CN115010459A - Roof building material based on waste circuit board resin powder and preparation method thereof - Google Patents
Roof building material based on waste circuit board resin powder and preparation method thereof Download PDFInfo
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- CN115010459A CN115010459A CN202210638003.2A CN202210638003A CN115010459A CN 115010459 A CN115010459 A CN 115010459A CN 202210638003 A CN202210638003 A CN 202210638003A CN 115010459 A CN115010459 A CN 115010459A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/42—Glass
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/20—Waste materials; Refuse organic from macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
- C04B22/066—Magnesia; Magnesium hydroxide
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/12—Acids or salts thereof containing halogen in the anion
- C04B22/124—Chlorides of ammonium or of the alkali or alkaline earth metals, e.g. calcium chloride
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/147—Alkali-metal sulfates; Ammonium sulfate
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
- E04D13/16—Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof insulating material or its integration in the roof structure
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention belongs to the technical field of building materials, and particularly relates to a roof building material based on waste circuit board resin powder and a preparation method thereof. The preparation raw materials of the roof building material comprise waste circuit board resin powder, a cosolvent, aggregate and a reinforcing agent; wherein: the cosolvent is a composite water-soluble sodium salt; the aggregate comprises magnesium oxide and stone powder; the reinforcing agent comprises PET cloth and glass fiber. The invention can greatly consume the nano waste circuit board resin powder and realize the resource utilization of the waste circuit board resin powder. Meanwhile, the raw materials interact with each other to realize good mechanical property, the transverse rupture strength of the product can reach 3780-3920N/m, and the longitudinal rupture strength of the product can reach 350-375N/m; the fireproof heat-insulating coating has good fireproof and heat-insulating effects, can reduce the construction of a fireproof heat-insulating layer, and realizes the heat conductivity coefficient of the product to be 0.775-0.845W/mK; the fire rating is class A.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a roof building material based on waste circuit board resin powder and a preparation method thereof.
Background
Printed Circuit Boards (PCBs for short) are thermosetting composite materials and are widely used as core components of electronic products in various industrial fields such as electronic information and machinery. With the development of science and technology and the progress of society, the updating frequency of electronic products is accelerated, so that the elimination rate of the electronic products is increased rapidly, and the waste amount of PCBs is increased indirectly. According to the report of '2020 world electronic waste monitoring' issued by the united nations, the total amount of electronic waste (waste products with batteries or plugs) generated in 2019 in the world reaches 5360 ten thousand tons, and the increase is 21% in only 5 years. Reports predict that by 2030, the global generation of electronic waste will reach 7400 ten thousand tons. It has been investigated that about two tons of carbon dioxide emissions can be avoided for every ton of waste electronic and electrical equipment recovered.
Waste Circuit Boards (WPCB) come from Waste leftover materials, defective products and disassembly of scrapped electronic products in the production process, and mainly comprise 30% of rare and precious metals (Ag, Cu and the like) and 70% of non-metal components composed of glass fibers, epoxy resin, flame retardants and the like. After valuable metals are recovered from the waste circuit board, the residual components are resin powder components of the waste circuit board, and the components have a large amount of persistent toxic substances and mainly relate to heavy metals and halogen flame retardants. It is well established in the national records of hazardous waste (2021 edition) that WPCBs (including those with or without components removed) and waste resin powders generated during disposal are hazardous wastes. In the WPCBs utilization and disposal process, heavy metals, organic pollutants (such as dioxin) and byproducts are gradually released into the environment through waste gas, waste liquid and waste residues, so that great environmental health risks are generated to ecology and residents. Therefore, how to scientifically treat and recycle the waste circuit boards has become an extremely important issue.
The application of WPCBs in the field of building materials is a lot of research work done by scholars at home and abroad. And the Tian S and the like (2019) take the WPCBs resin powder as a reinforcing agent, the polypropylene-plastic-wood composite material is prepared by filling modified polypropylene, and the thermal oxidation resistance and photolysis performance of the plastic-wood composite material can be improved by detecting the addition of the WPCBs resin powder. Wang R et al (2012) research shows that the WPCBs powder is doped in cement mortar to improve the water retention rate of the mortar, but the WPCBs powder can cause the increase of the gas content and reduce the compressive strength and the elastic strength of the mortar; the silane coupling agent can solve the problem of high gas content, and the styrene-butadiene emulsion can improve the compression resistance of the mortar.
Therefore, how to reasonably utilize WPCBs, reduce the treatment amount of the WPCBs, realize resource recycling, protect the environment and have important economic and social meanings.
Disclosure of Invention
The invention provides a roof building material based on waste circuit board resin powder and a preparation method thereof, aiming at the problems that the waste circuit board resin powder has large yield and high harmfulness, belongs to dangerous waste and needs to be reasonably and properly treated.
To overcome the above technical problems, a first aspect of the present invention provides a roofing building material.
The preparation raw materials of the roof building material comprise waste circuit board resin powder, cosolvent, aggregate and reinforcing agent;
the cosolvent is a composite water-soluble sodium salt;
the aggregate comprises magnesium oxide and stone powder;
the reinforcing agent comprises PET cloth and glass fiber.
The invention takes waste circuit board resin powder as a main raw material, the composite water-soluble sodium salt is added to play a role in dissolving aid, the magnesium oxide and the stone powder are used as aggregates, the PET cloth and the glass fiber are used as reinforcing agents, and the raw materials interact with each other to form a rich network structure, so that the self-bonding of the product can be realized, and the mechanical strength and the impact resistance of the product can be improved. Meanwhile, the main component of the waste circuit board resin powder is brominated epoxy resin, so that the waste circuit board resin powder has good flame retardant property; the magnesium oxide has higher melting point and boiling point, can be converted into a crystal shape after high-temperature combustion, has excellent fireproof and heat-insulating properties, and has good fireproof and heat-insulating effects under the combined action of the waste circuit board resin powder and the magnesium oxide, so that the construction of a fireproof heat-insulating layer of a common roof building material can be reduced, and the overall load of a building steel frame can be reduced. In addition, the waste circuit board resin powder also has good adhesive property, and can be used as an adhesive together with water-soluble sodium salt, so that the product has self-adhesive property, and the product strength is favorably improved.
As a further improvement of the scheme, the preparation raw materials comprise the following components in parts by weight: 20-40 parts of waste circuit board resin powder, 14-20 parts of cosolvent, 23-45 parts of aggregate and 2-5 parts of reinforcing agent.
Specifically, the optimal proportioning relationship among the waste circuit board resin powder, the cosolvent, the aggregate and the reinforcing agent is controlled, and the raw materials are synergistic, so that the doping amount of the waste circuit board resin powder is increased on the premise that the prepared roof building material has good fireproof heat preservation and mechanical properties, and the roof building material which is not in the formula range cannot simultaneously meet the optimization of the comprehensive performance of the product.
As a further improvement of the above, the co-solvent comprises sodium sulfate, sodium chloride and water glass.
Preferably, the cosolvent comprises the following components in parts by weight: 3-5 parts of sodium sulfate, 3-5 parts of sodium chloride and 8-10 parts of water glass.
Specifically, the invention selects specific water-soluble sodium salt sodium sulfate, sodium chloride and water glass as cosolvents, and controls the optimal dosage relation among the sodium salts, thereby being beneficial to improving the bonding strength of the product.
As a further improvement of the above scheme, the aggregate comprises, in parts by weight: 20-35 parts of magnesium oxide and 3-10 parts of stone powder.
Specifically, the magnesium oxide and the stone powder which are used as inorganic high-temperature-resistant raw materials can be used as a framework of a product network structure, so that the mechanical property of the product is improved, and meanwhile, the fireproof heat-insulation effect is good.
As a further improvement of the scheme, the mass ratio of the PET cloth to the glass fiber is (1.5-2.5): (0.5-2.5).
Specifically, the PET cloth and the glass fiber are used as composite reinforcing agents, and the woven physical structure of the PET cloth is fully utilized, so that the PET cloth is tightly combined with other raw materials under the bonding effect of waste circuit board resin powder; meanwhile, the glass fiber can effectively bear the load transfer of the matrix material, and the strength and the toughness of the product are effectively improved in the modes of pulling out, crack deflection and the like; by controlling the specific mass ratio of the PET cloth to the glass fiber, the optimization of the mechanical property of the product can be realized.
In a second aspect of the invention, a method of making a roofing building material is provided.
Specifically, the preparation method of the roofing building material is used for preparing the roofing building material, and comprises the following steps:
(1) dissolving the cosolvent to obtain a mixed solution;
(2) adding waste circuit board resin powder and aggregate into the mixed solution prepared in the step (1) and stirring to obtain a premixed material;
(3) and (3) adding a reinforcing agent into the premixed material prepared in the step (2), and performing compression molding to obtain the roof building material.
As a further improvement of the above scheme, in the step (1), the cosolvent is dissolved in water, and the mass ratio of the cosolvent to the water is (14-20): (5-20).
As a further improvement of the above scheme, in the step (3), a step of curing is further included after the press molding.
Preferably, the curing process comprises the following steps: curing for 28 days under the standard curing conditions that the temperature is (20 +/-2) DEG C and the relative humidity is more than 95 percent.
In a third aspect of the invention, there is provided a use of a roofing building material.
In particular to application of the roofing building material in the field of buildings.
Preferably, the roofing building material is applied to roofing building tiles.
Compared with the prior art, the technical scheme of the invention at least has the following technical effects or advantages:
(1) the waste circuit board resin powder has high adding amount, can greatly consume the nano waste circuit board resin powder, and realizes the resource utilization of the waste circuit board resin powder.
(2) The invention also adds water-soluble sodium salt to play a role in dissolving aid, magnesium oxide and stone powder are used as aggregates, PET cloth and glass fiber are used as reinforcing agents, and the raw materials interact with each other to form a rich network structure, so that the self-bonding of the product can be realized, and the mechanical strength and the impact resistance of the product can be improved. The transverse rupture strength of the product can reach 3780-3920N/m, and the longitudinal rupture strength can reach 350-375N/m.
(3) The main component of the waste circuit board resin powder adopted by the invention is brominated epoxy resin, and the brominated epoxy resin has good flame retardant property; the magnesium oxide has higher melting point and boiling point, can be converted into a crystal shape after high-temperature combustion, has excellent fireproof and heat-insulating properties, and has good fireproof and heat-insulating effects under the combined action of the waste circuit board resin powder and the magnesium oxide, so that the construction of a fireproof heat-insulating layer of a common roof building material can be reduced, and the overall load of a building steel frame can be reduced. The heat conductivity coefficient of the product is 0.775-0.845W/mK; the fire rating is class A.
Detailed Description
The present invention is specifically described below with reference to examples in order to facilitate understanding of the present invention by those skilled in the art. It should be particularly noted that the examples are given solely for the purpose of illustration and are not to be construed as limitations on the scope of the invention, as non-essential improvements and modifications to the invention may occur to those skilled in the art, which fall within the scope of the invention as defined by the appended claims. Meanwhile, the raw materials mentioned below are not specified in detail and are all commercial products; the process steps or preparation methods not mentioned in detail are all process steps or preparation methods known to the person skilled in the art.
Example 1
A roof building material comprises, by weight, 25 parts of waste circuit board resin powder (sieved by a 100-mesh sieve), 5 parts of sodium sulfate, 5 parts of sodium chloride, 10 parts of water glass, 35 parts of magnesium oxide, 10 parts of stone powder, 2.5 parts of PET cloth and 2.5 parts of glass fiber.
A preparation method of a roofing building material comprises the following steps:
(1) fully dissolving a cosolvent (water glass, sodium sulfate and sodium chloride) by using pure water, wherein the mass ratio of the cosolvent to the pure water is 3:1, and preparing a mixed solution;
(2) weighing magnesium oxide, waste circuit board resin powder, stone powder, sodium sulfate, sodium chloride and magnesium oxide according to the mass ratio, putting the magnesium oxide, the waste circuit board resin powder, the stone powder, the sodium sulfate, the sodium chloride and the magnesium oxide into a stirrer, adding the mixed solution prepared in the step (1), and stirring for 30 minutes to obtain a premixed material;
(3) adding a reinforcing agent into the premixed material prepared in the step (2), conveying the premixed material to a coil press through a conveying belt for press forming, curing for 28 days under the standard curing conditions that the temperature is (20 +/-2) DEG C and the relative humidity is higher than 95%, and then demoulding and shearing to obtain the roof building tile of the embodiment.
Example 2
A roof building material comprises, by weight, 30 parts of waste circuit board resin powder (sieved by a 100-mesh sieve), 4 parts of sodium sulfate, 5 parts of sodium chloride, 8 parts of water glass, 30 parts of magnesium oxide, 8 parts of stone powder, 3 parts of PET cloth and 1 part of glass fiber.
A preparation method of a roofing building material comprises the following steps:
(1) fully dissolving a cosolvent (water glass, sodium sulfate and sodium chloride) by pure water, wherein the mass ratio of the cosolvent to the pure water is 2:1, and preparing a mixed solution;
(2) weighing magnesium oxide, waste circuit board resin powder, stone powder, sodium sulfate, sodium chloride and magnesium oxide according to the mass ratio, putting the magnesium oxide, the waste circuit board resin powder, the stone powder, the sodium sulfate, the sodium chloride and the magnesium oxide into a stirrer, adding the mixed solution prepared in the step (1), and stirring for 30 minutes to obtain a premixed material;
(3) adding a reinforcing agent into the premixed material prepared in the step (2), conveying the premixed material to a coil press through a conveying belt for press forming, curing for 28 days under the standard curing conditions that the temperature is (20 +/-2) DEG C and the relative humidity is higher than 95%, and then demoulding and shearing to obtain the roof building tile of the embodiment.
Example 3
A roof building material comprises, by weight, 35 parts of waste circuit board resin powder (screened by a 100-mesh sieve), 5 parts of sodium sulfate, 4 parts of sodium chloride, 8 parts of water glass, 25 parts of magnesium oxide, 10 parts of stone powder, 2.5 parts of PET cloth and 1 part of glass fiber.
A preparation method of a roofing building material comprises the following steps:
(1) fully dissolving a cosolvent (water glass, sodium sulfate and sodium chloride) by pure water, wherein the mass ratio of the cosolvent to the pure water is 1:1, and preparing a mixed solution;
(2) weighing magnesium oxide, waste circuit board resin powder, stone powder, sodium sulfate, sodium chloride and magnesium oxide according to the mass ratio, putting the magnesium oxide, the waste circuit board resin powder, the stone powder, the sodium sulfate, the sodium chloride and the magnesium oxide into a stirrer, adding the mixed solution prepared in the step (1), and stirring for 30 minutes to obtain a premixed material;
(3) adding a reinforcing agent into the premixed material prepared in the step (2), conveying the premixed material to a coil press through a conveying belt for press forming, curing for 28 days under the standard curing conditions that the temperature is (20 +/-2) DEG C and the relative humidity is higher than 95%, and then demoulding and shearing to obtain the roof building tile of the embodiment.
Example 4
A roof building material comprises, by weight, 40 parts of waste circuit board resin powder (screened by a 100-mesh sieve), 3 parts of sodium sulfate, 4 parts of sodium chloride, 10 parts of water glass, 35 parts of magnesium oxide, 3 parts of stone powder, 2.5 parts of PET cloth and 2.5 parts of glass fiber.
A preparation method of a roofing building material comprises the following steps:
(1) fully dissolving a cosolvent (water glass, sodium sulfate and sodium chloride) by pure water, wherein the mass ratio of the cosolvent to the pure water is 3:1, and preparing a mixed solution;
(2) weighing magnesium oxide, waste circuit board resin powder, stone powder, sodium sulfate, sodium chloride and magnesium oxide according to the mass ratio, putting the magnesium oxide, the waste circuit board resin powder, the stone powder, the sodium sulfate, the sodium chloride and the magnesium oxide into a stirrer, adding the mixed solution prepared in the step (1), and stirring for 30 minutes to obtain a premixed material;
(3) adding a reinforcing agent into the premixed material prepared in the step (2), conveying the premixed material to a coil press through a conveying belt for press forming, curing for 28 days under the standard curing conditions that the temperature is (20 +/-2) DEG C and the relative humidity is higher than 95%, and then demoulding and shearing to obtain the roof building tile of the embodiment.
Comparative example 1
Comparative example 1 differs from example 1 only in that: in comparative example 1, no waste wiring board resin powder was added, and the kind and amount of other raw materials and the method for producing the roofing building material were the same as those in example 1.
Comparative example 2
Comparative example 2 differs from example 1 only in that: the cosolvent added in the comparative example 2 is single sodium chloride, the dosage of the cosolvent is 20 parts, and the types and the addition amounts of other raw materials and the preparation method of the roofing building material are the same as those in the example 1.
Comparative example 3
Comparative example 3 differs from example 1 only in that: the cosolvent added in the comparative example 3 is sodium sulfate only, the dosage of the cosolvent is 20 parts, and the types and the addition amounts of other raw materials and the preparation method of the roofing building material are the same as those in the example 1.
Comparative example 4
Comparative example 4 differs from example 1 only in that: the cosolvent added in the comparative example 4 is single water glass, the dosage of the cosolvent is 20 parts, and the types and the addition amounts of other raw materials and the preparation method of the roofing building material are the same as those in the example 1.
Comparative example 5
Commercially available cement tiles.
Performance testing
The roofing building tiles of examples 1-4 and comparative examples 1-5 were subjected to mechanical, fire and thermal insulation tests, in which: the mechanical property detection tests the transverse rupture resistance and the longitudinal rupture resistance according to GB/T7019-; the heat conductivity coefficient is tested by a heat conductivity coefficient tester; the fire resistance test is carried out according to GB8624-2012 'fire resistance rating of building materials and products', and the specific test result is shown in Table 1.
Table 1: comparative table of product performance test results of each example and comparative example
As can be seen from Table 1: the products prepared in the embodiments 1-4 have good mechanical property and thermal insulation performance, the transverse rupture strength can reach 3780-. In comparative examples 1 to 4, no waste circuit board resin powder was added or a single cosolvent was used, and the mechanical properties and thermal insulation properties of the samples prepared were inferior to those of examples 1 to 4. Comparative example 5 is a general cement tile, which is inferior to examples 1 to 4 in mechanical properties, and is large in thermal conductivity and poor in heat insulation.
It will be obvious to those skilled in the art that many simple derivations or substitutions can be made without inventive effort without departing from the inventive concept. Therefore, simple modifications to the present invention by those skilled in the art according to the present disclosure should be within the scope of the present invention. The above embodiments are preferred embodiments of the present invention, and all similar processes and equivalent variations to those of the present invention should fall within the scope of the present invention.
Claims (10)
1. The roofing building material is characterized in that the preparation raw materials of the roofing building material comprise waste circuit board resin powder, cosolvent, aggregate and reinforcing agent;
the cosolvent is a composite water-soluble sodium salt;
the aggregate comprises magnesium oxide and stone powder;
the reinforcing agent comprises PET cloth and glass fiber.
2. The roofing building material of claim 1, wherein the preparation raw materials comprise, in parts by weight: 20-40 parts of waste circuit board resin powder, 14-20 parts of cosolvent, 23-45 parts of aggregate and 2-5 parts of reinforcing agent.
3. The roofing building material of claim 2 wherein said co-solvents include sodium sulfate, sodium chloride and water glass.
4. The roofing building material of claim 3, wherein the co-solvent comprises, in parts by weight: 3-5 parts of sodium sulfate, 3-5 parts of sodium chloride and 8-10 parts of water glass.
5. The roofing building material of claim 2, wherein the aggregate comprises, in parts by weight: 20-35 parts of magnesium oxide and 3-10 parts of stone powder.
6. The roofing building material of claim 1, wherein the mass ratio of the PET cloth to the glass fibers is (1.5-2.5): (0.5-2.5).
7. A method of preparing a roofing building material, wherein the method of preparation is used to prepare a roofing building material according to any one of claims 1 to 6, comprising the steps of:
(1) dissolving the cosolvent to obtain a mixed solution;
(2) adding waste circuit board resin powder and aggregate into the mixed solution prepared in the step (1) and stirring to obtain a premixed material;
(3) and (3) adding a reinforcing agent into the premixed material prepared in the step (2), and performing compression molding to obtain the roof building material.
8. The preparation method of the roofing building material according to the claim 7, characterized in that, in the step (1), the cosolvent is dissolved in water, and the mass ratio of the cosolvent to the water is (14-20): (5-20).
9. The method for preparing a roofing building material according to claim 7, wherein in the step (3), the step of maintaining is further included after the press forming.
10. Use of the roofing building material according to any one of claims 1 to 6 in the construction field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210638003.2A CN115010459B (en) | 2022-06-07 | 2022-06-07 | Roof building material based on waste circuit board resin powder and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210638003.2A CN115010459B (en) | 2022-06-07 | 2022-06-07 | Roof building material based on waste circuit board resin powder and preparation method thereof |
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| CN115010459B CN115010459B (en) | 2023-04-11 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834100A (en) * | 2013-12-05 | 2014-06-04 | 江苏理工学院 | Reinforced resin-plastic compound plate prepared from waste printed circuit board (PCB) powder and preparation method thereof |
| CN104624611A (en) * | 2015-01-23 | 2015-05-20 | 长沙紫宸科技开发有限公司 | Energy-regeneration pollution-free disposal method for waste electrical appliance circuit board |
| CN107226645A (en) * | 2017-06-05 | 2017-10-03 | 昆山新世绿环保科技有限公司 | The assembling building wall board and its production method of a kind of utilization PCB resin fibres powder filling |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834100A (en) * | 2013-12-05 | 2014-06-04 | 江苏理工学院 | Reinforced resin-plastic compound plate prepared from waste printed circuit board (PCB) powder and preparation method thereof |
| CN104624611A (en) * | 2015-01-23 | 2015-05-20 | 长沙紫宸科技开发有限公司 | Energy-regeneration pollution-free disposal method for waste electrical appliance circuit board |
| CN107226645A (en) * | 2017-06-05 | 2017-10-03 | 昆山新世绿环保科技有限公司 | The assembling building wall board and its production method of a kind of utilization PCB resin fibres powder filling |
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