CN108975850A - A kind of light high-strength heat preservation material and preparation method thereof - Google Patents

Abstract

The invention provides a light-weight high-strength thermal insulation material, comprising: 80-140 parts of bulk industrial solid waste, 3-6 parts of cement, 0.5-1.2 parts of water reducing agent, 0.8-1.5 parts of composite activator, and 2-2 parts of foaming agent 5 parts, 1-4 parts of redispersible latex powder, 0.2-0.8 parts of polypropylene fiber, 46-58 parts of water, 10-15 parts of polystyrene particles. The prepared material has the advantages of light weight, high strength, fire prevention, heat preservation, energy saving, simple construction and low cost. The present invention also provides a preparation method of light heat preservation material, which utilizes bulk industrial solid waste as resources; the prepared heat preservation material Meets construction industry industry standards.

Description

A light-weight high-strength thermal insulation material and its preparation method

technical field

The invention relates to the technical field of building thermal insulation materials, in particular to a lightweight high-strength thermal insulation material and a preparation method thereof.

Background technique

Building materials, the materials used in buildings are collectively referred to as building materials. New building materials include a wide range, including thermal insulation materials, heat insulation materials, high-strength materials, and materials that can breathe, all of which are new materials. Building materials is a collective term for materials used in civil engineering and construction. In building materials, thermal insulation materials are generally materials with a thermal coefficient less than or equal to 0.2. Building thermal insulation is an important aspect of saving energy, improving the living environment and using functions. Building energy consumption generally accounts for 30-40% of the total energy consumption of human beings, most of which are heating and air conditioning energy consumption, so building energy conservation is of great significance.

At present, my country mainly uses two types of products in terms of building energy conservation and heat preservation. One type uses organic flammable, generally board insulation materials. During construction, fixed facilities such as adhesives and steel grids need to be added, resulting in high construction costs. Flammable, volatile and falling off, the surface is prone to cracks, and the thermal insulation performance is reduced; the other type is inorganic thermal insulation mortar, which has good fire resistance and high thermal conductivity, but poor thermal insulation performance. Due to the limitation of smearing thickness, the construction method is outdated, and it is not suitable for use in severe cold and cold areas.

Bulk industrial solid waste refers to the solid waste with an annual output of more than 10 million tons in the production activities of various industrial fields in my country and has a great impact on the environment and safety. It mainly includes: tailings, coal gangue, fly ash, smelting slag, Industrial by-products are gypsum, red mud and carbide slag. With the development of industrial production, the amount of industrial solid waste (industrial waste) is increasing day by day. It is passively stacked, occupies land, pollutes soil, water sources and the atmosphere, affects crop growth, and endangers human health. If processed properly, it can become industrial raw material or energy. Industrial solid Industrial solid waste (industrial waste treatment) is easier to realize recycling than waste water and waste gas.

Contents of the invention

The present invention aims at the problems existing in the existing thermal insulation materials, combined with the resource utilization of bulk industrial solid wastes such as desulfurized gypsum, steel slag, fly ash, etc., and provides a light-weight high-strength thermal insulation material, which is light, high-strength, fireproof , heat preservation, energy saving, simple construction and low cost, the invention also provides a preparation method of light weight and high strength heat preservation material.

A lightweight and high-strength thermal insulation material, comprising the following raw materials in parts by weight: 80-140 parts of bulk industrial solid waste, 3-6 parts of cement, 0.5-1.2 parts of water reducing agent, 0.8-1.5 parts of composite activator, foaming agent 2-5 parts, 1-4 parts of redispersible latex powder, 0.2-0.8 parts of polypropylene fiber, 46-58 parts of water, 10-15 parts of polystyrene particles.

The bulk industrial solid waste is composed of the following raw materials in parts by weight: 50-70 parts of desulfurized gypsum, 10-30 parts of steel slag, and 20-40 parts of fly ash; steel slag; the fineness of the fly ash is 310-430 mesh.

The treatment process of the desulfurized gypsum is as follows: after the wet flue gas desulfurized gypsum is dried, it is calcined at 150° C. for 180 minutes and aged for 7 days to obtain the gypsum used.

Further, the cement is ordinary Portland cement with a strength grade of 42.5.

Further, the water reducer is one of naphthalene water reducer or polycarboxylate water reducer.

Further, the composite activator is 1-2 parts of calcium chloride, 0.5-1 part of calcium oxide and 1.5-3 parts of aluminum sulfate.

Further, the foaming agent is hydrogen peroxide, and the concentration of hydrogen peroxide is 35%.

Further, the particle size of the polyphenylene particles is 1-3 mm, the bulk density is 15-18 kg/m ³ , and the thermal conductivity is ≤0.041 W/(m·k).

Further, the polypropylene fiber has a length of 6 mm to 12 mm, a diameter of 15 to 39 μm, and an elastic modulus of 2900 to 3680 MPa.

Further, the main active ingredient of the redispersible latex powder is ethylene-vinyl acetate copolymer, and its content is greater than or equal to 95wt%.

The present invention also provides a preparation method of the lightweight high-strength thermal insulation material, the specific steps are as follows:

(1) After mixing the raw materials, first stir slowly at a speed of 100-200r/min for 1-2 minutes, then stir quickly at a speed of 250-350r/min for 2-4 minutes to obtain a mixture;

(2) Then press the mixture in step (1) into shape, the pressure is 1-5MPa;

(3) After pressing and forming, place it at a temperature of 60°C to 90°C for 1 to 2 hours, and obtain a lightweight and high-strength thermal insulation material after demoulding.

The preparation and use method of the above-mentioned lightweight and high-strength thermal insulation material: This product uses desulfurized gypsum as the main coagulation material, polystyrene particles as lightweight aggregate, and uses hot-pressing technology to prepare lightweight and high-strength thermal insulation boards. The preparation process is simple and the production efficiency is high. The product has both the advantages of organic board and inorganic thermal insulation mortar, good fire resistance, not easy to crack, good thermal insulation, good water resistance, and has a certain strength. It can be directly used on the construction site without any processing. It is fixed with mortar or anchor bolts. That's it, the use process is simple, and it is suitable for use in various harsh environments such as cold and humidity.

Beneficial effect

1. Low cost

In view of the current research and utilization status of industrial waste and energy-saving and thermal insulation wall materials in my country, the present invention selects desulfurized gypsum, steel slag, and fly ash industrial solid waste as raw materials. The low cost of raw materials is conducive to improving the utilization rate of industrial waste such as desulfurized gypsum, achieving the purpose of treating waste with waste and benefiting environmental protection.

2. Meet the requirements of industry standards

The invention comprehensively utilizes various industrial solid wastes, and through the action of relevant additives, the thermal conductivity, compressive strength, flexural strength and softening coefficient of the thermal insulation material can all meet the standards of the construction industry.

3. Achieved a breakthrough in the key technology of desulfurized gypsum-based energy-saving and thermal insulation wall materials

Use physical and chemical composite methods to stimulate the potential chemical activity of solid waste materials, determine the optimal composition of the composite gelling material system and the way to effectively stimulate its hydration and hardening; add foaming agent to make the product form a porous gelling material , by adding high molecular weight polyethylene fiber and redispersible latex powder to improve the strength of the product. Realize breakthroughs in the basic theory and key technologies of desulfurized gypsum-based energy-saving and thermal insulation wall materials, and prepare new building materials with excellent properties such as light weight, high strength, thermal insulation, heat insulation, and water resistance that can be used as filling materials for building interior walls. The relevant technical indicators have reached relevant industry requirements.

Description of drawings

Figure 1 is a process diagram for the preparation of lightweight and high-strength thermal insulation materials made of bulk industrial solid waste polystyrene particles.

Detailed ways

Example 1

A method for preparing a lightweight high-strength thermal insulation material, comprising the following steps:

(1) 50 parts of desulfurized gypsum, 30 parts of steel slag, 20 parts of fly ash, 3 parts of cement, 0.5 parts of water reducing agent, 1.5 parts of composite activator, 2 parts of hydrogen peroxide, 4 parts of redispersible latex powder, 0.2 parts of polypropylene fiber parts, 46 parts of water, and 10 parts of polyphenylene particles are poured into the cement paste mixer, and first stirred slowly at a speed of 100r/min for 2 minutes, and then stirred quickly at a speed of 350r/min for 2 minutes;

(2) Then inject the uniformly stirred mixture into the sample mold required by the performance to be tested and press it into shape with a pressure of 1MPa;

(3) After pressing and forming, place it at a temperature of 90°C for 1 hour, and demould to obtain a lightweight insulation material of industrial solid waste polystyrene particles.

The treatment process of the desulfurized gypsum is as follows: after the wet flue gas desulfurized gypsum is dried, it is calcined at 150° C. for 180 minutes and aged for 7 days to obtain the gypsum used.

The steel slag is steel slag with 300-mesh residue ≤ 5%; the fineness of the fly ash is 310-430 mesh.

Further, the cement is Portland cement.

Further, the water reducer is polycarboxylate high performance water reducer PC-1016.

Further, the composite activator is 1 part of calcium chloride, 1 part of calcium oxide and 3 parts of aluminum sulfate.

Further, the foaming agent is hydrogen peroxide, and the concentration of hydrogen peroxide is 35%.

Further, the particle size of the polyphenylene particles is 1-3 mm, the bulk density is 15-18 kg/m ³ , and the thermal conductivity is ≤0.041 W/(m·k).

Further, the polypropylene fiber has a length of 6 mm to 12 mm, a diameter of 15 to 39 μm, and an elastic modulus of 2900 to 3680 MPa.

Further, the main active ingredient of the redispersible latex powder is ethylene-vinyl acetate copolymer, and its content is 95wt%.

Example 2

A method for preparing a lightweight high-strength thermal insulation material, comprising the following steps:

(1) 70 parts of desulfurized gypsum, 10 parts of steel slag, 20 parts of fly ash, 6 parts of cement, 1.2 parts of water reducing agent, 0.8 parts of composite activator, 5 parts of hydrogen peroxide, 1 part of redispersible latex powder, 0.8 parts of polypropylene fiber 58 parts of water and 15 parts of polyphenylene particles are poured into the cement slurry mixer, and first stirred slowly at a speed of 200r/min for 1 minute, and then stirred quickly at a speed of 250r/min for 4 minutes;

(2) Then inject the uniformly stirred mixture into the sample mold required by the performance to be tested and press it into shape with a pressure of 5MPa;

(3) After pressing and forming, place it at a temperature of 60°C for 2 hours, and demould to obtain a lightweight insulation material of industrial solid waste polystyrene particles.

The treatment process of the desulfurized gypsum is as follows: after the wet flue gas desulfurized gypsum is dried, it is calcined at 150° C. for 180 minutes and aged for 7 days to obtain the gypsum used.

The steel slag is steel slag with 300-mesh residue ≤ 5%; the fineness of the fly ash is 310-430 mesh.

Further, the cement is Portland cement.

Further, the water reducer is a naphthalene series high-efficiency water reducer FDN-C.

Further, the composite activator is 2 parts of calcium chloride, 0.5 parts of calcium oxide and 1.5 parts of aluminum sulfate.

Further, the foaming agent is hydrogen peroxide, and the concentration of hydrogen peroxide is 35%.

Further, the particle size of the polyphenylene particles is 1-3 mm, the bulk density is 15-18 kg/m ³ , and the thermal conductivity is ≤0.041 W/(m·k).

Further, the polypropylene fiber has a length of 6 mm to 12 mm, a diameter of 15 to 39 μm, and an elastic modulus of 2900 to 3680 MPa.

Further, the main active ingredient of the redispersible latex powder is ethylene-vinyl acetate copolymer, and its content is 96wt%.

Example 3

A method for preparing a lightweight high-strength thermal insulation material, comprising the following steps:

(1) 60 parts of desulfurized gypsum, 20 parts of steel slag, 30 parts of fly ash, 5 parts of cement, 0.8 parts of water reducing agent, 1.1 parts of composite activator, 4 parts of hydrogen peroxide, 3 parts of redispersible latex powder, 0.5 parts of polypropylene fiber 54 parts of water and 12 parts of polyphenylene particles are poured into the cement paste mixer and stirred slowly at a speed of 150r/min for 2 minutes, and then stirred quickly for 3 minutes at a speed of 280r/min;

(2) Then inject the uniformly stirred mixture into the sample mold required by the performance to be tested and press it into shape with a pressure of 3MPa;

(3) After pressing and forming, place it at a temperature of 80°C for 1.5 hours, and demould to obtain a lightweight thermal insulation material of industrial solid waste polystyrene particles.

The treatment process of the desulfurized gypsum is as follows: after the wet flue gas desulfurized gypsum is dried, it is calcined at 150° C. for 180 minutes and aged for 7 days to obtain the gypsum used.

The steel slag is steel slag with 300-mesh residue ≤ 5%; the fineness of the fly ash is 310-430 mesh.

Further, the cement is Portland cement.

Further, the water reducer is polycarboxylate high performance water reducer PC-1016.

Further, the composite activator is 1.5 parts of calcium chloride, 0.8 parts of calcium oxide and 2.5 parts of aluminum sulfate.

Further, the foaming agent is hydrogen peroxide, and the concentration of hydrogen peroxide is 35%.

Further, the particle size of the polyphenylene particles is 1-3 mm, the bulk density is 15-18 kg/m ³ , and the thermal conductivity is ≤0.041 W/(m·k).

Further, the polypropylene fiber has a length of 6 mm to 12 mm, a diameter of 15 to 39 μm, and an elastic modulus of 2900 to 3680 MPa.

Further, the main active ingredient of the redispersible latex powder is ethylene-vinyl acetate copolymer, and its content is 98%.

According to the industry standard JG/T 158-2013, the relevant performance indexes of the lightweight high-strength thermal insulation material prepared by the method of Examples 1-3 are shown in Table 1. As can be seen from Table 1, the density of the thermal insulation material prepared by the present invention is lower than that of the industry standard, but the strength fully meets the requirements of the industry standard, so the thermal insulation material prepared by the present invention has the characteristics of light weight and high strength.

Table 1 Relevant performance indicators of lightweight and high-strength thermal insulation materials

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art may make changes or modifications without creative work within the technical scope disclosed in the present invention. Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope defined in the claims.

Claims (10)

1. a kind of light high-strength heat preservation material, which is characterized in that the raw material including following parts by weight: large Industrial Solid Waste 80- 140 parts, 3-6 parts of cement, 0.5-1.2 parts of water-reducing agent, 0.8-1.5 parts of composite exciting agent, 2-5 parts of foaming agent, Redispersable latex 1-4 parts of powder, 0.2-0.8 parts of polypropylene fibre, 46-58 parts of water, 10-15 parts of granular polystyrene.

2. thermal insulation material according to claim 1, which is characterized in that large Industrial Solid Waste, by following parts by weight Several raw material composition: 50-70 parts of desulfurized gypsum, 10-30 parts of steel slag, 20-40 parts of flyash；The steel slag is 300 mesh screen residues ≤ 5% steel slag；The fineness of the flyash is 310~430 mesh.

3. thermal insulation material according to claim 1, which is characterized in that the treatment process of the desulfurized gypsum are as follows: wet process Desulfurized gesso of flue gas after drying, calcines 180min, ageing obtains gypsum used for 7 days at 150 DEG C.

4. thermal insulation material according to claim 1, which is characterized in that the cement is common portland cement, by force Spending grade is 42.5.

5. thermal insulation material according to claim 1, which is characterized in that the water-reducing agent is naphthalene water reducer or polycarboxylic acids One kind of water-reducing agent.

6. thermal insulation material according to claim 1, which is characterized in that the composite exciting agent is calcium chloride 1-2 parts, oxygen Change calcium 0.5-1 parts and aluminum sulfate 1.5-3 parts.

7. thermal insulation material according to claim 1, which is characterized in that the foaming agent is hydrogen peroxide, hydrogen peroxide concentration It is 35%.

8. thermal insulation material according to claim 1, which is characterized in that the granular polystyrene partial size is 1~3mm, accumulation Density is 15~18kg/m³, thermal coefficient≤0.041 W/ (mk)；The polypropylene fibre length is 6mm~12mm, directly Diameter is 15~39 μm, and elasticity modulus is 2900~3680MPa.

9. thermal insulation material according to claim 1, which is characterized in that the chief active of the redispersable latex powder at Dividing is ethylene-vinyl acetate copolymer, and content is more than or equal to 95wt%.

10. a kind of preparation method of thermal insulation material described in claim 1, which comprises the following steps:

(1) it after mixing raw material, is first stirred slowly 1~2 minute with the revolving speed of 100-200r/min, then with the revolving speed of 250-350r/min It stirs fastly 2~4 minutes, obtains mixture；

(2) then by the mixture compression moulding in step (1), pressure 1-5MPa；

(3) after compression moulding, it is placed into 1~2h of temperature 60 C~90 DEG C pressure maintaining, obtains light heat insulation material after demoulding.