CN113582575B

CN113582575B - Multi-element solid waste environment-friendly base material and preparation method thereof

Info

Publication number: CN113582575B
Application number: CN202110907783.1A
Authority: CN
Inventors: 王群英; 柴淑媛; 魏雅娟
Original assignee: Huadian Electric Power Research Institute Co Ltd
Current assignee: Huadian Electric Power Research Institute Co Ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2022-08-05
Anticipated expiration: 2041-08-09
Also published as: CN113582575A

Abstract

The invention provides a multi-element solid waste environment-friendly base material which is formed by base material premix; the base material premix comprises: 100 parts by weight of a binder; 200-300 parts by weight of a modified mixture; 1-10 parts by weight of a stabilizer; 0.1-3 parts by weight of an internal lubricant; 0.1-3 parts by weight of an external lubricant; 1-10 parts of a toughening agent; 1-5 parts of a reinforcing agent; the modified mixture is solid waste modified by a modifier; the solid waste comprises building waste residue, fly ash and crystal slag. Compared with the prior art, the multi-element solid waste environment-friendly base material is prepared by taking materials such as fly ash, construction waste, crystal slag and the like as the filling materials, the strength of the prepared base material is improved, the performance is stable, the service life of the floor is greatly prolonged, the cost of raw materials can be greatly reduced, the waste utilization of resources can be realized, the environment is protected, and better social benefit, economic benefit and environmental benefit are achieved.

Description

Multi-element solid waste environment-friendly base material and preparation method thereof

Technical Field

The invention belongs to the technical field of building materials, and particularly relates to a multi-element solid waste environment-friendly base material and a preparation method thereof.

Background

With the development of the power industry, the emission amount of combustion residue fly ash is increased year by year, and a difficult task is present how to effectively utilize fly ash, increase the additional value of fly ash and develop new application of industrial solid waste. In addition, the fly ash has large specific surface area and high adsorption activity, and the particle size range of the particles is 0.5-300 mu m, so that the fly ash is a high-quality resource which is misplaced.

The crystal slag is generated in the processes of mechanical cutting, grinding and polishing of crystal products, and according to statistics, 30% of the crystal slag is generated every ton of crystal glass is processed. With the development of the crystal industry, more and more waste residues are generated, and the landfill site cannot bear the waste residues. Moreover, a large number of medium-small scale processing plants exist in the crystal industry, and waste residues are disorderly poured anywhere or directly discharged into rivers, so that the waste residues are deposited at the bottom of the river, and the soil and the rivers are seriously polluted. Therefore, the problem of crystal slag treatment is imminent.

At present, the floor is mainly a composite floor except a solid wood floor. The solid wood floor has the problems of low strength, short service life and high cost, and although the price of the composite floor is low, most of the composite floor is made of artificial boards and has high formaldehyde content, so that the use of the product can cause great harm to the health of human bodies.

Therefore, the present invention contemplates the use of solid waste to make environmentally friendly substrates.

Disclosure of Invention

In view of the above, the technical problem to be solved by the present invention is to provide a multi-component solid waste environment-friendly substrate with high strength and stable performance and a preparation method thereof.

The invention provides a multi-element solid waste environment-friendly base material which is formed by base material premix; the base material premix comprises:

the modified mixture is solid waste modified by a modifier;

the solid waste comprises building waste residues, fly ash and crystal slag;

the mass ratio of the building waste residue, the fly ash and the crystal waste residue is (25-35): (50-65): (10-20);

the modifier comprises one or two of stearic acid and a silane coupling agent and an organic oligomer.

Preferably, the building waste residue is selected from one or more of waste concrete, waste clay baked bricks, waste fly ash bricks, waste slag bricks, waste stone dust bricks and waste ceramics;

the silane coupling agent is selected from gamma-aminopropyltriethoxysilane and/or gamma-glycidoxypropyltrimethoxysilane;

the organic oligomer is selected from polyethylene wax and/or oxidized polyethylene wax.

Preferably, the mass of one or two of stearic acid and silane coupling agent is 0.5-2% of the mass of the solid waste; the mass of the organic oligomer is 1-3% of the mass of the solid waste.

Preferably, the particle size D90 of the solid waste is less than 80 μm; the water content is less than or equal to 4 percent.

Preferably, the binder is selected from one or more of polyvinyl chloride, polypropylene and rubber;

the stabilizer is selected from calcium zinc stabilizers;

the internal lubricant is selected from one or more of stearic acid, stearate, fatty acid ester and fatty alcohol;

the external lubricant is selected from one or more of polyethylene wax, paraffin wax, oxidized polyethylene wax and stearic acid;

the toughening agent is selected from acrylate toughening agents;

the reinforcing agent is selected from chlorinated polyethylene.

The invention also provides a preparation method of the multielement solid waste environment-friendly base material, which comprises the following steps:

s1) carrying out hot mixing on the binder, the modified mixture, the stabilizer, the internal lubricant, the external lubricant, the toughening agent and the reinforcing agent, and then carrying out cold mixing to obtain a base material premix;

s2) heating, blending and extruding the substrate premix to obtain the multi-element solid waste environment-friendly substrate.

Preferably, the modified mixture is prepared according to the following method:

mixing the solid waste with a modifier to obtain a modified mixture;

the mixing temperature is 80-100 ℃;

the mixing time is 10-60 min.

Preferably, the temperature of the hot mixing in the step S1) is 100-140 ℃; the hot mixing time is 10-20 min; the temperature of cold mixing is 40-60 ℃; the cold mixing time is 5-15 min;

the temperature for heating, blending and extruding in the step S2) is 160-200 ℃.

Preferably, after the heating and blending basis in the step S2), curing at room temperature to obtain the multi-element solid waste environment-friendly base material; the room-temperature curing time is 40-60 h.

The invention also provides application of the multielement solid waste environment-friendly base material as a floor base material.

The invention provides a multi-element solid waste environment-friendly base material which is formed by base material premix; the base material premix comprises: 100 parts by weight of a binder; 200-300 parts of modified mixture; 1-10 parts by weight of a stabilizer; 0.1-3 parts by weight of an internal lubricant; 0.1-3 parts by weight of an external lubricant; 1-10 parts of a toughening agent; 1-5 parts of a reinforcing agent; the modified mixture is solid waste modified by a modifier; the solid waste comprises building waste residues, fly ash and crystal slag; the mass ratio of the building waste residue, the fly ash and the crystal waste residue is (25-35): (50-65): (10-20); the modifier comprises one or two of stearic acid and a silane coupling agent and an organic oligomer. Compared with the prior art, the multi-element solid waste environment-friendly base material is prepared by taking materials such as fly ash, construction waste, crystal slag and the like as the filling materials, the strength of the prepared base material is improved, the performance is stable, the service life of the floor is greatly prolonged, the cost of raw materials can be greatly reduced, the waste utilization of resources can be realized, the environment is protected, and better social benefit, economic benefit and environmental benefit are achieved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

the modified mixture is solid waste modified by a modifier;

the solid waste comprises building waste residues, fly ash and crystal slag;

In the invention, one or more of polyvinyl chloride, polypropylene and rubber are preferably used as the binder, and polyvinyl chloride is more preferably used as the binder; the average polymerization degree of the polyvinyl chloride is preferably 800-1200, more preferably 900-1100, and further preferably 1000; in the embodiment provided by the invention, SG-5 type polyvinyl chloride is particularly used as a binder.

The modified mixture is used as a main filling material; the content of the modified mixture is preferably 200-280 parts by weight, more preferably 200-260 parts by weight, and further preferably 200-250 parts by weight; the modified mixture is solid waste modified by a modifier; the modifier preferably comprises one or both of stearic acid and a silane coupling agent and an organic oligomer; the silane coupling agent is preferably gamma-aminopropyltriethoxysilane and/or gamma-glycidoxypropyltrimethoxysilane; the organic oligomer is preferably polyethylene wax and/or oxidized polyethylene wax; the molecular weight of the organic oligomer is preferably 500-2000, and more preferably 800-1500; the mass of one or two of stearic acid and the silane coupling agent is preferably 0.5 to 2 percent of the mass of the solid waste, more preferably 0.5 to 1.5 percent, even more preferably 0.5 to 1 percent, and most preferably 0.5 percent; the mass of the organic oligomer is preferably 1 to 3 percent of the mass of the solid waste, and more preferably 1 to 2 percent; the solid waste comprises building waste residues, fly ash and crystal slag; the building waste slag is preferably one or more of waste concrete, waste clay sintered bricks, waste fly ash bricks, waste slag bricks, waste stone powder bricks and waste ceramics, and more preferably one or more of waste clay sintered bricks, waste fly ash bricks, waste slag bricks, waste stone powder bricks and waste ceramics and waste concrete; the mass ratio of one or more of the waste clay baked bricks, the waste fly ash bricks, the waste slag bricks, the waste stone powder bricks and the waste ceramics to the waste concrete is preferably (40-60): (60-40), more preferably (45-55): (55-45), and more preferably 50: 50; the microscopic morphology of the fly ash is preferably spherical common fly ash; the crystal slag comprises crystal glass, cerium oxide, calcium carbonate, quartz sand and the like, and the components of the crystal slag mainly comprise inorganic oxides or salts, so that the crystal slag is stable in chemical property, high-temperature resistant, and certain in hardness, and can be used for filling plastic products; the particle size D90 of the solid waste is preferably less than 80 μm; the water content is preferably 4% or less, more preferably 3% or less; the mass ratio of the building waste residue, the fly ash and the crystal waste residue is (25-35): (50-65): (10-20), preferably (25-35): (55-65): (10-15), more preferably (28-32): (55-62): (10-15), and more preferably 30: (55-60): (10-15).

The content of the stabilizer is preferably 2-8 parts by weight, more preferably 4-6 parts by weight, and still more preferably 5 parts by weight; the stabilizer is preferably a calcium zinc stabilizer.

The base material premix provided by the invention is added with the internal lubricant, the internal lubricant has good compatibility with the polymer, and the internal lubricant plays a role in reducing the cohesion among polymer molecules in the polymer, so that the internal frictional heat generation of a melt and the fluidity of the melt are improved. The content of the internal lubricant is preferably 0.5 to 2 parts by weight, more preferably 0.5 to 1.5 parts by weight, still more preferably 0.5 to 1 part by weight, and most preferably 0.8 part by weight; the type of the internal lubricant is preferably one or more of stearic acid, stearate, fatty acid ester and fatty alcohol; the stearate is preferably calcium stearate.

The base material premix provided by the invention is also added with an external lubricant to form a lubricating thin layer at the interface of the polyvinyl chloride and the modified mixture; the content of the external lubricant is preferably 0.3 to 2 parts by weight, more preferably 0.3 to 1.5 parts by weight, still more preferably 0.3 to 1 part by weight, still more preferably 0.4 to 0.8 part by weight, and most preferably 0.1 part by weight; the type of the external lubricant is preferably one or more of polyethylene wax, paraffin wax, oxidized polyethylene wax and stearic acid; the molecular weight of the polyethylene wax is preferably 4000-5000.

The content of the toughening agent in the base material premix provided by the invention is preferably 2-8 parts by weight, more preferably 4-6 parts by weight, and further preferably 5 parts by weight; the type of the toughening agent is preferably an acrylate toughening agent.

The content of the reinforcing agent is preferably 2-4 parts by weight, and more preferably 2-3 parts by weight; the reinforcing agent is preferably chlorinated polyethylene.

The invention takes materials such as fly ash, construction waste, crystal slag and the like as fillers to prepare the multi-element solid waste environment-friendly base material, the prepared base material has improved strength and stable performance, the service life of the floor is greatly prolonged, the cost of raw materials can be greatly reduced, the waste utilization of resources can be realized, the environment is protected, and better social benefit, economic benefit and environmental benefit are achieved.

The invention also provides a preparation method of the multielement solid waste environment-friendly base material, which comprises the following steps: s1) carrying out hot mixing on the binder, the modified mixture, the stabilizer, the internal lubricant, the external lubricant, the toughening agent and the reinforcing agent, and then carrying out cold mixing to obtain a base material premix; s2) heating, blending and extruding the substrate premix to obtain the multi-element solid waste environment-friendly substrate.

The amounts and types of the binder, the modified mixture, the stabilizer, the internal lubricant, the external lubricant, the toughening agent and the reinforcing agent are the same as those described above, and are not described herein again.

In the present invention, the modified mix is preferably prepared according to the following method: mixing the solid waste with a modifier to obtain a modified mixture; the mixing is preferably carried out in a high speed mixer; the mixing speed is preferably 800-1200 r/min, more preferably 900-1100 r/min, and still more preferably 950-1000 r/min; the mixing temperature is preferably 80-100 ℃, and more preferably 90-95 ℃; the mixing time is preferably 10-60 min; because the modifier comprises one or two of stearic acid and a silane coupling agent and an organic oligomer, in the invention, the solid waste and one or two of stearic acid and a silane coupling agent are preferably heated, mixed and stirred for 5-20 min, more preferably 5-15 min, and further preferably 10min, and then the organic oligomer is added and continuously mixed for 5-40 min, more preferably continuously mixed for 10-40 min, further preferably continuously mixed for 20-35 min, and most preferably continuously mixed for 30 min.

The solid waste comprises building waste residues, fly ash and crystal slag; the particle size D90 of the solid waste is preferably less than 80 μm; the water content is preferably 4% or less, more preferably 3% or less; in the invention, preferably, the building waste residue is crushed and ground, and subjected to particle size separation and drying to obtain building waste residue powder; the particle size sorting is preferably that D90 is less than 80 μm; the drying temperature is preferably 100-150 ℃, and more preferably 120-130 ℃; drying preferably until the water content is less than or equal to 4%, more preferably until the water content is less than or equal to 3%; grinding the crystal slag, sorting the grain size, and drying to obtain crystal slag powder; the particle size sorting is preferably D90 less than 80 μm; the drying temperature is preferably 100-150 ℃, and more preferably 120-130 ℃; drying preferably until the water content is less than or equal to 4%, more preferably until the water content is less than or equal to 3%; sorting and drying the fly ash according to particle size to obtain dried fly ash; the particle size sorting is preferably that D90 is less than 80 μm; the drying temperature is preferably 100-150 ℃, and more preferably 120-130 ℃; drying preferably until the water content is less than or equal to 4%, more preferably until the water content is less than or equal to 3%; and mixing the dried building waste residue powder, the fly ash and the crystal slag powder to obtain the solid waste.

The binder, the modified mixture, the stabilizer, the internal lubricant, the external lubricant, the toughening agent and the reinforcing agent are firstly subjected to hot mixing and then cold mixing to obtain a base material premix; the temperature of the hot mixing is preferably 100-140 ℃, more preferably 110-130 ℃, and further preferably 120 ℃; the time of the hot mixing is preferably 10-20 min, and more preferably 15 min; the cold mixing temperature is preferably 40-60 ℃, more preferably 45-55 ℃, and further preferably 50 ℃; the cold mixing time is preferably 5-15 min, more preferably 8-12 min, and still more preferably 10 min.

Heating, blending and extruding the substrate premix, wherein the heating, blending and extruding are preferably carried out in a screw extruder; the temperature for heating, blending and extruding is preferably 160 ℃ to 200 ℃, more preferably 170 ℃ to 190 ℃, still more preferably 175 ℃ to 185 ℃, and most preferably 180 ℃.

Heating, blending and extruding, and preferably performing room-temperature curing to obtain a multi-element solid waste environment-friendly base material; the room-temperature curing time is preferably 40-60 h, more preferably 45-55 h, still more preferably 45-50 h, and most preferably 48 h. The stress can be released by room temperature curing, so that the performance of the multielement solid waste environment-friendly base material is stable.

In order to further illustrate the present invention, the following describes a multi-component solid waste environment-friendly substrate and a preparation method thereof in detail with reference to the following examples.

The reagents used in the following examples are all commercially available; the polyvinyl chloride used in the examples and comparative examples was SG-5 type PVC.

Example 1

Pretreatment: crushing and grinding the building waste residues (50 percent of waste concrete blocks and 50 percent of waste concrete); grinding and drying the crystal slag; and then sorting the building waste residue, the fly ash and the crystal slag according to the particle size, preferably selecting the powder with the particle size D90 of less than 80 mu m, and drying the powder in an electrothermal blowing drying oven at 120 ℃ until the water content is less than 3.0 percent to obtain the powder to be dried and subjected to surface activation.

Mixing 30 parts of treated building waste residue, 60 parts of fly ash and 10 parts of crystal slag powder at the stirring speed of 950r/min, adding 0.5% of Stearic Acid (SA) and heating and stirring at 95 ℃ for 10min, then adding 1% of PE wax (type: H100) to react for 30min, and carrying out surface coating treatment on powder particles to obtain the activated modified mixture which can be directly filled in plastics.

Adding 100 parts of polyvinyl chloride (5 type PVC), 250 parts of modified mixture, 5 parts of calcium-zinc stabilizer, 0.8 part of stearic acid (model: Indonesia 1801), 0.6 part of PE wax (model: H100), 5 parts of CPE (model: 135A) and 2 parts of ACR (ACR) (model: PA-21), firstly hot-mixing at 120 ℃ for 15min, and then cold-mixing at 50 ℃ for 10min in a cold mixer to obtain base material premix; heating and blending the base material mixture by a screw extruder, and extruding at 180 ℃ to obtain the multi-element solid waste base material with the required size. Curing for 48 hours at room temperature, and releasing stress to ensure that the performance of the product is stable.

Example 2

Mixing 30 parts of treated building waste residue, 55 parts of fly ash and 15 parts of crystal slag powder at the stirring speed of 950r/min, adding 0.5% of Stearic Acid (SA), heating and stirring at 95 ℃ for 10min, adding 1% of PE wax (type: H100), reacting for 30min, and performing surface coating treatment on powder particles to obtain an activated modified mixture which can be directly filled in plastics.

Example 3

Adding 100 parts of polyvinyl chloride (5 type PVC), 200 parts of modified mixture, 5 parts of calcium-zinc stabilizer, 0.8 part of stearic acid (model: Indonesia 1801), 0.6 part of PE wax (model: H100), 5 parts of CPE (model: 135A) and 2 parts of ACR (ACR) (model: PA-21), firstly hot-mixing at 120 ℃ for 15min, and then cold-mixing at 50 ℃ for 10min in a cold mixer to obtain base material premix; heating and blending the base material mixture by a screw extruder, and extruding at 180 ℃ to obtain the multi-element solid waste base material with the required size. Curing for 48 hours at room temperature, and releasing stress to ensure that the performance of the product is stable.

Comparative example 1

Pretreatment: crushing and grinding the building waste residues (50 percent of waste concrete blocks and 50 percent of waste concrete); grinding and drying the crystal slag; then sorting the building waste residue, the fly ash and the crystal slag according to the particle size, preferably selecting the powder with the particle size D90 being less than 80 mu m, and drying the powder in an electrothermal blowing drying oven at 120 ℃ until the water content is less than 3.0%. And mixing 30 parts of treated building waste residues, 60 parts of fly ash and 10 parts of crystal slag powder to obtain a mixture.

Adding 100 parts of polyvinyl chloride (5 type PVC), 250 parts of a mixture, 5 parts of a calcium-zinc stabilizer, 0.8 part of stearic acid (type: Indonesia 1801), 0.6 part of PE wax (type: H100), 5 parts of CPE (type: 135A) and 2 parts of ACR (type: PA-21), hot mixing at 120 ℃ for 15min, and then cold mixing at 50 ℃ in a cold mixer for 10min to obtain a base material premix; heating and blending the base material mixture by a screw extruder, and extruding at 180 ℃ to obtain the multi-element solid waste base material with the required size. Curing for 48 hours at room temperature, and releasing stress to ensure that the performance of the product is stable.

Comparative example 2

Pretreatment: crushing and grinding the building waste residues (50 percent of waste concrete blocks and 50 percent of waste concrete); then sorting the building waste residues in a particle size, preferably powder with the particle size D90 of less than 60 mu m, and drying the powder in an electrothermal blowing dry box at 120 ℃ with the preferred water content of less than 2.0 percent to obtain the dry powder to be surface activated.

Adding 0.5% of Stearic Acid (SA) into 100 parts of treated building waste residues under the condition of stirring speed of 950r/min, heating and stirring for 10min at 95 ℃, adding 1% of PE wax (type: H100), reacting for 30min, and performing surface coating treatment on powder particles to obtain the activated modified mixture which can be directly filled in plastics.

Adding 100 parts of polyvinyl chloride (5 type PVC), 250 parts of modified mixture, 5 parts of calcium-zinc stabilizer, 0.8 part of stearic acid (model: Indonesia 1801), 0.6 part of PE wax (model: H100), 5 parts of CPE (model: 135A) and 2 parts of ACR (model: PA-21), firstly hot-mixing at 120 ℃ for 15min, and then cold-mixing in a cold mixer at 50 ℃ for 10min to obtain substrate premix; heating and blending the base material mixture by a screw extruder, and extruding at 180 ℃ to obtain the multi-element solid waste base material with the required size. Curing for 48 hours at room temperature, and releasing stress to ensure that the performance of the product is stable.

Comparative example 3

Pretreatment: sorting the fly ash by particle size, preferably selecting powder with the particle size D90 of less than 60 μm, and drying the powder in an electrothermal blowing dry box at 120 ℃ with the preferred water content of less than 2.0 percent to obtain the powder to be subjected to surface activation.

Adding 0.5% Stearic Acid (SA) into 100 parts of treated fly ash under the condition of stirring speed of 950r/min, heating and stirring for 10min at 95 ℃, adding 1% PE wax (type: H100), reacting for 30min, and performing surface coating treatment on powder particles to obtain the activated modified mixture which can be directly filled in plastics.

Comparative example 4

Pretreatment: crushing and grinding the building waste residues (50 percent of waste concrete blocks and 50 percent of waste concrete); grinding and drying the crystal slag; then sorting the building waste residues and the crystal slag by particle size, preferably selecting powder with the particle size D90 of less than 60 mu m, and drying the powder in an electrothermal blowing dry box at 120 ℃ until the preferred water content is less than 2.0 percent to obtain the powder to be dried and activated on the surface.

Mixing 90 parts of treated building waste residues and 10 parts of crystal slag powder at the stirring speed of 950r/min, adding 0.5% of Stearic Acid (SA), heating and stirring at 95 ℃ for 10min, adding 1% of PE wax (type: H100), reacting for 30min, and performing surface coating treatment on powder particles to obtain the activated modified mixture which can be directly filled in plastics.

Comparative example 5

Pretreatment: crushing and grinding the building waste residues (waste concrete blocks and waste concrete with the ratio of 1: 1); grinding and drying the crystal slag; and then sorting the building waste residue, the fly ash and the crystal slag according to the particle size, preferably selecting the powder with the particle size D90 of less than 80 mu m, and drying the powder in an electrothermal blowing drying oven at 120 ℃ until the water content is less than 3.0 percent to obtain the powder to be dried and subjected to surface activation.

Mixing 50 parts of treated building waste residue, 40 parts of fly ash and 10 parts of crystal slag powder at the stirring speed of 950r/min, adding 0.5% of SA (SA) at 95 ℃, heating and stirring for 10min, adding 1% of PE (polyethylene) wax (type: H100), reacting for 30min, and performing surface coating treatment on powder particles to obtain the activated modified mixture which can be directly filled in plastics.

Adding 100 parts of polyvinyl chloride (5 type PVC), 250 parts of modified mixture, 5 parts of calcium-zinc stabilizer, 0.8 part of stearic acid (model: Indonesia 1801), 0.6 part of PE wax (model: H100), 5 parts of CPE (model: 135A) and 2 parts of ACR (model: PA-21), hot-mixing for 15min at 120 ℃, and then cold-mixing for 10min at 50 ℃ in a cold mixer to obtain base material premix; heating and blending the base material mixture by a screw extruder, and extruding at 180 ℃ to obtain the multi-element solid waste base material with the required size. Curing for 48 hours at room temperature, and releasing stress to ensure stable performance.

The performance of the multi-element solid waste base material after room temperature curing obtained in the examples and comparative examples 1-5 was tested, and the test results are shown in table 1. The detection method comprises the following steps:

bending strength: the bending test speed of the plastic bending property test method (GB/T9341-2008) is as follows: 2 mm/min;

tensile strength: see ASTM D-638 Standard and GB1040.2-2006 section 2 for determination of tensile Properties of plastics: test conditions for molded and extruded plastics ", where the tensile test rates are: 5 mm/min;

impact strength: determination of plastic cantilever beam impact Strength (GB/T1843-2008);

water absorption: ASTM D570-98(2010) e1, section 7.1;

the combustion performance is as follows: grading of combustion performance of building materials and products (GB 8624 and 2012);

content of formaldehyde: limit of formaldehyde emission in artificial boards and products thereof for interior decoration and finishing materials (GB 18580-2017).

TABLE 1 Performance results for multi-component solid waste substrates after incubation at room temperature

Claims

1. The multi-element solid waste environment-friendly base material is characterized by being formed by base material premix; the base material premix comprises:

the modified mixture is solid waste modified by a modifier;

the solid waste comprises building waste residues, fly ash and crystal slag;

2. The multi-element solid waste environment-friendly base material according to claim 1, wherein the construction waste residue is selected from one or more of waste concrete, waste clay baked bricks, waste fly ash bricks, waste slag bricks, waste stone dust bricks and waste ceramics;

3. The multi-element solid waste environment-friendly base material as claimed in claim 1, wherein the mass of one or two of stearic acid and silane coupling agent is 0.5-2% of that of solid waste; the mass of the organic oligomer is 1-3% of the mass of the solid waste.

4. The multi-element solid waste environment-friendly substrate as claimed in claim 1, wherein the particle size D90 of the solid waste is less than 80 μm; the water content is not more than 4%.

5. The multi-element solid waste environment-friendly substrate according to claim 1, wherein the binder is selected from one or more of polyvinyl chloride, polypropylene and rubber;

the stabilizer is selected from calcium zinc stabilizers;

the toughening agent is selected from acrylate toughening agents;

the reinforcing agent is selected from chlorinated polyethylene.

6. The method for preparing the multi-element solid waste environment-friendly base material as claimed in claim 1, which comprises the following steps:

7. The preparation method according to claim 6, wherein the modified mixture is prepared according to the following method:

mixing the solid waste with a modifier to obtain a modified mixture;

the mixing temperature is 80-100 ℃;

the mixing time is 10-60 min.

8. The method according to claim 6, wherein the temperature of the hot mixing in the step S1) is 100 to 140 ℃; the hot mixing time is 10-20 min; the temperature of cold mixing is 40-60 ℃; the cold mixing time is 5-15 min;

9. The preparation method according to claim 6, wherein the multi-element solid waste environment-friendly base material is obtained by heating, blending and extruding in the step S2) and then curing at room temperature; the room-temperature curing time is 40-60 h.

10. The use of the multi-component solid waste environment-friendly substrate as defined in any one of claims 1 to 5 or the multi-component solid waste environment-friendly substrate prepared by the preparation method as defined in any one of claims 6 to 9 as a floor substrate.