A. Dawson, University of Nottingham, UK
Waste and by-product materials have great potential for use as additives to conventional materials that are used to make modern earth buildings, or even as a partial or total replacement for natural soils. The chapter gives an overview of potential materials, their variety, potential, benefits, disadvantages and characteristics. Special attention is paid to the issues of leaching, age-dependent strength and the use of fine-grained by-products as pozzolanic or self-cementing binders in place of conventional cement. An introduction to long-term evaluation and ultimate recycling of these materials is also provided.