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Self-Compacting Concrete is a type of concrete characterized by its high flow ability in the fresh state, which makes it very sensitive to changes in its composition. The use of Recycled Concrete Aggregate (RCA) for its manufacture affects its compressive strength, although this effect is highly conditioned by the characteristics of RCA itself as well as by the composition of the mix. This bibliographical review aims to analyze in detail the most common aspects that cause the effect of RCA on the compressive strength of SCC not to be always the same. Thus, the bibliographical analysis reveals that, although the compressive strength decreases linearly with the RCA content if the flow ability of the SCC remains constant, this reduction is smaller when only coarse RCA is used. In addition, the use of RCA obtained from concrete of higher strength reduces this decrease, as well as the non-compensation of the water additionally absorbed by the RCA. The internal curing and the interaction of the RCA with different aggregate powders and mineral additions are factors that also favor this dispersion. The difficulty in defining the effect of adding RCA to SCC results in the need to experimentally study the particular effect of RCA on SCC in each case to ensure that it meets the requirements established.
victor_revilla-cuesta. 2021. \u201cCompressive-Strength Dispersion of Recycled Aggregate Self- Compacting Concrete\u201d. Global Journal of Research in Engineering - E: Civil & Structural GJRE-E Volume 21 (GJRE Volume 21 Issue E2): .
Crossref Journal DOI 10.17406/gjre
Print ISSN 0975-5861
e-ISSN 2249-4596
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Total Score: 105
Country: Unknown
Subject: Global Journal of Research in Engineering - E: Civil & Structural
Authors: Víctor Revilla-Cuesta, Vanesa Ortega-López, Marta Skaf, Francisco Fiol, Juan M. Manso (PhD/Dr. count: 0)
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Publish Date: 2021 05, Mon
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Self-Compacting Concrete is a type of concrete characterized by its high flow ability in the fresh state, which makes it very sensitive to changes in its composition. The use of Recycled Concrete Aggregate (RCA) for its manufacture affects its compressive strength, although this effect is highly conditioned by the characteristics of RCA itself as well as by the composition of the mix. This bibliographical review aims to analyze in detail the most common aspects that cause the effect of RCA on the compressive strength of SCC not to be always the same. Thus, the bibliographical analysis reveals that, although the compressive strength decreases linearly with the RCA content if the flow ability of the SCC remains constant, this reduction is smaller when only coarse RCA is used. In addition, the use of RCA obtained from concrete of higher strength reduces this decrease, as well as the non-compensation of the water additionally absorbed by the RCA. The internal curing and the interaction of the RCA with different aggregate powders and mineral additions are factors that also favor this dispersion. The difficulty in defining the effect of adding RCA to SCC results in the need to experimentally study the particular effect of RCA on SCC in each case to ensure that it meets the requirements established.
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