Effect of fine recycled concrete aggregate on the mechanical behavior of self-compacting concrete

Revilla‐Cuesta, Víctor; Ortega-López, Vanesa; Skaf, Marta; Manso, Juan Manuel García

doi:10.1016/j.conbuildmat.2020.120671

Cited by 85 publications

(52 citation statements)

References 52 publications

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“…Furthermore, homogeneous groups may be identified, i.e., values of a factor with the same effect on the slump flow and viscosity of the SCC. This analysis was performed at the standard significance level of 5% (Revilla-Cuesta et al, 2020a). The results (Table 5) showed that if the water absorption of the RCA is maximized (a shared objective of both the mix design and the mixing process), its negative effect on the temporal evolution of SCC flowability may not be significant:…”

Section: Discussionmentioning

confidence: 99%

“…On the one hand, they all incorporated 100% coarse RCA. This content was defined on the basis of the high compressive strength of the SCC that was manufactured with this amount of waste together with 100% fine NA, as demonstrated in another study by the authors (Revilla-Cuesta et al, 2020a). On the other, the fine RCA 0/4 mm was simultaneously added in substitution of the siliceous sand 0/4 mm, a commonly used practice in the industrial manufacture of precast concrete (Fiol et al, 2018).…”

Section: Designmentioning

confidence: 99%

“…While concrete with a high compressive strength of over 45 MPa was obtained with 100% coarse RCA, the addition of fine RCA had more adverse effects, even at low-level replacements of 30% (Silva et al, 2015). Nevertheless, the optimization of the mix design with 100% coarse RCA, 50% fine RCA, and standard amounts of cement yielded an SCC with a slump flow of between 650 and 750 mm (SF2 slump-flow class) and a compressive strength of over 45 MPa (Revilla-Cuesta et al, 2020a).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temporal flowability evolution of slag-based self-compacting concrete with recycled concrete aggregate

Revilla‐Cuesta

Skaf

Santamarı́a

et al. 2021

Journal of Cleaner Production

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Section: Discussionmentioning

confidence: 99%

Section: Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Temporal flowability evolution of slag-based self-compacting concrete with recycled concrete aggregate

Revilla‐Cuesta

Skaf

Santamarı́a

et al. 2021

Journal of Cleaner Production

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“…Total aggregate plays a vital role in determining the dimensional stability apart from fresh and hardened properties of concrete, which occupies 65% to 70% in total volume [51]. The ingredients of the concrete mix are packed properly only when the distribution of total aggregates in a given volume is properly maintained.…”

Section: Impact Of Ta/c Ratio On Strength Ratiomentioning

confidence: 99%

Impact of Design Parameters on the Ratio of Compressive to Split Tensile Strength of Self-Compacting Concrete with Recycled Aggregate

Martínez‐García

Jagadesh²,

Búrdalo

et al. 2021

Materials

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Most concrete studies are concentrated on mechanical properties especially strength properties either directly or indirectly (fresh and durability properties). Hence, the ratio of split tensile strength to compressive strength plays a vital role in defining the concrete properties. In this review, the impact of design parameters on the strength ratio of various grades of Self-Compacting Concrete (SCC) with recycled aggregate is assessed. The design parameters considered for the study are Water to Cement (W/C) ratio, Water to Binder (W/B) ratio, Total Aggregates to Cement (TA/C) ratio, Fine Aggregate to Coarse Aggregate (FA/CA) ratio, Water to Solid (W/S) ratio in percentage, superplasticizer (SP) content (kg/cu.m), replacement percentage of recycled coarse aggregates (RCA), replacement percentage of recycled fine aggregates (RFA), fresh density and loading area of the specimen. It is observed that the strength ratio of SCC with recycled aggregates is affected by design parameters.

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“…Table 16 shows the characteristic strength according to the normal distribution and the best-fit distribution (Weibull or gamma) for each mixture. In addition, this table also shows the normalized value according to the Spanish Instruction of Structural Concrete EHE-08 [29], calculated by approximating the value obtained to the standard series (20,25,30,35,40,45,50,55,60,70,80,90, and 100 MPa). Figure 10 shows the calculation of the 5% percentile for each mixture in the best-fit distribution (Weibull or gamma).…”

Section: Normal Distributionmentioning

confidence: 99%

Statistical Approach for the Design of Structural Self-Compacting Concrete with Fine Recycled Concrete Aggregate

et al. 2020

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The compressive strength of recycled concrete is acknowledged to be largely conditioned by the incorporation ratio of Recycled Concrete Aggregate (RCA), although that ratio needs to be carefully assessed to optimize the design of structural applications. In this study, Self-Compacting Concrete (SCC) mixes containing 100% coarse RCA and variable amounts, between 0% and 100%, of fine RCA were manufactured and their compressive strengths were tested in the laboratory for a statistical analysis of their strength variations, which exhibited robustness and normality according to the common statistical procedures. The results of the confidence intervals, the one-factor ANalysis Of VAriance (ANOVA), and the Kruskal–Wallis test showed that an increase in fine RCA content did not necessarily result in a significant decrease in strength, although the addition of fine RCA delayed the development of the final strength. The statistical models presented in this research can be used to define the optimum incorporation ratio that would produce the highest compressive strength. Furthermore, the multiple regression models offered accurate estimations of compressive strength, considering the interaction between the incorporation ratio of fine RCA and the curing age of concrete that the two-factor ANOVA revealed. Lastly, the probability distribution predictions, obtained through a log-likelihood analysis, fitted the results better than the predictions based on current standards, which clearly underestimated the compressive strength of SCC manufactured with fine RCA and require adjustment to take full advantage of these recycled materials. This analysis could be carried out on any type of waste and concrete, which would allow one to evaluate the same aspects as in this research and ensure that the use of recycled concrete maximizes both sustainability and strength.

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Effect of fine recycled concrete aggregate on the mechanical behavior of self-compacting concrete

Cited by 85 publications

References 52 publications

Temporal flowability evolution of slag-based self-compacting concrete with recycled concrete aggregate

Temporal flowability evolution of slag-based self-compacting concrete with recycled concrete aggregate

Impact of Design Parameters on the Ratio of Compressive to Split Tensile Strength of Self-Compacting Concrete with Recycled Aggregate

Statistical Approach for the Design of Structural Self-Compacting Concrete with Fine Recycled Concrete Aggregate

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