Transforming wood waste into water-resistant magnesia-phosphate cement particleboard modified by alumina and red mud

Lei Wang, Iris K.M. Yu, Chiu Wa Tsang, Shuang Li, Jiang shan Li, Chi Sun Poon, Yan Shuai Wang, Jianguo Dai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

49 Citations (Scopus)

Abstract

This study proposed a novel use of alumina and red mud to improve water resistance of MPC particleboards. Cement hydration chemistry and microstructure characteristics were revealed by quantitative X-ray diffraction analyses and scanning electron microscopy. Addition of alumina or red mud (Mg/Al or Mg/Fe at optimal molar ratio of 10:1) facilitated formation of amorphous Mg–Al or Mg–Al–Fe phosphate gel, respectively, which enhanced compressive strength. Alumina improved short-term water resistance, whereas red mud provided better long-term water resistance. Red mud-MPC binder enhanced strength retention (by 22.8%) and reduced water absorption (by 26.4%) of particleboards after 72-h water immersion, probably attributed to stable scaly-like Mg–Al–Fe phosphate gel. This study demonstrated that red mud and wood waste are sustainable materials for producing particleboards.
Original languageEnglish
Pages (from-to)452-462
Number of pages11
JournalJournal of Cleaner Production
Volume168
DOIs
Publication statusPublished - 1 Dec 2017

Keywords

  • Cement-bonded particleboard
  • Hydration chemistry
  • Magnesia-phosphate cement
  • Red mud
  • Waste recycling
  • Wood waste

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Strategy and Management
  • Industrial and Manufacturing Engineering

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