阅读说明：本技术 一种基于废弃沥青制备保温材料的方法 (Method for preparing heat insulation material based on waste asphalt ) 是由 林培双 陈志威 王言 于 2019-11-01 设计创作，主要内容包括：本发明属于废弃物再利用技术领域,具体涉及一种基于废弃沥青制备保温材料的方法。本发明通过盐酸对沥青进行预处理,一是可以将其中的杂质进行去除,二是通过盐酸提高废弃沥青的活性,虽然在于混合单体进行混合,通过混合单体进行聚合反应,提高废弃沥青的分散性,同时提高废弃沥青内部的结合性能,并且对添加颗粒进行包裹,可以有效增加力学性能,最后与废玻璃粉等进行混合,煅烧,在煅烧过程中,首先通过利用聚合物的分解,产生气体,形成空隙,其次沥青变软化,增加了与其他颗粒间的粘结性能,同时膨润土进行膨胀,形成颗粒间的空隙,进一步增强了保温性能,可以有效形成内部网状结构,提高保温性。(The invention belongs to the technical field of waste recycling, and particularly relates to a method for preparing a heat-insulating material based on waste asphalt. According to the invention, the asphalt is pretreated by hydrochloric acid, firstly, impurities in the asphalt can be removed, secondly, the activity of the waste asphalt is improved by hydrochloric acid, although the mixed monomers are mixed, the mixed monomers are subjected to polymerization reaction to improve the dispersibility of the waste asphalt and simultaneously improve the bonding performance in the waste asphalt, and the added particles are wrapped, so that the mechanical property can be effectively improved, and finally, the waste glass powder and the like are mixed and calcined.)

1. A method for preparing a heat insulation material based on waste asphalt is characterized by comprising the following steps:

(1) crushing waste asphalt, collecting crushed materials, mixing the crushed materials with hydrochloric acid according to a mass ratio of 3: 5-7, standing, filtering, washing, drying, and collecting dried materials, wherein 130-140 parts by weight of mixed solvent, 50-60 parts by weight of dried materials, 30-35 parts by weight of mixed monomer, 22-24 parts by weight of added particles, 15-17 parts by weight of water, 8-12 parts by weight of emulsifier, and 3-6 parts by weight of initiator are taken;

(2) firstly, putting a mixed solvent, a dried substance and an emulsifier into a reaction kettle, heating, preheating, stirring and mixing, adjusting the pH to 7.5-8.0, adding a mixed monomer, heating, adding an addition particle and an initiator, stirring and reacting, adding water, and mixing;

(3) after mixing, cooling to room temperature, standing, discharging, collecting a discharged material, freeze-drying, and collecting a dried material, wherein 190-210 parts by weight of water, 80-85 parts by weight of the dried material, 20-25 parts by weight of waste glass powder, 15-17 parts by weight of bentonite, and 0.1-0.8 part by weight of a thickening agent are taken;

(4) firstly, putting water, a dried substance, waste glass powder and bentonite into a ball mill for ball milling, adding a thickening agent, stirring and mixing, putting into a grinding tool for pressing, demoulding, putting into a calcining furnace, heating to 600-630 ℃, sintering, heating to 980-1020 ℃, preserving heat, and cooling to obtain the heat preservation material.

2. The method for preparing the heat-insulating material based on the waste asphalt as claimed in claim 1, wherein the mixed solvent is formed by mixing n-hexane and xylene according to a volume ratio of 6: 3-5.

3. The method for preparing the heat-insulating material based on the waste asphalt as claimed in claim 1, wherein the mixed monomer is prepared by mixing methyl methacrylate, acrylic acid and acrylamide according to a mass ratio of 6: 1-4: 2-4.

4. The method for preparing the thermal insulation material based on the waste asphalt as claimed in claim 1, wherein the additive particles are formed by mixing any two of porous silica, alumina and carbonate according to any mass ratio.

5. The method for preparing heat preservation material based on waste asphalt as claimed in claim 4, wherein the carbonate is any one of calcium carbonate and magnesium carbonate.

6. The method for preparing heat insulation material based on waste asphalt as claimed in claim 1, wherein the emulsifier is any one of monoglyceride and polyoxyethylene xylitol anhydride monostearate.

7. The method for preparing heat insulating material based on waste asphalt as claimed in claim 1, wherein the initiator is any one of sodium persulfate and ammonium persulfate.

8. The method for preparing insulation material based on waste asphalt as claimed in claim 1, wherein the thickener is sodium polyacrylate.

Technical Field

The invention belongs to the technical field of waste recycling, and particularly relates to a method for preparing a heat-insulating material based on waste asphalt.

Background

The maintenance, repair and reconstruction of asphalt concrete road surface produces millions of tons of huge road surface materials of the asphalt mixture which is dug and milled. The generation of a large amount of pavement materials causes serious environmental pollution on one hand, and on the other hand, the asphalt is a great waste of resources, if the waste asphalt pavement materials can be recycled, the resource utilization rate is improved, and the environmental pollution is reduced; therefore, how to fully utilize the waste asphalt pavement materials becomes a technical problem to be solved urgently in the field.

Along with the development of economic society, the current noise pollution is increasingly serious, various diseases caused by noise are increased day by day, and the health of people is engulfed. Therefore, the noise pollution has become the fourth pollution in the world following the air pollution, the water pollution and the solid waste pollution, and has become an environmental pollution which causes harm to the life, work and mind of people. Meanwhile, people pay more and more attention to the quality of personal living space and the privacy of life, so the requirement on the sound insulation effect of buildings is increasingly improved.

The existing heat insulation materials mainly comprise organic heat insulation materials and inorganic heat insulation materials. The organic heat-insulating material mainly comprises a foamed polyurethane plate, a foamed polyethylene plate, a foamed polystyrene plate, an extruded polystyrene plate, a phenolic resin foam plate and the like. The organic heat-insulating material has small heat conductivity coefficient and good heat-insulating effect, but the organic heat-insulating material is easy to burn and is not suitable for the field with strict requirements on fire hazard, and once a fire breaks out, the spreading of flame can be accelerated, and a large amount of toxic gas is discharged; in addition, the organic heat-insulating material has large deformation coefficient, poor stability and poor safety. The inorganic heat-insulating material mainly comprises vermiculite, perlite, calcium silicate, foaming cement, mineral wool, glass wool and the like. Compared with organic heat-insulating materials, inorganic heat-insulating materials have larger heat conductivity coefficient and slightly poorer heat-insulating effect.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: aiming at the problems that waste asphalt is easy to cause resource waste and the heat-insulating material is poor, the method for preparing the heat-insulating material based on the waste asphalt is provided.

In order to solve the technical problems, the invention adopts the following technical scheme:

a method for preparing a heat insulation material based on waste asphalt comprises the following steps:

(1) crushing waste asphalt, collecting crushed materials, mixing the crushed materials with hydrochloric acid according to a mass ratio of 3: 5-7, standing, filtering, washing, drying, and collecting dried materials, wherein 130-140 parts by weight of mixed solvent, 50-60 parts by weight of dried materials, 30-35 parts by weight of mixed monomer, 22-24 parts by weight of added particles, 15-17 parts by weight of water, 8-12 parts by weight of emulsifier, and 3-6 parts by weight of initiator are taken;

(2) firstly, putting a mixed solvent, a dried substance and an emulsifier into a reaction kettle, heating, preheating, stirring and mixing, adjusting the pH to 7.5-8.0, adding a mixed monomer, heating, adding an addition particle and an initiator, stirring and reacting, adding water, and mixing;

(3) after mixing, cooling to room temperature, standing, discharging, collecting a discharged material, freeze-drying, and collecting a dried material, wherein 190-210 parts by weight of water, 80-85 parts by weight of the dried material, 20-25 parts by weight of waste glass powder, 15-17 parts by weight of bentonite, and 0.1-0.8 part by weight of a thickening agent are taken;

(4) firstly, putting water, a dried substance, waste glass powder and bentonite into a ball mill for ball milling, adding a thickening agent, stirring and mixing, putting into a grinding tool for pressing, demoulding, putting into a calcining furnace, heating to 600-630 ℃, sintering, heating to 980-1020 ℃, preserving heat, and cooling to obtain the heat preservation material.

The mixed solvent is formed by mixing n-hexane and xylene according to a volume ratio of 6: 3-5.

The mixed monomer is formed by mixing methyl methacrylate, acrylic acid and acrylamide according to the mass ratio of 6: 1-4: 2-4.

The additive particles are formed by mixing any two of porous silicon dioxide, alumina and carbonate according to any mass ratio.

The carbonate is any one of calcium carbonate and magnesium carbonate.

The emulsifier is any one of monoglyceride fatty acid glyceride and polyoxyethylene xylitol anhydride monostearate.

The initiator is any one of sodium persulfate and ammonium persulfate.

The thickening agent is sodium polyacrylate.

Compared with other methods, the method has the beneficial technical effects that:

according to the invention, the asphalt is pretreated by hydrochloric acid, firstly, impurities in the asphalt can be removed, secondly, the activity of the waste asphalt is improved by hydrochloric acid, although the mixed monomers are mixed, the mixed monomers are subjected to polymerization reaction to improve the dispersibility of the waste asphalt and simultaneously improve the bonding performance in the waste asphalt, and the added particles are wrapped, so that the mechanical property can be effectively improved, and finally, the waste glass powder and the like are mixed and calcined.

Detailed Description

The mixed solvent is formed by mixing n-hexane and xylene according to a volume ratio of 6: 3-5.

The mixed monomer is formed by mixing methyl methacrylate, acrylic acid and acrylamide according to the mass ratio of 6: 1-4: 2-4. The additive particles are formed by mixing any two of porous silicon dioxide, alumina and carbonate according to any mass ratio. The carbonate is one of calcium carbonate and magnesium carbonate.

The emulsifier is any one of monoglyceride fatty acid glyceride and polyoxyethylene xylitol anhydride monostearate. The initiator is any one of sodium persulfate and ammonium persulfate.

The thickening agent is sodium polyacrylate.

A method for preparing a heat insulation material based on waste asphalt comprises the following steps:

(1) crushing waste asphalt, collecting crushed materials, mixing the crushed materials with 0.9mol/L hydrochloric acid according to a mass ratio of 3: 5-7, standing for 5 hours, filtering, washing, drying, and collecting dried materials, wherein 130-140 parts by weight of mixed solvent, 50-60 parts by weight of dried materials, 30-35 parts by weight of mixed monomer, 22-24 parts by weight of added particles, 15-17 parts by weight of water, 8-12 parts by weight of emulsifier, and 3-6 parts by weight of initiator are taken;

(2) firstly, putting a mixed solvent, a dried substance and an emulsifier into a reaction kettle, heating to 50 ℃, preheating for 3 hours, stirring and mixing, adjusting the pH to 7.5-8.0, adding a mixed monomer, heating to 110 ℃, adding an addition particle and an initiator, stirring and reacting for 8 hours, adding water, and mixing for 50 minutes;

(3) after mixing, cooling to room temperature, standing for 15 hours, discharging, collecting discharged materials, freeze-drying, collecting dried materials, and taking 190-210 parts of water, 80-85 parts of dried materials, 20-25 parts of waste glass powder, 15-17 parts of bentonite and 0.1-0.8 part of thickening agent according to parts by weight;

(4) firstly, putting water, a dried substance, waste glass powder and bentonite into a ball mill for ball milling for 1h at a speed of 600r/min, adding a thickening agent, stirring and mixing, putting into a grinding tool for pressing, demoulding, putting into a calcining furnace, heating to 600-630 ℃, sintering for 1h, heating to 980-1020 ℃, preserving heat for 2h, and cooling to room temperature to obtain the heat preservation material.