CN115417621A - Method for preparing water permeable brick by using waste rubber and construction waste and application of water permeable brick - Google Patents
Method for preparing water permeable brick by using waste rubber and construction waste and application of water permeable brick Download PDFInfo
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- CN115417621A CN115417621A CN202210962435.9A CN202210962435A CN115417621A CN 115417621 A CN115417621 A CN 115417621A CN 202210962435 A CN202210962435 A CN 202210962435A CN 115417621 A CN115417621 A CN 115417621A
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Classifications
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/14—Polyepoxides
-
- 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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of solid waste resource utilization, in particular to a method for preparing a water permeable brick by utilizing waste rubber and construction waste and application of the water permeable brick, wherein the water permeable brick is prepared from the waste rubber and the construction waste, and the prepared water permeable brick is applied to a pavement water permeable pavement structure in the construction and transformation processes of a sponge city, so that the 'resource' of the waste rubber and the construction waste is realized, and the problem of landfill of the waste rubber and the construction waste is reduced; meanwhile, natural materials are saved, and the ecological environment is protected. In addition, the water permeable brick solves the important problem of ' middle seepage ', storage, stagnation, purification, use and drainage ' of a sponge city, accelerates rainwater permeation, and avoids municipal drainage overload, thereby reducing the probability of occurrence of waterlogging disasters in the city and improving the use comfort. The rubber strips mixed in the water permeable bricks play roles of energy dissipation units and reinforcement among construction waste particles, so that the brittle failure of the water permeable bricks is reduced, and the bending and pulling damage resistance of the water permeable bricks is improved.
Description
Technical Field
The invention relates to the technical field of solid waste resource utilization, in particular to a method for preparing a water permeable brick by utilizing waste rubber and construction waste and application of the water permeable brick.
Background
A large amount of construction waste (including concrete blocks, waste bricks, dregs and the like) is generated in the process of building, maintaining and dismantling the urban infrastructure. According to estimation, 500-600 tons of construction waste are generated when every 1 ten thousand m < 2 > of construction is newly built; and 7000-12000 tons of construction waste are generated when 1 ten thousand m < 2 > old buildings are dismantled. The stacked construction waste not only causes serious environmental pollution problem, but also brings serious security threat to the city. Therefore, how to treat and utilize more and more construction wastes has become an important problem to be solved urgently.
On the other hand, the waste tire belongs to thermosetting polymer materials, has the characteristics of high strength, wear resistance, stability and aging resistance, and causes the problem that the waste tire is difficult to degrade under natural conditions. If the waste rubber is directly stacked and buried, not only the land is occupied and the environment is polluted, but also fire hazard exists.
Meanwhile, china is currently carrying out large-scale sponge city construction. The sponge city can absorb and store rainwater like a piece of sponge, recycles the rainwater and reduces the influence of initial large-flow rainwater runoff. The sponge city construction changes the traditional 'fast discharge' mode into the organic combination of 'seepage, storage, stagnation, purification, use and discharge', and reduces the negative influence of the urbanization development construction on the original natural hydrological characteristics and the water ecological environment to the maximum extent. The water permeability of road pavement will play an important role in the infiltration, detention, storage and purification of rainwater, wherein the research and application of brick that permeates water are constantly increasing. At present, the mainstream permeable bricks mainly comprise 5 types, including common cement bricks, epoxy resin permeable bricks, concrete permeable bricks, sand-based permeable bricks and ceramic permeable bricks. Although various water permeable bricks can play a good role in water permeability, the water permeable bricks have different material processes, so that the water permeable bricks have problems in the use process: the compression resistance of the common cement brick is poor; the concrete permeable brick has low manufacturing cost, but has the problem of easy blockage due to larger gaps among aggregates, and the permeability of the concrete permeable brick is obviously reduced after the concrete permeable brick is used for 2 years; the sand-based water permeable brick needs natural sand, the natural sand belongs to natural resources, the exploitation of river sand and sea sand damages the ecological environment, and the purchase cost is extremely high; the ceramic water permeable brick needs to be formed at high temperature and has poor freezing resistance. Therefore, research on the preparation and application of the epoxy resin water permeable brick needs to be carried out.
Comprehensively considering the above conditions, if the waste rubber and the construction waste are crushed into particles to be made into the water permeable brick, the waste rubber and the construction waste are recycled, the pollution of the construction waste to the environment is reduced, the problem about the permeation in the construction of sponge cities is solved, and the environment benefit, the social benefit and the economic benefit are obvious.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides a method for preparing the water permeable brick by using the waste rubber and the building garbage and the application of the water permeable brick, in particular to a water permeable brick prepared by using waste rubber strips and building garbage particles.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
a method for preparing a water permeable brick by using waste rubber and construction waste comprises the following steps:
collecting waste rubber and construction waste;
preparing waste rubber into rubber strips, and preparing construction waste into construction waste particles;
after the collected waste rubber and construction waste are made into rubber strips and construction waste particles, respectively cleaning and airing the rubber strips and the construction waste particles;
preparing an adhesive, putting the prepared adhesive into a stirring container, adding the rubber strips and the construction waste particles into the stirring container, and fully stirring to form a mixture raw material of the water permeable brick;
filling the stirred mixture raw materials into a mold of a water permeable brick, tamping, vibrating, forming and sealing;
then placing the permeable brick with the mold indoors, overturning the permeable brick once every 30 minutes or more for a plurality of times, placing the permeable brick at room temperature for at least more than 1 day, removing the mold, and finally continuously placing the permeable brick without the mold indoors for airing;
finally obtaining the water permeable brick prepared by using the waste rubber and the construction waste.
The rubber strips mixed in the water permeable bricks play roles of energy dissipation units and reinforcement among construction waste particles, so that the brittle failure of the water permeable bricks is favorably reduced, the water permeable bricks have certain plastic failure characteristics, and the bending and pulling failure resistance of the water permeable bricks is improved.
Further, the mass ratio of the rubber strips, the adhesive and the construction waste particles is 1.
Further, the adhesive is a two-component epoxy resin, the two-component epoxy resin is composed of a component A and a component B, the mass ratio of the component A to the component B is 100.
Further, the component A is bisphenol A type epoxy resin, and the component B is an epoxy resin curing agent.
Further, the length of the rubber strip is 40-50mm, and the diameter of the rubber strip is 4-5mm.
Further, after the construction waste particles are manufactured, the construction waste particles are screened into construction waste fine particles and construction waste coarse particles, the particle size range of the construction waste fine particles is 2-5mm, and the particle size range of the construction waste coarse particles is 4-10mm.
Further, the adding mass ratio of the construction waste fine particles to the construction waste coarse particles is 6.
The application of the water permeable brick prepared by the method for preparing the water permeable brick from the waste rubber and the construction waste is applied to a pavement paving structure in a sponge city.
Furthermore, the pavement paving structure comprises a surface layer, a leveling layer, a base layer and a soil base layer, wherein the water permeable bricks are applied to the surface layer.
Furthermore, the leveling layer is a water-permeable bonding leveling layer, the base layer is a water-permeable mud-mixing soil layer, and the water-permeable bonding leveling layer is prepared from a binder PZG and medium coarse sand according to a mass ratio of 1.
The invention has the beneficial effects that:
compared with the prior art, the water permeable brick is manufactured by using the waste rubber strips and the construction waste, so that the 'recycling' of the construction waste is realized, the treatment and disposal cost of the construction waste is reduced, and the possible environmental hazard and safety risk in the process of piling up the construction waste are reduced.
The construction waste is used as the manufacturing material of the water permeable brick, so that the natural resources are saved to the maximum extent, and the ecological environment is protected. The construction waste is waste, and purchasing cost is basically not needed, so that the construction waste is used for replacing natural sand and stone materials used in the process of manufacturing the water permeable bricks, and the construction cost of the water permeable bricks is reduced.
Compared with the water permeable brick made of natural materials, the water permeable brick made of the waste rubber strips and the construction waste particles has the advantages of good water permeability, light weight, high strength, sintering-free property and the like. The rubber strips produced by the waste rubber are doped into the construction waste particles to prepare the water permeable brick, so that a large amount of construction waste and waste rubber can be consumed, the secondary utilization of solid waste is realized, and the ductility, the shock resistance, the freeze resistance and other performances of the water permeable brick can be improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of the internal structure of the water permeable brick of the present invention.
Fig. 2 is a schematic view of the pavement paving structure a of the present invention.
Fig. 3 is a schematic view of the pavement paving structure B of the present invention.
FIG. 4 is a schematic diagram of the splitting tensile test of the water permeable brick of the present invention.
FIG. 5 is a schematic diagram of the water permeability coefficient test of the water permeable brick of the present invention.
FIG. 6 is a schematic diagram of the compressive strength test of the permeable brick of the present invention.
In the figure: 1-rubber strips, 2-coarse particles of construction waste, 3-fine particles of construction waste, 4-adhesive, 5-pores, 6-surface layer, 7-leveling layer, 8-permeable concrete, 9-graded broken stone and 10-soil base layer.
Detailed Description
Hereinafter, a method for preparing a water permeable brick by using waste rubber and construction waste and an application technical scheme of the water permeable brick provided by the embodiment of the invention will be described in detail through several specific embodiments.
Firstly, the construction waste of the present invention is mainly composed of construction waste bricks and tiles, construction waste concrete, mortar, stone, ceramics and other materials with certain hardness, wherein the soft soil needs to be screened or cleaned.
Referring to fig. 1, a method for preparing a water permeable brick by using waste rubber and construction waste comprises the following steps:
collecting waste rubber and construction waste; then sorting out waste rubber and construction waste;
respectively preparing waste rubber into rubber strips 1 and preparing construction waste into construction waste particles;
after the collected waste rubber and construction waste are made into rubber strips and construction waste particles, the rubber strips and the construction waste particles need to be cleaned and dried respectively;
preparing an adhesive 4, putting the prepared adhesive into a stirring container, adding the rubber strips and the construction waste particles into the stirring container, and fully stirring to form a mixture raw material of the water permeable brick;
filling the stirred mixture raw materials into a mold of a water permeable brick, tamping, vibrating, molding and sealing; the reason for this sealing treatment is: and when the mixture of the building rubbish, the epoxy resin and the rubber strip is filled into the mould, the mould needs to be turned over, so that the epoxy resin is uniformly distributed in the permeable brick sample. Because the upper surface of the mold is opened, the epoxy resin in the mixture at the early stage is not cured, and the mixture is easy to loosen and scatter during overturning, thereby influencing the forming, compactness and flatness of the water permeable brick.
And (3) sealing: the whole outer side of the mould is tightly wrapped by the preservative film, and then is wound by the adhesive tape for fixing. It is also possible to customize the mould with a sealing function (the mould is not open, with a lid), and after the mixture has been tapped, the lid of the mould is closed for subsequent turning.
Then placing the permeable brick with the mold indoors, overturning the permeable brick once every 30 minutes or more for a plurality of times, placing the permeable brick at room temperature for at least more than 1 day, removing the mold, and finally continuously placing the permeable brick without the mold indoors for airing; the water permeable bricks are usually obtained by airing for more than 3 days in a natural environment; the process is turned over once every 30 minutes in actual operation, and the process is turned over for 5 times in total, so that the adhesive 4 can be uniformly distributed at the contact positions of the rubber strips and the construction waste particles, and the construction waste particles.
Finally obtaining the water permeable brick prepared by the waste rubber and the construction waste.
And airing for more than 3 days to obtain the water permeable brick, completely airing, meeting the requirement of the bearing strength of the pavement, and avoiding damage caused by not airing.
Further, the adding mass ratio of the rubber strip 1, the adhesive 4 and the construction waste particles is 1; the bearing capacity of the brick can be increased by adding the rubber strip into the water permeable brick, and meanwhile, the brick is not easy to break.
Further, the adhesive 4 is a two-component epoxy resin, the two-component epoxy resin is composed of a component A and a component B, the mass ratio of the component A to the component B is 100.
Epoxy resins have good compatibility with various metallic materials such as aluminum, iron, copper; non-metallic materials such as glass, wood, concrete, etc.; and thermosetting plastics such as phenol formaldehyde, amino, unsaturated polyester, etc. have excellent adhesion properties, and are therefore called all-purpose adhesives. Therefore, the epoxy resin is selected as the adhesive in the invention.
Further, the component A in the two-component epoxy resin is bisphenol A type epoxy resin, and the component B is an epoxy resin curing agent. Wherein, the bisphenol A type epoxy resin and the epoxy resin curing agent both adopt M03 epoxy resin glue (GCC 135 epoxy resin and GCC137 curing agent) produced by Kunshanjiulimei electronic materials, which are directly purchased and mixed in advance when in use, and then the rubber strips and the construction waste particles are added. The component A is bisphenol A epoxy resin, colorless transparent liquid; the component B is amine curing agent and blue transparent liquid; the amine curing agent has high reactivity and can be rapidly cured at room temperature or low temperature. The adhesive 1 is made of bi-component epoxy resin, so that the adhesive has high strength and bonding strength, and the water permeable brick made of the adhesive has high strength.
Furthermore, the rubber strip 1 has a length of 40-50mm and a diameter of 4-5mm, so that the water permeable bricks with various sizes can be used, and the manufactured water permeable bricks have high strength and are not easy to break and damage.
Further, after the construction waste particles are manufactured, the construction waste particles are screened into construction waste fine particles 3 and construction waste coarse particles 2, the particle size range of the construction waste fine particles 3 is 2-5mm, the particle size range of the construction waste coarse particles 2 is 4-10mm, the specification adopted in an actual experiment is that the particle size range of the construction waste fine particles 3 is 2.36-4.75mm, and the particle size range of the construction waste coarse particles 2 is 4.75-9.50mm.
When the construction waste is used for manufacturing construction waste particles, manual separation and ramming are needed, the construction waste particles are crushed into small blocks with moderate particle sizes, the small blocks are crushed into particles with different particle sizes through a crusher, floating soil outside the construction waste particles with different particle sizes is washed away through a sand washer, the cleaned construction waste is spread on a clean cement ground to be dried, the dried construction waste particles are screened into construction waste fine particles 3 and construction waste coarse particles 2, the particle size range of the construction waste fine particles 3 is 2.36-4.75mm, the particle size range of the construction waste coarse particles 2 is 4.75-9.50mm, the construction waste particles are suitable for permeable bricks with different sizes, meanwhile, pores 5 can be formed in the bricks through the coarse and fine particles, the bricks have a permeable function, and meanwhile, the bricks are more compact and have higher strength through the coarse and fine particles.
In actual use, adhesive 1: rubber strips: building waste fine particles: the mass ratio of the coarse particles of the construction waste is 8:8: 24:60, paving the mixture into a mould, and finally tamping, vibrating and molding to obtain the water permeable brick with the optimal water permeability.
Further, the adding mass ratio of the construction waste fine particles 3 to the construction waste coarse particles 2 is 6. This proportion has satisfied the permeable to water demand of the brick that permeates water, and the effect that permeates water simultaneously is the best, and the intensity of fragment of brick is the best simultaneously.
Referring to fig. 2 and 3, an application of a water permeable brick prepared by using waste rubber and construction waste is applied to a pavement structure in a sponge city. The waste rubber and the construction waste are used as the manufacturing materials of the water permeable brick, so that the natural resources are saved to the maximum extent, and the ecological environment is protected.
Meanwhile, the permeable brick made of the waste rubber and the construction waste can realize the reutilization of solid waste, and the waste rubber has the advantages of light weight, high elasticity, wear resistance and the like, and can improve the ductility, shock resistance, freezing resistance and other properties of the permeable brick. The doped rubber strips play roles of energy consumption units and reinforcement among construction waste particles, so that the brittle failure of the water permeable bricks is favorably reduced, the water permeable bricks have certain plastic failure characteristics, and the bending and pulling damage resistance of the water permeable bricks is improved, so that the water permeable bricks can be applied to pavement of sponge urban roadways and sidewalks.
Furthermore, the pavement paving structure comprises a surface layer 6, a leveling layer 7, a base layer and a soil base layer 10, and the water permeable bricks are applied to the surface layer 6. Wherein the basic unit contains and only permeates water and mixes 8 one deck structures of earth, also can contain and permeate water and mix two-layer structure of earth 8 and graded rubble 9, can set up the number of piles of whole road surface pavement structure according to the needs of bearing capacity, and screed 7 is the bonding screed-coat that permeates water, and soil base 10 is the flat soil basic unit after the compaction, all has the water permeability.
The invention shows two pavement paving structures, namely a pavement paving structure A and a pavement paving structure B, wherein the pavement paving structure A comprises a surface layer made of the water permeable bricks, a leveling layer 7, water permeable concrete 8, graded broken stones 9 and a soil base layer 10; the pavement paving structure B comprises the water permeable bricks made by the invention as a surface layer, a leveling layer 7, graded broken stones 9 and a soil base layer 10, and the pavement structure is suitable for pavements with low bearing strength, such as roadside pedestrian pavements.
Further, the screed-coat for permeating water the bonding screed-coat, make its water that permeates water the brick infiltration can pass the bonding screed-coat that permeates water, the basic unit is for permeating water muddy dirt layer, then water gets into the muddy dirt layer that permeates water, then enters into native basic unit 10 infiltration through the gradation rubble and discharges, perhaps collects the discharge at the gradation rubble layer, the bonding screed-coat that permeates water is made according to the mass ratio of 10 by binder PZG and well coarse sand, makes it permeate water the bonding screed-coat water permeability strong, can discharge the infiltration very fast of the water that permeates water the brick, makes its road surface can not ponding.
Wherein the adhesive leveling layer is formed by the adhesive PZG and the medium-coarseThe sand is prepared according to the mass ratio of 1 -2 cm/s, effective porosity of the pervious concrete base layer is not less than 15%, and permeability coefficient is not less than 2.5 multiplied by 10- 2 The top surface compaction degree of the graded broken stone base course is 96% cm/s, and the soil base course 10 is a smooth-surfaced soil base course with the compaction coefficient not less than 93% and the elevation meeting the design requirement.
Further, the method for laying the road surface paving structure comprises the following laying method:
s1, trimming a roadbed, removing humus, and compacting and leveling a soil foundation layer;
s2, paving the pervious concrete and/or graded broken stones on a soil base layer for compaction and leveling;
after the paving is finished, the flatness and the compressive strength are checked, and the paving can be continued only after the standard is met;
the concrete and the gravel have good bearing capacity and water seepage performance;
and S3, paving the bonding leveling layer on the pervious concrete and/or the graded broken stone on the S2.
S4: and finally, paving the water permeable bricks.
When the water permeable bricks are stacked, the water permeable bricks are lightly handled and placed, and the bricks with cracks, falling corners, surface defects and corner damage are strictly forbidden to be used. The method can lay the pavement structure laid by the water permeable bricks which are required to be made of the waste rubber and the building rubbish, and the pavement structure has strong water permeability, so that the water permeability of the whole pavement is good, the water is not easy to accumulate on the pavement, and the problem of the water accumulation of the current urban pavement is solved.
The experimental process comprises the following steps:
the periphery of the permeable brick sample is sealed by a thickened waterproof adhesive tape, so that the permeable brick sample is not leaked, and water only permeates from the upper surface and the lower surface of the sample. And putting the sample with the sealed side surface into a vacuum device, vacuumizing to 90kPa, and keeping for 30min. And (3) while maintaining the vacuum, adding enough water to cover the sample and enable the water level to be 10cm higher than the sample, stopping vacuumizing, soaking for 20min, taking out the sample, loading the sample into a water permeability coefficient testing device, and connecting and sealing the sample and the water permeability cylinder. Putting the water into an overflow water tank, opening a water supply valve to enable water to enter a container, adjusting water inflow when water flows out of an overflow hole of the overflow water tank, enabling a water permeable cylinder to keep a certain water level (about 15 cm), after the water flows out of an overflow port of the overflow water tank and an overflow port of a water permeable cylinder are stable, using a measuring cylinder to receive water from a water outlet, recording the water flow (Q) flowing out in five minutes, measuring for three times, and taking an average value.
The water permeability coefficient calculation formula is as follows:
KT-water permeability coefficient (cm/s);
water seepage (mL) in Q-t seconds;
l-thickness (cm) of the sample;
a-area of the upper surface of the sample (cm) 2 )；
H-head (cm);
t-time(s).
The water permeable pavement bricks and the water permeable pavement slabs (GB/T25993-2010) specify that the splitting tensile strength and the water permeability coefficient of the water permeable blocks respectively accord with the specifications of tables 5 and 6, namely the splitting tensile strength f ts ≧ 3.0MPa, coefficient of permeability K T ≧0.02cm/s。
Referring to fig. 4, 5 and 6, after a plurality of tests, the water permeable brick samples with the contents of construction waste particles, epoxy resin and rubber strips of 90%, 9% and 1%, respectively (construction waste fine particles: construction waste coarse particles = 6) satisfy the above conditions, and the splitting tensile strength f ts =3.6MPa, water permeability coefficient K T The compressive strength is 21.1MPa, and the concrete is suitable for paving pedestrian streets, residential roads, garden landscape roads and the like which do not allow motor vehicles to pass and drive in. If the epoxy resin rubber strip is used for vehicle roads such as parking lots and the like, the content of the epoxy resin needs to be increased to 10%, the proportion of the rubber strip is unchanged and still is 1%, and correspondingly, the content of the construction waste particles is reduced to 89%.
The water permeability contrast with the existing ceramic water permeable brick:
see the paper: zhu M, wang H, liu L, et al preparation and characterization of permanent bricks from gangue and tailings[J].Construction&The water permeability of the existing ceramic water permeable bricks in Building Materials,2017,148 (sep.1), 484-491, zhu et al use 60-70wt% coal gangue and 10-20wt% waste ceramic as aggregate for stacking, mix with 20wt% tailings, and keep the temperature at 1180-1200 ℃ for 45min to obtain the compressive strength>30MPa and a water permeability coefficient of about 3 multiplied by 10 -2 cm/s of ceramic water permeable bricks; compared with the permeable brick, the permeable brick has the water permeability coefficient K T =0.05cm/s, which is far larger than the water permeability of the existing ceramic water permeable brick; the water permeable brick prepared by the preparation method has the advantages of good water permeability, light weight, high strength, sintering prevention and the like. The rubber strips produced by the waste rubber are doped into the construction waste particles to prepare the water permeable brick, so that a large amount of construction waste and waste rubber can be consumed, the secondary utilization of solid waste is realized, and the performances of the water permeable brick, such as ductility, earthquake resistance, freezing resistance and the like, can be improved.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is within the scope of the claims.
Technical solutions between various embodiments may be combined with each other, but must be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Claims (10)
1. A method for preparing a water permeable brick by using waste rubber and construction waste is characterized by comprising the following steps: the method comprises the following steps:
collecting waste rubber and construction waste;
preparing waste rubber into rubber strips, and preparing construction waste into construction waste particles;
after the collected waste rubber and construction waste are made into rubber strips and construction waste particles, respectively cleaning and airing the rubber strips and the construction waste particles;
preparing an adhesive, putting the prepared adhesive into a stirring container, adding the rubber strips and the construction waste particles into the stirring container, and fully stirring to form a mixture raw material of the water permeable brick;
filling the stirred mixture raw materials into a mold of a water permeable brick, tamping, vibrating, molding and sealing;
then placing the permeable brick with the mold indoors, overturning the permeable brick once every 30 minutes or more, overturning the permeable brick for many times, placing the permeable brick at room temperature for at least more than 1 day, removing the mold, and finally continuously placing the permeable brick without the mold indoors for airing; finally obtaining the water permeable brick prepared by using the waste rubber and the construction waste.
2. The method for preparing the water permeable brick by using the waste rubber and the construction waste as claimed in claim 1, which is characterized in that: the mass ratio of the rubber strips, the adhesive and the construction waste particles is 1.
3. The method for preparing the water permeable brick by using the waste rubber and the construction waste as claimed in claim 2, which is characterized in that: the adhesive is a two-component epoxy resin, the two-component epoxy resin is composed of a component A and a component B, the mass ratio of the component A to the component B is 100.
4. The method for preparing the water permeable brick by using the waste rubber and the construction waste as claimed in claim 3, which is characterized in that: the component A is bisphenol A type epoxy resin, and the component B is an epoxy resin curing agent.
5. The method for preparing water permeable brick from waste rubber and construction waste as claimed in claim 1, 2, 3 or 4, wherein the method comprises the following steps: the length of the rubber strip is 40-50mm, and the diameter of the rubber strip is 4-5mm.
6. The method for preparing the water permeable brick by using the waste rubber and the construction waste as claimed in claim 1, which is characterized in that: after the construction waste particles are manufactured, the construction waste particles are screened into construction waste fine particles and construction waste coarse particles, the particle size range of the construction waste fine particles is 2-5mm, and the particle size range of the construction waste coarse particles is 4-10mm.
7. The method for preparing the water permeable brick by using the waste rubber and the construction waste as claimed in claim 6, which is characterized in that: the adding mass ratio of the construction waste fine particles to the construction waste coarse particles is 6.
8. An application of a water permeable brick prepared from waste rubber and construction waste is characterized in that: the water permeable brick prepared by the method for preparing the water permeable brick by using the waste rubber and the construction waste according to any one of claims 1 to 7 is applied to a pavement structure in a sponge city.
9. The use of the permeable brick made of the waste rubber and the construction waste as claimed in claim 8, wherein the permeable brick is characterized in that: the pavement paving structure comprises a surface layer, a leveling layer, a base layer and a soil base layer, wherein the water permeable bricks are applied to the surface layer.
10. The use of the permeable brick made of the waste rubber and the construction waste as claimed in claim 9, wherein the permeable brick is characterized in that: the leveling layer is a water-permeable bonding leveling layer, the base layer is a water-permeable mud-mixed soil layer, and the water-permeable bonding leveling layer is prepared from a binder PZG and medium coarse sand according to the mass ratio of 1.
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