Models for compressive strength estimation through non-destructive testing of highly self-compacting concrete containing recycled concrete aggregate and slag-based binder
| Autor: | R. Serrano-López, Vanesa Ortega-López, Marta Skaf, Víctor Revilla-Cuesta |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Ensayos (Tecnología) Testing Non-destructive testing 0211 other engineering and technologies Compressive strength 020101 civil engineering 02 engineering and technology 0201 civil engineering law.invention Hammer rebound index Ingeniería civil Ultrasonic pulse velocity law Nondestructive testing 021105 building & construction General Materials Science Civil engineering Hammer Composite material Civil and Structural Engineering Structural health monitoring Aggregate (composite) business.industry Ground Granulated Blast Furnace Slag Slag Building and Construction Ground granulated blast-furnace slag visual_art Recycled concrete aggregate Self-compacting concrete Building materials visual_art.visual_art_medium Materiales de construcción business |
| Zdroj: | Repositorio Institucional de la Universidad de Burgos (RIUBU) instname |
| ISSN: | 0950-0618 |
| DOI: | 10.1016/j.conbuildmat.2021.122454 |
| Popis: | 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]. |
| Databáze: | OpenAIRE |
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