Manufacturing method of light-weight building block for internal, external wall

Abstract

A light-weight building block for internal and external walls is proportionally prepared from cement, sand, magnesium oxide, porcelain stone, gypsum, expanded pearlite, filler and powdered coal ash through mixing them with water, stirring while adding the solution of aluminium potassium sulfate, the solution of sodium silicate and water-reducing agent, die pressing, and natural curing for 10-12 days.

Description

technical field [0001] The invention relates to a manufacturing method of lightweight inner and outer wall blocks, and belongs to the technical field of building material processing. Background technique [0002] In view of the fact that the main wall materials in the building materials market are still mainly clay bricks produced by destroying resources, destroying good land, and polluting the environment, the state has explicitly restricted the use of such wall materials. Using industrial waste such as fly ash produced by thermal power plants to make wall blocks to replace traditional clay bricks has the advantages of protecting fertile land and saving resources, but the physical and chemical properties of this block are poor, aging quickly, and are affected by the climate environment. And other constraints of some external factors. [0003] The disadvantages of the high-powdered coal-incorporated foam block technology disclosed in CN1148578A are that, in addition to the ...

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Problems solved by technology

[0002] In view of the fact that the main wall materials in the building materials market are still mainly clay bricks produced by destroying resources, destroying good land, and polluting the environment, the state has explicitly restricted the use of this wall material

Using industrial waste such as fly ash produced by thermal power plants to make wall blocks to replace traditional clay bricks has the advantages of protecting fertile land and saving resources, but the physical and chemical properties of this block are poor, aging quickly, and are affected by the climate environment. and other external factors

[0003] The disadvantages of the high-powdered coal-incorporated foam block technology disclosed in CN1148578A are that, in addition to the cumbersome manufacturing process, strict maintenance requirements, and high manufacturing cost, because of the low strength of the product, it can only be suitable for some heat insulation and non-load-bearing structural occasions

[0004] CN1087071A needs a large amount of volcanic ash, and the source of raw materials is difficult, especially, magnesium chloride aqueous solution, glass fiber and additives such as aluminum powder or hydrogen peroxide or triethanolamine, sodium chloride, sodium hydroxide, etc. are used, resulting in unstable chemical properties of the product, such as Magnesium chloride, etc. will easily cause the loss of moisture-proof performance of the block, and moisture condensation will appear; the acquisition of raw materials is difficult and costly

[0005] CN1092750A uses waste paper pulp as a filler, and the strength of the product cannot be guaranteed

In the technical scheme disclosed in CN1096500A, the provided hollow block adopts a large amount of fly ash and furnace bottom slag to cause heavy product weight, which brings difficulty to the construction operation; the recommended raw materials for processing the hollow block according to the scheme are subject to different climate temperatures and Specific occasion restrictions, that is, different climates should have different requirements for raw materials

However, because the hollow block obtained by this patented technical solution belongs to the category of slag cement block, it ignores the necessary properties such as low water absorption, low thermal conductivity, excellent corrosion resistance, and no moisture return as internal and external wall blocks. , small drying shrinkage coefficient, no frosting, etc., and its claimed strength is 2.2-3.96Mpa and bulk density is 628-817kg / m 3 still unsatisfactory

[0013] As far as CN1060459A is concerned, fly ash, perlite lightweight hollow blocks are compounded into fly ash, expanded perlite and cement, except that there are similar advantages and disadvantages with CN1044640A, because the aqueous solution contains a ratio of 1.5% early strength agent, it can only improve the temporary early strength of the product, but cannot guarantee the long-term strength of the product

For example, its compressive strength, flexural strength, strength after carbonization, and compressive strength after freezing are only 1.95Mpa, 0.57Mpa, 1.93Mpa, and 1.73Mpa respectively. There are concerns about the application of these strength indicators, and they are not suitable as load-bearing wall blocks. Use, and the drying shrinkage value of 0.61mm / m is also a taboo for building materials

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