Lime and Other Alternative Cements

A cement material, or binder, is an essential ingredient in most forms of building construction. Portland cement has become a widely accepted cementitious material, but it is more expensive than other binders and unsuited to small-scale production. In addition, although it is stronger than most alternatives, there are uses for which alternatives such as lime are more suited. Lime is versatile, durable and suitable for use in complex and intricate decorative and restoration work, as well as in simple buildings. If greater strength is required, a variety of materials known as pozzolanas can be added to the lime. Examples of pozzolanas include rice husk ash, brick dust and certain types of naturally occurring volcanic ash. The most successful material in any area depends on local primary resources and the development of appropriate technology. Lime gypsum and lime pozzolanas could be reintroduced successfully if more information were available and appropriate building standards enforced. This book brings together expert knowledge from around the world about the use of different alternative binders, presenting case histories which demonstrate the successes and the pitfalls, as well as practical information based on experience. A recurring theme in the book is the need to work towards the wider acceptance of lime, and alternative binders by: establishing realistic performance standards for alternative cements and getting these standards accepted in international, national and local building codes and standards. Establishing simple testing procedures to measure compliance with these performance standards; holding seminars and training courses and compiling case study material on existing production and use; and, initiating research and development projects of a practical nature.