Experimental studies on utilization of recycled coarse and fine aggregates in high performance concrete mixes

Kumar, Barun; Ananthan, H.; Balaji, K V

doi:10.1016/j.aej.2017.05.003

Cited by 37 publications

(18 citation statements)

References 7 publications

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“…After 30 days of immersion in the solution, the decrease in the mass of the samples was almost zero. For comparison, in other studies [71], the reduction in weight of recycled concrete (based on concrete waste aggregates) cubes after 30 days of immersion in 3% H 2 SO 4 was about 5.24%. Gireesh [72], in turn, proved that loss of weight in recycled concrete (based on aluminum dross aggregates) mixes due to acid attack (5% H 2 SO 4 ) was in the range of 1.06–2.23%.…”

Section: Resultsmentioning

confidence: 79%

“…Weakening of the structure of composites based on red ceramics and gravel was caused by the fact that after 40 days of the experiment, the solution started to have a destructive effect on the aggregate grains. For comparison, in other studies [71], the reduction in compressive strength of recycled concrete (based on concrete waste aggregates) cubes after 30 days of immersion in 3% H 2 SO 4 was about 43.86%. Gireesh [72], in turn, proved that loss in compressive strength of recycled concrete (based on aluminum dross aggregates) mixes due to acid attack (5% H 2 SO 4 ) was in the range of 1.78–5.11%.…”

Section: Resultsmentioning

confidence: 81%

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Analysis of the Effects of Aggressive Environments Simulating Municipal Sewage on Recycled Concretes Based on Selected Ceramic Waste

et al. 2018

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This paper presents the results of research aimed at finding the possible ways of disposing of ceramic waste material, focusing mainly on the possibility of using it as aggregates in concretes exposed to an aggressive chemical environment (municipal sewage). The research part presents the preparation method and investigation of waste ceramic aggregates (red, glazed and sanitary ceramic aggregates). A suitable ratio of coarse to fine aggregates was selected, and their density, absorptivity and crushing strength were examined. All examined aggregates were also subjected to SEM analysis. Red ceramic aggregate is characterized by a greater degree of crushing compared to glazed and sanitary ceramic aggregate, by 205.7% and 439.4%, respectively. Another part of the research was to compare the properties of concrete with traditional aggregate (gravel, basalt) and with ceramic waste aggregate. The tested parameters included consistency, apparent density, absorptivity, flexural and compressive strengths of concretes. The study proved that the absorptivity of recycled composites is higher than that of traditional composites by 20.8–24.7%. The concrete based on sanitary ceramic waste has the highest strength parameters. Its compressive strength is higher by 10.5% and flexural strength by 5.9% compared with the basalt aggregate concrete. The compressive strength of sanitary ceramics concrete is higher by 42% and by 59% compared with concrete based on glazed ceramic and red ceramic aggregate, respectively. The last part of the research was to examine the resistance of concrete to aggressive environment. The scope of the work included the preparation of the research environment in the form of solutions with an increased concentration of aggressive agents (hydronium, sulfate, magnesium, ammonium ions). Among the concretes with ceramic aggregate, the highest decrease in the compressive strength was demonstrated by the concrete based on red ceramics (128.2%), while the smallest was demonstrated by the concrete based on sanitary ceramics (aggregate from sanitary ceramics (15.4%). The mass loss at different time intervals and compressive strength loss of samples stored in solutions were tested. The smallest weight loss caused by aggressive environment attack was recorded in the concrete based on ceramic sanitary and glazed aggregate (20.2% and 34.5%, respectively, after 120 days of aggressive environment).

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Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 81%

Analysis of the Effects of Aggressive Environments Simulating Municipal Sewage on Recycled Concretes Based on Selected Ceramic Waste

et al. 2018

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“…Similar results are reported in the literature. Vinay Kumar et al 25 reported that the reduction in weight and compressive strength of concrete made with 20% RCA + RFA were 5.24% and 43.86%, respectively. The porous microstructure results the increase in ingress of acid and make the concrete more susceptible to acid attack.…”

Section: Resultsmentioning

confidence: 99%

“…However, these losses could be significantly lowered by the addition of 0–2 mm natural aggregate or by the addition of superplasticizer in RAC. Vinay Kumar et al 25 studied the properties of high performance concrete by incorporating 20% recycled coarse, fine and combination of coarse and fine aggregates separately. It was reported that the compressive strength of RAC with 20% recycled fine aggregate had yielded 18% more than the control concrete at 28 days, whereas, the strength was reduced by 2% when recycled coarse aggregate used.…”

Section: Introductionmentioning

confidence: 99%

Influence of brick dust, stone dust, and recycled fine aggregate on properties of natural and recycled aggregate concrete

Rao

2020

Structural Concrete

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The brick, stone, and construction industries produces huge quantities of non‐biodegradable waste materials and incorporation of such waste materials in concrete eventually leads to the green and sustainable construction. The present paper study the effect of partial substitution of brick dust (BD), stone dust (SD), and recycled fine aggregate (RFA) as fine aggregate on the properties of natural aggregate concrete (NAC) and recycled aggregate concrete (RAC). In the present investigation, two groups of mixes were considered: Group A consists of 100% natural coarse aggregate (NCA) and group B consists of 50% NCA and 50% recycled coarse aggregate. In each group, the natural fine aggregate was partially replaced with 30% BD, 30% SD, and 30% RFA separately. All mixes were designed for M25 grade concrete with a constant w/c ratio of 0.45. The properties viz. compressive strength, density, indirect tensile strength, water absorption, ultrasonic pulse velocity of all mixes was performed. Also, durability performance of all the mixes under acid conditions viz.: HCl and H2SO4 solutions were studied. From the results it was found that the compressive strength and split tensile strengths (27.95–23.23%) of both natural and recycled aggregate concrete were significantly increased with the partial substitution of SD. Also, the results reveal that the water absorption decreased by 57.14–69.64% and 4.67–34.67%, respectively, when the replacement of NFA with BD and SD in both NAC and RAC. Both natural and recycled aggregate concrete were more susceptible for H2SO4 than HCl acid in terms of loss of weight and compressive strength.

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“…Recently, there was a shift in the direction of the research concerning recycled aggregates focusing more on RFA made with glass, lightweight materials, etc. The reason is that these studies [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] recommended not to include CDW as RFA anymore just on the basis of its functional properties. For that reason, in this study, the applicability of RFA in concrete in terms of all parameters (quality, environmental impact, energy consumption, toxicity and cost) was considered.…”

Section: Introductionmentioning

confidence: 99%

A Critical Review on the Influence of Fine Recycled Aggregates on Technical Performance, Environmental Impact and Cost of Concrete

Hafez

Kurda

et al. 2020

Applied Sciences

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The aim of this critical review is to show the applicability of recycled fine aggregates (RFA) in concrete regarding technical performance, environmental impact, energy consumption and cost. It is not possible to judge the performance of concrete by considering one dimension. Thus, this study focussed on the fresh and hardened (e.g., mechanical and durability) properties and environmental and economic life cycle assessment of concrete. Most literature investigated showed that any addition of recycled fine aggregates from construction and demolition waste as a replacement for natural fine aggregates proves detrimental to the functional properties (quality) of the resulting concrete. However, the incorporation of recycled fine aggregates in concrete was proven to enhance the environmental and economic performance. In this study, an extensive literature review based multi criteria decision making analysis framework was made to evaluate the effect of RFA on functional, environmental, and economic parameters of concrete. The results show that sustainability of RFA based concrete is very sensitive to transportation distances. Several scenarios for the transportation distances of natural and recycled fine aggregates and their results show that only if the transportation distance of the natural aggregates is more than double that of RFA, e the RFA based concrete alternatives would be considered as more sustainable.

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Experimental studies on utilization of recycled coarse and fine aggregates in high performance concrete mixes

Cited by 37 publications

References 7 publications

Analysis of the Effects of Aggressive Environments Simulating Municipal Sewage on Recycled Concretes Based on Selected Ceramic Waste

Analysis of the Effects of Aggressive Environments Simulating Municipal Sewage on Recycled Concretes Based on Selected Ceramic Waste

Influence of brick dust, stone dust, and recycled fine aggregate on properties of natural and recycled aggregate concrete

A Critical Review on the Influence of Fine Recycled Aggregates on Technical Performance, Environmental Impact and Cost of Concrete

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