show that the creep properties of recycled base concrete with a low water-cement ratio are significantly affected by recycled coarse aggregate (RCA), and the establishment of a prediction model for the creep of recycled base concrete needs to consider the influence of the water-cement ratio.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on a Prediction Model of the Shrinkage and Creep of Recycled Aggregate Concrete

Liu

Zhu

et al. 2019

Applied Sciences

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The significant difference between recycled aggregate and natural aggregate is the content of the attached mortar layer. With the increase of the replacement rate of recycled aggregate, the shrinkage and creep of recycled aggregate concrete is significantly increased. In this paper, 180-day shrinkage and creep tests of recycled aggregate concrete with different water–cement ratios were designed in order to analyze the effect of the substitution rate and water–cement ratio on shrinkage and creep properties. The results show that the shrinkage strain of recycled aggregate concrete with a substitution rate of 50% and 100% at 180 days is 26% and 48% higher than that of ordinary concrete, respectively, and the growth of group II is 22% and 47%, respectively. When the load was 180 days old, the creep coefficient of recycled aggregate concrete with a substitution rate of 50% and 100% in group I increased by 19.6% and 39.6%, respectively compared with ordinary concrete, and group II increased by 23.6% and 44.3%, respectively. Based on the difference of adhering mortar content, the creeping increase coefficient and shrinkage increase coefficient of the attached mortar were proposed, and a shrinkage and creep model of recycled aggregate concrete was established. When compared with the experimental results, the model calculation results met the accuracy requirements.

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Creep behaviour of concrete using recycled coarse aggregates obtained from source concrete with different strengths

Cited by 69 publications

References 33 publications

Strength, shrinkage and creep of concrete including CO2 treated recycled coarse aggregate

Strength, shrinkage and creep of concrete including CO2 treated recycled coarse aggregate

Prediction of the mechanical behavior of recycled concrete with fresh concrete waste aggregate

Experimental Study on a Prediction Model of the Shrinkage and Creep of Recycled Aggregate Concrete

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