Structural concrete with simultaneous incorporation of fine and coarse recycled concrete aggregates: Mechanical, durability and long-term properties

Pedro, D.; Brito, Jorge de; Evangelista, Luís

doi:10.1016/j.conbuildmat.2017.07.215

Cited by 242 publications

(107 citation statements)

References 44 publications

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“…The higher slumps for concrete containing coarse RA may also be attributed to the loss of finer materials. First, it contributes to the lower amount of adhered mortar content which has been found to decrease workability of concrete containing RCA due to higher absorption and rougher surface . Second, finer materials have higher water demand than larger particles as there is more surface area to wet.…”

Section: Resultsmentioning

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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Section: Resultsmentioning

confidence: 99%

“…This may be attributed to the washing motion of the reclaimer which would wash out the finer materials into the gray water . Therefore, more adhered mortar content accumulates in the finer fractions of RCA which may contribute to lower adhered mortar content for coarse RA …”

Section: Aggregate Testingmentioning

confidence: 99%

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

Far

2019

Structural Concrete

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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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“…Fine RCA has higher quantity of adhered cement paste content than coarse RCA with a consequent increase in water absorption and decrease in density [15]. ese negative effects make their utilization very restricted or even banned [20]. ese limitations bring to a relative limited literature in using fine RCA [21], whereas there are many studies on the substitution of cement by powders produced from wastes or by-products.…”

Section: Introductionmentioning

confidence: 99%

Bricks and Concrete Wastes as Coarse and Fine Aggregates in Sustainable Mortars

Mobili

Giosuè

Corinaldesi

et al. 2018

Advances in Materials Science and Engineering

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The total substitution by volume of natural coarse calcareous aggregate by coarse recycled brick aggregate (RBA) and coarse recycled concrete aggregate (RCA) has been investigated to produce more sustainable and environment-friendly mortars. Aggregates were also partially substituted by their fines at 12.5% by volume. Mortars have been tested in terms of mechanical, microstructural, and durability properties. Results show that it is feasible to replace a natural calcareous aggregate entirely by recycled aggregates. In particular, the obtained mortars, even if more porous and more prone to the water capillary absorption than that manufactured with natural aggregates, result in less stiffness and thus are less subjected to crack formation, more permeable to water vapour, and less susceptible to sulphate attack.

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Structural concrete with simultaneous incorporation of fine and coarse recycled concrete aggregates: Mechanical, durability and long-term properties

Cited by 242 publications

References 44 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

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

Bricks and Concrete Wastes as Coarse and Fine Aggregates in Sustainable Mortars

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