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Home  > Raw materials & technologies  > Technologies  > Can PVC waste be used for asphalting roads?

Saturday, 20 July 2019
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Raw materials & technologies, Technologies

Can PVC waste be used for asphalting roads?

Friday, 14 March 2014

In a study PVC pipe waste has been used as a modifier in making bituminous products for paving application.

Recycling of PVC in future as street basement? Source: Kadmy/Fotolia

Recycling of PVC in future as street basement? Source: Kadmy/Fotolia

Polyvinylchloride (PVC) is the most problematic plastic produced today. For years throw-away products made of PVC have been a leading cause of dioxin pollution in incinerators and when burned in fires.

PVC is not compatible with bitumen

Indian researchers used PVC pipe waste as a modifier up to a level of 3% and 5% of bitumen. PVC releases dioxins when burned; so it cannot be directly heated with aggregate at high temperature. The waste can only be used safely when it makes a homogenous blend with bitumen at a temperatur of 160°C. To make a homogeneous blend, waste PVC was initially treated with a chemical modifier and then blended with bitumen. The visco-elastic properties of the bitumen-PVC blend were studied. Later the performance characteristics of bituminous mix made up of these modified binders were compared with those of conventional bituminous mix.

Waste enhances bituminous properties

The results indicate that PVC pipe waste can be used successfully in road construction. Strength and stability of the mix increased after incorporation of PVC pipe waste, and also increased resistance to permanent deformation was observed.

The study is published in: Construction and Building Materials, Volume 54, 15 March 2014, Pages 113-117

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