Expanded Vermiculite: A Short Review about Its Production, Characteristics, and Effects on the Properties of Lightweight Mortars

Global temperatures have led to an increasing need for air conditioning systems. So, because of this fact, buildings been improved in terms their thermal and energy efficiency. Regarding this, the Brazilian standard ABNT NBR 15.575-4/2013 set minimum parameters transmittance capacity sealing elements, which allow classifying efficiency building. In order comply with requirements, usage study lightweight construction materials focus. An example these is vermiculite. The present research reviewed articles about expanded involved examination comparison various analyze properties vermiculite impact its on coating mortars. It was possible verify that using mortars caused bad workability a decrease mechanical strength. However, porosity water absorption increased. Additionally, it reduced specific weight conductivity mortars, allowing better insulation rooms. As alternative decreasing negative effects vermiculite, use chemical admixtures, mineral additions, mix design greater consumption binder or combination particle sizes.