Shale sintering foam building block and preparation method thereof

Abstract

The invention discloses a shale sintering foam building block, which is dosed by the following materials by weight: 70 to 80 parts of shale, 20 to 30 parts of rubbish material, 10 to 15 parts of water and 1 part to 1.5 parts of additive. The building block is formed by conducting mixed material, foaming, mold natural molding, cutting and sintering on the raw materials. The specific preparation method includes respectively grinding the raw materials into powder of 80-100 powder, adding water into the raw materials to prepare slurry in stirring mode according to the prescription and the raw materials, adding calcium aluminate powder and sodium hydroxide into the slurry, stirring the mixture for 3 to 5 minutes, heating the mixture, adding hydrogen peroxide into the mixture, quickly stirring the mixture for 1 to 2 minutes, injecting evenly mixed materials into a mold, conducting natural foaming molding for 1 to 2 hours, conducting cutting molding through a cutting machine, finally conducting sintering under the temperature of 1000 DEG C to 1050 DEG C for 40 to 60 minutes and conducting cooling to obtain the building block. The building block avoids utilizing clay as a raw material, is capable of saving a large amount of land resources and has the advantages of being low in density, good in heat preservation performance, good in size stability, good in durability and the like. The method is simple in process, short in molding time and greatly reduces preparation cost.

Description

technical field [0001] The invention relates to a shale sintered foam block and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] In the prior art, there are various types of foamed concrete blocks for construction, and the preparation methods are different. However, most materials are single, and there are problems of high cost, insufficient strength or high thermal conductivity, and the preparation method is complicated in process and requires more equipment. For example, CN101885619A discloses "a kind of aerated sintered shale block and its preparation method". The aerated sintered shale block uses ordinary shale, cellulose ether and foam concrete foaming agent as raw materials. Stir with the prepared cellulose ether solution evenly to make shale slurry. The foaming agent is foamed under high-speed stirring conditions or in a foaming machine. Put the foam and shale slurry in the mixer for secondary stirri...

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Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problems of single material, high cost, insufficient strength, and unsatisfactory thermal conductivity in the prior art, and to provide a waste material with a wide range of materials, high waste utilization value, and low cost. , high strength, low thermal conductivity shale sintered foam blocks

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