Thermal and acoustic properties of sustainable structural lightweight aggregate rubberized concrete

This study investigated the effect crumb rubber recycled from wasted tires on properties of structural lightweight aggregate concrete (LWAC). Two types were tested: control LWAC and rubberized (RLWAC). The consisted cement, fine (river sand), coarse (porous aggregates). For RLWAC, was replaced by at rate 10, 20, 30, 40, 50% volume. water to cement ratio for both set 0.35. experiment series density (ASTM C567), compressive strength C39), flexural C78), thermal conductivity C518), sound absorption coefficient (ISO 10534-2). Results showed decrease in about 10%, 21.4%, 35.4% with increasing replacement up 50%. properties, content improved insulation concrete, as seen 14.6%. RLWAC also exhibited superior insulating higher over working frequency range. In order satisfy requirements ASTM C330 ACI 318, optimum recommended less than 10%.