A kind of preparation method of basic magnesium sulfate cement foam concrete insulation material

Abstract

The invention discloses a preparation method of basic magnesium sulfate cement foam concrete insulation material, which is prepared from the following raw materials in parts by mass: 100 parts of active magnesium oxide, 30-100 parts of magnesium sulfate, and 0.01-1 part of manganese dioxide , 0.2 to 2 parts of potassium citrate, 1 to 5 parts of potassium dihydrogen phosphate, 1 to 8 parts of foam stabilizer, 0.05 to 0.25 parts of anti-cracking agent, 1 to 8 parts of foaming agent, in which magnesium sulfate is prepared by adding deionized water A magnesium sulfate solution with a mass fraction of 25%; wherein, manganese dioxide is used as a catalyst, and potassium citrate and potassium dihydrogen phosphate are additives. The preparation includes the following steps: step 1, mixing and stirring active magnesium oxide, manganese dioxide, potassium dihydrogen phosphate, potassium citrate, and foam stabilizer powder according to the above ratio; step 2, adding magnesium sulfate with a mass fraction of 25% Stir the solution to fully mix the powder and the solution; step 3, add the anti-cracking agent and stir for 1 minute, and finally add the foaming agent and stir for 30 seconds, then quickly pour it into the mold for molding. The invention has the advantages of light weight, good heat preservation effect, small water absorption rate, high lightness and the like.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a thermal insulation material, in particular to a preparation method of a basic magnesium sulfate cement foam concrete thermal insulation material. Background technique [0002] Concrete structural material is currently the most widely used building material, providing a raw material basis for the construction of modern high-rise buildings. But concrete structure buildings also have some obvious shortcomings and disadvantages. For example, the thermal conductivity of concrete materials is relatively large, and the thermal insulation effect of buildings built with concrete materials is relatively poor. In the north where heating is required in winter, a large amount of indoor heat will be transferred to the outside through concrete structures, resulting in insufficient energy utilization and serious waste. Therefore, paving suitable insulation materials on the periphery of concrete buildi...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used building insulation materials mainly include: foamed concrete produced with aluminate cement and sulphoaluminate cement as cementitious materials, but the strength of foamed concrete insulation materials produced with such cementitious materials will be significant in the later stage of use. Reduce or even produce cracking phenomenon

Secondly, the foamed concrete produced based on magnesium oxychloride cement has some significant advantages, such as good thermal insulation effect, frost resistance, excellent mechanical properties, fire resistance, etc., but it also has very obvious disadvantages - low softening coefficient, poor water resistance, Since most building insulation materials are in contact with the external environment, they will inevitably contact with rainwater, resulting in performance degradation, which seriously limits its application and development.

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