阅读说明：本技术 一种建筑用防水保温材料的制备方法 (Preparation method of waterproof heat-insulation material for building ) 是由 章代红 陶方红 邹庆硕 杨勇 于 2019-12-04 设计创作，主要内容包括：本发明涉及新材料加工技术领域,公开了一种建筑用防水保温材料的制备方法,将制备得到的防水材料加入到水泥基保温材料浆料中,高速混合均匀,倒入模具中,制备建筑用防水保温材料,该防水材料能够在无机保温材料体系中相互填充,使得内部结构形成憎水薄膜,抑制水化反应的影响作用,降低了粘结剂的用量,克服了防水性较差的问题,施工过程中,需水量显著降低,不会对保温材料的抗压强度造成削弱作用,显著提高了保温材料的保温隔热性能,导热系数低至0.033-0.035W/(m·K),且防火性能也得到了一定程度的提升。(The invention relates to the technical field of new material processing, and discloses a preparation method of a waterproof and heat-insulating material for buildings, which comprises the steps of adding the prepared waterproof material into cement-based heat-insulating material slurry, uniformly mixing at a high speed, pouring into a mold, and preparing the waterproof and heat-insulating material for buildings, wherein the waterproof material can be mutually filled in an inorganic heat-insulating material system, so that a hydrophobic film is formed in an internal structure, the influence of hydration reaction is inhibited, the using amount of a binder is reduced, the problem of poor water resistance is solved, the water demand is remarkably reduced in the construction process, the compression strength of the heat-insulating material cannot be weakened, the heat-insulating property of the heat-insulating material is remarkably improved, the heat conductivity coefficient is as low as 0.033-0.035W/(m.K), and the fire resistance is also improved to a certain degree.)

1. A preparation method of a waterproof heat-insulating material for buildings is characterized in that the prepared waterproof material is added into cement-based heat-insulating material slurry, uniformly mixed at a high speed and poured into a mold to prepare the waterproof heat-insulating material for buildings; the method comprises the following steps:

(1) weighing the following components in parts by weight: 100 portions of cement, 40 to 45 portions of fly ash, 10 to 12 portions of sepiolite, 4.0 to 4.2 portions of expanded perlite, 35 to 40 portions of hydrogen peroxide, 3.0 to 3.5 portions of manganese dioxide, 2.0 to 2.3 portions of sodium carboxymethylcellulose, 1.0 to 1.2 portions of waterproof material and 140 portions of water 130;

(2) adding cement, fly ash and water into a stirring barrel to obtain uniform and stable slurry, then adding sepiolite and expanded perlite, continuing stirring for 5-10 minutes, finally adding the rest materials except sodium carboxymethylcellulose and waterproof materials, stirring at a high speed of 1000 plus materials and 1200 rpm for 10-15 minutes, then adding sodium carboxymethylcellulose and waterproof materials, continuing stirring at a speed of 3000 plus materials and 3500 rpm for 1-2 minutes, pouring the obtained slurry into a mold, and demolding after film forming and curing.

2. The preparation method of the waterproof and heat-insulating material for the building as claimed in claim 1, wherein the preparation method of the waterproof material comprises the following steps: weighing 12-14 g of silicon oxide, 15-18 g of carbon powder and 33-35 g of calcium carbonate, placing the mixture in a vibration mill for grinding for 4-6 hours, placing the ground materials in a beaker for mixing, adding 110-120 ml of polyvinyl alcohol aqueous solution with the mass concentration of 2.5-3.0 percent into a beaker under stirring, continuously stirring at low speed for 20-30 minutes, then placing the mixture into a high-speed mixing roll to be mixed for 30-40 minutes to obtain a uniform mixture, pouring the uniform mixture into a ball milling tank, adding 2.0-3.0 g of aluminum powder into a ball milling tank, ball milling for 50-60 minutes to obtain a ball milling mixture, carrying out spray drying, filling the obtained dry powder mixture into a ceramic boat, placing the ceramic boat in a high-temperature tube furnace, under the protection of argon, the temperature is raised to 550-560 ℃ at the speed of 3-4 ℃/min, and the waterproof material is obtained after heat preservation and calcination for 2-3 hours.

3. The method for preparing the waterproof and heat-insulating material for the building as claimed in claim 1, wherein the method for preparing the expanded perlite in the step (1) comprises the following steps: weighing 1 kg of perlite, grinding the perlite into powder, adding 50-60 g of calcium oxide powder into the powder, uniformly mixing, continuously stirring at the speed of 150 plus materials and 200 rpm, adding 1.2-1.3 g of water into the mixed powder, standing for 5-6 hours, heating to 50-60 ℃ to evaporate water, placing the obtained material in a muffle furnace at the temperature of 300 plus materials and 340 ℃ to calcine for 1-2 hours, and naturally cooling along with the furnace.

4. The preparation method of the waterproof and heat-insulating material for the building as claimed in claim 1, wherein the mass concentration of the hydrogen peroxide in the step (1) is 23-25%.

5. The method for preparing the waterproof and heat-insulating material for the building as claimed in claim 1, wherein the curing conditions in the step (2) are as follows: the temperature is 20-24 ℃, the relative humidity is 95-97%, and the curing time is 18-20 hours.

6. The method for preparing waterproof and heat-insulating material for building as claimed in claim 2, wherein the argon flow rate is 300-320 ml/min.

7. The method for preparing the waterproof and heat-insulating material for the building as claimed in claim 2, wherein the particle size of the waterproof material is between 40 and 50 nanometers.

Technical Field

The invention belongs to the technical field of new material processing, and particularly relates to a preparation method of a waterproof heat-insulating material for a building.

Background

Heat insulation and preservation of buildings are important aspects of energy conservation, improvement of living environment and use functions. In recent years, the development of building thermal insulation materials is very rapid. The traditional heat-insulating material is mainly used for improving gas phase void ratio and reducing heat conductivity coefficient and conduction coefficient. The fiber type heat insulation material needs a thicker coating layer to increase the convection heat transfer and the radiation heat transfer in the use environment, and the section type inorganic heat insulation material needs to be assembled and constructed, so that the defects of more seams, loss of beauty, poor waterproofness, short service life and the like exist.

At present, building heat insulation materials are mainly used for wall heat insulation and can be divided into inner heat insulation, outer heat insulation and sandwich heat insulation. The mainly adopted heat insulation materials are inorganic composite heat insulation materials such as light and efficient glass wool, asbestos, foaming materials and the like. Because of the limited properties of the thermal insulation material, the thermal insulation material has no cohesiveness and large surface area, so that excessive addition of the binder is required, however, the water resistance of the thermal insulation material is obviously reduced, and the comprehensive performance, especially the thermal insulation performance, of the thermal insulation material is influenced. When the building thermal insulation material is used, the composite thermal insulation material loses the original achievable performance.

Disclosure of Invention

The invention aims to provide a preparation method of a waterproof heat-insulating material for buildings, which aims to solve the existing problems, has stable heat-insulating effect, small heat conductivity coefficient and good durability and is beneficial to the development of light weight, low cost and high performance of the heat-insulating material for buildings.

The invention is realized by the following technical scheme:

a preparation method of waterproof heat-insulating material for building, its preferred scheme is, add waterproof material that prepare into cement-based heat-insulating material slurry, mix at a high speed, pour into the mould, prepare waterproof heat-insulating material for building;

preparing a waterproof material: weighing 12-14 g of silicon oxide, 15-18 g of carbon powder and 33-35 g of calcium carbonate, placing the mixture in a vibration mill for grinding for 4-6 hours, placing the ground materials in a beaker for mixing, adding 110-120 ml of polyvinyl alcohol aqueous solution with the mass concentration of 2.5-3.0 percent into a beaker under stirring, continuously stirring at low speed for 20-30 minutes, then placing the mixture into a high-speed mixing roll to be mixed for 30-40 minutes to obtain a uniform mixture, pouring the uniform mixture into a ball milling tank, adding 2.0-3.0 g of aluminum powder into a ball milling tank, ball milling for 50-60 minutes to obtain a ball milling mixture, carrying out spray drying, filling the obtained dry powder mixture into a ceramic boat, placing the ceramic boat in a high-temperature tube furnace, heating to 550-560 ℃ at the speed of 3-4 ℃/min under the protection of argon, and carrying out heat preservation and calcination for 2-3 hours to obtain a waterproof material; the argon flow rate is 300-320 ml/min; the particle size of the waterproof material is 40-50 nanometers. The prepared waterproof material has high porosity and strong water resistance, and can obviously improve the compression strength and the bending strength of the heat-insulating material when being combined with a cement-based heat-insulating material.

The cement-based heat insulation material is prepared from the following components in parts by weight: 100 portions of cement, 40 to 45 portions of fly ash, 10 to 12 portions of sepiolite, 4.0 to 4.2 portions of expanded perlite, 35 to 40 portions of hydrogen peroxide, 3.0 to 3.5 portions of manganese dioxide, 2.0 to 2.3 portions of sodium carboxymethylcellulose, 1.0 to 1.2 portions of waterproof material and 140 portions of water 130; the preparation method comprises the following steps: adding cement, fly ash and water into a stirring barrel to obtain uniform and stable slurry, then adding sepiolite and expanded perlite, continuing stirring for 5-10 minutes, finally adding the rest materials except sodium carboxymethylcellulose and waterproof materials, stirring at a high speed of 1000 plus materials and 1200 rpm for 10-15 minutes, then adding sodium carboxymethylcellulose and waterproof materials, continuously stirring at a speed of 3000 plus materials and 3500 rpm for 1-2 minutes, pouring the obtained slurry into a mold, and demolding after film forming and maintenance; the curing conditions are as follows: the temperature is 20-24 ℃, the relative humidity is 95-97%, and the curing time is 18-20 hours.

The mass concentration of the hydrogen peroxide is 23-25%.

The preparation method of the expanded perlite comprises the following steps: weighing 1 kg of perlite, grinding the perlite into powder, adding 50-60 g of calcium oxide powder into the powder, uniformly mixing, continuously stirring at the speed of 150 plus materials and 200 rpm, adding 1.2-1.3 g of water into the mixed powder, standing for 5-6 hours, heating to 50-60 ℃ to evaporate water, placing the obtained material in a muffle furnace at the temperature of 300 plus materials and 340 ℃ to calcine for 1-2 hours, and naturally cooling along with the furnace.

The prepared nano-scale waterproof material has strong matching property with the cement-based heat insulation material, increases the self bonding capability, reduces the using amount of a bonding agent in construction, has good waterproof performance and excellent chemical corrosion resistance.

Compared with the prior art, the invention has the following advantages: in order to solve the problem of performance failure caused by poor waterproofness in the application process of the existing building heat-insulating material, the invention provides a preparation method of the building water-proof heat-insulating material, the prepared water-proof material is added into cement-based heat-insulating material slurry, the mixture is uniformly mixed at high speed and poured into a mould to prepare the building water-proof heat-insulating material, the water-proof material can be mutually filled in an inorganic heat-insulating material system, so that the internal structure forms a hydrophobic film, the influence of hydration reaction is inhibited, the using amount of a binder is reduced, the problem of poor waterproofness is overcome, the water demand is remarkably reduced in the construction process, the weakening effect on the compressive strength of the heat-insulating material is avoided, the heat-insulating property of the heat-insulating material is remarkably improved, the heat conductivity coefficient is as low as 0.033-0.035W/(m.K), the water absorption is reduced, the fireproof performance is improved to a certain degree; the invention can obviously improve the waterproof property of the heat-insulating material for the building, solves the problem of the reduction of the waterproof property of the heat-insulating material caused by the addition of the adhesive which is commonly adopted at present, can ensure the comprehensive use performance of the heat-insulating material, and obviously improves the economic benefit and the social benefit. The invention effectively solves the problem of reduced heat insulation performance caused by poor water resistance of the existing building heat insulation material, has the characteristics of low cost, low density and high performance, has stable heat insulation effect, small heat conductivity coefficient and good durability, is beneficial to the development of the building heat insulation material to light weight, low cost and high performance, can realize the practical significance of promoting the development of the building heat insulation material industry and improving the market competitiveness, has higher value for the performance research and application of the waterproof heat insulation material, obviously promotes the rapid development and the sustainable development of resources in the field of modern building heat insulation materials, and is a technical scheme which is extremely worthy of popularization and use.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described with reference to specific embodiments, and it should be understood that the specific embodiments described herein are only used for explaining the present invention and are not used for limiting the technical solutions provided by the present invention.