The invention discloses a red-mud-fly-ash high-strength heat-preservation building block based on alkali excitation.
Industrial waste fly ash and
red mud serve as main raw materials,
cement and quicklime serve as auxiliary materials, and fly-ash pottery sand or shale pottery sand serve as heat-preservation materials. The building block is prepared from, by
mass, 18-40% of
red mud, 18-30% of
fly ash, 25-40% of pottery sand, 3-8% of
cement, 3-10% of
lime, 1-3% of
straw fibers and 0.5-2% of early strength agents, the
water content is 10-15%, aging is conducted for 8-36 hours, and molding is conducted under the pressure of 40 MPa; the building block is prepared by the steps of
drying,
grinding, weighing, mixing of the auxiliary materials,
compression molding, standard maintenance and natural curing. The red-mud-fly-ash high-strength heat-preservation building block based on the alkali excitation has the advantages of being simple in molding process, capable of having a reaction and being cured quickly at
room temperature, and free from
sintering and
stream-pressure, products of the building block are high in
compressive strength and anti-dry-shrinkage performance and good in impermeability, and can be stored for a long time without scumming phenomena. A large amount of
industrial waste can be utilized, the energy and resources are saved, and the cost and
energy consumption are low.