Practical Action Publishing

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  Considerations, design calculations, construction, test and evaluation of a cavity walled solar oven

  Steen Carlsen

  This report investigates the feasibility of designing a dual (i.e. cavity) wall and doubled glazed solar oven, with the aim to raise the operating temperature to as near to 100oC as possible. The present design has aimed to comply with the living conditions in - and to use cheap materials and tools...

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  Assessing the Technical Problems of Brick Production

  A guide for brick makers and field workers to help identify technical problems.

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  Biogas

  Biogas is a fuel used for cooking and lighting, made from dung and other organic waste.

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  Building Small-Scale Water Harvesting Dams

  North Darfur faces acute deficit in its water. The need for water has forced farmers to try and adapt their practices and conserve more water.

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  Carrot Farming

  This technical brief describes how to optimise the farming of carrots with detail on the seasons, sowing, fertiliser and seeding rates.

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  Clay as a Binder

  Clays are the main binders of earth and are made up of very small mineral particles leached out during the erosion of rock.

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  Code of Practice for Cost Effective Boreholes

  Code of Practice for Cost Effective Boreholes Technical Brief

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  Lime Production

  There is a long history of production and use of lime in Sri Lanka. Its main use has been as a cementing agent and as a decorative whitewash in the building industry.

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  Hydraulic Lime: An Introduction

  Hydraulic lime was an important cementitious material before the arrival of Portland cement but it is little used now, except in conservation work.

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  The Kebkabiya Plough

  This plough has been used with great success in Kebkabiya, Sudan. Here is a highly visual guide to its use.