Enhancing mechanical and durability properties of recycled aggregate concrete

Dimitriou, George; Savva, Pericles; Petrou, Michael F.

doi:10.1016/j.conbuildmat.2017.09.137

Cited by 399 publications

(126 citation statements)

References 16 publications

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“…With an increase in coarse RA content there was an increase in workability, except for A100%, which still has a significantly higher slump than A0%. These results correlate with Dimitriou et al who investigated the treatment of RCA by washing the aggregates and achieved an increase in workability due to the cleaner and rounder RCA aggregates. The higher slumps for concrete containing coarse RA may also be attributed to the loss of finer materials.…”

Section: Resultssupporting

confidence: 87%

“…The hesitation to adopt a reclaimer can be partly attributed to the limited amount of information available on RAs . Utilization of RAs in concrete applications can be considered an alternative source for aggregates due to having noticeable potential for economical savings and reduction of environmental impacts, thus it appears to be worth investigating .…”

Section: Introductionmentioning

confidence: 99%

“…Coarse RA may also have lower amount of adhered mortar content in comparison with RCA. Dimitriou et al investigated enhancement of the properties of RCA by washing the aggregates in a modified concrete mixer. They observed that the treated RCA were cleaner and performed better in all tests, reaching or even surpassing the properties of concrete mixture containing NA.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation on properties of coarse reclaimed aggregates and their effects on concrete strength and workability

Far

2019

Structural Concrete

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Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation on properties of coarse reclaimed aggregates and their effects on concrete strength and workability

Far

2019

Structural Concrete

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“…is will also alleviate disposal problem of this waste product. A number of studies have been reported in the available literature regarding the use of demolished concrete as aggregate [2][3][4][5][6][7][8][9][10][11][12][13]. However, many of those studies have found degradation in mechanical and durability properties when natural aggregate (NA) was replaced by decreased compressive strength, indirect shear strength, and modulus of elasticity in recycled aggregate concrete (RAC) observed by Rahal [3].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Durability Properties of Induction‐Furnace‐Slag‐Incorporated Recycled Aggregate Concrete

Ahmad

Rahman

2018

Advances in Civil Engineering

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Most of the steel mills in Bangladesh use induction furnace which produces large quantities of slags that have very little use except land filling. Therefore, feasibility of using this slag is examined in concrete with recycled aggregate, which is another waste product that is generated due to removal of old structures. Concrete with three target strengths, 17.23, 20.68, and 24.13 MPa, was prepared using recycled concrete acquired from a recently demolished building in Dhaka, Bangladesh. Recycled coarse aggregate was replaced with induction furnace slag by 0%, 25%, 50%, 75%, and 100% for each target strength. Samples prepared from these concretes were tested for workability, compressive strength, splitting tensile strength, modulus of elasticity, and durability properties e.g., porosity, absorption, and rapid chloride penetration. Review of test results suggests that workability of concrete was not adversely affected by incorporation of induction furnace slag. For up to 50% of induction furnace slag replacement, both compressive strength and splitting tensile strength increased in recycled aggregate concrete. Further, for all ratios of induction furnace slag replacement, modulus of elasticity increased compared to 100% recycled aggregate concrete. Porosity and absorption also decreased in concrete where up to 50% of recycled aggregate was replaced by induction furnace slag. Considering these, it is concluded that 50% of recycled aggregate can be replaced by induction furnace slag that will result in superior mechanical and durability properties in recycled aggregate concrete.

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“…Nowadays, a lot of researches about the high-volume mineral admixture concrete have been done. Some studies have shown that the chloride diffusion coefficient is decreasing with the proportion of mineral admixture [5]. Other studies [6], which are focus about durability of the high-volume mineral admixture concrete cured for 7 days, 28 days and 90 days.…”

Section: Introductionmentioning

confidence: 99%

A Multi-factor Model of Chloride Diffusion Coefficient of 180d Cured Concrete with High-volume Mineral Admixture

Chen¹,

Xia²,

Tang³

et al. 2018

dtetr

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This paper describes a multi-factor model of chloride diffusion coefficient of long-age (180d) cured concrete with high-volume mineral admixture. The RCM (rapid chloride migration) tests were conducted on 15 specimens with different mixtures proportions to analyze the effect of the water/binder ratio, the total content of mineral admixture, the different combination of FA (fly ash) and GGBS (ground granulated blast-furnace slag) on the chloride diffusion coefficient. Based on the data of orthogonal experiments, a multi-factor coupling model of chloride diffusion coefficient of 180d cured concrete is developed through regression analysis, which can be verified by the data in full range design. The experimental results show that the water/binder ratio, the content of FA and GGBS have a certain impact on the chloride diffusion coefficient, and the predicted values from multi-factor coupling model of chloride diffusion coefficient is in good agreement with the experimental data.

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Enhancing mechanical and durability properties of recycled aggregate concrete

Cited by 399 publications

References 16 publications

Investigation on properties of coarse reclaimed aggregates and their effects on concrete strength and workability

Investigation on properties of coarse reclaimed aggregates and their effects on concrete strength and workability

Mechanical and Durability Properties of Induction‐Furnace‐Slag‐Incorporated Recycled Aggregate Concrete

A Multi-factor Model of Chloride Diffusion Coefficient of 180d Cured Concrete with High-volume Mineral Admixture

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