Sand reinforced polyester composite

Sand composites, most commonly sand reinforced polyester composites (SPCs), involve a building material with sand acting as reinforcement in the composite. Pioneers in using sand reinforced composites include German business men Gerhard Dust and Gunther Plötner, who made sand reinforced composite bricks with polyester resin and hardener to provide emergency relief housing for those affected by the 2010 earthquake in Haiti. Sand was used in the composites because of its abundance and ease in obtaining.
Composition.
The composition of sand is highly variable depending on the origin of the sand. The most common material found in non-tropical, coastal, and inland sand is silica usually in the form of quartz – which is considerably hard and one of the most common minerals resistant to weathering.