Assessment of the Properties of Bricks Made from Stone Dust and Molten Plastic for Building and Pedestrian Pavement

The importance of bricks and the need to conserve the environment have led to the use of different types of waste material to replace either cement, clay or sand in the production of bricks. This study has looked into the use of molten plastic to replace cement in sandcrete bricks. Molten plastic was mixed with stone dust at ratio 1:1, 1:2, 1:3 and 1:4 by weight. Each sample was designated as P 1 , P 2 , P 3 and P 4 respectively. The brick samples were subjected to mechanical and water absorption tests. An investigation was conducted on the brick microstructures. Results showed that sample P 1 is good for building, facial bricks, pedestrian and light traffic pavement under moderate weathering conditions according to ASTM C67, while sample P 2 is okay for building bricks only under non-severe weathering condition. The remaining two brick samples did not perform well under any conditions. The microstructural analysis revealed the effects of micro-void sizes on the properties of the bricks.