1. Recycled aggregate and recycled aggregate for concrete, Recycled of demolished concrete and masonry;Hansen,1992
2. Reuse of demolition materials in relation to specifications in the UK, Demolition and reuse of concrete and masonry;Collins,1994
3. Specification for aggregates from natural sources for concrete;British Standards Institution, BS 882,1992
4. Specification for Portland cement;British Standards Institution, BS 12,1996
5. Part 1: Pulverized-fuel ash. Specification for pulverized-fuel ash for use with Portland cement;British Standards Institution, BS 3892,1997