2026-10-29T13:50:07Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/74822023-04-17T11:46:18Zcom_10259_6171com_10259_5086com_10259_2604col_10259_6172

00925njm 22002777a 4500 dc Revilla Cuesta, Víctor author Ortega López, Vanesa author Faleschini, Flora author Espinosa González, Ana Belén author Serrano López, Roberto author 2022-09 The hammer rebound index has traditionally been solely and exclusively used to estimate the compressive strength of vibrated concrete. Its use has recently been extended to the prediction of the compressive strength of Self-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 used to estimate the overall mechanical behavior of SCC containing RCA. To do so, nine SCC mixes with different contents and fractions (coarse, fine, and powder) of RCA are analyzed. Following a simple-linear-regression validation and property standardization procedure, the hammer rebound index is then expressed as a linear combination of four mechanical properties, adjusted through a multiple regression. The hammer rebound index is therefore expressed as a weighting of both the mean value of compressive behavior (arithmetic mean of compressive 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 of 27.2%. The hammer rebound index can therefore be construed as an overall-mechanical-quality performance indicator 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. 0950-0618 http://hdl.handle.net/10259/7482 10.1016/j.conbuildmat.2022.128549 Self-compacting concrete Recycled concrete aggregate Hammer rebound index Mechanical behavior Linear multiple regression Mechanical-quality indicator Hammer rebound index as an overall-mechanical-quality indicator of self-compacting concrete containing recycled concrete aggregate