CN107032660B - Preparation method of composite material for paving permeable pavement - Google Patents
Preparation method of composite material for paving permeable pavement Download PDFInfo
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- CN107032660B CN107032660B CN201611013680.6A CN201611013680A CN107032660B CN 107032660 B CN107032660 B CN 107032660B CN 201611013680 A CN201611013680 A CN 201611013680A CN 107032660 B CN107032660 B CN 107032660B
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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
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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
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/06—Acrylates
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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
- C04B26/26—Bituminous materials, e.g. tar, pitch
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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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- 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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- 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
- E01C7/00—Coherent pavings made in situ
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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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- Chemical & Material Sciences (AREA)
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Abstract
The invention belongs to the technical field of civil engineering, and relates to a permeable pavement structure, which is used for the field of paving roads in coastal cities or paving roads after sea reclamation, solves the problem of sinking of the pavement caused by seawater erosion in the traditional steel slag pavement, also solves the problem of treating wastes, realizes the hardening of the road and prolongs the service life of the road, and the pavement structure sequentially comprises a cushion layer, a permeable layer, a base layer, a leveling layer and a surface layer from bottom to top; the base layer is paved with the composite material, the main raw materials of the composite material comprise aggregate, coal cinder, fly ash, medium sand, clay powder and a binder, and the composite material is reasonable in structure, strong in water permeability, corrosion-resistant, low in cost, environment-friendly in application, long in service life, low in road maintenance cost, and good in economic benefit and market prospect.
Description
The technical field is as follows:
the invention belongs to the technical field of civil engineering material preparation, and relates to a preparation method of a composite material for paving a permeable pavement, which is used for road paving occasions after coastal urban roads are paved or sea reclamation is carried out.
Background art:
the sea reclamation land is actually a sea reclamation land, and a certain area of the beach is enclosed and then filled. Coastal reclamation generally takes two forms, one is reclamation associated with continental coasts, known as "shoal"; and secondly, the island is suspended in shallow sea to form an artificial island. In the land reclamation of the enclosed sea connected with the continents, two enclosure ways are provided, namely, the direct embankment enclosure on the mudflat outside the shore line; and secondly, the materials for filling the sea, except for filling the soil with the mountain rocks, are filled with a great amount of dredged mud serving as a filler to replace good sandy soil and the like to be used as geotechnical materials, so that the influence of the waste sludge on the environment is reduced, and a new geotechnical material resource is generated. Except for the construction of an initial cofferdam and the covering of a small amount of mellow soil in the later period, a land-based clay gravel is basically not required to be taken in the process of newly building land, a tugboat and a dredger are utilized to operate in the sea, the cofferdam is built firstly, then a harbor basin is built by sucking and blowing sand, the enclosed sea area is filled with silt, then a tide-blocking dam is built, and the height, the structure and the section form of the dam are determined according to the factors such as topographic and geological conditions, the highest tide level, the wave height, the climbing height and the like. Even if the land built by sea reclamation is not used for producing grains or freshwater aquaculture, some water channels are dug in the buried mud flat, an inner dike is built, and an infiltration intercepting ditch is dug on the inner side of the dike, so that salt is prevented from being continuously supplied to a landfill area by seawater, the flow of saline water and freshwater is gradually divided, the soil desalination and the groundwater desalination are accelerated, otherwise, the underground steel structure and the cement part of the built building structure are seriously corroded. Despite the measures, the traditional road paving mode is not suitable for road paving after sea reclamation and the paving occasions of coastal urban roads.
In the prior art, a chinese patent CN103864370B discloses a steel slag waste rubber foundry waste sand road material and a preparation and paving method thereof, the material comprises a road base layer and a road surface layer, the road base layer is made of the following raw materials by weight percentage: 36-58% of steel slag, 8-12% of waste rubber particles, 5-36% of casting waste sand, 15-35% of consolidation agent, and the road surface layer is prepared from the following raw materials in parts by weight: 22-55% of steel slag, 8-18% of waste rubber powder, 5-35% of foundry waste sand and 3-15% of consolidation agent, the technical scheme is that the steel slag, the waste rubber and the foundry waste sand which pollute the environment are prepared into a road material, the strength of the road material is improved by utilizing the strengthening effect of the foundry waste sand, the rigidity of the road material is reduced by utilizing the strengthening effect of the foundry waste sand, the cracking resistance and the driving comfort of the road material are improved, meanwhile, natural broken stone is replaced by the steel slag, the economic cost of the road material is reduced, and the remarkable social and economic benefits are achieved.
The invention content is as follows:
the invention aims to overcome the defects in the prior art, and seeks to design a preparation method of a composite material for paving a permeable pavement, solve the problem of sinking or cracking of the pavement caused by seawater erosion, realize road hardening and prolong the service life of the road.
In order to realize the aim, the concrete preparation process steps of the composite material for paving the permeable pavement comprise the following steps:
(1) firstly, soaking one or any combination of oyster shells, scallop shells and conch shells in hydrogen peroxide for 2-4 hours, cleaning to remove rotten meat, washing for 3-5 times by using industrial water, naturally drying, crushing the shells by using a first-stage hammer-crushing type crusher, crushing the shells into particles by using a crusher, screening by using a circular vibration screening machine, selecting the particles with the particle size of less than 2.36mm for later use, returning large blocks with the particle size not meeting the requirement to a second-stage hammer-crushing type crusher through a conveying belt for re-crushing, conveying the particles with the particle size meeting the requirement to a finished product area by using a belt conveyor, and then conveying to the site for later use;
(2) collecting fly ash from flue gas generated after coal combustion, and taking dry fly ash with the water content of 0.18 percent, the ignition loss of 1.72 percent, the sulfur trioxide content of 0.11 percent and the fineness of 0.045mm for later use;
(3) screening the medium sand with the grain diameter of 0.25-0.5mm by using a screen mesh for later use;
(4) adopting epoxy resin or acrylic resin as a binder;
(5) then mixing the raw materials according to the weight parts of 35-60 parts of aggregate, 20-45 parts of fly ash, 12-16 parts of medium sand, 5-10 parts of clay powder and 10-15 parts of binder, wherein the aggregate is shell particles of one or any combination of oyster shell, scallop shell and conch shell, and the particle size is less than 2.36 mm; adding appropriate amount of water into a stirrer, adding the raw material mixture into the stirrer, adding water again, adding water twice with a water content of not more than 3% of the total mass, uniformly stirring for not less than 3 min, spreading the composite material on a water permeable layer, compacting with a road roller, solidifying after 24-48 h, sprinkling water, and maintaining for 7-10 days, or making the composite material into a water permeable prefabricated member with a mold, and spreading the prefabricated member on the water permeable layer, wherein the thickness is 50-100 mm.
The invention relates to a raw material of composite material for paving permeable pavementThe material comprises 35-60 parts of aggregate, 20-45 parts of fly ash, 12-16 parts of medium sand, 5-10 parts of clay powder and 10-15 parts of binder; the aggregate is shell particles of one or any combination of oyster shell, scallop shell and conch shell, and the particle size is less than 2.36 mm; the fly ash is dry fly ash with the water content of 0.18 percent, the ignition loss of 1.72 percent, the sulfur trioxide content of 0.11 percent and the fineness of 0.045 mm; the binder is epoxy resin or acrylic resin; the composite material has a water content of less than 3%, can be directly paved on a road surface to form a base layer after being uniformly stirred, or can be made into a permeable prefabricated member for paving the road surface or collecting rainwater and filtering water, and the permeability coefficient of the permeable prefabricated member reaches 2.0 multiplied by 10-2cm/s and 22.5-32.5MPa of compressive strength.
The pavement structure paved by the composite material for paving the permeable pavement comprises a cushion layer, a permeable layer, a base layer, a leveling layer and a surface layer from bottom to top in sequence, wherein the cushion layer is paved with stone leftovers of rubble with the thickness of 8-15mm and the particle size of the stone leftovers of rubble with the particle size of less than 2.36 mm; the permeable layer comprises a geotextile gravel bag layer of 5-10mm laid at the bottom, a plastic drainage blind ditch layer laid at the middle and a geotextile gravel bag layer of 100-200mm laid at the upper part, wherein the weight ratio of gravels in the geotextile gravel bag is 4: 1, the gravels are stone leftovers of quartz sand and quarry stones, and the particle sizes of the gravels are all 0.08-1.6 mm; laying a composite material with the thickness of 50-100mm on a base layer, wherein the weight components of the raw materials comprise 35-60 parts of aggregate, 20-45 parts of fly ash, 12-16 parts of medium sand, 5-10 parts of clay powder and 10-15 parts of binder, and the composite material is mixed and stirred uniformly and then directly laid on a road surface to form the base layer, or a water-permeable prefabricated member made of the composite material by a mould is laid on a water-permeable layer; paving a leveling layer with the thickness of 30-50mm on the base layer, wherein the raw materials of the leveling layer comprise lime, medium sand, quarry stone and clay, and the weight ratio of the materials is 10-20:40-50: 80-100: 1, the water permeability coefficient of the leveling layer is more than 2.5 multiplied by 10-2cm/s, wherein the medium sand is water-washed medium sand, the mud content is not more than 3%, the maximum grain size of the chayote is not more than 2/3 of the thickness of the cushion layer, and the mud content is not more than 2%; the paving thickness of the surface layer is 5-10mm, and the material comprises the following components by weight15-25 parts of asphalt, 10-25 parts of ground feather keratin powder, 35-65 parts of fly ash, 5-10 parts of rubber particles and 5-15 parts of paraffin; the paraffin is lignite wax, polymerized wax or glyceride with the freezing point of more than 45 ℃; the particle size of the rubber particles is between 2.6 and 4 mm; the density of the chaetolite powder is more than 2.5t/m3The particle size is less than 0.045 mm; the fly ash is dry fly ash with the water content of 0.18 percent, the ignition loss of 1.72 percent, the sulfur trioxide content of 0.11 percent and the fineness of 0.045 mm.
The concrete paving steps of the composite material for paving the permeable pavement, which is provided by the invention, for paving the pavement comprise:
(1) preparation and construction: before paving a road for sea reclamation, leveling sand, and then tamping the sand by using a heavy-duty circular tamper to form a roadbed; or before the coastal road is paved, the road surface is firstly cleaned and leveled, and then the ground is tamped by a tamping machine to form a roadbed; setting out the line in a planned road area according to design requirements, cleaning an operation field, repeatedly rolling the roadbed by using a press machine until the roadbed is compacted, and completing construction preparation before pavement;
(2) laying a cushion layer: uniformly and flatly paving a layer of stone leftovers of the rubble with the thickness of 8-15mm on the compacted roadbed to form a cushion layer, wherein the maximum grain size of the stone leftovers of the rubble is less than 2.36mm after crushing and screening treatment;
(3) laying a permeable layer: paving a plurality of geotextile bags filled with gravels on the cushion layer to form a geotextile bag layer with the thickness of 5-10mm, paving a plastic drainage blind ditch layer on the geotextile bag layer, connecting the drainage blind ditch into a municipal drainage pipeline, and paving a plurality of geotextile bags filled with the gravels on the drainage blind ditch layer to form a geotextile bag layer with the thickness of 100 and 200 mm; the geotextile bag is made of synthetic fibers of high molecular polymers by needling or weaving and has water permeability; the sandstone is quartz sand and stone leftovers of the quarry stone according to the ratio of 4: 1, the particle size of the stone leftovers of the rubberis is between 0.08 and 1.6 mm;
(4) laying a base layer: secondly, laying a layer of composite material on the uppermost geotextile bag layer to form a base layer with the thickness of 50-100mm, wherein the composite material comprises the following raw materials, by weight, 35-60 parts of aggregate, 20-45 parts of fly ash, 12-16 parts of medium sand, 5-10 parts of clay powder and 10-15 parts of a binder, adding a proper amount of water into a rotating stirrer, sequentially adding the aggregate, the fly ash, the medium sand and the clay powder according to the weight, adding water, uniformly stirring for not less than 3 minutes, laying the composite material on a water permeable layer for 50-100mm, compacting by a road roller, solidifying the composite material after 24-48 hours, watering and maintaining for 7-10 days, or making the composite material into a water permeable prefabricated member by a mold and laying the prefabricated member on the water permeable layer; the aggregate is shell particles of one or any combination of oyster shell, scallop shell and conch shell, and the particle size is less than 2.36 mm;
(5) paving a leveling layer: and paving a leveling layer with the thickness of 30-50mm on the base layer, wherein the raw materials of the leveling layer comprise lime, medium sand, quarry stones and clay powder according to the weight ratio of 10-20:40-50: 80-100: 1, preparation; the water permeability coefficient of the leveling layer is more than 2.5 multiplied by 10-2cm/s; the medium sand is washed medium sand, and the mud content is not more than 3%; the maximum grain size of the chayote is not more than 2/3 of the thickness of the cushion layer, and the mud content is not more than 2%; before laying, firstly, wiring according to a planning diagram to divide sections, then marking the positions of longitudinal contraction joints and transverse contraction joints, wherein the adjacent distance of the longitudinal contraction joints is not more than 6m, then arranging the positions of two-way leveling piers, the height of the leveling piers is the same as the thickness of a leveling layer, the longitudinal distance of the adjacent leveling piers is not more than 2m, then wetting a base layer, then adding a proper amount of water into a rotating stirrer, sequentially adding the quarry stones, lime, medium sand and clay powder according to a preparation ratio, adding water, wherein the sum of the water adding amounts of two times is not more than 3% of the total mass, and stirring for not less than 2 minutes; finally, brushing neutral silicone bonding adhesive on the upper surface of the base layer from one end, spreading mortar while brushing, wherein the laying time is not more than 2 hours, controlling the elevation by using a leveling pier, controlling the virtual pavement thickness to be higher than that of the leveling pier, then, after being vibrated and compacted by a flat plate vibrator, checking the flatness by using the leveling pier as a mark, scraping by using a horizontal scraping bar or rubbing by using a wood trowel, smoothing and press polishing by using an iron trowel, and after laying a leveling layer for 12 hours, sprinkling and maintaining for 7-10 days;
(6) paving a surface layer: finally, 5-fold materials are horizontally laid on the leveling layerA 10mm face layer comprising asphalt, ground granite powder, fly ash, rubber particles and paraffin; it is prepared by 15-25 parts of asphalt, 10-25 parts of ground feather keratin powder, 35-65 parts of fly ash, 5-10 parts of rubber particles and 5-15 parts of paraffin; the paraffin is lignite wax, polymerized wax or glyceride with the freezing point of more than 45 ℃; the particle size of the rubber particles is between 2.6 and 4 mm; the density of the chaetolite powder is more than 2.5t/m3The particle size is less than 0.045 mm; the fly ash is dry fly ash with the water content of 0.18 percent, the ignition loss of 1.72 percent, the sulfur trioxide content of 0.11 percent and the fineness of 0.045 mm; the raw materials are mixed and stirred evenly and then spread on a leveling layer, a horizontal scraping bar is used for scraping or a wood trowel is used for rubbing, after the iron trowel is used for smoothing and press polishing, watering and curing are carried out for 7-10 days, and the pavement of the permeable pavement is completed.
The geotextile is divided into two types of woven geotextile and non-woven geotextile according to the manufacturing method. The general engineering is mainly non-woven geotextile, and the 'cloth roll' generally has the width of 4-6 meters and the length of 50-100 meters. The geotextile has many characteristics, firstly, the strength is high, and because of using the plastic flat filament, the geotextile can keep sufficient strength and extension in a dry and wet state. And the corrosion resistance is realized, and the corrosion resistance can be realized for a long time in soil and water with different pH values. Thirdly, the water permeability is good, and gaps are arranged among the flat wires, so that the water permeability is good. Fourthly, the antimicrobial property is good, and the biological agent is not damaged by microorganisms and worm damage. Fifthly, the construction is convenient, and the material is soft, so that the transportation and the laying are convenient. Therefore, the geotextile has excellent filtering, draining, isolating, reinforcing, seepage-proofing and protecting effects, and has the advantages of light weight, high tensile strength, good permeability, high temperature resistance, freezing resistance, aging resistance and corrosion resistance.
Compared with the prior art, the invention can solve the treatment problem of wastes and the defects of the traditional steel slag pavement, has simple integral preparation process, low cost, energy saving, environmental protection, long service life and low road maintenance cost, and has good economic benefit and market prospect.
Description of the drawings:
fig. 1 is a flow chart of a method for paving a road by using a composite material for paving a permeable pavement according to the invention.
Fig. 2 is a schematic view of the structural principle of the composite material paved road for paving a permeable pavement according to the invention, wherein the composite material paved road comprises a cushion layer 1, a permeable layer 2, a base layer 3, a leveling layer 4 and a surface layer 5.
The specific implementation mode is as follows:
the invention is further illustrated by the following examples in conjunction with the accompanying drawings.
Example 1:
the concrete preparation process steps of the composite material for paving the permeable pavement related by the embodiment are as follows:
(1) firstly, soaking one or any combination of oyster shells, scallop shells and conch shells in hydrogen peroxide for 2-4 hours, cleaning to remove rotten meat, washing for 3-5 times by using industrial water, naturally drying, crushing the shells by using a first-stage hammer-crushing type crusher, crushing the shells into particles by using a crusher, screening by using a circular vibration screening machine, selecting the particles with the particle size of less than 2.36mm for later use, returning large blocks with the particle size not meeting the requirement to a second-stage hammer-crushing type crusher through a conveying belt for re-crushing, conveying the particles with the particle size meeting the requirement to a finished product area by using a belt conveyor, and then conveying to the site for later use;
(2) collecting fly ash from flue gas generated after coal combustion, and taking dry fly ash with the water content of 0.18 percent, the ignition loss of 1.72 percent, the sulfur trioxide content of 0.11 percent and the fineness of 0.045mm for later use;
(3) screening the medium sand with the grain diameter of 0.25-0.5mm by using a screen mesh for later use;
(4) adopting epoxy resin or acrylic resin as a binder;
(5) then, the raw materials comprise 35-60 parts of aggregate, 20-45 parts of fly ash, 12-16 parts of medium sand, 5-10 parts of clay powder and 10-15 parts of binder according to the weight parts, wherein the aggregate is shell particles of one or any combination of oyster shell, scallop shell and conch shell, and the particle size is less than 2.36 mm; adding appropriate amount of water into a stirrer, adding the raw material mixture into the stirrer, adding water again, adding water twice with a water content of not more than 3% of the total mass, uniformly stirring for not less than 3 min, spreading the composite material on a water permeable layer, compacting with a road roller, solidifying after 24-48 h, sprinkling water, and maintaining for 7-10 days, or making the composite material into a water permeable prefabricated member with a mold, and spreading the prefabricated member on the water permeable layer, wherein the thickness is 50-100 mm.
The raw materials of the composite material for paving the permeable pavement comprise 35-60 parts of aggregate, 20-45 parts of fly ash, 12-16 parts of medium sand, 5-10 parts of clay powder and 10-15 parts of binder; the aggregate is shell particles of one or any combination of oyster shell, scallop shell and conch shell, and the particle size is less than 2.36 mm; the fly ash is dry fly ash with the water content of 0.18 percent, the ignition loss of 1.72 percent, the sulfur trioxide content of 0.11 percent and the fineness of 0.045 mm; the binder is epoxy resin or acrylic resin; the composite material has a water content of less than 3%, can be directly paved on a road surface to form a base layer after being uniformly stirred, or can be made into a permeable prefabricated member for paving the road surface or collecting rainwater and filtering water, and the permeability coefficient of the permeable prefabricated member reaches 2.0 multiplied by 10-2cm/s and 22.5-32.5MPa of compressive strength.
Claims (2)
1. A pavement structure paved by composite materials for paving permeable pavements is characterized in that the paved pavement structure sequentially comprises a cushion layer, a permeable layer, a base layer, a leveling layer and a surface layer from bottom to top, wherein the cushion layer is paved by 8-15mm thick stone leftovers of rubble stones with the particle size of less than 2.36 mm; the permeable layer comprises a geotextile gravel bag layer of 5-10mm laid at the bottom, a plastic drainage blind ditch layer laid at the middle and a geotextile gravel bag layer of 100-200mm laid at the upper part, wherein the weight ratio of gravels in the geotextile gravel bag is 4: 1, the gravels are stone leftovers of quartz sand and quarry stones, and the particle sizes of the gravels are all 0.08-1.6 mm; the base layer is paved with a composite material with the thickness of 50-100mm, the weight components of the raw materials are 35-60 parts of aggregate, 20-45 parts of fly ash, 12-16 parts of medium sand, 5-10 parts of clay powder and 10-15 parts of binder, the aggregate is shell particles of one or any combination of oyster shell, scallop shell and conch shell, and the particle size is less than 2.36 mm; the binder is epoxy resin or acrylic resin; mixing and stirring the composite material uniformly, and then directly paving the mixture on the road surface to form a base layer, or preparing the composite material into a transparent material by using a moldThe water prefabricated member is flatly paved on the permeable layer; paving a leveling layer with the thickness of 30-50mm on the base layer, wherein the raw materials of the leveling layer comprise lime, medium sand, quarry stone and clay, and the weight ratio of the materials is 10-20:40-50: 80-100: 1, the water permeability coefficient of the leveling layer is more than 2.5 multiplied by 10-2cm/s, wherein the medium sand is water-washed medium sand, the mud content is not more than 3%, the maximum grain size of the chayote is not more than 2/3 of the thickness of the cushion layer, and the mud content is not more than 2%; the paving thickness of the surface layer is 5-10mm, and the material is prepared by 15-25 parts of asphalt, 10-25 parts of ground feather keratin powder, 35-65 parts of fly ash, 5-10 parts of rubber particles and 5-15 parts of paraffin according to the weight components; the paraffin wax is montan wax, polymer wax or glyceride with the freezing point of more than 45 ℃; the particle size of the rubber particles is between 2.6 and 4 mm; the density of the chaetolite powder is more than 2.5t/m3The particle size is less than 0.045 mm; the fly ash is dry fly ash with the water content of 0.18 percent, the ignition loss of 1.72 percent, the sulfur trioxide content of 0.11 percent and the fineness of 0.045 mm.
2. The pavement structure laid with the composite material for permeable pavement according to claim 1, wherein the concrete pavement step of laying the pavement comprises:
(1) preparation and construction: before paving a road for sea reclamation, leveling sand, and then tamping the sand by using a heavy-duty circular tamper to form a roadbed; or before the coastal road is paved, the road surface is firstly cleaned and leveled, and then the ground is tamped by a tamping machine to form a roadbed; setting out the line in a planned road area according to design requirements, cleaning an operation field, repeatedly rolling the roadbed by using a press machine until the roadbed is compacted, and completing construction preparation before pavement;
(2) laying a cushion layer: uniformly and flatly paving a layer of stone leftovers of the rubble with the thickness of 8-15mm on the compacted roadbed to form a cushion layer, wherein the maximum grain size of the stone leftovers of the rubble is less than 2.36mm after crushing and screening treatment;
(3) laying a permeable layer: paving a plurality of geotextile sand-stone bags filled with sand stones on the cushion layer to form a geotextile sand-stone bag layer with the thickness of 5-10mm, paving a plastic drainage blind ditch layer on the geotextile sand-stone bag layer, connecting the drainage blind ditch into a municipal drainage pipeline, and paving a plurality of geotextile sand-stone bags filled with sand stones on the drainage blind ditch layer to form a geotextile sand-stone bag layer with the thickness of 100 and 200 mm; the geotextile sandbag is made of geotextile, is made of synthetic fibers of high polymer as a raw material, and has water permeability; the sandstone is quartz sand and stone leftovers of the quarry stone according to the ratio of 4: 1, the particle size of the stone leftovers of the rubberis is between 0.08 and 1.6 mm;
(4) laying a base layer: secondly, paving a layer of composite material on the uppermost geotextile sandstone bag layer to form a base layer with the thickness of 50-100mm, wherein the composite material comprises the following raw materials, by weight, 35-60 parts of aggregate, 20-45 parts of fly ash, 12-16 parts of medium sand, 5-10 parts of clay powder and 10-15 parts of a binder, proper amount of water is added into a rotating stirrer, then the aggregate, the fly ash, the medium sand and the clay powder are sequentially added according to the weight, water is added, the sum of the water adding amounts of the two times does not exceed 3% of the total mass, the uniform stirring is carried out for not less than 3 minutes, the composite material is paved on a water permeable layer for 50-100mm, the composite material is compacted by a road roller, the composite material is solidified after 24-48 hours, the water is sprinkled for curing for 7-10 days, or the composite material is made into a water permeable prefabricated member by a; the aggregate is shell particles of one or any combination of oyster shell, scallop shell and conch shell, and the particle size is less than 2.36 mm;
(5) paving a leveling layer: and paving a leveling layer with the thickness of 30-50mm on the base layer, wherein the raw materials of the leveling layer comprise lime, medium sand, quarry stones and clay powder according to the weight ratio of 10-20:40-50: 80-100: 1, preparation; the water permeability coefficient of the leveling layer is more than 2.5 multiplied by 10 < -2 > cm/s; the medium sand is washed medium sand, and the mud content is not more than 3%; the maximum grain size of the chayote is not more than 2/3 of the thickness of the cushion layer, and the mud content is not more than 2%; before laying, firstly, wiring according to a planning diagram to divide sections, then marking the positions of longitudinal contraction joints and transverse contraction joints, wherein the adjacent distance of the longitudinal contraction joints is not more than 6m, then arranging the positions of two-way leveling piers, the height of the leveling piers is the same as the thickness of a leveling layer, the longitudinal distance of the adjacent leveling piers is not more than 2m, then wetting a base layer, then adding a proper amount of water into a rotating stirrer, sequentially adding the quarry stones, lime, medium sand and clay powder according to a preparation ratio, adding water, wherein the sum of the water adding amounts of two times is not more than 3% of the total mass, and stirring for not less than 2 minutes; finally, brushing neutral silicone bonding adhesive on the upper surface of the base layer from one end, spreading mortar while brushing, wherein the laying time is not more than 2 hours, controlling the elevation by using a leveling pier, controlling the virtual pavement thickness to be higher than that of the leveling pier, then, after being vibrated and compacted by a flat plate vibrator, checking the flatness by using the leveling pier as a mark, scraping by using a horizontal scraping bar or rubbing by using a wood trowel, smoothing and press polishing by using an iron trowel, and after laying a leveling layer for 12 hours, sprinkling and maintaining for 7-10 days;
(6) paving a surface layer: finally, horizontally paving a surface layer of 5-10mm on the leveling layer, wherein the surface layer comprises asphalt, rubberstone powder, fly ash, rubber particles and paraffin; it is prepared by 15-25 parts of asphalt, 10-25 parts of ground feather keratin powder, 35-65 parts of fly ash, 5-10 parts of rubber particles and 5-15 parts of paraffin; the paraffin is lignite wax, polymerized wax or glyceride with the freezing point of more than 45 ℃; the particle size of the rubber particles is between 2.6 and 4 mm; the density of the chaetolite powder is more than 2.5t/m3The particle size is less than 0.045 mm; the fly ash is dry fly ash with the water content of 0.18 percent, the ignition loss of 1.72 percent, the sulfur trioxide content of 0.11 percent and the fineness of 0.045 mm; mixing and stirring the raw materials uniformly, paving the mixture on a leveling layer, leveling the mixture by using a horizontal scraping bar or rubbing the mixture by using a wood trowel, and after the iron trowel is leveled and polished, sprinkling water for curing for 7 to 10 days to finish the pavement of the permeable pavement; the pavement paved by the composite material has high strength, corrosion resistance, good water permeability, good antimicrobial property, high temperature resistance and freezing resistance.
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| CN109704736A (en) * | 2019-01-18 | 2019-05-03 | 广东海洋大学 | A kind of ecological brick for purifying water and preparation method thereof and water purifying device |
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