RT info:eu-repo/semantics/article
T1 Hammer rebound index as an overall-mechanical-quality indicator of self-compacting concrete containing recycled concrete aggregate
A1 Revilla Cuesta, Víctor
A1 Ortega López, Vanesa
A1 Faleschini, Flora
A1 Espinosa González, Ana Belén
A1 Serrano López, Roberto
K1 Self-compacting concrete
K1 Recycled concrete aggregate
K1 Hammer rebound index
K1 Mechanical behavior
K1 Linear multiple regression
K1 Mechanical-quality indicator
K1 Ingeniería civil
K1 Civil engineering
K1 Materiales de construcción
K1 Building materials
AB The hammer rebound index has traditionally been solely and exclusively used to estimate the compressivestrength of vibrated concrete. Its use has recently been extended to the prediction of the compressive strength ofSelf-Compacting Concrete (SCC) and concrete produced with Recycled Concrete Aggregate (RCA). The conventional use of the hammer-rebound test is further developed in this paper, by demonstrating how it can be usedto estimate the overall mechanical behavior of SCC containing RCA. To do so, nine SCC mixes with differentcontents and fractions (coarse, fine, and powder) of RCA are analyzed. Following a simple-linear-regressionvalidation and property standardization procedure, the hammer rebound index is then expressed as a linearcombination of four mechanical properties, adjusted through a multiple regression. The hammer rebound indexis therefore expressed as a weighting of both the mean value of compressive behavior (arithmetic mean ofcompressive strength and modulus of elasticity) amounting to a weight of 72.8%, and the mean value of bendingtensile behavior (arithmetic mean of splitting tensile strength and flexural strength) amounting to a weight of27.2%. The hammer rebound index can therefore be construed as an overall-mechanical-quality performanceindicator of the SCC containing RCA, which can also yield predictions of every mechanical property. In this way,the application of the hammer rebound index could likewise be of use in rehabilitation, pathology, and healthmonitoring works where a full characterization of the mechanical performance of SCC with RCA is required,facilitating the use of SCC with RCA in real structures.
PB Elsevier
SN 0950-0618
YR 2022
FD 2022-09
LK http://hdl.handle.net/10259/7482
UL http://hdl.handle.net/10259/7482
LA eng
NO The authors wish to express their gratitude to the following government ministries, agencies, and universities for funding this research: the Spanish Ministry of Universities, MICIN, AEI, EU, ERDF and NextGenerationEU/ PRTR [PID2020-113837RB-I00; 10.13039/501100011033; TED2021- 129715B-I00; FPU17/03374; PRX21/00007]; the Junta de Castilla y León (Regional Government) and ERDF [UIC-231, BU119P17]; the University of Burgos [SUCONS, Y135.GI]; and, finally, the University of Padova.
DS Repositorio Institucional de la Universidad de Burgos
RD 11-dic-2024