High strength self-compacting concrete as thin slabs: a car parking field study Concreto autoadensável de alta resistência para placas delgadas: estudo de caso para estacionamento de automóveis
Tipo
Artigo
Data de publicação
2025
Periódico
Revista IBRACON de Estruturas e Materiais
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0
Autores
Balbo J.T.
Cargnin A.P.
da Silva E.R.
da Fonseca Junior E.S.
Blank L.O.
Cargnin A.P.
da Silva E.R.
da Fonseca Junior E.S.
Blank L.O.
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© 2025, IBRACON - Instituto Brasileiro do Concreto. All rights reserved.This paper evaluates the aspects of dosage, construction, quality control, and functional and structural quality of self-compacting concrete (SCC) paving slabs built in a vehicle parking area, on a flat surface, with reduced thickness (100 mm). The previously established target for slump flow for applying 8 m3 SCC was agility; aspects related to shrinkage and surface are discussed herein, as well as other lessons learned in a preliminary study. The surface and structural characteristics resulting from the pioneer application were verified by texture tests and dynamic load tests (Falling Weight Deflectometer). The strength and stiffness results were indicative of the SCC's superior quality in terms of durability to fatigue. The stress analysis based on the measured parameters for the concrete slabs indicated the full possibility of using SCC, with economic advantages due to the significant reduction in design thickness, for automobile parking lots, resulting in very low stresses (under 20% of the flexural strength). Regarding deflections, the values measured are about twice the values commonly found for conventional concrete pavements because of the thin slab thickness. Finally, an expressively lower modular relationship (E/MR) was obtained revealing the potential of SCC to perform better than conventional concrete in face of fatigue damage.