High-strength coal gangue sintered porous brick and preparation method thereof

Abstract

The invention discloses a high-strength coal gangue sintered porous brick. The high-strength coal gangue sintered porous brick is prepared from the following raw materials (by weight): 30-50 parts ofcoal gangue particles, 20-30 parts of river bottom silt, 10-20 parts of quartz sand, 10-20 parts of waste ceramic particles, 3-8 parts of glass powder, 5-10 parts of bentonite, 8-15 parts of mixed auxiliaries, 3-6 parts of asbestos fibers and 2-5 parts of sulfate. The mixed auxiliaries comprise the following components in percentage by mass: 5-15% of a flame retardant, 20-30% of an anti-freezing agent, 50-70% of a reinforcing agent and 3-5% of a binder. The preparation method comprises the following steps of: (1) pretreating raw materials; (2) weighing the raw materials; (3) conducting primarymixing; (4) aging; (5) secondary mixing; (6) preparing a blank; (7) drying; (8) sintering; and (9) conducting steam curing. The preparation process is scientific and reasonable, the adopted raw materials are easy to obtain, the production cost is controllable, and the raw material components are reasonably matched, so that the prepared porous brick is easy to form, has few cracks, good compactness and good strength, and has a heat preservation effect.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-strength coal gangue sintered porous brick and a preparation method thereof. Background technique [0002] Porous brick refers to a porous brick made of clay, shale and fly ash as the main raw materials after molding and roasting. The porosity is equal to or greater than 15%. The hole type is round or non-round. The size of the hole is small and A large number are called porous bricks, which are mainly suitable for load-bearing walls. Compared with traditional solid bricks, porous bricks and hollow bricks can reduce the weight of buildings by about 1 / 3, save fuel by 10-20%, have a high firing rate, save costs, improve use efficiency, and can improve thermal insulation and sound insulation. New and more energy-efficient, has good economic significance, but the existing porous bricks mostly use clay, shale, etc. as the main raw materials, which greatl...

AI Technical Summary

Problems solved by technology

At present, due to the raw material composition and manufacturing process, porous bricks generally have defects such as rough production process, low brick strength, easy cracking, short service life, and higher price than ordinary bricks.