Modified magnesium cement light wallboard

A light-weight wallboard and magnesium cement technology, which is applied in the field of building materials, can solve problems such as large heat release, product warping and deformation, and product fragmentation, and achieve good sound insulation and heat preservation effects, difficult to control quality improvement, and stable and easy production process The effect of control

Inactive Publication Date: 2015-07-08
张禹 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Third, warping and deformation. Magnesium cement products release high heat during the hardening process. The temperature in the center of the reaction system can reach 140 degrees Celsius: in summer it may exceed 150 degrees Celsius: it is 3-3 degrees Celsius of ordinary Portland cement. 4 times. Due to the fast setting time of magnesium cement, the heat release is large, and thermal expansion causes product warping and deformatio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] Example 1

[0013] Prepare a 25° Baume sulphur-magnesium-phosphorus blend, in which 50% sulfuric acid 30Kg, heptahydrate 15Kg magnesium sulfate, 50% phosphoric acid 0.003Kg, the rest is water, and the qualified magnesium sulphate is tested by the magnesia meter. Phosphorus blending solution 100kg, spare.

[0014] Take 1Kg of ionic cement foaming agent, add 40 times of water to dilute, and set aside.

[0015] Preparation of magnesium cement slurry: Take 100 kg of light burned magnesium oxide, the active ingredient content of which is 70-85%, and the fineness is 150-200 mesh. Take 20Kg of fly ash and expanded perlite each. Take 0.5Kg of chopped vinylon engineering fiber. Put 100kg of light-burned magnesia, 20kg of coal ash and expanded perlite, and 80kg of sulphur-magnesium-phosphorus blending solution into the mixer. While stirring, put in 0.5kg chopped vinylon engineering fiber, and the fiber length can be 5-15mm. After the mixing is complete, the high-pressure gas foaming...

Example Embodiment

[0017] Example 2

[0018] Prepare a blend of magnesium sulfate and phosphorus with a Baume degree of 20°, in which 30Kg sulfuric acid with a concentration of 50%, magnesium sulfate heptahydrate 15Kg, a concentration of 50% phosphoric acid 0.003Kg, and the rest is water. 150kg of phosphorus blending solution, spare.

[0019] Take 1Kg of ionic cement foaming agent, dilute with 35 times of water, and set aside.

[0020] Preparation of magnesium cement slurry: Take 100 kg of light burned magnesium oxide, the active ingredient content of which is 70-85%, and the fineness is 150-200 mesh. Take 30Kg of fly ash and 5Kg of polystyrene foam particles. Take 0.6Kg of chopped vinylon engineering fiber. Put 100kg of light burned magnesia, 30kg of coal ash, 5kg of polystyrene foam particles and 70kg of sulphur-magnesium-phosphorus blending solution into the mixer, while stirring, put in 0.6kg of chopped vinylon engineering fiber, the fiber length is 5-15mm. After the mixing is complete, the hig...

Example Embodiment

[0022] Example 3

[0023] Prepare a blend of magnesium sulfide and phosphorus with a Baume degree of 28°, including 30Kg of sulfuric acid with a concentration of 50%, 15Kg of magnesium sulfate heptahydrate, 0.003Kg of phosphoric acid with a concentration of 50%, and the rest is water. 150kg of phosphorus blending solution, spare.

[0024] Take 6Kg of ionic cement foaming agent, add 40 times of water to dilute, and set aside.

[0025] Preparation of magnesium cement slurry: Take 100 kg of light burned magnesium oxide, the active ingredient content of which is 70-85%, and the fineness is 150-200 mesh. Take 40Kg of fly ash. Take 1Kg of chopped vinylon engineering fiber. Put 100kg of light-burned magnesia, 40kg of coal ash and 60kg of sulphur-magnesium-phosphorus blending solution into the mixer. While stirring, put into 1kg chopped vinylon engineering fiber, the fiber length is 5-15mm. After the mixing is complete, the high-pressure gas foaming machine injects the dilute diluent of ...

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PUM

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Abstract

The invention provides a modified magnesium cement light wallboard. The modified magnesium cement light wallboard is composed of a foaming agent and the following components in parts by weight: 100 parts of magnesium oxide, 5-40 parts of fly ash and/or expanded perlite and polystyrene foam plastic light fillers, 60-80 parts of a sulfur-magnesium-phosphorus blending solution with the baume degree of 20-28 degrees, wherein the sulfur-magnesium-phosphorus blending solution is composed of the following components in parts by weight: 1 part of 50% sulfuric acid, 0.5 part of magnesium sulfate heptahydrate and 0.001 part of 50% phosphoric acid; and the volume ratio of the air bubble volume of the foaming agent to the total volume of the components is (4-5.8) to 1. According to the modified magnesium cement light wallboard, the sulfur-magnesium-phosphorus blending solution is used for replacing a magnesium chloride solution in the prior art, and magnesium chloride with strong activity and poor stability is removed; the technical problem that the quality of a magnesium cement wallboard is difficult to control is basically improved; and the defects, which are difficult to solve for a long period, that the magnesium cement wallboard has efflorscence halogenation and warping deformation, and corrodes a metal components, caused by chloridions are overcome.

Description

technical field [0001] The invention belongs to building materials, in particular to a modified magnesium cement lightweight wallboard. Background technique [0002] Magnesium cement wallboard is a kind of air-hardening cementitious material obtained by two-component mixing of activated magnesium oxide and industrial magnesium chloride solution. It has the superior properties of high early strength, low alkalinity and high flexural strength at room temperature. Magnesium cement Also commonly known as magnesium oxychloride cement. [0003] However, for a long time, magnesium cement products have the disadvantages of moisture absorption and brine return, which are still difficult to overcome. One is poor water resistance. The hydrate of magnesium cement is hydrophilic, and water can destabilize its crystal structure and eventually disintegrate. Use in wet or rainy environments. Second, brine reversion and frosting. Brine reversion means that water droplets or viscous water d...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/10
Inventor 张禹章玉静张永胜
Owner 张禹
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