CN111893836A - Self-cleaning pervious concrete structure and preparation method thereof - Google Patents
Self-cleaning pervious concrete structure and preparation method thereof Download PDFInfo
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- CN111893836A CN111893836A CN202010602425.5A CN202010602425A CN111893836A CN 111893836 A CN111893836 A CN 111893836A CN 202010602425 A CN202010602425 A CN 202010602425A CN 111893836 A CN111893836 A CN 111893836A
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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
Abstract
The invention discloses a self-cleaning permeable concrete structure and a preparation method thereof, wherein the concrete structure comprises a surface protection layer, a permeable geotextile layer and a permeable concrete bearing layer, a water storage device for storing rainwater and underground water is arranged in the permeable concrete bearing layer, a cleaning device for cleaning a blockage by using water of the water storage device, a detection device for detecting the permeability of the self-cleaning permeable concrete structure, and a control system respectively connected with the water storage device, the cleaning device and the detection device. The method comprises the steps of firstly paving a permeable concrete bearing layer, placing permeable geotextile after first rolling, then paving the surface protection layer, and carrying out second rolling. The invention can not only detect the permeability of the pervious concrete in a timing way, but also realize the self-cleaning of the pores in the pervious concrete, avoid the blockage of the pervious concrete in the pores, prevent the blockage of the pervious concrete and ensure the smooth drainage.
Description
Technical Field
The invention relates to a pervious concrete structure and a preparation method thereof, in particular to a self-cleaning pervious concrete structure and a preparation method thereof.
Background
The wide application of pervious concrete can convert a part of surface runoff into subsurface runoff, effectively reduces the burden of a city drainage system, and has important significance on the safety of cities. The reason why the pervious concrete has stronger water permeability than the common concrete is that a large number of pores exist in the pervious concrete, and the reduction of the permeability caused by the blockage of the pores is the most important problem faced by the pervious concrete.
The current solutions to this problem mainly focus on the solution of the problems from the aspects of the pervious concrete structure and the mix ratio of raw materials. The existing permeable concrete structure can not realize self-cleaning and intelligent control.
Disclosure of Invention
The purpose of the invention is as follows: a first object of the present invention is to provide a self-cleaning pervious concrete structure capable of being detected at regular time and automatically cleaned to prevent clogging of pervious concrete;
the second purpose of the invention is to provide a preparation method of the self-cleaning pervious concrete structure.
The technical scheme is as follows: the self-cleaning pervious concrete structure comprises a surface protection layer, a pervious geotextile layer and a pervious concrete bearing layer, wherein a water storage device for storing rainwater and underground water, a cleaning device for cleaning a blockage by using water of the water storage device, a detection device for detecting the permeability of the self-cleaning pervious concrete structure, and a control system respectively connected with the water storage device, the cleaning device and the detection device are arranged in the pervious concrete bearing layer.
In order to provide a detection device of easy detection automatically cleaning concrete structure permeability that permeates water, detection device is including running through the pipeline of surface protection layer, the geotechnological cloth that permeates water and the concrete bearer layer that permeates water, be provided with the flowmeter that is used for detecting rivers flow in the pipeline on the pipeline, be used for detecting the velocity of flow induction system of rivers velocity of flow, with the water pump of water storage device in inputing the pipeline, flowmeter, suction pump and velocity of flow induction system are connected with control system respectively.
In order to effectively prevent external particles from entering the permeable concrete pores, the aggregate particle size in the surface protection layer is smaller than that in the permeable concrete bearing layer.
In order to improve the detection accuracy of the detection device, the surface protection layer is provided with a humidity sensing device for detecting the surface humidity, and the humidity sensing device is connected with the control system, considering that when the humidity is higher than a certain critical value, the detection device has a large error and the detection necessity is reduced. When the humidity sensing device detects that the humidity is higher than a set critical value, the detection device stops operating, wherein the set critical value is determined according to the climate of the construction site and the road surface humidity, such as set to 70-100.
In order to realize the decomposition of organic attachments by photocatalysis and realize self-cleaning function, the surface protection layer comprises the components of photocatalysis nano metal oxide and super-hydrophobic nano inorganic oxide. Wherein the photocatalytic nano metal oxide is nano TiO2Nano ZnO and nano SnO2One of (1); the super-hydrophobic nano inorganic oxide is nano SiO2。
In order to facilitate the realization of cleaning the surface protective layer, the permeable geotextile and the permeable concrete bearing layer, the gap plug is arranged in the gap plug, and the cleaning device is a spraying device. The spraying device penetrates through the surface protection layer, the permeable geotextile and the permeable concrete bearing layer.
The preparation method of the self-cleaning pervious concrete structure comprises the steps of firstly laying the pervious concrete bearing layer, placing the pervious geotextile after the first rolling, laying the surface protection layer, and carrying out the second rolling. Because the grain diameter of the first aggregate in the pervious concrete surface protection layer is smaller than the grain diameter of the second aggregate in the pervious concrete bearing layer, the grains in the pervious concrete surface protection layer possibly pollute the pores in the pervious concrete bearing layer in the construction process, and the construction process and the use of the pervious geotextile can effectively avoid the problem.
Has the advantages that: compared with the prior art, the invention can obtain the following beneficial effects: 1. the permeability of the pervious concrete can be detected in a timing mode, self-cleaning of pores in the pervious concrete can be achieved, blocking objects are prevented from being retained in the pores of the pervious concrete, the pervious concrete is prevented from being blocked, and smooth drainage is guaranteed; 2. the adhesive capacity of fine particles in pores is effectively reduced by controlling the particle size distribution of the pervious concrete and the utilization of the nano material; 3. and the plugs are isolated by adopting the permeable geotextile, so that the blockage of the permeable concrete is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a detecting device according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings.
As shown in fig. 1 and 2, the self-cleaning permeable concrete structure of the present invention is sequentially provided with a surface protective layer 1, a permeable geotextile 2 layer, and a permeable concrete bearing layer 3 from top to bottom.
The surface protection layer 1 is provided with a humidity sensing means 6 for detecting surface humidity. The humidity sensing device 6 is connected with the control system. Considering that the detecting device 7 has a large error and the necessity of detection is reduced when the humidity is higher than a certain critical value, the detecting device 7 stops operating when the humidity sensing device 6 detects that the humidity is higher than a set critical value, wherein the set critical value is determined according to the climate of the construction site and the road surface humidity, for example, set to 70-100. The surface protection layer 1 contains photocatalytic nano metal oxide and super-hydrophobic nano inorganic oxide. Wherein the photocatalytic nano metal oxide is nano TiO2Nano ZnO and nano SnO2One of (1); the super-hydrophobic nano inorganic oxide is nano SiO2. In order to effectively prevent external particles from entering the permeable concrete pores, the aggregate particle size in the surface protection layer 1 is smaller than that in the permeable concrete bearing layer 3.
A water storage device 5 is arranged in the pervious concrete bearing layer 3 and is used for storing rainwater and underground water; the cleaning device 4 penetrates through the surface protection layer 1, the permeable geotextile 2 layer and the permeable concrete bearing layer 3 and is communicated with the water storage device 5, the cleaning device 4 utilizes water of the water storage device 5 to clean gap plugs of the self-cleaning permeable concrete structure, and the cleaning device 4 is a spraying device or other devices capable of conveying water in the water storage device 5 to the structure.
The detection device 7 is communicated with the water storage device 5 and is used for detecting permeability of the self-cleaning permeable concrete structure, the detection device 7 comprises a pipeline 11 penetrating through the surface protection layer 1, the permeable geotextile 2 and the permeable concrete bearing layer 3, a flow meter 8 and a flow velocity sensing device 9 are respectively arranged on the pipeline 11, the flow meter 8 is used for detecting flow rate of water in the pipeline 11, and the flow velocity sensing device 9 is used for detecting flow velocity of the water; the water storage device comprises a water storage device 5, and is characterized by further comprising a water suction pump 10, wherein the water suction pump 10 inputs water in the water storage device 5 into a pipeline 11, and the flowmeter 8, the water suction pump 10 and the flow rate sensing device 9 are respectively connected with a control system (not shown in the figure).
The working process is as follows: the water storage device 5 stores rainwater and underground water, the humidity sensing device 6 senses the humidity of the permeable concrete surface protection layer 1 and transmits signals to the control system, when the humidity sensed by the humidity sensing device 6 is higher than a set critical value, the control device controls the detection device 7 to stop running, otherwise, the control device controls the detection device 7 to run, the water pump 10 pumps water in the water storage device 5 through the pipeline 11 and sequentially flows into the surface protection layer 1, the permeable geotextile 2 layer and the permeable concrete bearing layer 3, meanwhile, the flowmeter 8 records the water flow in the pipeline 11, the control device controls the flow to be always at a constant value, the flow rate sensing device 9 senses real-time permeation flow rate and transmits the real-time permeation flow rate to the control system, and compares the real-time permeation flow rate with an initial flow rate, when the real-time permeation flow rate is slower than the initial flow rate, the structure, the control system controls the spray device to act, and the water in the water storage device 5 is used for cleaning the gap plugs of the self-cleaning permeable concrete structure.
Example 2
The method for manufacturing the self-cleaning water-permeable concrete structure in embodiment 1 includes the following steps: firstly, laying a pervious concrete bearing layer 3, placing a pervious geotextile 2 after primary rolling, laying a surface protective layer again, and performing secondary rolling. Because the particle size of the first aggregate in the pervious concrete surface protection layer 1 is smaller than the particle size of the second aggregate in the pervious concrete bearing layer 3, the particles in the pervious concrete surface protection layer 1 can possibly cause pollution to the pores in the pervious concrete bearing layer 3 in the construction process, and the problem can be effectively avoided by adopting the construction process and the use of the pervious geotextile.
Claims (9)
1. The utility model provides a concrete structure permeates water of automatically cleaning, includes surface protection layer (1), the geotechnological cloth layer (2) and the concrete bearing layer (3) that permeates water, its characterized in that, be provided with in the concrete bearing layer (3) that permeates water and be used for storing water storage device (5) of rainwater and groundwater, utilize water storage device (5) to carry out cleaning device (4) of clearance to the plug, be used for detecting detection automatically cleaning permeates water concrete structure permeability's detection device (7), the control system who is connected with water storage device (5), cleaning device (4) and detection device (7) respectively.
2. The self-cleaning water permeable concrete structure according to claim 1, wherein the detection device (7) comprises a pipeline (11) penetrating through the surface protection layer (1), the water permeable geotextile and the water permeable concrete bearing layer (3), a flow meter (8) for detecting the flow rate of water in the pipeline (11), a flow rate sensing device (9) for detecting the flow rate of water and a water pump (10) for inputting water in the water storage device (5) into the pipeline (11) are arranged on the pipeline (11), and the flow meter (8), the water pump (10) and the flow rate sensing device (9) are respectively connected with the control system.
3. Self-cleaning pervious concrete structure according to claim 1, characterized in that the aggregate particle size in the surface protection layer (1) is smaller than the aggregate particle size in the pervious concrete carrying layer (3).
4. Self-cleaning pervious concrete structure according to claim 1, characterized in that said surface protection layer (1) is provided with a humidity sensing device (6) for detecting surface humidity, said humidity sensing device (6) being connected to said control system.
5. Self-cleaning water permeable concrete structure according to claim 1, characterized in that the composition of the surface protection layer (1) comprises a photocatalytic nanometal oxide and a superhydrophobic nanomineral oxide.
6. The self-cleaning water permeable concrete structure of claim 5, wherein the photocatalytic nano metal oxide is nano TiO2Nano ZnO and nano SnO2One kind of (1).
7. The self-cleaning water permeable concrete structure of claim 5, wherein the superhydrophobic nano inorganic oxide is nano SiO2。
8. Self-cleaning pervious concrete structure according to claim 1, characterized in that said cleaning device (4) is a spraying device.
9. A method for manufacturing a self-cleaning pervious concrete structure according to claim 1, characterized by comprising the steps of: firstly, laying the pervious concrete bearing layer (3), placing pervious geotextile after first rolling, laying the surface protection layer (1) and carrying out second rolling.
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| CN202010602425.5A CN111893836B (en) | 2020-06-29 | 2020-06-29 | Self-cleaning pervious concrete structure and preparation method thereof |
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| CN111893836B CN111893836B (en) | 2021-11-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112982059A (en) * | 2021-02-18 | 2021-06-18 | 贵州民族大学 | Permeable concrete pavement structure and nursing method thereof |
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| CN105203442A (en) * | 2015-10-16 | 2015-12-30 | 山东大学 | In-situ testing instrument and testing method for permeability coefficient of permeable pavement system |
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| CN105625133A (en) * | 2016-03-14 | 2016-06-01 | 合肥工业大学 | Dust-removal drainage macropore asphalt pavement comprising graded crushed stone composite layer |
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