CN108914734B - High-tensile-strength pervious concrete sandwich structure and preparation method thereof - Google Patents

High-tensile-strength pervious concrete sandwich structure and preparation method thereof Download PDF

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CN108914734B
CN108914734B CN201810756179.1A CN201810756179A CN108914734B CN 108914734 B CN108914734 B CN 108914734B CN 201810756179 A CN201810756179 A CN 201810756179A CN 108914734 B CN108914734 B CN 108914734B
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geogrid
pervious concrete
layer
reinforcement layer
concrete
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CN108914734A (en
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姜清辉
池寅
孟晓宇
张云天
刘乳燕
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Wuhan University WHU
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Wuhan University WHU
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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
    • E01C5/06—Pavings made of prefabricated single units made of units with cement or like binders
    • E01C5/08—Reinforced units with steel frames
    • 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
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/40—Mixing specially adapted for preparing mixtures containing fibres
    • B28C5/402—Methods
    • 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
    • C04B28/04—Portland cements
    • 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
    • E01C5/00—Pavings made of prefabricated single units
    • E01C5/06—Pavings made of prefabricated single units made of units with cement or like binders
    • E01C5/065—Pavings made of prefabricated single units made of units with cement or like binders characterised by their structure or component materials, e.g. concrete layers of different structure, special additives
    • 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

Abstract

The invention discloses a high-tensile-strength pervious concrete sandwich structure and a preparation method thereof, wherein the high-tensile-strength pervious concrete sandwich structure comprises a pervious concrete structure main body, a geogrid reinforcement layer and an adhesive layer; one layer or a plurality of layers of geogrid reinforcement layers are laid at intervals in the tension area in the permeable concrete structure main body; the upper surface and the lower surface of each geogrid reinforcement layer are coated with adhesive layers; fiber materials are distributed in the permeable concrete structure main body; and the spaces of the grids of the geogrid reinforcement layer are filled with pervious concrete distributed with fiber materials. The tensile strength of the pervious concrete sandwich structure is improved by utilizing the combined action of the geogrid reinforced layer, the bonding layer, the fiber material and the pervious concrete. In addition, the construction method is simple and flexible, has economic cost, and has important significance for expanding the application range of the pervious concrete and promoting the construction of sponge cities in China.

Description

High-tensile-strength pervious concrete sandwich structure and preparation method thereof
Technical Field
The invention relates to the field of building materials for constructing intelligent sponge cities, in particular to a high-tensile-strength pervious concrete sandwich structure and a preparation method thereof.
Background
The pervious concrete is ecological concrete prepared by mixing cement, coarse aggregate, admixture and additive in a specific gradation according to a certain proportion. The existence of the continuous pores of the pervious concrete can effectively solve the problems of ponding in cities and water damage of structures and promote water circulation in cities and nature. The heat absorption and storage effect is obvious, and the urban heat island effect can be effectively relieved. The porous structure can also absorb sound and reduce noise, thereby reducing the noise pollution of cities. The existence of large pores also enables the freeze-thaw resistance of the pervious concrete to be higher than that of the ordinary concrete. With the continuous promotion of the construction process of sponge cities in China, the pervious concrete structure is widely applied to municipal engineering construction due to the ecological advantages of the pervious concrete structure.
The porous structural characteristics of the pervious concrete bring many advantages and have certain disadvantages: low tensile strength and poor crack resistance. This limits the application range of the pervious concrete, so that the pervious concrete cannot be applied to stressed structures such as drainage retaining walls and drainage pipe piles by utilizing the drainage advantage of the pervious concrete. The pervious concrete is mostly used for paving sidewalks and parking lots at the present stage, and cracks are mostly generated when the pervious concrete is used as a load pavement. The existing research shows that the water-cement ratio, the aggregate grain diameter, the fiber type, the length and other factors are important factors influencing the bending tensile strength of the pervious concrete from the material composition and the mixing proportion, and by improving the factors, the bending tensile strength can only be improved from 2MPa to about 3MPa, and the requirements of CJJ 37-2012 urban road engineering design specification on the bending strength of express roads and main roads which is not lower than 5.0MPa are difficult to meet.
In order to further improve the tensile property of the pervious concrete, a reinforced material can be arranged in the pervious concrete. For example, the permeable reinforced concrete disclosed in the chinese invention patent (publication No. CN104446076A) combines permeable concrete with anticorrosion steel bars, but since the permeable concrete is different from conventional concrete, the steel bars in the permeable concrete are easy to corrode under the action of long-term frequent water circulation, and therefore, the permeable reinforced concrete needs to be tightly covered and wrapped with the anticorrosion steel bars, and the construction process is complicated.
Disclosure of Invention
The invention aims to provide a high-tensile-strength pervious concrete sandwich structure which is simple in construction and low in cost and a preparation method thereof.
The invention provides a high-tensile-strength pervious concrete sandwich structure which comprises a pervious concrete structure main body, a geogrid reinforcement layer and an adhesive layer; one layer or a plurality of layers of geogrid reinforcement layers are paved at intervals in a tension area in the permeable concrete structure main body; the upper surface and the lower surface of each geogrid reinforcement layer are coated with adhesive layers; fiber materials are distributed in the permeable concrete structure main body; and the spaces of the grids of the geogrid reinforcement layer are filled with pervious concrete distributed with fiber materials. The tension area refers to an area of the permeable concrete structure body which is easy to be damaged by tension.
Further, the pervious concrete structure main body is prepared by mixing cement, fly ash, coarse aggregate, water and a water reducing agent.
As a preferred scheme, when the permeable concrete structure main body is prepared, the water-to-glue ratio is 0.26-0.30;
the cement is ordinary Portland cement with the label, and the dosage is 410kg/m3～438kg/m3；
The fly ash is first-grade fly ash, and the using amount is 51kg/m3～77kg/m3；
The coarse aggregate is graded broken stone with the grain size range of 5 mm-15 mm, and the dosage is 1400kg/m3～1800kg/m3；
The water reducing agent is a liquid polycarboxylic acid high-efficiency water reducing agent with the water reducing rate of not less than 25 percent, and the dosage is 2kg/m3～8kg/m3。
Preferably, the length of the fiber material is 18 mm-20 mm, and the volume of the fiber material accounts for 0.1% -0.3% of the volume of the whole permeable concrete structure body.
Further, the fiber material is basalt fiber, carbon fiber, polypropylene fiber or glass fiber.
Preferably, the geogrid reinforcement layer adopts a polypropylene bidirectional geogrid, and the tensile strength of the adopted polypropylene bidirectional geogrid is not lower than 40 kN/m.
Preferably, the bonding layer is made of normal temperature curing epoxy resin glue.
In the invention, the geogrid reinforcement layer is arranged in the tension area of the permeable concrete structure main body and is arranged according to the tension direction, namely when the geogrid reinforcement layer is laid, the tension direction of the geogrid reinforcement layer is consistent with the tension direction of the permeable concrete structure main body. When multiple layers of geogrid reinforced layers are laid at intervals, the tensile strength of the permeable concrete structure main body can be further increased. Because the fiber material, especially basalt fiber, has good compatibility with cement, the fiber material is uniformly distributed in the permeable concrete structure main body, and the tensile strength of the cement matrix of the permeable concrete structure main body can be effectively improved.
The invention provides a preparation method of a high-tensile-strength pervious concrete sandwich structure, which comprises the following steps of:
step 1, prefabricating a mould, and fixing the position of a pre-buried geogrid reinforcement layer in the mould;
step 2, pouring the pervious concrete distributed with the fiber materials into a mold until reaching a calibration position, and vibrating while pouring;
step 3, coating the lower surface of the geogrid reinforcement layer with a binder, paving the geogrid reinforcement layer on poured pervious concrete before the binder is cured, and filling the pervious concrete in the gaps of the geogrid reinforcement layer; then coating an adhesive on the upper surface of the geogrid reinforcement layer;
step 4, before the binder on the upper surface of the geogrid reinforced layer is cured, pouring pervious concrete distributed with fiber materials on the geogrid reinforced layer, and vibrating while pouring;
and 5, maintaining and removing the mold.
The invention provides a preparation method of a high-tensile-strength pervious concrete sandwich structure, when a plurality of geogrid reinforcement layers are paved at intervals, the method comprises the following steps:
step 1, prefabricating a mould, and fixing the positions of the geogrid reinforcement layers of the pre-buried layers in the mould;
step 2, pouring the pervious concrete distributed with the fiber materials into the mold until the lowest calibration position, and vibrating while pouring;
step 3, coating the lower surface of the geogrid reinforcement layer with a binder, paving the geogrid reinforcement layer on poured pervious concrete before the binder is cured, and filling the pervious concrete in the gaps of the geogrid reinforcement layer; then coating an adhesive on the upper surface of the geogrid reinforcement layer;
step 4, before the binder on the upper surface of the geogrid reinforced layer is cured, pouring permeable concrete distributed with fiber materials on the geogrid reinforced layer until the permeable concrete reaches the calibration position of the current lowest position, and vibrating while pouring;
step 5, repeating the steps 3-4 until the laying of the multi-layer geogrid reinforcement layer is completed;
and 6, maintaining and removing the mold.
In step 4, the current lowest calibration position refers to the calibration position above and closest to the geogrid reinforcement layer which is just laid.
In the two preparation methods, the vibration is carried out while pouring, so that the tight combination of the geogrid reinforcement layer and the pervious concrete can be ensured.
In the two preparation methods, the pervious concrete distributed with the fiber materials is obtained by adopting the following method:
pouring half of the water and all the coarse aggregate into a stirrer to be stirred for 45-60 s;
dispersing the fiber material in the rest water, pouring the water, the cement and the fly ash in which the fiber material is dispersed into a stirrer, and continuously stirring for 60-90 s;
adding the water reducing agent into the stirrer and continuously stirring for 30-45 s to obtain the pervious concrete distributed with the fiber materials.
Preferably, when the pervious concrete distributed with the fiber materials is poured, the vibration adopts a mode of combining low-frequency vibration table vibration and manual vibration. The low-frequency vibration table is adopted for vibration, so that the bottom sealing slurry of the pervious concrete slurry can be prevented from sinking.
The mechanism of the pervious concrete sandwich structure with high tensile strength is as follows:
firstly, the fiber material, particularly basalt fiber, has good compatibility with a cement matrix of a pervious concrete structure main body, and can form good bond stress with the cement matrix, and the cement matrix has good tensile strength by doping the fiber material; the fiber materials uniformly distributed in the cement matrix form a three-dimensional grid, so that the mechanical property of the permeable concrete structure main body is uniform.
Secondly, the geogrid reinforced layer is used as a reinforced material, and the tensile strength of the pervious concrete structure can be obviously improved by utilizing the high tensile strength of the geogrid reinforced layer; meanwhile, the two-dimensional grid pores of the geogrid reinforcement layer are filled with coarse aggregate, so that the geogrid reinforcement layer and the pervious concrete are locked into a whole.
In addition, the upper surface and the lower surface of the geogrid reinforced layer are coated with the adhesive, so that the interface strength of the geogrid reinforced layer and the permeable concrete structure is improved, and the geogrid reinforced layer and the permeable concrete are prevented from sliding relatively.
Based on the aforesaid, when the concrete sandwich structure that permeates water is curved, geogrid adds muscle layer, tie coat, fiber material and the concrete combined action that permeates water, can guarantee the high tensile strength of the concrete sandwich structure that permeates water.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
(1) the pervious concrete sandwich structure can fully exert the pervious capability of pervious concrete, ensure good tensile capability, can be used as various pervious members of a pulled part, and has wider application range.
(2) The geogrid reinforced layer and the fiber material have good chemical property and thermal stability and cannot be corroded in water environment.
(3) The construction is simple and flexible, the cost is economic, the construction method is suitable for cast-in-place concrete members and precast concrete members, and the construction method has important significance for expanding the application range of pervious concrete and promoting the construction of sponge cities in China.
Drawings
FIG. 1 is a schematic view of a high tensile strength pervious concrete sandwich structure in an embodiment.
In the figure, 1-lower layer pervious concrete, 2-upper layer pervious concrete, 3-geogrid reinforcement layer, 4-basalt fiber and 5-bonding layer.
Detailed Description
In order to more clearly illustrate the present invention and/or the technical solutions in the prior art, the following will describe embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Example 1
In this embodiment, basalt fiber is used as the fiber material.
The embodiment provides a high tensile pervious concrete sandwich beam structure, as shown in fig. 1, the beam structure comprises lower pervious concrete 1, upper pervious concrete 2, geogrid reinforcement layer 3, bonding layer 5 and basalt fibers 4 uniformly distributed in the lower pervious concrete 1 and the upper pervious concrete 2. The geogrid reinforcement layer 3 is paved at the bottom of the beam with the distance
Figure BDA0001726774400000051
Where h represents the beam height. The bonding layer 5 is made of epoxy resin adhesive cured at normal temperature and is uniformly coated on the upper surface and the lower surface of the geogrid reinforcement layer 3.
In this embodiment, the lower pervious concrete 1 and the upper pervious concrete 2 are prepared from pervious concrete, and the pervious concrete is prepared by mixing cement, fly ash, coarse aggregate, water and a water reducing agent. Wherein, the cement adopts ordinary Portland cement with the reference number of 42.5; the fly ash is first-grade fly ash; the coarse aggregate is quartz crushed stone with the particle size range of 10-15 mm, and the apparent density of the adopted coarse aggregate is 2.73g/cm3The compact bulk density was 1.51g/cm3(ii) a The length of basalt fiber is 20mm, the monofilament diameter is 15 μm, and the density is 2.65g/cm3The elastic modulus is 95 GPa-115 GPa, the tensile strength is 3300 MPa-4500 MPa, and the elongation at break is 2.4% -3.0%; the water is tap water; the water reducing agent is a liquid polycarboxylic acid high-efficiency water reducing agent with the water reducing rate of 25 percent.
The lower layer pervious concrete 1 and the upper layer pervious concrete 2 are prepared from pervious concrete in the following mixing ratio:
the dosage of the cement is 438kg/m3The dosage of the fly ash is 77kg/m3The dosage of the coarse aggregate is 1480kg/m3The dosage of the basalt fiber is 7.8kg/m3The amount of water used is 137kg/m3The dosage of the water reducing agent is 2.1kg/m3。
The preparation method of the high tensile strength pervious concrete sandwich beam structure of the embodiment is as follows:
(1) prefabricating a mold:
according to the prefabricated mould of actual demand, in this embodiment, prefabricated size is 550mm × 150mm × 150 mm's mould, marks the position of pre-buried geogrid reinforcement layer 3 in the mould inside.
(2) Preparing pervious concrete:
pouring half of the water and all the coarse aggregate into a stirrer to be stirred for 60 s; then, uniformly dispersing the basalt fibers 4 in the rest water, and pouring the water, the cement and the fly ash in which the basalt fibers 4 are dispersed into a stirrer to continuously stir for 90 s; and adding the water reducing agent and stirring for 30s to obtain the pervious concrete with good workability.
(3) Pouring lower-layer pervious concrete 1:
pouring the pervious concrete into the mould in 2-3 layers until the mould is calibrated. And when pouring, vibrating by adopting a method of combining low-frequency vibration table vibration and manual vibration so as to avoid slurry sinking and bottom slurry sealing.
(4) Installing a geogrid reinforcement layer 3:
in the embodiment, the geogrid reinforcement layer 3 adopts a polypropylene bidirectional geogrid with the tensile strength of 40 kN/m. Firstly, coating normal temperature curing epoxy resin glue on the lower surface of the geogrid reinforcement layer 3. Before the epoxy resin adhesive is cured at normal temperature, the geogrid reinforcement layer 3 is flatly placed into a mould and is flatly paved on the lower layer of pervious concrete 2. When the geogrid reinforcement layer 3 is laid flatly, the four corners, the bottom and the grid gaps of the geogrid reinforcement layer 3 are gradually filled with pervious concrete as far as possible along the same direction of the geogrid reinforcement layer 3 and are compacted manually, and the position of the geogrid reinforcement layer 3 is strictly controlled in the process so that the geogrid reinforcement layer is located at a calibration position. And finally, coating normal-temperature curing epoxy resin glue on the upper surface of the laid geogrid reinforcement layer 3.
(5) Pouring upper layer pervious concrete 2:
before the normal-temperature cured epoxy resin adhesive on the upper surface of the geogrid reinforced layer 3 is cured, pouring the pervious concrete onto the geogrid reinforced layer 3, and vibrating while pouring so as to ensure that the geogrid reinforced layer 3 is tightly combined with the pervious concrete.
(6) Maintaining and removing the mold:
curing the mixture for 24 hours in an environment with the temperature of 20 +/-2 ℃ and the relative humidity of 95 percent, and then stripping the mold. After the mold is removed, the mixture is maintained for 28 days in an environment with the temperature of 20 +/-2 ℃ and the relative humidity of 95 percent.
Example 2
This example is used to provide comparative experiments and experimental data.
Making a pervious concrete beam structure U, R0、R1And high tensile pervious concrete sandwich beam structure R2、R3. The beam structure U is provided with a soil-free grille reinforcement layer, a bonding layer and basalt fibers and is only a permeable concrete structure main body. Beam structure R0The geogrid reinforced layer and the bonding layer are not needed, and the basalt fibers are only uniformly distributed in the permeable concrete structure main body. Beam structure R1A geogrid reinforced layer is flatly paved in the permeable concrete structure main body, basalt fibers are uniformly distributed, and the upper surface and the lower surface of the geogrid reinforced layer are not coated with bonding layers. Beam structure R2And R3The concrete beam is manufactured by the method of the embodiment 1, the geogrid reinforced layer is evenly paved in the permeable concrete structure main body, the basalt fibers are evenly distributed, the upper surface and the lower surface of the geogrid reinforced layer are coated with bonding layers, and the beam structure R2In the middle, only a single-layer geogrid reinforced layer and a beam structure R are arranged3Two geogrids reinforced layers are arranged in the soil-working chamber. The mix proportion and the process of the pervious concrete adopted by the beam structure manufactured by the embodiment are the same.
Separately measuring beam structure U, R0、R1、R2、R3The compressive strength and tensile strength of the steel sheet are shown in Table 1. As can be seen from Table 1, the high tensile pervious concrete beams R2、R3The flexural strength of the composite material is more than 5MPa, and the composite material is superior to a beam structure U without a soil grille reinforcement layer and basalt fiber and a beam structure R only with basalt fiber0And a beam structure R with a geogrid reinforcement layer and basalt fibers but no bonding layer1. Comparative Beam Structure R1、R2After the upper surface and the lower surface of the geogrid reinforced layer are uniformly coated with normal-temperature cured epoxy resin glue, the beam structure R2Tensile strength of the beam structure R1The gain effect of the bonding layer is obvious after the gain is improved by 10 percent. Beam structure R with two geogrids and reinforcing layers3The tensile strength of the steel can reach 6MPa, is improved by 88.2 percent compared with a beam structure U, and is improved by 88.2 percent compared with a beam structure R0Improved by 56.1 percent compared with a beam structure R130.6 percent higher than that of a beam structure R2The tensile strength of the geogrid reinforced layer can be obviously improved by 18.5 percent by increasing the number of layers of the geogrid reinforced layer in the tensile area.
In addition, the data in table 1 also show that the compressive strength of the high-tensile pervious concrete beam is obviously improved compared with that of the pervious concrete beam structure.
Table 1 table of compression and tensile strength of beam structure in example 2
Figure BDA0001726774400000071
Although the present invention has been described in detail with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (8)

1. High tensile concrete sandwich structure that permeates water, characterized by:
the construction method comprises a permeable concrete structure main body, a geogrid reinforcement layer and a bonding layer;
one layer or a plurality of layers of geogrid reinforcement layers are paved at intervals in a tension area in the permeable concrete structure main body;
the upper surface and the lower surface of each geogrid reinforcement layer are coated with adhesive layers;
fiber materials are distributed in the permeable concrete structure main body;
filling pervious concrete distributed with fiber materials in the gaps of the grids of the geogrid reinforcement layer;
the bonding layer is made of epoxy resin adhesive cured at normal temperature;
the fiber material is basalt fiber, the length of the fiber material is 18 mm-20 mm, and the volume of the fiber material accounts for 0.1% -0.3% of the volume of the whole permeable concrete structure main body.
2. The high tensile permeable concrete sandwich structure of claim 1, wherein:
the pervious concrete structure main body is prepared by mixing cement, fly ash, coarse aggregate, water and a water reducing agent.
3. The high tensile permeable concrete sandwich structure of claim 2, wherein:
when the permeable concrete structure main body is prepared, the water-to-glue ratio is 0.26-0.30;
the cement is ordinary Portland cement with the label, and the dosage is 410kg/m3～438kg/m3；
The fly ash is first-grade fly ash, and the using amount is 51kg/m3～77kg/m3；
The coarse aggregate is graded broken stone with the grain size range of 5 mm-15 mm, and the dosage is 1400kg/m3～1800kg/m3；
The water reducing agent is a liquid polycarboxylic acid high-efficiency water reducing agent with the water reducing rate of not less than 25 percent, and the dosage is 2kg/m3～8kg/m3。
4. The high tensile permeable concrete sandwich structure of claim 1, wherein:
the geogrid reinforcement layer adopts a polypropylene bidirectional geogrid, and the tensile strength of the adopted polypropylene bidirectional geogrid is not lower than 40 kN/m.
5. The method for preparing a high tensile strength pervious concrete sandwich structure of claim 1, wherein the method comprises the following steps:
when laying a layer of geogrid reinforcement layer, include:
step 1, prefabricating a mould, and fixing the position of a pre-buried geogrid reinforcement layer in the mould;
step 2, pouring the pervious concrete distributed with the fiber materials into a mold until reaching a calibration position, and vibrating while pouring;
step 3, coating the lower surface of the geogrid reinforcement layer with a binder, paving the geogrid reinforcement layer on poured pervious concrete before the binder is cured, and filling the pervious concrete in the gaps of the geogrid reinforcement layer; then coating an adhesive on the upper surface of the geogrid reinforcement layer;
step 4, before the binder on the upper surface of the geogrid reinforced layer is cured, pouring pervious concrete distributed with fiber materials on the geogrid reinforced layer, and vibrating while pouring;
and 5, maintaining and removing the mold.
6. The method for preparing a high tensile strength pervious concrete sandwich structure of claim 5, wherein:
when the interval is laid the multilayer geogrid with reinforcement layer, include:
step 1, prefabricating a mould, and fixing the positions of the geogrid reinforcement layers of the pre-buried layers in the mould;
step 2, pouring the pervious concrete distributed with the fiber materials into the mold until the lowest calibration position, and vibrating while pouring;
step 3, coating the lower surface of the geogrid reinforcement layer with a binder, paving the geogrid reinforcement layer on poured pervious concrete before the binder is cured, and filling the pervious concrete in the gaps of the geogrid reinforcement layer; then coating an adhesive on the upper surface of the geogrid reinforcement layer;
step 4, before the binder on the upper surface of the geogrid reinforced layer is cured, pouring permeable concrete distributed with fiber materials on the geogrid reinforced layer until the permeable concrete reaches the calibration position of the current lowest position, and vibrating while pouring;
step 5, repeating the steps 3-4 until the laying of the multi-layer geogrid reinforcement layer is completed;
step 6, maintaining and removing the mold;
in step 4, the current lowest calibration position refers to the calibration position above and closest to the geogrid reinforcement layer which is just laid.
7. The method of claim 5 or 6, wherein:
the pervious concrete distributed with the fiber materials is obtained by adopting the following method:
pouring half of the water and all the coarse aggregate into a stirrer to be stirred for 45-60 s;
dispersing the fiber material in the rest water, pouring the water, the cement and the fly ash in which the fiber material is dispersed into a stirrer, and continuously stirring for 60-90 s;
adding the water reducing agent into the stirrer and continuously stirring for 30-45 s to obtain the pervious concrete distributed with the fiber materials.
8. The method of claim 5 or 6, wherein:
when the pervious concrete distributed with fiber materials is poured, the vibration adopts a mode of combining the vibration of a low-frequency vibration table and manual vibration.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2793103C1 (en) * 2022-07-06 2023-03-29 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тверской государственный технический университет" (ТвГТУ) Road slab

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CN110528774A (en) * 2019-08-01 2019-12-03 合肥工业大学 A kind of novel synthesis concrete material and preparation method
CN110552271A (en) * 2019-09-27 2019-12-10 佛山科学技术学院 anti-skid pavement structure and construction method thereof
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CN1749201A (en) * 2005-08-04 2006-03-22 上海交通大学 Flyash water permeating road surface concrete
CN102661036B (en) * 2012-05-15 2015-05-20 江苏苏博特新材料股份有限公司 Permeable formwork liner and preparation method thereof
CN106220050B (en) * 2016-07-08 2018-09-28 衢州金厦非凡建材有限公司 High-strength permeable fiber concrete
CN205804078U (en) * 2016-07-19 2016-12-14 江西建工第二建筑有限责任公司 A kind of pervious concrete pavement structure of band reinforcement
CN106348691B (en) * 2016-08-26 2018-07-24 盼石（上海）新材料科技股份有限公司 High service life pervious concrete and preparation method thereof
CN107098632A (en) * 2017-06-06 2017-08-29 湖南三恒建设园林工程有限公司 High-performance environment-friendly ecotype pervious concrete

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2793103C1 (en) * 2022-07-06 2023-03-29 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тверской государственный технический университет" (ТвГТУ) Road slab

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