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A study is being undertaken at the University of Liverpool to investigate the potential for using construction and demolition waste (C&DW)-derived aggregate in the manufacture of precast concrete building blocks. Recycled aggregates can be used to replace quarried limestone aggregate, usually used in coarse (6 mm) and fine (4 mm-to-dust) gradings. Market research has been carried out to determine the economic viability of using C&DW-derived aggregates in blocks. The availability and transportation costs of quarried and C&DW-derived aggregates have been compared and there appears to be scope for investigating the technical as well as the economic aspects of the use of C&DW-derived aggregates in block manufacture.
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Soutsos et al. (2004) studied this question.
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