The annual production of construction demolition (C&D) waste in the UK amounts to 109 million tonnes. This accounts for over 60% of the UK's total waste. Rather than send C&D waste to landfill, increased environmental awareness has led to pressure to use these materials as a resource. There are two ways in which C&D waste can be developed for use in concrete; (i) as recycled aggregates (a commonly perceived approach) or (ii) as a cement component (a novel approach). This paper reports on recent research undertaken by the Concrete Technology Unit (CTU) at the University of Dundee to promote these methods for using C&D waste. Research, carried out since 1996, to show the suitability of coarse recycled aggregates in concrete is described, including a full-scale demonstration that used recycled concrete aggregate as the sole coarse aggregate in a concrete pavement designed for a XF4 exposure class. In addition, the paper reports on research to render C&D waste suitable for use as a cement constituent. The processing options examined are ultrafine grinding and thermal processing. Preliminary results of an ongoing study are presented, along with a discussion of their significance and of the environmental impact implications.
|Title of host publication||Sustainable waste management and recycling : construction demolition waste|
|Subtitle of host publication||proceedings of the international conference organised by the Concrete and Masonry Research Group and held at Kingston University - London on 14-15 September 2004|
|Editors||Mukesh C. Limbachiya, John J. Roberts|
|Place of Publication||London|
|Number of pages||10|
|Publication status||Published - 2004|
|Event||International Conference organized by the Concrete and Masonry Research Group - Kingston University, London, United Kingdom|
Duration: 14 Sep 2004 → 15 Sep 2004
|Conference||International Conference organized by the Concrete and Masonry Research Group|
|City||Kingston University, London|
|Period||14/09/04 → 15/09/04|
Dhir, R. K., Paine, K. A., & Dyer, T. D. (2004). Recycling and reconstitution of construction and demolition waste. In M. C. Limbachiya, & J. J. Roberts (Eds.), Sustainable waste management and recycling : construction demolition waste: proceedings of the international conference organised by the Concrete and Masonry Research Group and held at Kingston University - London on 14-15 September 2004 (pp. 123-132). Thomas Telford.