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Acoustic and Thermal Analyses of Self-Consolidating Lightweight Rubberized Concretes

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Autor(es):
Angelin, A. F. ; de Miranda Junior, E. J. P. ; dos Santos, J. M. C. ; Osorio, W. R. ; Lintz, R. C. Cecche ; Gachet, L. A.
Número total de Autores: 6
Tipo de documento: Artigo Científico
Fonte: ACI MATERIALS JOURNAL; v. 119, n. 6, p. 12-pg., 2022-11-01.
Resumo

Self-consolidating concretes (SCCs) have been widely studied in recent years. However, investigations concerning self -consolidating lightweight rubberized concrete (SCLRC) are scarce. This paper focuses on both the expanded clay and waste tire rubber contents. Both the fresh and hardened properties are evaluated. Additionally, the thermal and acoustic properties are also analyzed. Because the expanded clay has a rounded shape without edges or tips, presenting a smooth and glassy surface, it improves the workability and spreading of the concrete. Also, the mechanical behavior, together with the lightweight effect and asso-ciated with thermal conductivity, is a remarkable property attained. The rubber acts negatively on the properties in the fresh state of SCLRC. The compressive strength of SCLRC is lower than that of conventional SCC. It is found that with the use of light aggregates, which are replaced with conventional aggregates, an increase of approximately 50% in the acoustic attenuation and a decrease of 70% in the thermal conductivity are attained. This induces better thermal and acoustic insulation than the conventional concrete associated with being environmentally friendly. (AU)

Processo FAPESP: 18/12076-5 - Estudo da absorção acústica de barreiras de concreto contendo resíduos de borracha e vermiculita
Beneficiário:Rosa Cristina Cecche Lintz
Modalidade de apoio: Auxílio à Pesquisa - Regular
Processo FAPESP: 18/15894-0 - Projeto e otimização de estruturas periódicas para aprimoramento de desempenho vibroacústico
Beneficiário:Carlos de Marqui Junior
Modalidade de apoio: Auxílio à Pesquisa - Temático
Processo FAPESP: 18/14945-0 - Concreto autoadensável leve com argila expandida e poliestireno expandido
Beneficiário:Luísa Andréia Gachet
Modalidade de apoio: Auxílio à Pesquisa - Regular