阅读说明：本技术 一种轻质高强度防水防电磁辐射的建筑材料的制备方法 (Preparation method of light high-strength waterproof electromagnetic radiation-resistant building material ) 是由 徐立新 徐恒 徐旭 于 2019-10-21 设计创作，主要内容包括：一种轻质高强度防水防电磁辐射的建筑材料的制备方法,包括以下步骤：(1)将氯化镁和氨水进行反应生成含有Mg<Sub>3</Sub>(OH)<Sub>5</Sub>Cl晶须的氯化镁溶液；(2)将步骤(1)所得含有Mg<Sub>3</Sub>(OH)<Sub>5</Sub>Cl晶须的氯化镁溶液与菱苦土混合,得氯氧镁水泥泥浆；(3)将步骤(2)所得氯氧镁水泥泥浆掺入铁氧体磨削废料,混合均匀,得混合料；(4)将步骤(3)所得混合料加入磷酸二氢铝作为防水剂,搅拌均匀,即成。本发明制得的产品轻质高强度,防水,防电磁辐射,且操作简单,成本低。(A preparation method of a light high-strength waterproof electromagnetic radiation-proof building material comprises the following steps: (1) reacting magnesium chloride with ammonia water to generate Mg 3 (OH) 5 Magnesium chloride solution of Cl whisker; (2) the Mg contained in the step (1) 3 (OH) 5 Mixing the magnesium chloride solution of Cl whisker with magnesia to obtain magnesium oxychloride cement slurry; (3) adding the magnesium oxychloride cement slurry obtained in the step (2) into ferrite grinding waste, and uniformly mixing to obtain a mixture; (4) and (4) adding aluminum dihydrogen phosphate serving as a waterproof agent into the mixture obtained in the step (3), and uniformly stirring to obtain the water-proof agent. The product prepared by the invention has the advantages of light weight, high strength, water resistance, electromagnetic radiation resistance, simple operation and low cost.)

1. A preparation method of a light high-strength waterproof electromagnetic radiation-proof building material is characterized by comprising the following steps: the method comprises the following steps:

(1) reacting magnesium chloride with ammonia water to generate Mg₃(OH)₅Magnesium chloride solution of Cl whisker;

(2) the Mg contained in the step (1)₃(OH)₅Mixing the magnesium chloride solution of Cl whisker with magnesia to obtain magnesium oxychloride cement slurry;

(3) adding the magnesium oxychloride cement slurry obtained in the step (2) into ferrite grinding waste, and uniformly mixing to obtain a mixture;

(4) and (4) adding aluminum dihydrogen phosphate into the mixture obtained in the step (3), and uniformly stirring to obtain the aluminum phosphate-aluminum alloy.

2. The method for preparing the light high-strength waterproof electromagnetic radiation-proof building material as claimed in claim 1, wherein: in the step (1), the molar ratio of the magnesium chloride to the ammonia water is 3-4: 1, and the reaction temperature is 50-60 ℃.

3. The method for preparing the light high-strength waterproof electromagnetic radiation-proof building material as claimed in claim 1 or 2, wherein: in the step (2), the molar ratio of the magnesia to the magnesium chloride is 8-10: 1.

4. The method for preparing a lightweight, high-strength, waterproof, electromagnetic radiation-proof building material according to any one of claims 1 to 3, wherein: in the step (3), the addition amount of the ferrite grinding waste is 15-25% of the mass of the magnesium oxychloride cement slurry.

5. The method for preparing the lightweight high-strength waterproof electromagnetic radiation-proof building material according to any one of claims 1 to 4, wherein: the granularity of the ferrite grinding waste is more than or equal to 200 meshes.

6. The method for preparing a lightweight, high-strength, waterproof, electromagnetic radiation-proof building material according to any one of claims 1 to 5, wherein: in the step (3), the ferrite grinding material is formed by mixing MnZn ferrite grinding material and Sr ferrite grinding material.

7. The method for preparing the light high-strength waterproof electromagnetic radiation-proof building material as claimed in claim 6, wherein: the mass ratio of the MnZn ferrite grinding material to the Sr ferrite grinding material is 3-4: 1.

8. The method for preparing a lightweight, high-strength, waterproof, electromagnetic radiation-proof building material according to any one of claims 1 to 7, wherein: the addition amount of the aluminum dihydrogen phosphate is 1.0-1.5% of the mass of the mixture.

Technical Field

The invention relates to a preparation method of a building material, in particular to a preparation method of a light high-strength waterproof anti-electromagnetic radiation building material.

Background

Known magnesium oxychloride waterThe mud is prepared from magnesite (light burned MgO) as cementing agent and bittern (MgCl)₂Solution) is prepared as a blender by mixing. The cement can be quickly hardened at normal temperature to form the artificial stone with high hardness and high brittleness. The cement has poor water resistance, the waterproof effect can be improved by adding the fly ash, the ferrous sulfate and the phosphate,

CN 102850034A discloses a chlorine-magnesium cement composite foaming insulation board and a preparation method thereof, wherein the chlorine-magnesium cement composite foaming insulation board is composed of the following raw materials: magnesium oxide, magnesium chloride, water, fly ash, a water-retaining agent, a water repellent, a modifier, fiber polyphenyl particles and a foaming agent. The preparation method comprises the following steps: pouring magnesium oxide, fly ash, a water-retaining agent, a water repellent and fibers into a stirrer to prepare dry powder; adding magnesium chloride and a modifier into water to prepare a liquid material, and adding a dry powder material to prepare a mixture; pouring the polyphenyl granules into the mixture, and stirring until the mixed solution uniformly wraps the polyphenyl granules to prepare slurry; adding a foaming agent to prepare foam slurry; injecting the foam slurry into a mold with the bottom paved with glass fiber mesh cloth; and after the mould is filled, laying a layer of glass fiber mesh cloth on the upper layer of the foam slurry, and pressing the glass fiber mesh cloth for forming. The method can make the cement fluffy and low in density by adding the foaming agent and the polyphenyl granules, but cannot isolate electromagnetic radiation.

CN 101623894A discloses a processing method of a light inorganic foaming perlite fireproof door core board, which comprises the steps of 1, preparing magnesium chloride aqueous solution, 2, preparing magnesium chloride cement slurry, 3, preparing mixed slurry comprising magnesium chloride cement slurry, a modifier, expanded perlite and chopped glass fiber, 4, preparing foaming mixed slurry, 5, preparing a board, naturally curing for 8-12 hours at room temperature, demoulding, and continuing to cure for 15 days under the same conditions after demoulding. The method can improve the strength by adding various organic fiber materials or glass fiber cloth, but cannot isolate electromagnetic radiation.

The existing technology related to magnesium oxychloride cement is only limited to improving the performance of the magnesium oxychloride cement as a building material, the protection requirement on electromagnetic radiation is more and more emphasized at present, and the function of the magnesium oxychloride cement against electromagnetic wave radiation is not deeply researched.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects in the prior art and provide a preparation method of a light high-strength waterproof anti-electromagnetic radiation building material, wherein the preparation method is simple to operate and low in cost.

The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of a light high-strength waterproof electromagnetic radiation-proof building material comprises the following steps:

(1) reacting magnesium chloride with ammonia water to generate Mg₃(OH)₅Magnesium chloride solution of Cl whisker;

(2) will contain Mg₃(OH)₅Mixing the magnesium chloride solution of Cl whisker with magnesia to obtain magnesium oxychloride cement slurry;

(3) adding the magnesium oxychloride cement slurry obtained in the step (2) into ferrite grinding waste, and uniformly mixing to obtain a mixture;

(4) and (4) adding aluminum dihydrogen phosphate into the mixture obtained in the step (3), and uniformly stirring to obtain the aluminum phosphate-aluminum alloy.

Further, in the step (1), the molar ratio of the magnesium chloride to the ammonia water is 3-4: 1, and the reaction temperature is 50-60 ℃.

Further, in the step (2), the molar ratio of the magnesia to the magnesium chloride is 8-10: 1.

further, in the step (3), the addition amount of the ferrite grinding waste is 15-25% of the mass of the magnesium oxychloride cement slurry.

Further, the granularity of the ferrite grinding waste is more than or equal to 200 meshes.

Further, the ferrite grinding material is formed by mixing MnZn ferrite grinding material and Sr ferrite grinding material.

Further, the mass ratio of the MnZn ferrite grinding material to the Sr ferrite grinding material is 3-4: 1.

Further, in the step (4), the adding amount of the aluminum dihydrogen phosphate is 1.0-1.5% of the mass of the mixture.

The invention has the beneficial effects that: mg is generated by the reaction of magnesium chloride and ammonia water₃(OH)₅Cl whisker, the Mg₃(OH)₅The Cl whisker not only ensures the strength of the product, but also leads the product to be lighter; in addition, the ferrite grinding material is added, so that the material has the electromagnetic wave absorption capacity, the hardness and the water resistance of the material are enhanced, and the ferrite grinding material is suitable for coating the inner wall and the outer wall of a building; in addition, the used ferrite grinding waste is low in cost, changes waste into valuable, and provides an application for ferrite industrial waste; aluminum dihydrogen phosphate is added, so that the waterproof performance of the material is further enhanced.

Drawings

FIG. 1 is a wave-absorbing characteristic curve diagram of a building material prepared in example 1 of the present invention;

FIG. 2 is a wave-absorbing characteristic curve diagram of a building material prepared in example 2 of the present invention;

FIG. 3 is a wave-absorbing characteristic curve diagram of a building material prepared in example 3 of the present invention;

FIG. 4 is a wave-absorbing characteristic curve diagram of a building material prepared in example 4 of the present invention;

FIG. 5 is a wave-absorbing characteristic curve diagram of the building material prepared in comparative example 1;

FIG. 6 is a wave-absorbing characteristic curve diagram of the building material prepared in comparative example 2.

Detailed Description

The invention is further illustrated by the following examples and figures.

The chemical reagents used in the examples of the present invention, unless otherwise specified, are commercially available in a conventional manner.

The wave-absorbing test instrument and method of the product prepared by the embodiment comprise the following steps: the samples are prepared into 18 x 3cm samples, cured for 24 hours and tested, and a proper amount of network analyzer of Agilent N5230A is used for testing the vertical reflectivity curve of the samples in the range of 2-18GHz by an arch method.

The strength test method comprises the following steps: the samples were prepared into 4X 16cm samples, and the compressive strength and the flexural strength of the samples were measured according to the national standard GB/T17671-1999 using a Mewachang model YAW-300/100 electrohydraulic bending and compression tester.