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Methods for reducing the cost of cementitious building components in developing countries, with particular reference to rainwater harvesting

By Gwilym T. Still

Abstract

Cementitious building components, although widely used in low-income countries, are too expensive for many applications related to low-income housing.\ud This thesis explores three options for reducing component cost:\ud 1. Use of local fine aggregates, often with clay contamination, instead of low-fines sands transported from a distance.\ud 2. Improved designs, to achieve better material economy.\ud 3. Change of production environment, from on-site to component prefabrication followed by transport to site.\ud Water storage tanks for rainwater harvesting were used as the example for component design, and as a case-study for considering the effect of changing the production environment. The work showed that: \ud In some cases, use of local aggregates will give a cost saving of around 10%. \ud Improved design can give significant reduction in materials usage, of up to 40%.\ud Off-site prefabrication of components, followed by on-site assembly to produce the desired product, does not seem preferable to the prevelant practice of entirely on-site production from raw materials. However, factory-based manufacture of complete products, followed by transport to site, has a number of attractions over entirely on-site production.\ud Out of the three options examined, improved component design offers the greatest benefits for the case study considered

Topics: TD, TA
OAI identifier: oai:wrap.warwick.ac.uk:2342

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