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Physico-mechanical and thermal properties of composite mortars containing lightweight aggregates of expanded polyvinyl chloride

2018; Elsevier BV; Volume: 175; Linguagem: Inglês

10.1016/j.conbuildmat.2018.04.173

1879-0526

Noureddine Latroch, Ahmed Soufiane Benosman, Nasr-Eddine Bouhamou, Y. Senhadji, M. Mouli,

Innovations in Concrete and Construction Materials

Expanded polyvinyl chloride (PVC) or “FOREX” is widely used in advertising and signage boards, shop fittings and shop window decorations. This article attempts to study the physico-mechanical and thermal properties of lightweight composite mortars based on expanded polyvinyl chloride (LMEPVC), in which the natural sand are replaced by lightweight aggregates from expanded PVC sheets, with different volume proportions (0, 15, 25, 50 and 75%v). The consistency, density, porosity accessible to water, mechanical strengths (compressive and flexural tests), ultrasonic pulse velocity (UPV), dynamic modulus of elasticity (Ed), and thermal conductivity are measured on various LMEPVC samples. Scanning electron microscopy (SEM) for microstructural analysis is performed to elucidate the mechanism of strength development. The results obtained showed that reduce the specific weight of the LMEPVC composites and improve their thermal insulation, particularly the composite LMEPVC75 (λ = 0.760 W/m.K). On the other hand, the dynamic modulus of elasticity (Ed) of that same composite was found to decrease by about 66% as compared to that of the reference mortar.