RT info:eu-repo/semantics/article
T1 Deformational behavior of self-compacting concrete containing recycled aggregate, slag cement and green powders under compression and bending: Description and prediction adjustment
A1 Revilla Cuesta, Víctor
A1 Ortega López, Vanesa
A1 Skaf Revenga, Marta
A1 Khan, Asadur Rehman
A1 Manso Villalaín, Juan Manuel
K1 Recycled aggregate self-compacting concrete
K1 Ground granulated blast-furnace slag
K1 Green aggregate powder
K1 Stress-strain/load-deflection curve
K1 Deformational-behavior prediction model
K1 Ingeniería civil
K1 Civil engineering
AB The high fine-aggregate content of Self-Compacting Concrete (SCC) means that its deformationalbehavior differs from that of vibrated concrete. SCC performance is further altered when industrial by-products are used as raw materials in those fractions. In this paper, the aim is to analyzeand to model the deformational behavior under compression and bending of SCC containing100% coarse and 0%, 50%, and 100% fine Recycled Aggregate (RA), limestone and RA greenaggregate powders sized 0/0.5 mm, and Ground Granulated Blast-furnace Slag (GGBS) cement.After the fresh and mechanical characterization of the 18 SCC mixes that were produced, theircompressive stress-strain and bending load-deflection curves were determined by continuouslyrecording the applied load and the strain/deflection values of the SCC test specimens. 100%coarse RA yielded deformability levels in accordance with international standards, while higherfine RA contents increased deformation under compression and reduced it under flexural stress.SCC stiffness increased when GGBS was added, due to the adjustment of the proportion ofcementitious matrix, while the use of limestone powder and, especially, RA powder had theopposite effect. Both compressive strain and flexural deflection were underestimated withexisting theoretical models. However, the incorporation in the models of both exponentialcorrection coefficients, dependent on the fine RA content, and partial adjustment coefficients,dependent on the types of cement and aggregate powder, produced optimal fits with the experimental stress-strain and load-deflection curves. In view of the deformational behavior, which wassuccessfully modelled with maximum deviations of ±10%, fine RA may be used in combinationwith GGBS and limestone powder, although it is recommended that fine RA should not exceedproportions of 50%.
PB Elsevier
SN 2352-7102
YR 2022
FD 2022-08
LK http://hdl.handle.net/10259/7422
UL http://hdl.handle.net/10259/7422
LA eng
NO The authors wish to express their gratitude for funding this research work to the Spanish Ministry of Universities, MICINN, AEI, EU, and ERDF [PID2020-113837RB-I00; 10.13039/501100011033; FPU17/03374]; the Junta de Castilla y Leon ´ (Regional Government) and ERDF [UIC-231]; and the University of Burgos [SUCONS, Y135. GI].
DS Repositorio Institucional de la Universidad de Burgos
RD 03-may-2024