Zero waste initiative for plastics generated from a new build residential construction site

dc.contributor.affiliationUnitec, Te Pūkengaen_NZ
dc.contributor.affiliationTe Pūkengaen_NZ
dc.contributor.affiliationEnvironmental Solutions Research Centre (Unitec, Te Pūkenga)en_NZ
dc.contributor.affiliationJunk Run (N.Z.)en_NZ
dc.contributor.affiliationBenton Limited (Auckland, N.Z.)en_NZ
dc.contributor.authorLow, J.K.
dc.contributor.authorBoyes, R.
dc.contributor.authorBenton, N.
dc.contributor.authorHernandez, G. A.
dc.contributor.authorThomson, Penny
dc.contributor.authorWallis, Shannon
dc.contributor.authorBerry, Terri-Ann
dc.description.abstractIn Auckland, 50% of the total waste stream is derived from construction and demolition waste, estimated at 568,935 tonnes in 2019. In comparison to other countries, the plastic proportion of NZ construction and demolition (C&D) waste is relatively large at approximately 4%. This amounts to approximately 25,000 tonnes of plastic waste sent to Auckland’s landfills every year, despite its potential economic value. The concept of zero waste can be summarised as a goal that is ethical, economical, efficient and visionary, which guides people to lifestyle changes so that all discarded materials are designed to become resources for others to use. Zero waste is a target which looks beyond short-term improvements and focuses on radical and long-term change. One construction company trialed a zero-waste project for a new-build residential construction site, with an aim of 90% diversion of all construction waste from landfill. This case study provided a unique opportunity to investigate the sources of various plastics resulting from construction waste and how they can be diverted from landfill via reuse and recycling. The collaborative efforts of Benton Ltd, Junk Run, Auckland Council, Environmental Solutions Research Centre (ESRC), saveBOARD, Marley NZ, DIVERT NZ and Polymer Processing NZ Ltd enabled plastic construction waste to be diverted, reused and recycled into new products. All plastic waste was collected, audited and analysed using Fourier Transform Infrared spectroscopy (FTIR). Preliminary results show that the dominant plastic materials were polyethylene - PE (42.5% by mass), followed by expanded polystyrene - EPS (30.9%) and PVC pipes (13.2%). Of the waste audited so far, 60% of plastic waste has been recycled or reused, and diverted from landfill; however, it is estimated that 80% of plastic waste materials from this site can be easily recycled. Soft plastics (PE), EPS, polypropylene (PP) and PVC can be recycled into new components providing contamination is limited and/or removable. Preliminary findings have identified reuse and recycling options for various plastic materials, and the requirements of plastics for such recycling. This research discusses options, tactics and barriers for separating plastic waste on site and identifies materials which cannot easily be recycled.en_NZ
dc.identifier.bibliographicCitationLow, J.K., Boyes, R., Benton, N., Hernandez, G., Thomson, P., Wallis, S., & Berry, T-A. (2022, December, 8-9).Zero waste initiative for plastics generated from a new build residential construction site [Paper presentation]. Rangahau: Te Mana o te Mahi Kotahitanga: Research: The Power of Collaboration, MIT/Unitec Research Symposium 2022, Te Pūkenga, New Zealanden_NZ
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.subjectAuckland (N.Z.)en_NZ
dc.subjectNew Zealanden_NZ
dc.subjectplastic wasteen_NZ
dc.subjectconstruction waste managementen_NZ
dc.subjectdemolition wasteen_NZ
dc.subjectwaste managementen_NZ
dc.subject.marsden401106 Waste management, reduction, reuse and recyclingen_NZ
dc.titleZero waste initiative for plastics generated from a new build residential construction siteen_NZ
dc.typeConference Contribution - Oral Presentationen_NZ of Building Construction
unitec.conference.locationMount Albert, Auckland, New Zealanden_NZ
unitec.conference.orgManukau Institute of Technology, Te Pūkengaen_NZ
unitec.conference.orgUnitec, Te Pūkengaen_NZ
unitec.conference.orgTe Pūkenga (Technical institute)en_NZ
unitec.conference.titleMIT/Unitec Research Symposium 2022 - Rangahau: Te Mana o te Mahi Kotahitanga: Research: The Power of Collaborationen_NZ
unitec.institution.studyareaConstruction + Engineeringen_NZ
unitec.publication.titleMIT/Unitec Research Symposium 2022en_NZ
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