RECYCLING OF AAC WASTE IN THE MANUFACTURE OF AUTOCLAVED AERATED CONCRETE IN VIETNAM

The use of recycled materials helps investors to save significantly on production costs, not only from raw material extraction cost but also in the process. Especially, recycling waste reducing energy, fuel, and labor costs. Besides, transportation is less expensive than materials. workload involved minimal with economic technical efficiency. Autoclaved aerated concrete (ACC - concrete) has been widely applied construction works Vietnam considered a reasonable replacement fired bricks due lower volume density, better soundproofing insulation. main used make AAC include ground quartz sand, cement, lime, gypsum, aluminum powder, some other technological additives. However, depletion natural partial or complete sand plays an important signification. In this study, after autoclaving process was reused replace sand. research results show that could be content up 25% fabrication. properties products such as compressive strength, bulk drying shrinkage meet requirements ASTM C1693.