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

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

doi:10.1016/j.conbuildmat.2013.12.019

Cited by 122 publications

(62 citation statements)

References 9 publications

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“…The simplified equation for the shear design of conventional concrete beams as per ACI 318-11 provides highly conservative estimates of the shear strength of FRA concrete beams without shear reinforcement. From this and existing test results (Arezoumandi et al, 2014;Fathifazl et al, 2010;Gonzalez-Fonteboa and Martinez-Abella, 2007), it is concluded that aggregate type (i.e. natural aggregate or recycled aggregate) has little effect on the shear performance of reinforced concrete beams.…”

Section: Shear Performancementioning

confidence: 77%

Mechanical properties of ready-mixed concrete incorporating fine recycled aggregate

Jang

Kim

2015

Magazine of Concrete Research

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Experimental research was conducted to investigate the replacement ratio and water absorption of fine recycled aggregate (FRA) on the fresh and hardened properties of recycled aggregate concrete (RAC). Two types of FRA, originating from construction and demolition wastes of concrete structures, were used in this study -FRAL with a lower water absorption ratio of 5 . 83% and FRAH with a higher water absorption ratio of 7 . 95%. The fresh and hardened properties of RAC with different replacement levels of FRAL (0%, 30%, 60% and 100%) and FRAH (35% and 70%) were studied. In considering practical applications of FRA concrete, all the concretes were obtained from a local ready-mix plant in Daejeon, Korea. The paper reports the results of tests for slump, air content, compressive strength, splitting tensile strength, modulus of rupture, drying shrinkage, creep, flexural performance, shear performance and bond performance. The results show that the slump and compressive strength of ready-mixed concrete with 100% replacement of FRAL were 10% and 13% lower than the respective values for conventional concrete. RAC prepared with FRAH showed a more marked reduction in strength compared with the FRAL RAC. A replacement level of FRA of more than 30% has a negative effect on the drying shrinkage, creep and bond performance of concrete, whereas the shear and flexural performance of beams with 70% and 100% replacement of FRAH and FRAL were similar to those of conventional concrete beams. It may be concluded that, for structural concrete of medium compressive strength, the substitution of FRA with water absorption ratio in the range 5 . 8-8 . 0%does not seem to seriously affect the mechanical properties of concrete for replacement ratios up to 30%.

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Section: Shear Performancementioning

confidence: 77%

Mechanical properties of ready-mixed concrete incorporating fine recycled aggregate

Jang

Kim

2015

Magazine of Concrete Research

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“…A B C D I II III I II III I II III Minimum • Structural behaviour In view of the feasibility of using RA in concrete, some have taken the step forward of analysing its effect on the material's macro-structural behaviour. Generally, it has been observed that reinforced RAC exhibits similar failure mechanisms to those of a corresponding NAC element, whereas any potential slight decrease in structural performance can be correlated to the decline in the material's mechanical behaviour [34,35]. Also, even though structural RAC may exhibit similar load bearing capacity, it is quite probable that the recycled elements will exhibit a greater deflection [36].…”

Section: Recommendations For Further Researchmentioning

confidence: 99%

Current status on the use of recycled aggregates in concrete: Where do we go from here?

Brito¹,

Silva²

2016

RILEM Tech Lett

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The consumption of energy and natural resources has been growing exponentially with the significant increase of the economic and industrial activities of the semi-developed nations, becoming one of the major environmental concerns in our time. Several sectors are already pursuing cost-effective solutions to the problem of dumping waste, by reducing their production and adding value to them through their reuse or recycling them into new products, in view of a circular economy. Here, the current state of the recycled aggregates' application in the concrete industry is briefly reviewed, with a particular focus on the existing obstacles to their widespread use and lacking knowledge in general areas, which need to be further researched.

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“…In most of these studies, a decrease in the shear strength of beams made with RCA was observed when compared with beams made with NAC (Arezoumandi et. al, 2015;Arezoumandi et. 2014Arezoumandi et.…”

Section: Introductionmentioning

confidence: 98%

Effect of recycled concrete aggregate on the shear behavior of reinforced concrete panels

Zhang¹,

Kuder²,

Lehman³

et al. 2019

Sustainable Construction Materials and Technologies (SCMT)

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Due to its design versatility, availability, and cost efficiency, concrete continues to play a dominant role in the construction industry. Typical concrete production requires a significant amount of nonrenewable resources. One way to improve the sustainability of this material is to use recycled concrete aggregate (RCA) in place of virgin aggregate. The purpose of this study is to investigate the use of RCA in reinforced concrete panels. Three reinforced concrete panels were cast: normal concrete aggregate (NCA), 25% RCA, 50% RCA and 100% RCA. The data show the compressive strength and elastic modulus of the concrete are reduced with increasing amount of RCA, while the tensile strength does not change significantly. For the reinforced concrete panels, the shear response is affected by inclusion of RCA, with a reduction in the initial stiffness and also an earlier observance of the first crack.

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

Cited by 122 publications

References 9 publications

Mechanical properties of ready-mixed concrete incorporating fine recycled aggregate

Mechanical properties of ready-mixed concrete incorporating fine recycled aggregate

Current status on the use of recycled aggregates in concrete: Where do we go from here?

Effect of recycled concrete aggregate on the shear behavior of reinforced concrete panels

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