Title:
Acoustic and Thermal Analyses of Self-Consolidating Lightweight Rubberized Concretes
Author(s):
A. F. Angelin, E. J. P. de Miranda Junior, J. M. C. dos Santos, W. R. Osório, R. C. Cecche Lintz, and L. A. Gachet
Publication:
Materials Journal
Volume:
119
Issue:
6
Appears on pages(s):
53-64
Keywords:
acoustic attenuation; lightweight concrete; mechanical resistances; self-consolidating concrete (SCC); thermal conductivity; waste tire rubber
DOI:
10.14359/51736005
Date:
11/1/2022
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 associated 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.