CN107476165B - Water seepage pavement with air purification function and preparation method thereof - Google Patents
Water seepage pavement with air purification function and preparation method thereof Download PDFInfo
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- CN107476165B CN107476165B CN201710610024.2A CN201710610024A CN107476165B CN 107476165 B CN107476165 B CN 107476165B CN 201710610024 A CN201710610024 A CN 201710610024A CN 107476165 B CN107476165 B CN 107476165B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
- E01C11/226—Coherent pavings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D49/00—Separating dispersed particles from gases, air or vapours by other methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
- B01D53/565—Nitrogen oxides by treating the gases with solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/802—Visible light
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The invention provides a water seepage pavement with an air purification function and a preparation method thereof, wherein the water seepage pavement comprises an upper pavement and a lower pavement; the upper layer pavement comprises the following raw materials in parts by weight: 5-95 parts of coarse aggregate; 1-5 parts of basalt fiber; 1-10 parts of a high-molecular binder; 1-5 parts of a coloring agent; 1-5 parts of air purification material; the lower layer pavement comprises the following raw materials: 1-20 parts of an inorganic adhesive; 1-90 parts of coarse aggregate; 1-5 parts of basalt fiber; 8-25 parts of water. The removal rate of formaldehyde, PM2.5 and oxynitride on the prepared water seepage pavement within 24 hours reaches more than 65 percent, 45 percent and 90 percent respectively; the 28-day compressive strength of the pavement reaches more than 50MPa, and the water permeability reaches 200L/(m)2Min) above. And the process is simple and easy to operate, the raw material cost is low, and the method is suitable for industrial production.
Description
Technical Field
The invention relates to a novel environment-friendly pavement material, in particular to a water-permeable pavement with an air purification function and a preparation method thereof.
Background
With the development of the urbanization process, the construction pace of the city is accelerated, and the ecological environment of the city bears huge pressure. The earth surface of modern cities is gradually hardened and covered by water-blocking materials such as buildings, concrete and the like to form ecological artificial deserts. These water-impermeable pavements have a great negative impact on the ecological environment of the city. Therefore, people pay attention to how to realize environmental protection and harmonious development of economy and society in urban construction. The urban water resource is supplemented, and the economic benefit, the safety and the ecological environment protection of enterprises are both great.
At present, more water seepage pavements have been built to solve the problem of urban water resource shortage. However, in the prior art, the water permeable pavement is mainly prepared from single aggregate, and sand-free and porous concrete prepared from no or little fine aggregate is used. The porosity of the pavement is larger than that of the traditional pavement, and water seepage is easy to occur. However, the porosity becomes large, resulting in poor strength, so that most permeable pavements are suitable only for non-motor lanes or sidewalks. Therefore, the construction of the high-strength water seepage pavement has good social significance. Basalt fiber, as an active material, exhibits an affinity for cement substrates or stone materials that is superior to other reinforcing fibers. As a brittle material, cement is easy to form a large number of pores and cracks inside and on the surface in the process of pouring and curing, thereby influencing various mechanical properties of a base material. And the basalt fiber is used as a cement reinforcing material, so that the pores and cracks of the cement base material can be obviously reduced. This is because the matrix loading fiber can prevent the expansion of the crack and absorb the energy of the crack, thereby improving various mechanical properties of the cement matrix. Therefore, the research on the combination of the basalt fiber and the existing permeable pavement is very important.
Meanwhile, there is a serious environmental problem that various vehicles running on the road surface contribute most of haze (PM2.5) and various harmful Volatile Organic Compounds (VOC) in the air pollutants. These gaseous and particulate contaminants can cause significant physical and psychological damage to humans. Therefore, providing a certain solution on road surfaces, the technical study of the adsorption and degradation of pollutants in the first moment is also very important.
Therefore, a technical scheme for providing a water seepage road surface with an air purification function and a preparation and application method thereof is urgently needed.
Disclosure of Invention
The invention aims to solve the problems of low strength of the water seepage road surface, no air purification function of the road surface and serious environmental pollution in the prior art; provides a water seepage road surface with air purification function and a preparation method thereof.
In order to achieve the above purpose, the invention provides the following technical scheme:
the embodiment of the invention provides a water seepage road surface with an air purification function, which comprises an upper layer road surface and a lower layer road surface; the upper layer pavement comprises the following raw materials in parts by weight: coarse aggregate, 5-95 parts (e.g., 5 parts, 10 parts, 25 parts, 35 parts, 50 parts, 60 parts, 75 parts, 85 parts, 90 parts, and 95 parts, or a range between any one or two); basalt fiber, 1-5 parts (e.g., any one of 1 part, 2 parts, 3 parts, 4 parts, and 5 parts or a range between two); 1-10 parts (for example, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts and 10 parts) of a polymer binder; a colorant, 1-5 parts (e.g., any one of 1 part, 2 parts, 3 parts, 4 parts, and 5 parts or a range therebetween); 1-5 parts (e.g., any one or a range between 1 part, 2 parts, 3 parts, 4 parts, and 5 parts); the lower layer pavement comprises the following raw materials in parts by weight: 1 to 20 parts (for example, 1 part, 5 parts, 10 parts, 12 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, and 20 parts) of an inorganic binder; coarse aggregate, 1-90 parts (e.g., any one of 5 parts, 10 parts, 25 parts, 35 parts, 50 parts, 60 parts, 75 parts, 85 parts, and 90 parts or a range between two); basalt fiber, 1-5 parts (e.g., any one of 1 part, 2 parts, 3 parts, 4 parts, and 5 parts or a range between two); water, 8-25 parts (e.g., any one of 8 parts, 10 parts, 15 parts, 18 parts, 20 parts, 24 parts, and 25 parts or a range between two).
The water seepage pavement with the air purification function preferably comprises the following raw materials in parts by weight: coarse aggregate, 20-90 parts (e.g., any one of 20 parts, 22 parts, 25 parts, 35 parts, 50 parts, 60 parts, 75 parts, 85 parts, and 90 parts or a range between two); basalt fiber, 2-5 parts (e.g., any one of 2 parts, 2.5 parts, 3.5 parts, 4.5 parts, and 5 parts or a range between two); 4-8 parts (for example, any one or a range between 4 parts, 4.5 parts, 5.5 parts, 6.5 parts, 7.5 parts and 8 parts); 2-4 parts (e.g., any one or a range between 2 parts, 2.5 parts, 3.5 parts, 3.8 parts, and 4 parts); 3-5 parts (e.g., any one or a range between 3 parts, 3.5 parts, 4.5 parts, and 5 parts); the lower layer pavement comprises the following raw materials in parts by weight: an inorganic binder, 8 to 16 parts (for example, any one or a range between 8 parts, 8.5 parts, 12 parts, 13 parts, 14 parts, 15 parts, 15.5 parts, and 16 parts); coarse aggregate, 2-85 parts (e.g., any one or a range between 2 parts, 7 parts, 12 parts, 23 parts, 31 parts, 55 parts, 67 parts, 72 parts, 84 parts, and 85 parts); basalt fiber, 3-4 parts (e.g., any one of 3 parts, 3.2 parts, and 4 or a range between two); water, 10-20 parts (e.g., any one or a range between 10 parts, 12 parts, 13 parts, 17 parts, 18 parts, and 20 parts).
The water seepage pavement with the air purification function preferably comprises the following raw materials in parts by weight: 80 parts of coarse aggregate; 2 parts of basalt fibers; 5 parts of a high-molecular binder; 3 parts of a colorant; 5 parts of air purification material; the lower layer pavement comprises the following raw materials in parts by weight: 10 parts of inorganic adhesive; 82 parts of coarse aggregate; 3 parts of basalt fibers; water, 15 parts.
The permeable pavement with the air purification function is further preferably characterized in that the air purification material in the upper pavement comprises one or more selected from nano titanium dioxide, nano zinc oxide, MOF material, activated carbon, molecular sieve, activated alumina, activated carbon fiber and diatomite.
In the present invention, it is to be noted that a Metal Organic Framework (MOF) material is a coordination polymer which develops rapidly in the last decade, has a three-dimensional pore structure, generally uses Metal ions as connection points, and supports Organic ligands to form a space 3D extension, and is an important new type of porous material besides zeolite and carbon nanotubes, and is widely applied in catalysis, energy storage and separation. Currently, MOFs have become an important research direction for many chemical branches of inorganic chemistry, organic chemistry, and the like.
The permeable pavement with the air purification function is further preferably characterized in that the air purification material in the upper pavement comprises one or more selected from nano titanium dioxide, nano zinc oxide, MOF material, activated carbon, molecular sieve, activated alumina and diatomite; and the air purification material comprises the following components in parts by weight: 20-50 parts (for example, 20 parts, 22 parts, 25 parts, 30 parts, 35 parts, 40 parts, 42 parts, 45 parts, 48 parts and 50 parts of any one or a range between two parts); nano zinc oxide, 10-30 parts (e.g., any one of 10 parts, 12 parts, 14 parts, 16 parts, 20 parts, 23 parts, 26 parts, 28 parts, and 30 parts or a range between two); MOF material, 1-5 parts (e.g., any one of 1 part, 2 parts, 3 parts, 4 parts, and 5 parts or a range between two); 5-10 parts of activated carbon (e.g., any one or a range between 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, and 10 parts); molecular sieve, 10-25 parts (e.g., any one or a range between 10 parts, 11 parts, 14 parts, 18 parts, 20 parts, 22 parts, 24 parts, and 25 parts); activated alumina, 10-20 parts (e.g., any one of 10 parts, 12 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, and 20 parts or a range therebetween); diatomaceous earth, 5-10 parts (e.g., any one or a range between 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, and 10 parts).
The permeable pavement with the air purification function is further preferably characterized in that the nano titanium dioxide is anatase type carbon dioxide; the particle sizes of the nano titania, the nano zinc oxide and the MOF material are each 20-50nm (e.g., 20nm, 22nm, 23nm, 25nm, 30nm, 35nm, 40nm, 45nm and 50nm, either alone or in a range between two); the particle sizes of the active carbon, the active alumina, the active carbon fiber and the diatomite are all less than 30 mu m; the particle size of the molecular sieve is less than 50 μm; and the molecular sieve is one or more of hydrogen mordenite, hydrogen saponated zeolite, dealuminized mordenite and BX type molecular sieve; the MOF material is any one or more of ZIF-8, ZIF-67 and Ni-ZIF-8.
The permeable pavement having the air purification function as described above, further preferably, in the upper pavement, the colorant is an inorganic pigment; preferably, the pigment is chrome yellow or molybdenum-chromium scarlet inorganic pigment. The basalt fibers are 5mm chopped basalt fibers; the high molecular binder is composed of one or more of bisphenol A epoxy resin, polyurethane resin and acrylic resin; the coarse aggregate has a particle size of 5-9mm (e.g., any one or a range between 5mm, 6mm, 7mm, 8mm, and 9 mm); in the underlying pavement, the inorganic binder is 42.5-grade portland cement; the basalt fiber is 10mm chopped basalt fiber; the coarse aggregate has a particle size of 12-15mm (e.g., 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, and 15mm in any one or a range between two).
A water permeable pavement having an air purifying function as described above, further preferably, the upper pavement has a thickness of 25 to 45mm (e.g., in a range between any one or two of 25mm, 26mm, 28mm, 30mm, 35mm, 38mm, 42mm and 45 mm), and a porosity of 15 to 20% (e.g., in a range between any one or two of 15%, 16%, 17%, 18%, 19% and 20%); the thickness of the sub-layer pavement is 50-110mm (e.g., 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 90mm, 95mm, 100mm, 105mm and 110mm in any one or a range between two), and the porosity of the sub-layer pavement is 20-25% (e.g., 20%, 21%, 22%, 23%, 24% and 25% in any one or a range between two).
The permeable pavement with the air purification function is further preferably characterized in that in the upper pavement, the polymer binder comprises any one or more of bisphenol A epoxy resin, polyurethane resin and acrylic resin; preferably, the polymer binder comprises the following components in parts by weight: 60 to 80 parts (for example, any one or a range between 60 parts, 65 parts, 68 parts, 70 parts, 75 parts, 79 parts, and 80 parts); 10-20 parts of a polyurethane resin (e.g., any one or a range between 10 parts, 12 parts, 15 parts, 16 parts, 17 parts, 19 parts, and 20 parts); acrylic resin, 10-20 parts (e.g., any one of 10 parts, 11 parts, 13 parts, 15 parts, 18 parts, 19 parts, and 20 parts or a range between two).
A preparation method of a water permeable pavement with an air purification function comprises the following steps:
1) firstly, preparing an underlying pavement material, weighing an inorganic binder, coarse aggregates, basalt fibers and water according to the proportion of each component in the underlying pavement, mixing, uniformly stirring in a sand mixer to obtain underlying pavement slurry, uniformly coating the underlying pavement slurry on a base pavement (the base pavement is a soil base layer below a water seepage layer), wherein the coating thickness is 50-110mm (for example, any one or a range between 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 90mm, 95mm, 100mm, 105mm and 110 mm);
2) and then preparing an upper layer pavement material, weighing the raw materials according to the proportion of each component in the upper layer pavement, uniformly mixing the air purification material and the high molecular binder to obtain a composition, then mixing the composition with coarse aggregates, basalt fibers and a coloring agent, uniformly stirring in a sand mixer to obtain upper layer pavement slurry, uniformly coating the upper layer pavement slurry on the lower layer pavement material in the step 1), wherein the coating thickness is 25-45mm (for example, any one or the range between 25mm, 26mm, 28mm, 30mm, 35mm, 38mm, 42mm and 45 mm).
In the method for preparing the permeable pavement with the air purification function, it is further preferable that the spraying process is further adopted to treat the upper layer pavement material in the step 2) or the existing permeable pavement directly; the spraying process adopts a high-pressure airless spray gun, the spraying pressure of the high-pressure airless spray gun is 11-25Mpa (for example, any one or a range between 11Mpa, 12Mpa, 15Mpa, 18Mpa, 20Mpa, 21Mpa, 24Mpa and 25 Mpa), and the moving speed is 0.3-1.2m/s (for example, any one or a range between 0.3m/s, 0.4m/s, 0.6m/s, 0.7m/s, 0.8m/s, 1.0Mpa, 1.1m/s and 1.2 m/s); the spraying material of the spraying process is a composition formed by mixing powdery air purification material, high molecular adhesive and water, and the form of the spraying material is a spraying material in the form of paint with fluidity.
The permeable pavement with the air purification function further preferably comprises the following components in parts by weight: 10-20 parts (for example, any one or a range between 10 parts, 12 parts, 15 parts, 16 parts, 17 parts, 19 parts, and 20 parts); a polymer binder, 20-30 parts (e.g., any one or a range between 20 parts, 22 parts, 25 parts, 26 parts, 27 parts, 29 parts, and 30 parts); water, 50-60 parts (e.g., any one or a range between 50 parts, 52 parts, 55 parts, 56 parts, 57 parts, 59 parts, and 60 parts).
The permeable pavement having the air purification function as described above, further preferably, when the material is sprayed on the upper layer pavement material in the step 2) by using a spraying process, the spraying pressure is 15-18MPa (for example, any one or a range between 15MPa, 16MPa, 17MPa and 18 MPa);
when the material is sprayed on the existing permeable pavement by adopting a spraying process, the spraying pressure is adjusted according to the surface layer porosity of the existing permeable pavement:
1) the porosity is 10-15%, the spraying pressure is 20-25MPa, and the moving speed is 0.6-0.8 m/s;
2) the porosity is 15-20%, the spraying pressure is 15-20Mpa, and the moving speed is 0.8-1.0 m/s;
3) the porosity is more than 20 percent, the spraying pressure is 11-15MPa, and the moving speed is 1.0-1.2 m/s.
The spraying thickness is more than 1 μm.
Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:
1. the water seepage pavement with the air purification function, prepared by the invention, has the advantages of simple process, easy operation and low raw material cost, and is suitable for industrial production.
2. The basalt fibers with good compatibility with cement are interwoven in the pavement material, so that the strength of the water seepage pavement can be obviously improved, and the water seepage rate cannot be influenced.
3. The air purification material is added into the pavement material, and the water seepage pavement has a multi-gap characteristic, so that the air purification material can adsorb pollutants (such as automobile exhaust) through adsorption, and can decompose the pollutants under the irradiation of visible light and ultraviolet rays, and therefore, the water seepage and air purification functions can be simultaneously met.
4. The formaldehyde removal rate of the water seepage pavement prepared by the method reaches 65 percent within 24 hoursThe removal rate of PM2.5 is more than 45%, and the removal rate of oxynitride is more than 90%; the 28-day compressive strength of the water seepage pavement reaches more than 50MPa, and the water seepage capacity reaches 200L/(m)2Min) above.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
Example 1
A preparation method of a water seepage road surface with an air purification function comprises the following steps:
1) firstly, preparing a lower layer pavement material, weighing 80kg of coarse aggregate with the grain diameter of 12-15mm, 20kg of 42.5-grade portland cement, 1kg of 10mm chopped basalt fiber and 25kg of water according to the required proportion in the lower layer pavement, mixing, stirring uniformly in a sand mixer to obtain lower layer pavement slurry, and uniformly coating the lower layer pavement slurry on a base pavement with the coating thickness of 100 mm.
2) Curing and solidifying the lower layer pavement at normal temperature, then preparing an upper layer pavement material, and weighing the raw materials according to the required proportion in the upper layer pavement;
the air purification material of the embodiment consists of 2.75kg of nano titanium dioxide, 0.55kg of nano zinc oxide, 0.275kg of activated carbon, 0.55kg of hydrogen mordenite, 0.55kg of activated alumina, 0.275kg of diatomite and 0.055kg of MOF material ZIF-8 (the total weight is 5 kg); mixing and stirring the materials uniformly for later use;
uniformly mixing 5kg of uniformly mixed air purification material with a high molecular binder (bisphenol A type epoxy resin 9kg) to obtain a composition, then mixing the composition with 80kg of coarse aggregate with the particle size of 5-9mm, 2kg of 5mm short-cut basalt fiber and 2kg of colorant (chrome yellow), uniformly stirring in a sand mixer to obtain upper layer pavement slurry, and uniformly coating the upper layer pavement slurry on the lower layer pavement material in the step 1) to obtain the coating thickness of 40 mm. And curing at normal temperature to form the product.
Example 2
A preparation method of a water seepage road surface with an air purification function comprises the following steps:
1) firstly, preparing a lower layer pavement material, weighing 80kg of coarse aggregate with the grain diameter of 12-15mm, 18kg of 42.5-grade portland cement, 2kg of 10mm chopped basalt fiber and 18kg of water according to the required proportion in the lower layer pavement, mixing, stirring uniformly in a sand mixer to obtain lower layer pavement slurry, and uniformly coating the lower layer pavement slurry on a base layer pavement with the coating thickness of 90 mm.
2) Curing and solidifying the lower layer pavement at normal temperature, then preparing an upper layer pavement material, weighing the raw materials according to the required proportion in the upper layer pavement,
the air purification material in the embodiment consists of 1.8kg of nano titanium dioxide, 1.08kg of nano zinc oxide, 0.18kg of activated carbon, 0.36kg of hydrogen mordenite, 0.36kg of activated alumina, 0.18kg of diatomite and 0.036kg of MOF material ZIF-8; mixing and stirring the materials uniformly for later use;
the polymer binder in this example is composed of 8kg of bisphenol a epoxy resin, 2kg of polyurethane resin, and 2kg of acrylic resin; mixing and stirring the materials uniformly for later use;
firstly, uniformly mixing 4kg of prepared air purification material and 10kg of polymer binder to obtain a composition, then mixing the composition with 85kg of coarse aggregate with the particle size of 5-9mm, 2kg of chopped basalt fiber with the particle size of 5mm and 4kg of colorant (chrome yellow), uniformly stirring in a sand mixer to obtain upper-layer pavement slurry, and uniformly coating the upper-layer pavement slurry on the lower-layer pavement material in the step 1) to obtain the coating thickness of 45 mm. And curing at normal temperature to form the product.
Example 3
A preparation method of a water seepage road surface with an air purification function comprises the following steps:
1) firstly, preparing a lower-layer pavement material, weighing 85kg of coarse aggregate with the grain size of 12-15mm, 20kg of 42.5-grade portland cement, 1kg of 10mm chopped basalt fiber and 25kg of water according to the required proportion in the lower-layer pavement, mixing, uniformly stirring in a sand mixer to obtain lower-layer pavement slurry, and uniformly coating the lower-layer pavement slurry on a base pavement with the coating thickness of 110 mm;
2) curing and solidifying the lower layer pavement at normal temperature, then preparing an upper layer pavement material, weighing the raw materials according to the required proportion in the upper layer pavement,
firstly, uniformly mixing 20kg of air purification material (nano titanium dioxide) and 9kg of high molecular binder (acrylic resin) to obtain a composition, then mixing the composition with 80kg of coarse aggregate with the particle size of 5-9mm, 2kg of chopped basalt fiber with the particle size of 5mm and 1kg of colorant (molybdenum chromium bright red), uniformly stirring in a sand mixer to obtain upper pavement slurry, and uniformly coating the upper pavement slurry on the lower pavement material in the step 1) to obtain the coating thickness of 30 mm. And curing at normal temperature to form the product.
The properties of the water permeable pavements prepared in the above examples 1, 2 and 3 are shown in the following table 1.
TABLE 1 Properties of permeable pavement according to examples 1-3
| Categories | Example 1 | Example 2 | Example 3 |
| The porosity (%) of the upper pavement is 15-20 | 18 | 20 | 16 |
| Porosity (%) of the underlying pavement of 20 to 25 | 20 | 25 | 23 |
| Removal ratio of Formaldehyde in 24h (%) | 75 | 80 | 78 |
| The removal rate of PM2.5 within 24h reaches (%) | 45 | 50 | 48 |
| The removal rate of the oxynitride within 24h reaches (%) | 95 | 98 | 96 |
| 28 days compressive strength (MPa) of road surface | 55 | 60 | 62 |
| Road surface water permeability L/(m)2·min) | 210 | 215 | 207 |
As can be seen from the data in Table 1, the water permeable pavements of examples 1-3 of the present invention have formaldehyde removal rates of up to 80% (75% minimum) within 24h, PM2.5 removal rates of 50% (45% minimum) and nitrogen oxide removal rates of 98% (95% minimum) within 24h, and it can be seen that the water permeable pavements of the present invention have formaldehyde removal rates of up to 80% (95% minimum)The water road surface can have very good air purification ability. In addition, the 28-day compressive strength of the water seepage road surface of the embodiment 1-3 of the invention reaches 62MPa (the lowest 55MPa), and the requirement of the road surface strength of a motor way can be completely met; and the water permeability of the road surface reaches 215L/(m)2Min) (minimum 207L/(m)2Min)), it can be seen that the water-permeated paths of examples 1-3 of the present invention have a strong water-absorbing ability.
Example 4
The water permeable pavement prepared in example 3 is subjected to spraying process treatment after being molded, that is, the upper pavement in example 3 is subjected to spraying process treatment after being molded.
The spraying process adopts a high-pressure airless spray gun, the spraying material of the spraying process is a composition formed by mixing powdery air purification material, high-molecular adhesive and water, and the form of the spraying material is a spraying material in the form of coating with fluidity.
The air purification material in the spray coating material in the embodiment comprises the following components: 11kg of nano titanium dioxide, 2.2kg of nano zinc oxide, 1.1kg of activated carbon, 2.2kg of hydrogen mordenite, 2.2kg of activated alumina, 1.1kg of diatomite and 0.22kg of MOF material ZIF-8. Then weighing all the raw materials according to the required proportion and mixing for use.
The components of the high molecular adhesive in the spray material in this example are: 21.2kg of bisphenol A epoxy resin, 3.53kg of polyurethane and 5.3kg of acrylic resin. Then weighing all the raw materials according to the required proportion and mixing for use.
The spray coating material in the embodiment comprises the following components: 20kg of air purifying material, 30kg of high molecular adhesive and 60kg of water. Weighing the raw materials according to the required proportion, and mixing the raw materials to form the spraying material.
When the spraying material prepared by the spraying process is sprayed, the spraying pressure of the high-pressure airless spray gun is 18MPa, the moving speed is 0.3m/s, and the spraying thickness is more than 1 mu m.
Example 5
The water permeable pavement prepared in example 3 is subjected to spraying process treatment after being molded, that is, the upper pavement in example 3 is subjected to spraying process treatment after being molded.
The spraying process adopts a high-pressure airless spray gun, the spraying material of the spraying process is a composition formed by mixing powdery air purification material, high-molecular adhesive and water, and the form of the spraying material is a spraying material in the form of coating with fluidity.
The air purification material in the spray coating material in the embodiment comprises the following components: 11kg of nano titanium dioxide, 2.2kg of nano zinc oxide, 1.1kg of activated carbon, 2.2kg of hydrogen mordenite, 2.2kg of activated alumina, 1.1kg of diatomite and 0.22kg of MOF material ZIF-8. Then weighing all the raw materials according to the required proportion and mixing for use.
The components of the high molecular adhesive in the spray material in this example are: 21.2kg of bisphenol A epoxy resin, 3.53kg of polyurethane and 5.3kg of acrylic resin. Then weighing all the raw materials according to the required proportion and mixing for use.
The spray coating material in the embodiment comprises the following components: 15kg of air cleaning material, 22kg of polymer binder and 55kg of water. Weighing the raw materials according to the required proportion, and mixing the raw materials to form the spraying material.
When the spraying material prepared by the spraying process is sprayed, the spraying pressure of the high-pressure airless spray gun is 15MPa, the moving speed is 0.8m/s, and the spraying thickness is more than 1 mu m.
Example 6
The water permeable pavement prepared in example 3 is subjected to spraying process treatment after being molded, that is, the upper pavement in example 3 is subjected to spraying process treatment after being molded.
The spraying process adopts a high-pressure airless spray gun, the spraying material of the spraying process is a composition formed by mixing powdery air purification material, high-molecular adhesive and water, and the form of the spraying material is a spraying material in the form of coating with fluidity.
The air purification material in the spray coating material in the embodiment comprises the following components: 11kg of nano titanium dioxide, 2.2kg of nano zinc oxide, 1.1kg of activated carbon, 2.2kg of hydrogen mordenite, 2.2kg of activated alumina, 1.1kg of diatomite and 0.22kg of MOF material ZIF-8. Then weighing all the raw materials according to the required proportion and mixing for use.
The components of the high molecular adhesive in the spray material in this example are: 21.2kg of bisphenol A epoxy resin, 3.53kg of polyurethane and 5.3kg of acrylic resin. Then weighing all the raw materials according to the required proportion and mixing for use.
The spray coating material in the embodiment comprises the following components: 12kg of air cleaning material, 28kg of polymer binder and 52kg of water. Weighing the raw materials according to the required proportion, and mixing the raw materials to form the spraying material.
When the spraying material prepared by the spraying process is sprayed, the spraying pressure of the high-pressure airless spray gun is 16MPa, the moving speed is 1.0m/s, and the spraying thickness is more than 1 mu m.
Example 7
The existing permeable pavement (the pavement with the porosity of more than 20 percent) is directly treated by spraying materials through a spraying process.
The spraying process adopts a high-pressure airless spray gun, the spraying material of the spraying process is a composition formed by mixing powdery air purification material, high-molecular adhesive and water, and the form of the spraying material is a spraying material in the form of coating with fluidity.
The spray coating material in the embodiment comprises the following components: 30kg of nano titanium dioxide, 25kg of polyurethane adhesive and 60kg of water. Weighing the raw materials according to the required proportion, and mixing the raw materials to form the spraying material.
When the spraying material prepared by the spraying process is sprayed, the spraying pressure of the high-pressure airless spray gun is 11MPa, the moving speed is 0.8m/s, and the spraying thickness is more than 1 mu m.
The properties of the water permeable pavements prepared in the above examples 4 to 7 are shown in the following table 2.
Table 2 properties of water permeable pavement of examples 4-7
| Categories | Example 4 | Example 5 | Example 6 | Example 7 |
| Removal ratio of Formaldehyde in 24h (%) | 82 | 85 | 83 | 70 |
| The removal rate of PM2.5 within 24h reaches (%) | 50 | 52 | 54 | 46 |
| The removal rate of the oxynitride within 24h reaches (%) | 97 | 98 | 98 | 92 |
| Road surface water permeability L/(m)2·min) | 215 | 218 | 210 | 203 |
As can be seen from the data in Table 2, in the examples 4-6 of the present invention, the air purification material is sprayed on the water permeable pavements prepared by the present invention, the formaldehyde removal rate of the water permeable pavements within 24h is up to 85% (the lowest is 82%), and the PM2.5 removal rate is 54% (the lowest is 82%)52 percent of nitrogen oxide removal rate and 98 percent of nitrogen oxide removal rate (the minimum is 97 percent), so that the method for spraying the air purification material on the water seepage path can have very good air purification capacity. And the water permeability of the road surface reaches 218L/(m)2Min) (minimum 210L/(m)2Min)), it can be seen that the water-permeated paths of examples 4-6 of the present invention have a strong water-absorbing ability. Example 7 is to spray an air purification material on the existing permeable pavement, and it can be known from the above properties that spraying air purification on the existing permeable pavement can achieve a good air purification capability to some extent, but the beneficial effects achieved are still not as good as those achieved by spraying air purification on the permeable pavement prepared by the present invention.
According to the above, the present invention brings the following beneficial technical effects:
1. the water seepage pavement with the air purification function, prepared by the invention, has the advantages of simple process, easy operation and low raw material cost, and is suitable for industrial production.
2. The basalt fibers with good compatibility with cement are interwoven in the pavement material, so that the strength of the water seepage pavement can be obviously improved, and the water seepage rate cannot be influenced.
3. The air purification material is added into the pavement material, and the permeable pavement has a multi-gap characteristic, and the air purification material can decompose pollutants under the irradiation of visible light and ultraviolet rays through adsorption, so that the permeable pavement material can simultaneously meet the functions of water permeability and air purification.
4. The removal rate of formaldehyde, PM2.5 and oxynitride in 24 hours of the prepared water seepage pavement reaches more than 65%, 45% and 90% respectively; the 28-day compressive strength of the water seepage pavement reaches more than 50MPa, and the water seepage capacity reaches 200L/(m)2Min) above.
The data in tables 1 and 2 show that the air purification function and the water seepage function of the water seepage road surface prepared by the technical scheme of the invention are superior to the performance obtained by directly spraying the air purification coating on the existing road surface, and the air purification function and the water seepage function of the water seepage road surface prepared by the invention are superior to the performance obtained by directly spraying the air purification coating on the existing water seepage road surface without spraying the air purification coating. The invention further shows that the water seepage pavement with the air purification function effectively solves the problems that the existing water seepage pavement is low in water seepage rate and does not have the air purification function, and the water seepage pavement is simple in process, easy to operate, low in raw material cost, suitable for industrial production and widely applicable.
The above description is only exemplary of the invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the invention is intended to be covered by the appended claims.
Claims (5)
1. The water seepage road surface with the air purification function is characterized by comprising an upper layer road surface and a lower layer road surface;
the upper layer pavement comprises the following raw materials in parts by weight: 5-95 parts of coarse aggregate; 1-5 parts of basalt fiber; 1-10 parts of a high-molecular binder; 1-5 parts of a colorant; 1-5 parts of air purification material; the grain size of the coarse aggregate is 5-9 mm; the basalt fibers are chopped basalt fibers; the high-molecular binder consists of bisphenol A epoxy resin, polyurethane resin and acrylic resin; and the macromolecular binder comprises the following components in parts by weight: 60-80 parts of bisphenol A type epoxy resin; 10-20 parts of polyurethane resin; 10-20 parts of acrylic resin;
the air purification material comprises nano titanium dioxide, nano zinc oxide, MOF material, activated carbon, molecular sieve, activated alumina, activated carbon fiber and diatomite; and the air purification material comprises the following components in parts by weight: 20-50 parts of nano titanium dioxide; 10-30 parts of nano zinc oxide; 1-5 parts of MOF material; 5-10 parts of activated carbon; 10-25 parts of a molecular sieve; 10-20 parts of activated alumina; 5-10 parts of diatomite;
the lower layer pavement comprises the following raw materials in parts by weight: 1-20 parts of inorganic adhesive; 1-90 parts of coarse aggregate; 1-5 parts of basalt fiber; 8-25 parts of water; the inorganic binder is Portland cement; the grain size of the coarse aggregate is 12-15 mm; the basalt fibers are chopped basalt fibers.
2. The water permeable pavement having an air purifying function according to claim 1,
the nano titanium dioxide is anatase carbon dioxide;
the particle sizes of the nano titanium dioxide, the nano zinc oxide and the MOF material are all 20-50 nm;
the particle sizes of the active carbon, the active alumina, the active carbon fiber and the diatomite are all less than 30 mu m;
the particle size of the molecular sieve is less than 50 μm; and the molecular sieve is one or more of hydrogen mordenite, hydrogen saponated zeolite, dealuminized mordenite and BX type molecular sieve;
the MOF material is any one or more of ZIF-8, ZIF-67 and Ni-ZIF-8.
3. The water permeable pavement having an air cleaning function according to claim 1, wherein in the upper pavement, the coloring agent is an inorganic pigment; the basalt fibers are 5mm chopped basalt fibers;
in the underlying pavement, the inorganic binder is 42.5-grade portland cement; the basalt fiber is 10mm chopped basalt fiber.
4. The water permeable pavement with the air purification function of claim 1, wherein the thickness of the upper pavement is 25-45mm, and the porosity of the upper pavement is 15-20%;
the thickness of the lower layer pavement is 50-110mm, and the porosity of the lower layer pavement is 20-25%.
5. A method for preparing the water permeable pavement with the air purification function according to any one of claims 1 to 4, wherein the method comprises the following steps:
1) firstly, preparing a lower-layer pavement material, weighing an inorganic adhesive, coarse aggregates, basalt fibers and water according to the required proportion in the lower-layer pavement, mixing, uniformly stirring to obtain lower-layer pavement slurry, and uniformly coating the lower-layer pavement slurry on a base pavement, wherein the coating thickness is 50-110 mm;
2) preparing an upper layer pavement material, weighing the raw materials according to the required proportion in the upper layer pavement, uniformly mixing an air purification material and a high polymer binder to obtain a composition, then mixing the composition with coarse aggregates, basalt fibers and a colorant, uniformly stirring to obtain upper layer pavement slurry, and uniformly coating the upper layer pavement slurry on the lower layer pavement material in the step 1) to obtain the coating thickness of 25-45 mm;
treating the upper layer of pavement material in the step 2) or the existing permeable pavement directly by adopting a spraying process;
the spraying process adopts a high-pressure airless spray gun, the spraying pressure of the high-pressure airless spray gun is 11-25Mpa, and the moving speed is 0.3-1.2 m/s;
the spraying material of the spraying process is a composition formed by mixing powdery air purification material, high-molecular adhesive and water, and the form of the spraying material is a sprayable material in the form of coating with fluidity;
the spraying material comprises the following components in parts by weight: 10-20 parts of air purification material; 20-30 parts of a high-molecular adhesive; 50-60 parts of water.
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| CN108821690B (en) * | 2018-07-20 | 2021-11-12 | 北京工业大学 | Preparation method of MOF high-performance concrete with high strength and small shrinkage |
| CN109400068A (en) * | 2018-11-24 | 2019-03-01 | 深圳市康利达再生资源有限公司 | The environment friendly pervious brick and its manufacturing method of high-efficient purification air |
| CN113979693B (en) * | 2021-11-16 | 2022-10-21 | 绍兴职业技术学院 | Permeable pavement material capable of degrading automobile exhaust and prepared based on urban construction waste and preparation method thereof |
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