Light magnesium phosphate cement prepared by foaming and preparation method thereof

Abstract

The invention relates to light magnesium phosphate cement prepared by foaming and a preparation method thereof. The light magnesium phosphate cement is prepared from the following raw materials in parts by weight: 35.0 to 40.2 parts of dead burned magnesium oxide, 35.0 to 40.2 parts of ammonium dihydrogen phosphate, 2.4 to 3.1 parts of borax, 4.0 to 14.0 parts of silica fume, 0.8 to 1.7 parts of fine wood flour, 0.04 to 0.14 part of polypropylene fiber, 7.2 to 7.4 parts of water, 0.14 to 0.16 part of a moisture-proof agent and 3.5 to 5.2 parts of an animal protein foaming agent. According to the invention, dead burned magnesium oxide and ammonium dihydrogen phosphate are subjected to a hydration reaction in an aqueous solution to generate a cementing material with certain strength, and meanwhile, the volume density of cement is reduced in a foaming manner, so that a lightweight magnesium phosphate cement board with relatively high mechanical properties and uniform internal structure is obtained.

Description

technical field [0001] The invention relates to the field of prefabricated building materials, in particular to a lightweight magnesium phosphate cement prepared by foaming and a preparation method thereof. Background technique [0002] At present, most of the boards used in the field of prefabricated buildings choose to add polyphenylene particles to magnesium phosphate cement to reduce density. The disadvantages of this method are as follows: 1. When the water-cement ratio of magnesium phosphate cement is high, due to the The specific gravity of the slurry is relatively large. After adding polyphenylene particles to the slurry, heavy phases will be deposited at the bottom during the gelation process, and polyphenylene particles will float on the surface, resulting in uneven material structure and affecting the mechanical properties of the board. . 2. The production process of polystyrene particles is more complex and costly than using animal foaming agents for foaming. 3...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the boards used in the field of prefabricated buildings choose to add polyphenylene particles to magnesium phosphate cement to reduce density. The disadvantages of this method are as follows: 1. When the water-cement ratio of magnesium phosphate cement is high, due to the The specific gravity of the slurry is relatively large. After adding polyphenylene particles to the slurry, heavy phases will be deposited at the bottom during the gelation process, and polyphenylene particles will float on the surface, resulting in uneven material structure and affecting the mechanical properties of the board.

2. The production process of polyphenylene particles is more complex and costly than using animal foaming agents for foaming

3. Polystyrene particles are flammable and produce toxic gas after burning