2026-07-01T22:54:03Zhttps://riubu.ubu.es/oai/request

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

00925njm 22002777a 4500 dc Revilla Cuesta, Víctor author Skaf Revenga, Marta author Serrano López, Roberto author Ortega López, Vanesa author 2021-04 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. 0950-0618 http://hdl.handle.net/10259/6187 10.1016/j.conbuildmat.2021.122454 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 Models for compressive strength estimation through non-destructive testing of highly self-compacting concrete containing recycled concrete aggregate and slag-based binder