Abstract
Abstract Laterite waste powder has been consolidated into building bricks using phosphoric acid as bonding agent. The bricks could be cured at low temperatures (450–500°C). Properties have been achieved comparable with those of burnt clay bricks. For example, 2·5% binder-added brick has shown superior properties such as compressive strenght of about 10 MPa, water absorption of 10% and bulk density of 1·5 g/cm 3 . The bonding between the laterite grains is quite strong and the brick has attained improved wear properties. These bricks showed typical microstructures (studies by SEM method) consisting of well-bonded compacted laterite particles, the determining factor towards superior properties of the finished products.
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