2026-09-20T22:39:37Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/61872022-11-24T01:05:34Zcom_10259_6171com_10259_5086com_10259_2604col_10259_6172

Revilla Cuesta, Víctor Skaf Revenga, Marta Serrano López, Roberto Ortega López, Vanesa 2021-11-19T09:17:27Z 2021-11-19T09:17:27Z 2021-04 0950-0618 http://hdl.handle.net/10259/6187 10.1016/j.conbuildmat.2021.122454 Indirect estimation of compressive strength through non-destructive testing is key to monitoring the strength of structural concretes used in construction and rehabilitation works. However, no models are available to perform this estimation in highly Self-Compacting Concrete (SCC) with Recycled Concrete Aggregate (RCA). To fill this gap, two indirect measures were tested in this paper, the hammer rebound index and Ultrasonic Pulse Velocity (UPV), to predict the compressive strength of highly SCC. To do so, 24 SCC mixes were developed with different aggregate powders, binders, such as Ground Granulated Blast Furnace Slag (GGBFS), and contents of fine RCA. Compressive strength, and both indirect measures of all mixtures were determined at 1, 7, 28, and 90 days. The development of specific models for highly SCC responded to the inappropriateness of conventional models that are not adapted to its high fines content. Modelling as a function of either UPV or the hammer rebound index yielded accurate predictions, although the UPV model proved more sensitive to compositional changes and presented higher uncertainty. The best predictions were modelled by combining both indirect measures. The models provided safe and accurate indirect estimations of the compressive strength of high flowability SCC in real structures. Spanish Ministry MCIU, AEI and ERDF [grant number FPU17/03374]; the Junta de Castilla y León (Regional Government) and ERDF [grant number UIC-231, BU119P17]; Youth Employment Initiative (JCyL) and ESF [grant number UBU05B_1274]; and, finally, the University of Burgos [grant number SUCONS, Y135.GI]. eng Elsevier Construction and Building Materials. 2021, V. 280, 122454 https://doi.org/10.1016/j.conbuildmat.2021.122454 info:eu-repo/grantAgreement/MICIU/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FPU17%2F03374 info:eu-repo/grantAgreement/Junta de Castilla y León//BU119P17//Innovación Competitiva en la Utilización de Escorias Siderúrgicas para la elaboración de Hormigones de Altas Prestaciones. Aplicaciones en la Industrialización info:eu-repo/grantAgreement/Junta de Castilla y León//UBU05B_1274 info:eu-repo/grantAgreement/UBU//Y135.GI Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Recycled concrete aggregate Self-compacting concrete Non-destructive testing Hammer rebound index Ultrasonic pulse velocity Ground Granulated Blast Furnace Slag Structural health monitoring Compressive strength Ingeniería civil Materiales de construcción Ensayos (Tecnología) Civil engineering Building materials Testing Models for compressive strength estimation through non-destructive testing of highly self-compacting concrete containing recycled concrete aggregate and slag-based binder info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion