STUDY OF XONOTLITE - BASED AUTOCLAVED LIGHTWEIGHT AERATED CONCRETE WITH CEMENTITIOUS MATERIALS

Autoclaved lightweight aerated concrete (ALC) is a building material with tobermorite as the major constituent mineral, and made by Portland cement, silica and lime. On account of the most striking characteristics of thermal insulation properties and fire resistance, ALC is widely used as walls, floors and roofs. Tobermorite and xonotlite are well known as typical calcium silicate hydrates, in particular, xonotlite has long been used as a heat insulating material for high temperatures. However, it was difficult to synthesize xonotlite using cement because aluminum ions were the factor of inhibiting xonotlite formation and its crystal growth.