Production method for iron tailing sand aerated concrete building block

Abstract

The invention discloses a production method for an aerated concrete building block, in particular to a production method for an iron tailing sand aerated concrete building block. The production method for an iron tailing sand aerated concrete building block comprises the following steps of: preparing iron tailing mortar material, wherein the concentration of added desulfurized gypsum is 50-60%; preparing aluminum powder solution of which the concentration is 20-25%; burdening at the following mass ratio: 81.54% of iron tailing mortar, 10.58% of lime powder, 5.88% of cement, 1% of Chinese honey locust powder and 1% of aluminum powder solution; and pouring, procuring, demoulding, cutting for shaping, and steaming for curing. The production method for the iron tailing sand aerated concrete building block has the outstanding characteristics that the abandoned iron tailing sand serves as main raw material for production, and the production method has the advantages of wide raw material resource, high waste use ratio and low production cost and is easy to popularize and apply. Because the product weight is low, the iron tailing sand aerated concrete building block is suitable for the filling wall of a high-rise building and the load bearing wall of a low-rise building; because the iron tailing sand aerated concrete building block has good thermal-insulation performance, the thickness of the wall body can be reduced; because the iron tailing sand aerated concrete building block has good water vapor permeability, moisture on the wall body is easy to discharge; and the iron tailing sand aerated concrete building block has high strength which is equivalent to the compressive strength of No.125 clay bricks and limesand bricks.

Description

[0001] Technical field: [0002] The invention relates to a production method of an aerated concrete block, in particular to a production method of an iron tailing sand aerated concrete block. Background technique: [0003] Aerated concrete block is a new type of wall material that is energy-saving, soil-saving, and waste-effective. At present, it is mostly produced with fly ash as the main raw material. The existing problems of fly ash aerated concrete blocks are: low strength, large drying shrinkage value, weak bond with mortar, easy to make the wall plaster layer hollow, cracking, etc., especially currently fly ash is used in other industries It also has its specific use and has a certain market price compared with other wastes. Chinese patent CN1275897C discloses a gold tailings autoclaved aerated concrete block and its production method. Although the compressive strength given in the specification is greater than or equal to 3.5MPa, which is better than the fly ash aer...

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Problems solved by technology

The existing problems of fly ash aerated concrete blocks are: low strength, large drying shrinkage value, weak bond with mortar, easy to make the wall plaster layer hollow, cracking, etc., especially currently fly ash is used in other industries It also has its specific use and has a certain market price compared with other wastes.

Chinese patent CN1275897C discloses a gold tailings autoclaved aerated concrete block and its production method. Although the compressive strength given in the specification is greater than or equal to 3.5MPa, which is better than the fly ash aerated concrete block, it is used as waste The amount of gold tailings added is relatively low. On the contrary, the useful raw materials cement and quicklime account for a large proportion in the raw material formula, and the waste utilization rate is not optimal.

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