Natural Clay Material for Terracotta Facade Cladding
Clay is the material first and most widely used for producing potteries/ceramics, ranging from ancient ceramic utensils, bricks of Great Wall of China,
Terracotta Warriors and Horses to modern ceramics (artistic ceramics, domestic ceramics and Architectural Terracotta) that people frequently utilze nowadays.
Terracotta facade cladding – one of the most eco-friendly building materials nowadays – is made of natural clay by using wet extrusion and high-temperature calcination processes.
But not every kind of clay is suitable for producing Terracotta Facade. Clay is composed of clay minerals (such as iron oxide, feldspar, calcium, carbonate, magnesium carbonatel silicon dioxide and alkali-matal compounds) as well as soluble salts and organics,
the latter of which severely affect the quality of terracotta panels. The type and usability of clay are greatly dependent on its geological location. Different kinds of clay are different in chemical composition, mineral composition, particle size and plasticity.
Those differences have a direct impact on the drying and calcination conditions. Today, the bet clay in China is distributed in Jiangsu, Fujian and Guangdong provinces, etc.