New Life of the Building Materials-Recycle, Reuse and Recovery

W. Y. Ng, Chi Kwan Chau

Research output: Journal article publicationConference articleAcademic researchpeer-review

21 Citations (Scopus)

Abstract

Published by Elsevier Ltd. Bulk of construction wastes generated through the dismantling process in a building redevelopment project creates many environment problems. Greater efforts are needed to put on the End-Of-Life (EOL) of building materials. Recycling, reusing and recovering of demolished wastes can either help relieve the landfill capacity or 'regain' some energy from existing building materials in order to reduce the embodied energy use for in the next new built building. This paper proposes to use 'energy saving potential' to quantify the amount of energy at the EOL phase that can be made usable in the building new life. Life cycle energy assessment was performed for the end-of-life phase of a high rise concrete commercial building. The energy associated with different waste management strategies was calculated to identify the options that can produce the highest energy saving in embodied energy. Recycling was found to have the highest energy saving potential of 53% while the energy saving potential of reusing was 6.2% and that of incineration was only 0.4%. Recycling strategy should be implemented for the building elements containing large amount of concrete (e.g. upper floor construction). Reusing instead of recycling should be adopted for the building parts with high aluminium content (e.g. windows).
Original languageEnglish
Pages (from-to)2884-2891
Number of pages8
JournalEnergy Procedia
Volume75
DOIs
Publication statusPublished - 1 Jan 2015
Event7th International Conference on Applied Energy, ICAE 2015 - Abu Dhabi, United Arab Emirates
Duration: 28 Mar 201531 Mar 2015

Keywords

  • Embodied energy
  • End-of-life
  • high-rise commerical buildings
  • LCA

ASJC Scopus subject areas

  • Energy(all)

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