Acoustic and Thermal Analyses of Self-Consolidating Lightweight Rubberized Concretes

Author(s)

Angelin, A. F. ; de Miranda Junior, E. J. P. ; dos Santos, J. M. C. ; Osorio, W. R. ; Lintz, R. C. Cecche ; Gachet, L. A.

• Document type: Journal article
• Source: ACI MATERIALS JOURNAL; v. 119, n. 6, p. 12-pg., 2022-11-01.

Abstract

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)

• FAPESP's process: 18/12076-5 - STUDY OF ACUSTIC ABSORPTION OF CONCRETE BARRIERS WITH THE ADDITION OF RUBBER AND VERMICULITE RESIDUES
• Grantee: Rosa Cristina Cecche Lintz
• Support Opportunities: Regular Research Grants
• FAPESP's process: 18/15894-0 - Periodic structure design and optimization for enhanced vibroacoustic performance: ENVIBRO
• Grantee: Carlos de Marqui Junior
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 18/14945-0 - SELF-COMPACTING LIGHT CONCRETE WITH EXPANDED CLAY AND EXPANDED POLYSTYRENE
• Grantee: Luísa Andréia Gachet
• Support Opportunities: Regular Research Grants