A life cycle assessment of recycled polypropylene fibre in concrete footpaths

Yin, Shi, Tuladhar, Rabin, Sheehan, Madoc, Combe, Mark, and Collister, Tony (2016) A life cycle assessment of recycled polypropylene fibre in concrete footpaths. Journal of Cleaner Production, 112 (Part 4). pp. 2231-2242.

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Abstract

This study assesses the environmental impact of four alternatives for reinforcing 100 m² of concrete footpath (Functional Unit, FU) by using cradle to gate life cycle assessment (LCA), based on the Australian context. Specifically, the four options considered are a) producing steel reinforcing mesh (SRM), b)producing virgin polypropylene (PP) fibre, c) recycling industrial PP waste and d) recycling domestic PP waste. The FU yields 364 kg of SRM (in a) and 40 kg of PP fibres (in b, c and d), necessary to achieve the same degree of reinforcing in concrete. All the activities required to produce these materials are considered in the study, namely manufacturing and transportation, and also recycling and reprocessing in the case of industrial and domestic recycled PP waste fibres. These processes are individually analysed and quantified in terms of material consumption, water use, and emissions into the environment. This allows for the impacts from producing recycled fibres to be compared with those from producing virgin PP fibre and SRM, which are traditionally used. The LCA results show that industrial recycled PP fibre offers important environmental benefits over virgin PP fibre. Specifically, the industrial recycled PP fibrecan save 50% of CO₂ equivalent, 65% of PO₄ equivalent, 29% of water and 78% of oil equivalent, compared to the virgin PP fibre. When compared to the SRM, the industrial recycled PP fibre can save 93% of CO₂ equivalent, 97% of PO₄ equivalent, 99% of water and 91% of oil equivalent. The domestic recycled PP fibre also generates reduced environmental impacts compared to virgin PP fibre, except for higher consumption of water associated with the washing processes.

Item ID: 41534
Item Type: Article (Research - C1)
ISSN: 0959-6526
Keywords: life cycle assessment, recycled polypropylene fibre, plastic fibre, concrete, footpath, plastic waste, recycling
Date Deposited: 12 Jul 2016 04:16
FoR Codes: 09 ENGINEERING > 0907 Environmental Engineering > 090703 Environmental Technologies @ 40%
09 ENGINEERING > 0912 Materials Engineering > 091209 Polymers and Plastics @ 20%
09 ENGINEERING > 0905 Civil Engineering > 090503 Construction Materials @ 40%
SEO Codes: 87 CONSTRUCTION > 8703 Construction Materials Performance and Processes > 870301 Cement and Concrete Materials @ 50%
87 CONSTRUCTION > 8703 Construction Materials Performance and Processes > 870303 Polymeric Materials (e.g. Paints) @ 50%
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