RT info:eu-repo/semantics/article
T1 Statistical Approach for the Design of Structural Self-Compacting Concrete with Fine Recycled Concrete Aggregate
A1 Revilla Cuesta, Víctor
A1 Skaf Revenga, Marta
A1 Espinosa González, Ana Belén
A1 Santamaría, Amaia
A1 Ortega López, Vanesa
K1 Self-compacting concrete (SCC)
K1 Recycled concrete aggregate (RCA)
K1 RCA content optimization
K1 Robustness
K1 Analysis of variance (ANOVA)
K1 Compressive strength prediction
K1 Characteristic compressive strength
K1 Distribution fitting
K1 Ingeniería civil
K1 Civil engineering
K1 Materiales de construcción
K1 Building materials
AB The compressive strength of recycled concrete is acknowledged to be largely conditionedby the incorporation ratio of Recycled Concrete Aggregate (RCA), although that ratio needs to becarefully assessed to optimize the design of structural applications. In this study, Self-CompactingConcrete (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 astatistical analysis of their strength variations, which exhibited robustness and normality accordingto the common statistical procedures. The results of the confidence intervals, the one-factor ANalysisOf VAriance (ANOVA), and the Kruskal–Wallis test showed that an increase in fine RCA contentdid not necessarily result in a significant decrease in strength, although the addition of fine RCAdelayed the development of the final strength. The statistical models presented in this research canbe used to define the optimum incorporation ratio that would produce the highest compressivestrength. Furthermore, the multiple regression models offered accurate estimations of compressivestrength, considering the interaction between the incorporation ratio of fine RCA and the curing ageof 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 oncurrent standards, which clearly underestimated the compressive strength of SCC manufactured withfine RCA and require adjustment to take full advantage of these recycled materials. This analysiscould be carried out on any type of waste and concrete, which would allow one to evaluate the sameaspects as in this research and ensure that the use of recycled concrete maximizes both sustainabilityand strength.
PB MDPI
YR 2020
FD 2020-12
LK http://hdl.handle.net/10259/7980
UL http://hdl.handle.net/10259/7980
LA eng
NO This research was funded by the following entities and grants: Spanish Ministry MCI, AEI, EU, and ERDF, grants FPU17/03374 and RTI2018-097079-B-C31; the Junta de Castilla y León and ERDF, grant BU119P17 awarded to research group UIC-231; Youth Employment Initiative (JCyL) and ESF, grant UBU05B_1274; the University of Burgos, grant Y135 GI awarded to the SUCONS group; the University of the Basque Country, grant PPGA20/26; the Basque Government research group IT1314-19.
DS Repositorio Institucional de la Universidad de Burgos
RD 11-may-2024