CN114014618A - Baking-free brick and preparation method thereof - Google Patents
Baking-free brick and preparation method thereof Download PDFInfo
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- CN114014618A CN114014618A CN202111194106.6A CN202111194106A CN114014618A CN 114014618 A CN114014618 A CN 114014618A CN 202111194106 A CN202111194106 A CN 202111194106A CN 114014618 A CN114014618 A CN 114014618A
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
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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
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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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
- C04B18/16—Waste materials; Refuse from building or ceramic industry
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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
- 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
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- Organic Chemistry (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a baking-free brick which comprises the following raw materials in parts by weight: 30-45 parts of waste asphalt concrete, 10-15 parts of regenerated glass fiber reinforced plastic, 15-20 parts of fly ash and 15-20 parts of lime powder, wherein the baking-free brick is prepared by taking the waste asphalt concrete and the regenerated glass fiber reinforced plastic as main materials, taking the fly ash and the lime powder as auxiliary materials, adding 15-20 parts of water, stirring, mixing, press-forming and steam curing. The preparation method comprises the following steps: crushing and sieving the waste asphalt concrete; cutting and crushing the glass fiber reinforced plastic plate-shaped waste to obtain glass fiber reinforced plastic regenerated powder and glass fiber reinforced plastic regenerated fibers; adding water into the treated waste asphalt concrete, the treated regenerated glass fiber reinforced plastic, the fly ash and the lime powder according to the proportion, stirring, and uniformly mixing to obtain a mixture; weighing the mixture and pressing into green bricks; and (5) steaming and curing the prepared green bricks, and cooling to obtain the baking-free bricks. The baking-free brick prepared by the invention has a more compact structure, and the average compressive strength and the breaking strength are further improved.
Description
Technical Field
The invention relates to the technical field of comprehensive utilization of construction waste resources and novel building materials, in particular to a baking-free brick and a preparation method thereof.
Background
In recent decades, the foundation construction of China has been developed rapidly, and the proportion of asphalt concrete pavements in high-grade pavements of some highways is up to more than 80%. According to the standard design requirements of the road surfaces in China, the design service life of the asphalt road surfaces is generally 10-15 years. However, due to the rapid increase of road traffic volume, the phenomena of heavy load and overload are severe, so that a plurality of asphalt pavements are actually in an overload working state, and the service life of the asphalt pavements is greatly reduced due to the influence of environmental factors such as rain, snow, sunshine and the like, and the common actual service life is within 10 years. Asphalt roads reaching the service life need to be renovated, a large amount of waste asphalt mixture is generated in the process, and if the waste asphalt mixture is piled up or buried, serious environmental pollution and huge resource waste are caused. Therefore, the research on comprehensive utilization and recovery of the waste asphalt concrete is of great significance.
The glass fiber reinforced plastic is a kind of composite material with fiber and its product as reinforcing material and synthetic resin as base material. Most of the glass fiber reinforced plastic reinforcing fibers are glass fibers, and the glass fiber reinforced plastic is called glass fiber reinforced composite plastic; the small part of the reinforcing fiber of the glass fiber reinforced plastic is carbon fiber and boron fiber which are respectively called carbon fiber reinforced composite plastic and boron fiber reinforced composite plastic. The service life of the glass fiber reinforced plastic product is about 15-20 years generally, and then the glass fiber reinforced plastic product becomes waste. The steel has the characteristics of high strength, stable property, corrosion resistance and the like, so that the recovery difficulty is high. The traditional treatment methods are mostly landfill and incineration, and the landfill treatment occupies a large amount of land and pollutes underground water; harmful gas is generated during incineration disposal, which not only pollutes the environment but also harms human health, and the treatment cost is high, the treatment capacity is limited, and the requirement of the sharp increase of the quantity of the glass fiber reinforced plastic wastes can not be met. Therefore, the reasonable disposal of the waste glass fiber reinforced plastics becomes a problem to be solved urgently in the glass fiber reinforced plastics industry of China at present.
Chinese patent document CN107021709A (application number: 201710410557.6) discloses a permeable pavement brick for recycling asphalt and a preparation method thereof, which comprises the steps of crushing waste asphalt concrete, adding 4-6 parts of emulsified asphalt and 20-28 parts of 62.5-grade portland cement, and compacting and molding by a block molding machine. The added emulsified asphalt and 62.5-grade portland cement are high in price and relatively low in waste utilization rate; and the building block has low forming pressure, smaller compactness, easy loosening and small compressive strength. Therefore, there is a need for reasonable utilization of waste asphalt concrete and recycled glass fiber reinforced plastic.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a baking-free brick and a preparation method thereof.
The invention provides a baking-free brick and a preparation method thereof, which adopts the following technical scheme:
the baking-free brick is prepared from the following components in parts by mass: 30-45 parts of waste asphalt concrete, 10-15 parts of regenerated glass fiber reinforced plastic, 15-20 parts of fly ash and 15-20 parts of lime powder, wherein the baking-free brick is prepared by taking the waste asphalt concrete and the regenerated glass fiber reinforced plastic as main materials, taking the fly ash and the lime powder as auxiliary materials, adding 15-20 parts of water, stirring and mixing, performing compression molding under a preset pressure, and performing steam curing in steam at a preset temperature and a preset pressure for a preset time.
Preferably, 35-40 parts of waste asphalt concrete, 12-13 parts of regenerated glass fiber reinforced plastic, 17-18 parts of fly ash, 17-18 parts of lime powder and 15-20 parts of water.
Preferably, 37 parts of waste asphalt concrete, 13 parts of recycled glass fiber reinforced plastic, 17 parts of fly ash, 17 parts of lime powder and 16 parts of water.
Preferably, the predetermined pressure is 20N/mm2The preset temperature is 170-180 ℃, the preset pressure is 0.8-1.0 Mpa, and the preset time is 4-6 hours.
The preparation method of the baking-free brick comprises the following steps:
(1) crushing the waste asphalt concrete to destroy the cementation of asphalt among aggregates to form particles wrapping the asphalt outside the aggregates, and sieving to screen out particles meeting a preset particle size;
(2) cutting the waste of the glass fiber reinforced plastic plate into blocks, and then crushing the glass fiber reinforced plastic waste of the blocks by crushing equipment to obtain glass fiber reinforced plastic regenerated powder and glass fiber reinforced plastic regenerated fibers;
(3) adding water into the waste asphalt concrete which is processed in the step (1) and accords with the preset particle size, the glass fiber reinforced plastic regenerated fiber processed in the step (2), the fly ash and the lime powder according to the proportion, stirring and mixing the materials to obtain a mixture;
(4) weighing the mixture prepared in the step (3), conveying the mixture into a pressing mold, performing compression molding under the action of preset pressure, and pressing for preset time to prepare a green brick;
(5) and (4) drying the green bricks prepared in the step (4) after the green bricks are placed for a set time, then steaming the green bricks in steam with a preset temperature and a preset pressure for a preset time, and naturally cooling the dried green bricks to obtain the baking-free bricks.
By adopting the technical scheme, when the waste asphalt concrete is steamed and cured at high temperature, the asphalt is in a molten state, and when the waste asphalt concrete is cooled down subsequently, the regenerated glass fiber reinforced plastic fibers in contact with the waste asphalt concrete are bonded into 'wool spheres', the fly ash and the lime powder form calcium silicate hydrate solids when being steamed and cured at high temperature, and the glass fiber reinforced plastic fibers and the calcium silicate hydrate are tightly connected between the 'wool spheres' and the 'wool spheres', so that the prepared baking-free brick has a more compact structure, and the average compressive strength and the breaking strength are further improved; the addition of the waste asphalt concrete increases the breaking strength of the prepared baking-free brick to be larger than the compressive strength, and the breaking pressure of the baking-free brick is obviously improved compared with that of a common brick.
Preferably, the particle size of the waste asphalt concrete obtained after sieving in the step (1) is 3-5 mm.
Preferably, the recycled glass fiber reinforced plastic powder in the step (2) is in a fluffy and agglomerated state of a catkin shape and contains a large amount of synthetic resin dust; the glass fiber reinforced plastic regenerated fiber is in a cotton fluffy and conglobation state, and the length of the glass fiber reinforced plastic regenerated fiber is between 3mm and 15 mm.
Preferably, the material mixing in the step (3) comprises two processes, firstly, the glass fiber reinforced plastic regenerated powder and the glass fiber reinforced plastic regenerated fiber prepared in the step (2) are mixed with fly ash and lime powder before water is added, the mixing process is primary mixing, and the primary mixing time is 3-5 min; then adding the asphalt concrete particles prepared in the step (1) for secondary mixing, wherein the mixing time of the secondary mixing is 1-2 min; subsequently, water is added for mixing three times, and the added water comprises tap water.
Preferably, the pressing mold in the step (4) uses a brick press, and the predetermined pressure is 20N/mm2And the pressing time is 15-25 s.
Preferably, the set time in the step (5) is 2-4 hours, the preset temperature is 170-180 ℃, the preset pressure is 0.8-1.0 MPa, and the preset time is 4-6 hours.
In summary, the invention has the following beneficial technical effects:
1. the invention combines the actual conditions of large amount of waste asphalt concrete, high waste rate of glass fiber reinforced plastics and low utilization rate in China, fully utilizes the structure and chemical characteristics of the waste asphalt concrete and the regenerated glass fiber reinforced plastics to achieve the purposes of maximum utilization amount of the two wastes and cost saving, and through long-term research and test, the fly ash, the lime powder and the water are added on the basis of the two wastes, so that the average compression strength and the breaking strength of a green brick are improved, and the breaking ratio is also obviously improved.
2. The baking-free brick produced by the invention takes the waste asphalt concrete and the regenerated glass fiber reinforced plastic fiber as main materials, comprehensively utilizes the waste asphalt concrete, the glass fiber reinforced plastic and the like, has outstanding environmental benefit, low cost and obvious economic benefit, can completely realize industrial production, and simultaneously achieves the innovation of treating waste by waste.
3. The invention adopts the waste asphalt concrete and the regenerated glass fiber reinforced plastic as main raw materials to replace the prior proposal that a large amount of cement or fly ash is mixed, thus obviously reducing the production cost.
Drawings
FIG. 1 is a process flow diagram of a baking-free brick and a preparation method thereof.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Description of raw materials: the waste asphalt concrete used in the invention is obtained by planing and milling municipal road pavement; the glass fiber reinforced plastic waste is recycled by a waste recycling station; the fly ash is collected from waste gas of a coal-fired power plant; the lime powder is prepared by grinding lime blocks.
The embodiment of the invention discloses a baking-free brick and a preparation method thereof.
Example 1
Firstly, crushing waste asphalt concrete to destroy cementation of asphalt among aggregates to form a single-grain structure of the aggregate externally wrapped with the asphalt, then sieving, wherein the grain size of the waste asphalt concrete obtained after sieving is 3-5 mm; cutting the waste of the glass fiber reinforced plastic plate into small blocks, and then crushing the small blocks of the waste of the glass fiber reinforced plastic by crushing equipment to obtain glass fiber reinforced plastic regenerated powder and glass fiber reinforced plastic regenerated fibers, wherein the glass fiber reinforced plastic regenerated powder is in a willow-like fluffy aggregation state and contains a large amount of synthetic resin dust, and the glass fiber reinforced plastic regenerated fibers are in a cotton-like fluffy aggregation state and have the length of between 3 and 15 mm; respectively weighing 37 parts of sieved waste asphalt concrete, 13 parts of regenerated glass fiber reinforced plastic, 17 parts of fly ash and 17 parts of lime powder according to the proportion, then mixing the regenerated glass fiber reinforced plastic, the fly ash and the lime powder for 4min, then adding the waste asphalt concrete for secondary mixing for 2min, then adding 16 parts of tap water and stirring, mixing the materials, and uniformly mixing to obtain a mixture; conveying the mixture into a pressing die, and pressing at a brick press with the thickness of 20N/mm2The pressing and forming are carried out under the pressure action, the pressing time is 20s, and green bricks are prepared; and (3) placing the green bricks for 3h, drying, then steaming in steam at the temperature of 170 ℃ and under the pressure of 1.0MPa for 5h, and naturally cooling to obtain the baking-free bricks.
The performance of the baking-free brick is tested, and the average compressive strength and the average flexural strength of the baking-free brick prepared in the embodiment are 17.2Mpa and 4.9Mpa respectively.
Example 2
First abandonCrushing asphalt concrete, destroying bonding of asphalt among aggregates, forming a single-grain structure of the aggregate externally wrapped with the asphalt, then sieving, and obtaining the waste asphalt concrete with the grain size of 3-5 mm after sieving; cutting the waste of the glass fiber reinforced plastic plate into small blocks, and then crushing the small blocks of the waste of the glass fiber reinforced plastic by crushing equipment to obtain glass fiber reinforced plastic regenerated powder and glass fiber reinforced plastic regenerated fibers, wherein the glass fiber reinforced plastic regenerated powder is in a willow-like fluffy aggregation state and contains a large amount of synthetic resin dust, and the glass fiber reinforced plastic regenerated fibers are in a cotton-like fluffy aggregation state and have the length of between 3 and 15 mm; respectively weighing 30 parts of sieved waste asphalt concrete, 15 parts of regenerated glass fiber reinforced plastic, 15 parts of fly ash and 20 parts of lime powder according to the proportion, then mixing the regenerated glass fiber reinforced plastic, the fly ash and the lime powder for 3min, then adding the waste asphalt concrete for secondary mixing for 2min, then adding 20 parts of tap water and stirring, mixing the materials, and uniformly mixing to obtain a mixture; conveying the mixture into a pressing die, and pressing at a brick press with the thickness of 20N/mm2The pressing and forming are carried out under the pressure action, the pressing time is 20s, and green bricks are prepared; and (3) placing the green bricks for 2h, drying, then steaming in steam at the temperature of 170 ℃ and the pressure of 0.8MPa for 5h, and naturally cooling to obtain the baking-free bricks.
The performance of the baking-free brick is tested, and the average compressive strength and the average flexural strength of the baking-free brick prepared in the embodiment are respectively 13.5Mpa and 3.7 Mpa.
Example 3
Firstly, crushing waste asphalt concrete to destroy cementation of asphalt among aggregates to form a single-grain structure of the aggregate externally wrapped with the asphalt, then sieving, wherein the grain size of the waste asphalt concrete obtained after sieving is 3-5 mm; cutting the waste of the glass fiber reinforced plastic plate into small blocks, and then crushing the small blocks of the waste of the glass fiber reinforced plastic by crushing equipment to obtain glass fiber reinforced plastic regenerated powder and glass fiber reinforced plastic regenerated fibers, wherein the glass fiber reinforced plastic regenerated powder is in a willow-like fluffy aggregation state and contains a large amount of synthetic resin dust, and the glass fiber reinforced plastic regenerated fibers are in a cotton-like fluffy aggregation state and have the length of between 3 and 15 mm; respectively weighing 45 parts of sieved waste asphalt concrete and 10 parts of regenerated glass fiber reinforced plastic fiber according to the proportion20 parts of fly ash and 15 parts of lime powder, then mixing the regenerated glass fiber reinforced plastic, the fly ash and the lime powder for 5min, then adding the waste asphalt concrete for secondary mixing for 1min, then adding 10 parts of tap water and stirring, mixing the materials, and uniformly mixing to obtain a mixture; conveying the mixture into a pressing die, and pressing at a brick press with the thickness of 20N/mm2The pressing and forming are carried out under the pressure action, the pressing time is 15s, and green bricks are prepared; and (3) placing the green bricks for 4h, drying, then steaming in water vapor with the temperature of 180 ℃ and the pressure of 1.0MPa for 6h, and naturally cooling to obtain the baking-free bricks.
The performance of the baking-free brick is tested, and the average compressive strength and the average flexural strength of the baking-free brick prepared in the embodiment are 17.0Mpa and 4.2Mpa respectively.
Example 4
Firstly, crushing waste asphalt concrete to destroy cementation of asphalt among aggregates to form a single-grain structure of the aggregate externally wrapped with the asphalt, then sieving, wherein the grain size of the waste asphalt concrete obtained after sieving is 3-5 mm; cutting the waste of the glass fiber reinforced plastic plate into small blocks, and then crushing the small blocks of the waste of the glass fiber reinforced plastic by crushing equipment to obtain glass fiber reinforced plastic regenerated powder and glass fiber reinforced plastic regenerated fibers, wherein the glass fiber reinforced plastic regenerated powder is in a willow-like fluffy aggregation state and contains a large amount of synthetic resin dust, and the glass fiber reinforced plastic regenerated fibers are in a cotton-like fluffy aggregation state and have the length of between 3 and 15 mm; respectively weighing 35 parts of sieved waste asphalt concrete, 12 parts of regenerated glass fiber reinforced plastic, 17 parts of fly ash and 17 parts of lime powder according to the proportion, then mixing the regenerated glass fiber reinforced plastic, the fly ash and the lime powder for 4min, then adding the waste asphalt concrete for secondary mixing for 2min, then adding 19 parts of tap water and stirring, mixing the materials, and uniformly mixing to obtain a mixture; conveying the mixture into a pressing die, and pressing at a brick press with the thickness of 20N/mm2The pressing and forming are carried out under the pressure action, the pressing time is 25s, and green bricks are prepared; and (3) placing the green bricks for 3h, drying, then steaming in water vapor at the temperature of 180 ℃ and the pressure of 0.8MPa for 4h, and naturally cooling to obtain the baking-free bricks.
The performance of the baking-free brick is tested, and the average compressive strength and the average flexural strength of the baking-free brick prepared in the embodiment are 14.2Mpa and 3.8Mpa respectively.
Example 5
Firstly, crushing waste asphalt concrete to destroy cementation of asphalt among aggregates to form a single-grain structure of the aggregate externally wrapped with the asphalt, then sieving, wherein the grain size of the waste asphalt concrete obtained after sieving is 3-5 mm; cutting the waste of the glass fiber reinforced plastic plate into small blocks, and then crushing the small blocks of the waste of the glass fiber reinforced plastic by crushing equipment to obtain glass fiber reinforced plastic regenerated powder and glass fiber reinforced plastic regenerated fibers, wherein the glass fiber reinforced plastic regenerated powder is in a willow-like fluffy aggregation state and contains a large amount of synthetic resin dust, and the glass fiber reinforced plastic regenerated fibers are in a cotton-like fluffy aggregation state and have the length of between 3 and 15 mm; respectively weighing 40 parts of sieved waste asphalt concrete, 13 parts of regenerated glass fiber reinforced plastic, 18 parts of fly ash and 18 parts of lime powder according to the proportion, then mixing the regenerated glass fiber reinforced plastic, the fly ash and the lime powder for 4min, then adding the waste asphalt concrete for secondary mixing for 2min, then adding 11 parts of tap water and stirring, mixing the materials, and uniformly mixing to obtain a mixture; conveying the mixture into a pressing die, and pressing at a brick press with the thickness of 20N/mm2The pressing and forming are carried out under the pressure action, the pressing time is 20s, and green bricks are prepared; and (3) placing the green bricks for 3h, drying, then steaming in steam at the temperature of 170 ℃ and under the pressure of 1.0MPa for 5h, and naturally cooling to obtain the baking-free bricks.
The performance of the baking-free brick is tested, and the average compressive strength and the average flexural strength of the baking-free brick prepared in the embodiment are respectively 15.2Mpa and 4.1 Mpa.
As can be seen from the performance test results of examples 1-5, the average compressive strength and the breaking strength of the baking-free bricks prepared by the invention are obviously improved. In the invention, when the waste asphalt concrete is steamed and cured at high temperature, asphalt is in a molten state, and when the waste asphalt concrete is cooled down subsequently, regenerated glass fiber reinforced plastic fibers in contact with the waste asphalt concrete are bonded into 'wool spheres', fly ash and lime powder form calcium silicate hydrate solids when the waste asphalt concrete is steamed and cured at high temperature, and the glass fiber reinforced plastic fibers and the calcium silicate hydrate are tightly connected between the 'wool spheres' and the 'wool spheres', so that the prepared baking-free brick has a more compact structure, and the average compressive strength and the flexural strength are further improved; the addition of the waste asphalt concrete increases the breaking strength of the prepared baking-free brick to be larger than the compressive strength, and the breaking pressure of the baking-free brick is obviously improved compared with that of a common brick. And the problem of environmental pollution caused by stockpiling and treating the waste asphalt concrete and the glass fiber reinforced plastics can be solved, the waste asphalt concrete and the glass fiber reinforced plastics are recycled, and the energy consumption is greatly reduced. The prepared baking-free brick not only meets the use performance, but also completely meets the requirements of national standards, and realizes the resource recycling of the two wastes which are changed into valuable things in a greater sense.
The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A baking-free brick is characterized in that: the composition is prepared from the following components in parts by mass: 30-45 parts of waste asphalt concrete, 10-15 parts of regenerated glass fiber reinforced plastic, 15-20 parts of fly ash and 15-20 parts of lime powder, wherein the baking-free brick is prepared by taking the waste asphalt concrete and the regenerated glass fiber reinforced plastic as main materials, taking the fly ash and the lime powder as auxiliary materials, adding 15-20 parts of water, stirring and mixing, performing compression molding under a preset pressure, and performing steam curing in steam at a preset temperature and a preset pressure for a preset time.
2. The baking-free brick as claimed in claim 1, wherein: 35-40 parts of waste asphalt concrete, 12-13 parts of regenerated glass fiber reinforced plastic, 17-18 parts of fly ash, 17-18 parts of lime powder and 15-20 parts of water.
3. The baking-free brick as claimed in claim 1, wherein: 37 parts of waste asphalt concrete, 13 parts of regenerated glass fiber reinforced plastic, 17 parts of fly ash, 17 parts of lime powder and 16 parts of water.
4. The baking-free brick as claimed in claim 1,the method is characterized in that: the predetermined pressure is 20N/mm2The preset temperature is 170-180 ℃, the preset pressure is 0.8-1.0 Mpa, and the preset time is 4-6 hours.
5. A method for preparing a baking-free brick according to any one of claims 1 to 4, characterized in that: the method comprises the following steps:
(1) crushing the waste asphalt concrete to destroy the cementation of asphalt among aggregates to form particles wrapping the asphalt outside the aggregates, and sieving to screen out particles meeting a preset particle size;
(2) cutting the waste of the glass fiber reinforced plastic plate into blocks, and then crushing the glass fiber reinforced plastic waste of the blocks by crushing equipment to obtain glass fiber reinforced plastic regenerated powder and glass fiber reinforced plastic regenerated fibers;
(3) adding water into the waste asphalt concrete which is processed in the step (1) and accords with the preset particle size, the glass fiber reinforced plastic regenerated fiber processed in the step (2), the fly ash and the lime powder according to the proportion, stirring and mixing the materials to obtain a mixture;
(4) weighing the mixture prepared in the step (3), conveying the mixture into a pressing mold, performing compression molding under the action of preset pressure, and pressing for preset time to prepare a green brick;
(5) and (4) drying the green bricks prepared in the step (4) after the green bricks are placed for a set time, then steaming the green bricks in steam with a preset temperature and a preset pressure for a preset time, and naturally cooling the dried green bricks to obtain the baking-free bricks.
6. The method for preparing baking-free bricks according to claim 5, wherein the method comprises the following steps: and (2) the particle size of the waste asphalt concrete obtained after sieving in the step (1) is 3-5 mm.
7. The method for preparing baking-free bricks according to claim 5, wherein the method comprises the following steps: the fiberglass recycled powder in the step (2) is in a fluffy and conglobation state of a catkin shape and contains a large amount of synthetic resin dust; the glass fiber reinforced plastic regenerated fiber is in a cotton fluffy and conglobation state, and the length of the glass fiber reinforced plastic regenerated fiber is between 3mm and 15 mm.
8. The method for preparing baking-free bricks according to claim 5, wherein the method comprises the following steps: the material mixing in the step (3) comprises two processes, firstly, the glass fiber reinforced plastic regenerated powder and the glass fiber reinforced plastic regenerated fiber prepared in the step (2) are mixed with fly ash and lime powder before water is added, the mixing process is primary mixing, and the primary mixing time is 3-5 min; then adding the asphalt concrete particles prepared in the step (1) for secondary mixing, wherein the mixing time of the secondary mixing is 1-2 min; subsequently, water is added for mixing three times, and the added water comprises tap water.
9. The method for preparing baking-free bricks according to claim 5, wherein the method comprises the following steps: the brick press is used for pressing and molding in the step (4), and the preset pressure is 20N/mm2And the pressing time is 15-25 s.
10. The method for preparing baking-free bricks according to claim 5, wherein the method comprises the following steps: the setting time in the step (5) is 2-4 hours, the preset temperature is 170-180 ℃, the preset pressure is 0.8-1.0 Mpa, and the preset time is 4-6 hours.
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