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The use of recycled aggregate in concrete in Hong Kong

Author

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  • Poon, Chi-Sun
  • Chan, Dixon

Abstract

In 2004, over 20 million tonnes of construction and demolition (C&D) wastes were generated in Hong Kong. Since the local landfills will be saturated in about 8 years, it is important to find a viable way to reuse these waste materials as to alleviate the demand on public fill capacity. In order to tackle the problem, the Hong Kong government has set up a temporary recycling facility in Hong Kong in 2002 for producing different sizes of recycled aggregate for use in various construction materials. This paper summarizes the details of the construction of the Hong Kong Wetland Park which consumed approximately 14,300m3 of concrete prepared with recycled aggregate. However, as of today, the recycled aggregate being reused is stringently restricted to recycled concrete aggregate (RCA). The use of other wastes such as brick and ceramic tile aggregate is prohibited momentarily even the combination of bricks and ceramic tiles constitutes a large portion of the C&D wastes. In order to facilitate the wider use of the inert portion of the C&D wastes, a preliminary study was conducted to investigate the possibility of using crushed brick and tile aggregate derived from construction and demolition waste stream as a replacement of fine aggregate in concrete. The effects of the use of fine crushed brick and tile aggregate as a 20wt.% replacement of natural sand on the fresh and mechanical properties are presented.

Suggested Citation

  • Poon, Chi-Sun & Chan, Dixon, 2007. "The use of recycled aggregate in concrete in Hong Kong," Resources, Conservation & Recycling, Elsevier, vol. 50(3), pages 293-305.
    • Handle: RePEc:eee:recore:v:50:y:2007:i:3:p:293-305
    DOI: 10.1016/j.resconrec.2006.06.005
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    Cited by:

    1. Lu, Weisheng & Yuan, Hongping, 2010. "Exploring critical success factors for waste management in construction projects of China," Resources, Conservation & Recycling, Elsevier, vol. 55(2), pages 201-208.
    2. Gokhan Kaplan & Mesut Turkoglu & Burak Bodur & Oguzhan Yavuz Bayraktar, 2022. "Usage of recycled fine aggregates obtained from concretes with low w/c ratio in the production of masonry plaster and mortar," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 24(2), pages 2685-2714, February.
    3. Zhao, W. & Leeftink, R.B. & Rotter, V.S., 2010. "Evaluation of the economic feasibility for the recycling of construction and demolition waste in China—The case of Chongqing," Resources, Conservation & Recycling, Elsevier, vol. 54(6), pages 377-389.
    4. Jin, Ruoyu & Li, Bo & Zhou, Tongyu & Wanatowski, Dariusz & Piroozfar, Poorang, 2017. "An empirical study of perceptions towards construction and demolition waste recycling and reuse in China," Resources, Conservation & Recycling, Elsevier, vol. 126(C), pages 86-98.

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