Resistant Fire Clay Brick High temperature Refractory Fire Clay Brick also include rock processing bricks, which are artificial small blocks for construction. Clay bricks are made of materials (including page and coal gangue powder) as raw materials. After mud, molding, drying and roasting, there are solid and hollow distinctions.
Clay bricks are made of clay (including powders such as shale and coal gangue) as the main raw material, which is processed, shaped, dried and roasted by mud. During the Spring and Autumn Period and Warring States Period, China successively created square and rectangular bricks. During the Qin and Han Dynasties, the technology and production scale, quality and fancy varieties of bricks have developed significantly, and they are called "Qin Brick and Han Tiles". The size of ordinary bricks is 240mm×115mm×53mm. According to the compressive strength (Newton/square millimeter, N/mm2), it is divided into 6 strength levels: MU30, MU25, MU20, MU15, MU10, and MU7.5 . Clay bricks are made on-site, cheap, durable, and have the advantages of fire resistance, heat insulation, sound insulation, and moisture absorption. They are widely used in civil engineering. Waste broken bricks can also be used as aggregates for concrete. In order to improve the shortcomings of ordinary clay bricks that are small, self-heavy, and consume a lot of soil, it is developing in the direction of light weight, high strength, hollow, and large blocks. Lime-sand bricks are made of lime and quartz sand, sand or fine sandstone in an appropriate proportion, after being finely ground, mixed with water, semi-dry pressing, and being cured by autoclave. Fly ash bricks are made of fly ash as the main raw material, mixed with coal gangue powder or clay and other cementing materials, and are made by batching, forming, drying and roasting, which can make full use of industrial waste residues and save fuel.