CN110485237A - A kind of production method of fabricated permeable pavement concrete slab - Google Patents
A kind of production method of fabricated permeable pavement concrete slab Download PDFInfo
- Publication number
- CN110485237A CN110485237A CN201910625855.6A CN201910625855A CN110485237A CN 110485237 A CN110485237 A CN 110485237A CN 201910625855 A CN201910625855 A CN 201910625855A CN 110485237 A CN110485237 A CN 110485237A
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- concrete
- concrete slab
- matts
- recessed portion
- fabricated
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
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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
-
- 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
- E01C15/00—Pavings specially adapted for footpaths, sidewalks or cycle tracks
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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
- E01C5/00—Pavings made of prefabricated single units
- E01C5/22—Pavings made of prefabricated single units made of units composed of a mixture of materials covered by two or more of groups E01C5/008, E01C5/02 - E01C5/20 except embedded reinforcing materials
Abstract
The invention discloses a kind of production methods of fabricated permeable pavement concrete slab, mold is made first, the mould upstream is template cavity, bottom is equipped with matts recessed portion, screw shell of the embedment as hole for hoist in matts recessed portion, pouring reinforcement concrete in matts recessed portion, then surface after the completion of casting reinforced concrete, the polyphenylene sulfide resin lotion of sprinkling finally completes pouring for subsequent pervious concrete in the top template cavity of mold.Fabricated permeable pavement concrete slab of the invention can be fabricated to the bigger size of more existing paving brick, existing pavement facing brick paving skid resistance can be improved and flatness is insufficient, achieve the purpose that rainwater permeate in time, comfortable and panel durability of walking it is strong, and pavement process is rapid in construction, base's surface layer is not necessarily to conditioned time, and open to traffic immediately is completed in construction.
Description
Technical field
The present invention relates to a kind of production methods of fabricated permeable pavement concrete slab, belong to road engineering technology neck
Domain.
Background technique
With Urbanization Progress, a large amount of road construction projects are located at densely populated, heavy traffic region, at present road surface
Layer, base layer construction are all that scene paves construction, construct, curing cycle it is longer, keep the traffic pressure of construction period peripheral path rapid
Increase, and ambient enviroment is produced bigger effect, including fugitive dust and noise problem.Meanwhile in huge highway and urban road,
Annual a large amount of road is needed repairing, reinforces or is widened, this can bring very big inconvenience to daily traffic, break off a friendship, not only can detour
Traffic disturbance is caused, but also will cause user's delay time at stop and unnecessary fuel consumption.Therefore, it creates, reconstruct and extends
In road engineering, it is desirable that guarantee to shorten the construction period as far as possible under the premise of quality, minimal interference traffic.
Assembled technology has that component standardization, on-site construction time be short, environment influences small characteristic, building, bridge,
It has been promoted and applied in the engineerings such as tunnel.Using prefabrication, field erected large size prefabricated part pavement pavement technique by
Growing interest, quick with work progress, environmental perturbation is small, and construction quality is easily controllable, and durability smaller size brick is more excellent
The features such as.Prefabricated assembled technology has some researchs and application on driveway, but grinds in complicated mating formation for pavement
Study carefully less.Due to that need to guarantee walking comfort, the pre-assembled formula technology on pavement need to consider antiskid and permeable effect, therefore use
Prefabricated pervious concrete is the optimal selection of tradeoff.
Summary of the invention
The present invention is the rapid and spongeization realizing pavement and mating formation, and the object of the present invention is to provide a kind of assembled is saturating
The production method of water pavement concrete slab can make more nervous or to the smaller situation of environmental perturbation requirement in construction period
Under, rapid construction is carried out, in use, rainwater, which penetrates, penetrates into sand rubble under assembling water permeable sidewalk concrete slab
Bed course is pooled in water pipe, and road face in pavement is without ponding in the case where accomplishing middle or small rainfall.
To achieve the above object, technical scheme is as follows: a kind of system of fabricated permeable pavement concrete slab
Make method, it is characterised in that the described method includes:
A, mold is made, the mould upstream is template cavity, and bottom is equipped with matts recessed portion；
B, the steel bar stress in mold bottom matts recessed portion, then casting concrete to the top of matts recessed portion
Portion；
C, the polyphenylene sulfide resin lotion of 0.1L/ ㎡ is sprayed on surface after the completion of casting reinforced concrete；
D, 3-5min is completed in step C be poured pervious concrete 0.5-1cm；
E, the polyphenylene sulfide resin lotion of 0.1L/ ㎡ is sprayed on the thick casting pervious concrete face 0.5-1cm immediately；
F, pouring for subsequent pervious concrete is completed in mold, and fabricated permeable pavement concrete slab is made.
Further, the production method of polyphenylene sulfide resin lotion are as follows: 1, room temperature be solid polyphenylene sulfide resin system
For at 0.6mm flour sand below；2, common cation or anion surface active types of emulsifiers are selected；3, by polyphenylene sulphur
Ether resin flour sand and emulsifier are placed in colloid mill jointly, and colloid mill storehouse temperature controls the lotion discharging at 70-80 DEG C, after grinding
60-80 DEG C of temperature.
Further, for the emulsifier volume of polyphenylene sulfide resin lotion in 1-5%, polyphenylene sulfide resin content is 2-
17%, remaining is water.
Preferably, in polyphenylene sulfide resin lotion, the volume of cationic emulsifier is 4% or anion emulsifier
Volume is 5%, and polyphenylene sulfide resin content is 11%.
Further, the whole thickness deviation after molding initial set is between ± 3mm, and (3 meters straight for surface smoothness≤5mm
Ruler method).The blind way of precast slab is using impression protrusion and concave processing, blind item protrusion 5mm；Blind way setting on panel
Seated position should meet accessibility designs specification (GB50763-2012) requirement；In custom mold, it is real that exclusive cover board should be customized
The processing of existing impression.The coefficient of permeability of precast slab entirety is 0.1-0.2mm/s, permeable using GB/T 25993-2010
Coefficient testing method.
Further, the material requirements of the matts frame part of armored concrete is as follows: saturation compression strength >=
40MPa is saturated flexural strength >=2.5MPa；Reinforcing bar reaches HRB400 grades；Reinforcing bar resists tensile stress when lifting, and reinforcing bar is buried to common
At the above 3-5cm of concrete bottom；Thickness >=5cm of pervious concrete surface layer.
The material of pervious concrete surface layer and armored concrete has gradual transition section, and the gradual transition section is impregnated with polyphenyl
Base sulfide resin lotion；So that sufficiently merge between pervious concrete and armored concrete, regenerated aggregate and commonly gather materials it
Between discharge shrinkage stress in advance.Gradual transition section can adjust according to the actual situation with a thickness of 1-2cm, not do rigid setting.
Further, the regenerated aggregate of 30-50% is selected in pervious concrete part, and the flat-elongated particles of regenerated aggregate contain
Measure < 8%, crush values < 25%, Los Angeles abrasion loss < 25%.The other materials performance removed except regenerated aggregate should all
Meet the requirement of " water-permeable cement concrete pavement technique regulation " (CJJ/T135-2009).
Further, the main component of polyphenylene sulfide resin is polyphenylene thioether, and purity is 60% or more, impurity
According to the difference of synthesis technology including but not limited to polyether-ether-ketone (PEEK), polysulfones (PSF), polyimides (PI), polyphenylene sulphur
The density of ether resin is 1.0-1.4g/cm3。
The main component of above-mentioned polyphenylene sulfide resin is polyphenylene thioether, molecular structural formula are as follows:
Further, the method for paving of fabricated permeable pavement concrete slab of the invention, is laid with gradation on ground
Blotter, granular cushion bottom set flexible porous tube, then utilize hole for hoist by this fabricated permeable pavement coagulation
Native plate is lifted into above granular cushion, and after the completion of lifting, between the concrete slab of adjacent fabricated permeable pavement
Longitudinal piece is reserved, sand or heated bitumen are filled in longitudinal piece or patch fills flexible material.
Further, after the completion of the lifting of fabricated permeable pavement concrete slab, screw thread first is blocked with rubber plug at hole for hoist
Then the bitumen layer of about 8~12mm thickness is perfused in sleeve, finally filled and led up with prefabricated pervious concrete；Later period replaces concrete slab
When, the closure at hole for hoist is pulled out, lifting replacement is carried out.
Further, in the curved section on pavement, fabricated permeable pavement concrete slab is arranged to trapezoidal in the plane.
Further, the two sides reserved space of fabricated permeable pavement concrete slab is filled out with kerbstone and with cobblestone band
It mends.
Further, when being filled up with cobblestone band, the cobblestone of 2-4cm diameter is selected, and is embedded in mortar, cobblestone
Partial denudation.
The advantage of the invention is that this concrete slab can be fabricated to the bigger size of more existing paving brick, existing people can be improved
Trade facing brick paving skid resistance and flatness are insufficient, achieve the purpose that rainwater permeate in time, walks comfortably and panel durability is strong,
And pavement process is rapid in construction, base's surface layer is not necessarily to conditioned time, and open to traffic immediately is completed in construction.Assembly of the invention
Formula water permeable sidewalk concrete slab improves the mechanical property in common water-permeable brick pavement face, flatness, utmostly reduces
Seam improves walking comfort；The stage for largely needing health is transferred to factory in prefabrication practice to complete, high degree
Shorten and the duration and ensure that the quality of concrete.Fabricated permeable pavement of the present invention concrete slab and its paving structure are another
Tool infiltration row's performance is significant, and the feature that anti-slippery effect is excellent, durability is good can be relieved the status that pavement is wet and slippery under medium and small rain condition condition,
It can be used for the pavement and square, parkway of all grade roads.
Detailed description of the invention
Fig. 1 is present invention design fabricated permeable concrete slab perspective view；
Fig. 2 is present invention design fabricated permeable concrete slab plan view；
Fig. 3 is present invention design fabricated permeable concrete slab arrangement of reinforcement；
Fig. 4 is design reinforcement elevation of the present invention；
Fig. 5 is present invention design fabricated permeable concrete slab deflecting plate (example, 3 × 2 meters of trapezoidal plates realize 2 ° of steerings)；
Fig. 6 is present invention design fabricated permeable concrete sidewalk face structure chart；
Fig. 7 is that present invention design fabricated permeable concrete sidewalk buffers cobblestone band.
Specific embodiment
Three-dimensional plate body as shown in Figure 1, including three parts: armored concrete matts frame 1；Pervious concrete surface layer
2；(3) hole for hoist 3；The cement concrete of the generally prefabrication formula mold construction production of prefabricated pervious concrete plate, uses
The mold of pre-production forms casting.Longitudinal reinforcement 4 and transverse steel 5, reinforcing bar are embedded in armored concrete matts frame 1
The material requirements of concrete matts frame 1 is as follows: saturation compression strength >=40MPa is saturated flexural strength >=2.5MPa；Reinforcing bar
Up to HRB400 grades；Reinforcing bar resists tensile stress when lifting, and reinforcing bar is buried to the above 3-5cm of concrete bottom, and reinforcing bar generally uses
14 reinforcing bar of Φ.Wherein thickness >=5cm of pervious concrete surface layer；Pervious concrete surface layer and armored concrete matts frame it
Between have changeover portion；Changeover portion 1-2cm, can adjust according to the actual situation, not do rigid setting.
The production method of fabricated permeable pavement concrete slab of the invention, it is characterised in that the described method includes:
A, mold is made, the mould upstream is template cavity, and bottom is equipped with matts recessed portion；
B, the steel bar stress in mold bottom matts recessed portion, then casting concrete to the top of matts recessed portion
Portion；
C, the polyphenylene sulfide resin lotion of 0.1L/ ㎡ is sprayed on surface after the completion of casting reinforced concrete；
D, 3-5min is completed in step C be poured pervious concrete 0.5-1cm；
E, the polyphenylene sulfide resin lotion of 0.1L/ ㎡ is sprayed on the thick casting pervious concrete face 0.5-1cm immediately；
F, pouring for subsequent pervious concrete is completed in mold.
Further, the production method of polyphenylene sulfide resin lotion are as follows: 1, room temperature be solid polyphenylene sulfide resin system
For at 0.6mm flour sand below；2, common cation or anion surface active types of emulsifiers are selected；3, by polyphenylene sulphur
Ether resin flour sand and emulsifier are placed in colloid mill jointly, and colloid mill storehouse temperature controls the lotion discharging at 70-80 DEG C, after grinding
60-80 DEG C of temperature.
Further, for the emulsifier volume of polyphenylene sulfide resin lotion in 1-5%, polyphenylene sulfide resin content is 2-
17%, remaining is water.
The regenerated aggregate of pervious concrete part selection 30-50%, the flat-elongated particles content < 8% of regenerated aggregate,
Crush values < 25%, Los Angeles abrasion loss < 25%.Other materials performance except removing regenerated aggregate should all meet " permeable
Cement concrete pavement technical regulation " (CJJ/T135-2009) requirement.
Whole thickness deviation after molding initial set is between ± 3mm, surface smoothness≤5mm (3 meters of ruler methods).It is prefabricated
The blind way of concrete slab is using impression protrusion and concave processing, blind item protrusion 5mm；Setting position of the blind way on panel should expire
Sufficient accessibility designs specification (GB50763-2012) requires；In custom mold, the place that exclusive cover board realizes impression should be customized
Reason.The coefficient of permeability of precast slab entirety is 0.1-0.2mm/s, using GB/T 25993-2010 coefficient of permeability test side
Method.
Hole for hoist uses M12 screw shell, screw shell lower part and 1 inside steel bar stress of armored concrete matts frame
Connection, top are lower than normal concrete surface layer 10mm, first block screw shell with rubber plug at hole for hoist, and about 10mm thickness is then perfused
Bitumen layer, finally filled and led up with prefabricated pervious concrete, the later period replace when, the closure at hole for hoist is pulled out, is lifted
Replacement.As shown in fig. 6, being laid with granular cushion 6 (screed-coat containing microlith) on ground, granular cushion bottom sets soft
Then fabricated permeable pavement of the present invention concrete slab 7 is lifted into above granular cushion, and is lifting by water-permeable pipe 8
After the completion, longitudinal piece 10mm is reserved, the flexible materials such as sand or heated bitumen or patch encapsulating patch are filled in longitudinal piece.
Curved section on pavement calculates total angle of turning and the edge lengths up and down of plate according to turning radius,
The plane of plate be arranged to it is trapezoidal, as shown in figure 5,2 ° of steering can be achieved in 2 meters × 3 meters of monolithic block in case.Assembled is saturating
Enough spaces are reserved in the two sides of water pavement concrete slab, and fabricated permeable pavement concrete slab is smoothly put
It sets to screed-coat, it is subsequent to fill up vacant irregular unilateral part according to kerbstone and with cobblestone band, as shown in Figure 7.Select 2-
The cobblestone 11 of 4cm diameter, and be embedded in mortar 10, cobblestone partial denudation.9 be foundation soil in figure.
The advantage of the invention is that this concrete slab can be fabricated to the bigger size of more existing paving brick, existing people can be improved
Trade facing brick paving skid resistance and flatness are insufficient, achieve the purpose that rainwater permeate in time, walks comfortably and panel durability is strong,
And pavement process is rapid in construction, base's surface layer is not necessarily to conditioned time, and open to traffic immediately is completed in construction.The present invention is by adopting
With fabricated permeable pavement concrete slab and its paving structure, improves the mechanical property in common water-permeable brick pavement face, puts down
Whole degree, utmostly reduces seam, improves walking comfort；The stage of health will be largely needed to shift in prefabrication practice
It is completed to factory, shortening for high degree and ensure that the quality of concrete at the duration.Fabricated permeable pavement of the present invention is mixed
Concrete board and its paving structure separately have infiltration row performance it is significant, the feature that anti-slippery effect is excellent, durability is good can be relieved medium and small rain condition condition
The wet and slippery status in lower pavement.It can be used for the pavement and square, parkway of all grade roads.
Embodiment 1
Certain town road, two-way pavement, protoplast trade need to be transformed, people's row that wherein span width is 3.2 meters wide
Mated formation using 2 meters wide and 3 meters long fabricated permeable pavement of the present invention concrete slab and its structure in road.
The saturation compression strength of armored concrete is 48MPa, and saturation flexural strength is 2.8MPa；Reinforcing bar is HRB400 grades；
Reinforcing bar resists tensile stress when lifting, and reinforcing bar is buried to the above 3cm in normal concrete bottom surface；The wherein thickness of pervious concrete part
Degree >=5cm；Pervious concrete and the material of armored concrete have the Chong Die transitional region 2cm of gradual change.Precast slab entirety
Coefficient of permeability is 0.2mm/s.Suspension centre uses M12 screw shell, and after the completion of lifting, longitudinal piece 10mm is reserved, in longitudinal direction
Sand processing is filled in piece.Other steps are not specifically limited.
Embodiment 2
Certain town road, two-way pavement, protoplast trade need to be transformed, people's row that wherein span width is 2.1 meters wide
Mated formation using 1.3 meters wide and 2 meters long fabricated permeable pavement of the present invention concrete slab and its structure in road.
The saturation compression strength of armored concrete is 48MPa, and saturation flexural strength is 2.8MPa；Reinforcing bar is HRB400 grades；
Reinforcing bar resists tensile stress when lifting, and reinforcing bar is buried to the above 3cm in normal concrete bottom surface；The wherein thickness of pervious concrete part
Degree >=5cm；Pervious concrete and the material of armored concrete have the Chong Die transitional region 2cm of gradual change.Precast slab entirety
Coefficient of permeability is 0.15mm/s.Suspension centre uses M12 screw shell, and after the completion of lifting, longitudinal piece 10mm is reserved, in longitudinal direction
Sand processing is filled in piece.Other steps are not specifically limited.
Comparative example
Certain town road, two-way pavement, protoplast trade need to be transformed, people's row that wherein span width is 2.1 meters wide
The part way in road is mated formation using 6cm thickness homogeneity brick.Screed-coat uses 3cm medium coarse sand, and cement stabilizing is respectively adopted in base
Rubble and graded broken stone.
Successively the flatness of embodiment 1,2 and comparative example, flexural strength, compression strength and speed of application are detected and commented
Valence.
| Technical solution | Flatness | Flexural strength | Compression strength | Speed of application |
| Embodiment 1 | 2mm | 2.8MPa | 48MPa | 2d/500m |
| Embodiment 2 | 3mm | 2.8MPa | 48MPa | 2d/500m |
| Comparative example | 8mm | 0.4MPa | 15MPa | 27d/500m |
From inspection result as can be seen that fabricated permeable pavement concrete slab and its paving structure that the present invention is shown
, mechanical property high with flatness be excellent and the quick advantage of construction.
The present invention improves common water-permeable brick people by using fabricated permeable pavement concrete slab and its paving structure
Mechanical property, the flatness in trade face, utmostly reduce seam, improve walking comfort；It in prefabrication practice will be big
Amount needs the stage of health to be transferred to factory's completion, and shortening for high degree and ensure that the quality of concrete at the duration.This hair
Bright fabricated permeable pavement concrete slab and its paving structure separately have infiltration row performance it is significant, anti-slippery effect is excellent, durability is good
Feature can be relieved the status that pavement is wet and slippery under medium and small rain condition condition.It can be used for the pavement and square, park of all grade roads
Road.
Claims (5)
1. a kind of production method of fabricated permeable pavement concrete slab, it is characterised in that the described method includes:
A, mold is made, the mould upstream is template cavity, and bottom is equipped with matts recessed portion；
B, the steel bar stress in mold bottom matts recessed portion, the interior embedment of mold bottom matts recessed portion is as hole for hoist
Screw shell, screw shell lower part are connect with steel bar stress, and top is lower than 8 ~ 12mm of die top, then in matts recessed portion
Interior casting concrete is to the top of matts recessed portion；
C, the polyphenylene sulfide resin lotion of 0.1L/ ㎡ is sprayed on surface after the completion of casting reinforced concrete；
D, 3-5min is completed in step C be poured pervious concrete 0.5-1cm；
E, the polyphenylene sulfide resin lotion of 0.1L/ ㎡ is sprayed on the thick casting pervious concrete face 0.5-1cm immediately；
F, pouring for subsequent pervious concrete is completed in the top template cavity of mold, the fabricated permeable with hole for hoist is made
Pavement concrete slab.
2. a kind of production method of fabricated permeable pavement concrete slab according to claim 1, it is characterised in that: step
In rapid E, the production method of polyphenylene sulfide resin lotion are as follows: a, room temperature are that solid polyphenylene sulfide resin is prepared into 0.6mm
Flour sand below；B, common cation or anion surface active types of emulsifiers are selected；C, by polyphenylene sulfide resin powder
Sand and emulsifier are placed in colloid mill jointly, and colloid mill storehouse temperature controls the lotion drop temperature 60- at 70-80 DEG C, after grinding
80℃。
3. a kind of production method of fabricated permeable pavement concrete slab according to claim 2, it is characterised in that: poly-
The emulsifier volume of aralkyl sulfid resin emulsion is 2-17% in 1-5%, polyphenylene sulfide resin content, remaining is water.
4. a kind of production method of fabricated permeable pavement concrete slab according to claim 1, it is characterised in that: field
The material requirements of the armored concrete of word lattice recessed portion is as follows: saturation compression strength >=40MPa, and saturation flexural strength >=
2.5MPa；Reinforcing bar reaches HRB400 grades；Reinforcing bar resists tensile stress when lifting, and reinforcing bar is buried to the above 3-5cm in normal concrete bottom surface
Place；Thickness >=5cm of pervious concrete surface layer.
5. a kind of production method of fabricated permeable pavement concrete slab according to claim 1, it is characterised in that: dress
After the completion of the lifting of formula water permeable sidewalk concrete slab, screw shell first is blocked with rubber plug at hole for hoist, then it is perfused about 8 ~
The bitumen layer of 12mm thickness, is finally filled and led up with prefabricated pervious concrete；When later period replaces concrete slab, by the closure at hole for hoist
It pulls out, carries out lifting replacement.
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| CN112959459A (en) * | 2021-02-24 | 2021-06-15 | 中煤远大淮北建筑产业化有限公司 | Preparation method of assembled pervious concrete road board |
| CN114808593A (en) * | 2022-03-31 | 2022-07-29 | 武汉理工大学 | Multilayer composite prefabricated permeable pavement slab and construction method thereof |
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