Influence of proportion and particle size gradation of rubber from end-of-life tires on mechanical, thermal and acoustic properties of plaster–rubber mortars

Abstract

abstra ctThis work presents the main experimental results obtained from the study of plaster test pieces and boards with addition of various volumetric rubber fractions from mechanical grinding of end-of-life tires (ELTs), in three different particle size gradations. It includes a description of the materials employed, and their proportions. The physical and mechanical properties, as well as the thermal conductivity and acous-tic insulation properties are analyzed. Experimental results obtained for specimens with addition of recy-cled rubber are compared with similar ones, carried out on specimens of plaster of identical features without any addition, evaluating the influence of the particle size and mixture proportions. An improve-ment in thermal and acoustic performance has been obtained as well as a reduction in density, and as a result, some constructive applications for paving and slabs in rehabilitation works are proposed.

Utilization of waste rubber in non-structural applications

“…Herrero [30] stated that rubber has good properties to dissipate dynamic energy which improve the sound insulation performance of the composite.…”

“…Furthermore, different types of rubber particles were used in the present study like crumb and fibrous rubber. Also, some of the previous studies [2,4,14,16,21,22,24,27,30,31] recommended that the thermal and sound insulation properties of rubberized concrete are considered a research need. In addition, new composites (products) were suggested in the research work.…”

Characterization of gypsum plasterboard with polyurethane foam waste reinforced with polypropylene fibers

“…This waste product is a by-product of packaging collected from municipal recycling schemes that is subsquently milled. Other studies have been conducted on construction panels prepared with a mixture of gypsum rubber from end-of-life tires (12) and gypsum cork waste (13), both of which are characterized by their low density, as well as on the addition of recycled paper to plasterboard (14). Polyurethane foam waste has been studied in lightweight plaster materials with enhanced thermal properties in (15), although no references have been found on the use of this type of waste in the preparation of gypsum plasterboard.…”

Lightweight Gypsum Based Materials: Methods of Preparation and Utilization

“…Also the workability of the material was worse, and it was difficult to achieve a homogeneous distribution of rubber particles in the gypsum plaster [11]. Herrero et al [12] tested the rubber particles with different granulometry and best results were achieved with the finest particles (size 0-0.6 mm). Although the mechanical properties worsened, the thermal and acoustic properties were improved, namely the insulation capacity against both impact and airborne noise.…”