Cemental composites with polyurethane and recycled polyvinyl chloride: The influence of industrial waste addition on flammability

Abstract

In the construction industry, the large number of residues presents a challenge for recycling and the possibility of producing new materials. This study reported the effects of the addition of polyvinyl chloride (PVC) residues and cement/alumina trihydrate on the production of a fire-resistant thermalacoustic insulation material. The composites were verified by scanning electron microscopy, the polyurethane (PU) cells were maintained with the addition of PVC, cement, and trihydrate alumina. The reduction in compressive strength for boards with 50% PVC waste as a replacement for the PU raw material. The boards showed the composites' conductivity coefficient was lower than that of the perforated brick and combustion deceleration up to flame extinction in the flammability test (UL94) because of the PVC/cement/ alumina trihydrate. They also presented cost savings (~57%) and carbon dioxide emissions (~49%) from the raw material, contributing to developing a less predatory and socio-environmentally responsible industry.

Recent advances in polyvinyl chloride (PVC) recycling

“…40 Utilizing recycled PVC helps meet resource efficiency objectives and preserves raw materials. 41 By recycling PVC instead of relying solely on virgin materials, valuable resources can be conserved, contributing to a more sustainable approach to resource management. 42 Furthermore, the use of recycled PVC reduces emissions 43 and minimizes the need for landfills.…”

“…The benefits of recycling PVC extend beyond waste reduction 40 . Utilizing recycled PVC helps meet resource efficiency objectives and preserves raw materials 41 . By recycling PVC instead of relying solely on virgin materials, valuable resources can be conserved, contributing to a more sustainable approach to resource management 42 .…”