CN114197267B - Steel fiber-imitated recycled aggregate pervious concrete pavement structure - Google Patents
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- CN114197267B CN114197267B CN202111515520.2A CN202111515520A CN114197267B CN 114197267 B CN114197267 B CN 114197267B CN 202111515520 A CN202111515520 A CN 202111515520A CN 114197267 B CN114197267 B CN 114197267B
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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
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind 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
- 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
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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
- E01C11/16—Reinforcements
- E01C11/18—Reinforcements for cement concrete 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
- 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
- E01C11/00—Details of pavings
- E01C11/24—Methods or arrangements for preventing slipperiness or protecting against influences of the weather
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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
- E01C3/00—Foundations for pavings
- E01C3/003—Foundations for pavings characterised by material or composition used, e.g. waste or recycled material
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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
- E01C3/00—Foundations for pavings
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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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
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
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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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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
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- Water Supply & Treatment (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a steel fiber-like recycled aggregate pervious concrete pavement structure, which comprises a plain concrete layer, wherein the plain concrete layer is arranged on a plain soil tamping layer; the water storage layer comprises a pebble layer and a regenerated coarse aggregate layer which are paved on a plain concrete layer; the permeable layer is arranged above the water storage layer and consists of steel fiber-like recycled aggregate permeable concrete, and the steel fiber-like recycled aggregate permeable concrete comprises recycled coarse aggregate and pebbles; the filtering surface layer is paved on the upper surface of the permeable layer; the fixed metal net rack is arranged on the outer side of the pavement structure and wraps each layer; and the water storage tank is arranged on one side of the pavement structure layer. The water storage layer and the water storage tank are utilized to realize the recovery of rainwater, the high-efficiency water permeability of the whole pavement is ensured, and the influence of accumulated water on the ground on walking is avoided, so that the problem that the existing permeable road only permeates rainwater into the foundation without recycling measures is effectively avoided; and the recycled aggregate is used as a pavement structure layer, so that the sustainable development of the building industry is effectively promoted.
Description
Technical Field
The invention relates to the technical field of pavement structure design, in particular to a steel fiber-like recycled aggregate pervious concrete pavement structure.
Background
Along with the acceleration of the urbanization process step in China, the implementation of large-area surface hardening of urban construction land is carried out, and the cities are flooded with water-impermeable buildings such as cement ground, asphalt pavement and the like. Along with the expansion of the waterproof pavement area and the contraction of the urban green land area, the soil rock stratum is compacted, so that the water permeation function of the urban ground is nearly lost.
With the continuous expansion of urban scale in China, the engineering construction is developed rapidly, so that a great amount of construction waste is generated, wherein the waste concrete accounts for 41 percent. The waste concrete has many adverse effects, such as land occupation, serious influence on soil quality, water and air pollution, city appearance influence, potential safety hazard and the like.
Therefore, only by taking the scientific city construction theory as a basis, fully utilizing the waste concrete generated in the urbanization process, paving the breathable ecological concrete pavement, seeking harmony with the nature, realizing the circulation of water resources and possibly solving the increasingly severe urban water control problem.
Disclosure of Invention
The invention aims to provide a steel fiber-like recycled aggregate pervious concrete pavement structure, which can solve the problems of poor water storage property, waste concrete recycling and the like of the existing pervious pavement.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a steel fiber-like recycled aggregate pervious concrete pavement structure, comprising:
a plain concrete layer (1) disposed on the plain soil compacted layer;
the water storage layer (2) consists of a pebble layer (21) and a regenerated coarse aggregate layer (22), and the pebble layer (21) and the regenerated coarse aggregate layer (22) are sequentially paved on the upper surface of the plain concrete layer from bottom to top;
a water permeable layer (3) arranged above the water storage layer; the permeable layer (3) is made of steel fiber-like recycled aggregate permeable concrete, and the steel fiber-like recycled aggregate permeable concrete comprises recycled coarse aggregate and pebbles;
the filtering surface layer (4) is paved on the upper surface of the permeable layer, the filtering surface layer is formed by paving a slag layer with the thickness of 2-3cm and a ceramsite layer with the thickness of 2-3cm from top to bottom, and the pavement paving type is suitable for roads with high content of Suspended Solid (SS) pollution and low heavy metal pollution;
a fixed metal net frame (7) which is arranged outside the pavement structure and wraps each layer;
and the water storage tank (6) is arranged on one side of the pavement structure and has the same height as the pavement structure.
Preferably, the longitudinal section of the water storage layer (2) along the width direction of the road surface is of a V-shaped structure; the water storage layer surface layer (the longitudinal section of the lower bottom surface along the width direction of the pavement) is of a wave-shaped structure.
Preferably, in the V-shaped structure of the water storage layer (2), the gradient close to one side of the water storage tank is 1% -2%, the gradient far away from one side of the water storage tank is 1% -2%, and the height close to one side of the water storage tank is smaller than the height far away from one side of the water storage tank.
Preferably, the fixed metal net rack (7) comprises a horizontal net rack and a vertical net rack, and the vertical net racks are distributed on two sides of the pavement structure and arranged between the lower side of the plain concrete layer (1) and the filtering surface layer (4); the horizontal net rack is arranged on the lower surface of the plain concrete layer (1) and the lower surface of the filtering surface layer (4); and the horizontal net rack is connected with the vertical net rack in a welding manner.
Preferably, the outside of the reservoir (6) is provided with a plurality of valves (5) arranged at intervals of 3-10 m.
Preferably, the thickness of the plain concrete layer (1) is 10-15cm, the thickness of the pebble layer (21) is 10-15cm, the thickness of the regenerated coarse aggregate layer (22) is 15-25cm, the thickness of the water permeable layer (3) is 4-10cm, the thickness of the filter layer (4) is 4-6cm, and the height of the vertical net rack (7) is 35-60cm.
Preferably, the steel fiber-like recycled aggregate pervious concrete is obtained by mixing and uniformly stirring the raw materials, and the raw materials of the steel fiber-like recycled aggregate pervious concrete comprise the following components in parts by weight
Preferably, in the raw material of the pervious concrete of the imitation steel fiber recycled aggregate, the particle size range of the recycled coarse aggregate is 4.5-16.0 mm, the content of needle-shaped and sheet-shaped particles in the recycled coarse aggregate is less than or equal to 10wt.%, the crushing index of the recycled coarse aggregate is less than or equal to 18%, the content of sulfides and sulfates in the recycled coarse aggregate is less than or equal to 1.5wt.%, and the internal irradiation index and the external irradiation index of the recycled coarse aggregate simultaneously satisfy IRa less than or equal to 1.0 and Ir less than or equal to 1.3.
The compressive strength of the steel fiber-like recycled aggregate pervious concrete is C20-C30, and the water permeability coefficient is 2-10 mm/s.
The invention at least comprises the following beneficial effects:
1. according to the invention, the water storage layer is designed into a V shape, so that a part of rainwater can be stored when the rainfall is small, and when the quantity of the rainwater is large, because the two sides of the V-shaped water storage layer have a height difference, the water flow flows out from the right side and enters the water storage tank according to the hydraulic gradient; meanwhile, the water storage layer is designed into a wave-shaped structure to store water as much as possible, and the water in the water storage layer can transpire to the road surface in non-rain high-temperature climate to form microcirculation of water and a breathable functional road surface, so that the floating dust on the road surface is reduced, the temperature of the road surface is reduced, and the urban heat island effect is avoided.
2. The underground road surface structure layer and the water storage tank are communicated, and filtered rainwater is stored in the water storage tank of the permeable road surface unit in a centralized manner, so that the drainage requirement of large rainfall can be met. Meanwhile, the drainage valve is arranged on the right side of the water storage tank, so that rainwater can be uniformly drained to be used by water supply points, and rainwater resources are fully utilized.
3. In the embodiment of the invention, the water storage layer adopts a porous skeleton structure of pebbles and recycled aggregate to form a gap channel, so that road surface accumulated water can flow into the water storage tank through the gap channel in each layer of structure. The water storage layer can be made of concrete buildings and industrial solid wastes (building wastes, coal gangue, steel slag, tailing iron ore and the like), so that the permeable roadbed has better water permeability, water storage property and higher strength, and the comprehensive utilization of the solid wastes and the building wastes in sponge city construction is realized.
4. According to the invention, the fixed metal net rack is arranged in the road surface (the fixed metal net rack is arranged between the plain concrete layer and the filtering surface layer), so that the connection strength of the plain concrete layer, the water storage layer and the permeable layer can be improved, and the vertical load transmitted by the road surface can be converted into partial horizontal thrust by means of the side constraint of the metal net rack, so that the bearing capacity of the road surface layer is improved, and the problems that the surface layer structure of the conventional road surface structure is single, and the bearing capacity of the conventional road surface structure is not structurally improved due to the fact that the bearing capacity of the conventional road surface structure is mainly determined by the quality of materials are solved.
5. According to the preparation method, the raw materials for preparing the steel fiber-like recycled aggregate pervious concrete in the pavement structure mainly comprise recycled coarse aggregates and pebbles, and by means of specific proportioning of the components, on the basis of meeting the requirements of the strength and the water permeability of the pervious concrete, the recycled aggregates are utilized, so that the damage of mined natural stones to the ecological environment is reduced, the damage of construction waste to the environment is reduced, waste is changed into wealth, the secondary utilization of resources and circular economy are realized, and the preparation method has remarkable social benefits; the recycled aggregate can be used for greatly reducing the cost of concrete and generating considerable economic benefit; the permeable concrete paving material can relieve the urban heat island effect, promote the benign development of human living environment, protect the natural environment and maintain ecological balance.
Drawings
FIG. 1 is a schematic longitudinal section view of a pervious concrete pavement structure with steel fiber-like recycled aggregate according to the present invention.
FIG. 2 is a schematic perspective view of a permeable concrete pavement structure with steel fiber-like recycled aggregate according to the present invention.
In the figure: 1. a plain concrete layer; 2. a water storage layer; 21. a pebble layer; 22. regenerating an aggregate layer; 3. a water permeable layer; 4. a filtration surface layer; 5. a valve; 6. a water storage tank; 7. and fixing the metal net rack.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a permeable concrete pavement structure with steel fiber-like recycled aggregate, comprising: a plain concrete layer 1 disposed on the plain soil compacted layer; the water storage layer 2 consists of two parts, and a pebble layer 21 and a regenerated coarse aggregate layer 22 are sequentially paved on the upper surface of the plain concrete layer 1 from bottom to top; the permeable layer 3 is composed of steel fiber-like recycled aggregate permeable concrete and is arranged above the water storage layer 2; the filtering surface layer 4 is paved on the upper surface of the permeable layer 3 and is formed by paving a slag layer with the thickness of 2-3cm and a ceramsite layer with the thickness of 2-3cm from top to bottom; a fixed metal net frame 7 which is arranged outside the pavement structure and wraps each layer; and the water storage tank 6 is arranged on one side of the pavement structure layer.
In the scheme, the surface layer of the water storage layer 2 is distributed in a V shape; the 2 layers of the water storage layer are of wave-shaped structures. The slope of the water storage layer 2 close to the water storage tank is 1% -2%, the slope of the side far away from the water storage tank is 1% -2%, the two sides of the water storage layer 2 with the V-shaped structure have height difference, and when the water volume is large, water in the water storage layer flows into the water storage tank.
The fixed metal net rack 7 comprises a horizontal net rack and a vertical net rack, and the vertical net racks are distributed on two sides of the pavement structure and arranged between the lower side of the plain concrete layer 1 and the filtering surface layer 4; the horizontal net rack is arranged on the lower surface of the plain concrete layer 1 and the lower surface of the filtering surface layer 4; and the horizontal net rack is connected with the vertical net rack in a welding manner.
The water storage tank 6 is positioned on one side of the pavement structure layer, a plurality of valves 5 are arranged on the water storage tank 6, and the valves 5 are arranged at intervals of 3-10 m.
The thickness of plain concrete layer 1 is 10-15cm, the thickness of cobble water storage layer 21 is 10-15cm, the thickness of regeneration coarse aggregate water storage layer 22 is 15-25cm, the thickness of permeable layer 3 is 4-10cm, the thickness of filtering surface layer 4 is 2-6cm, and the height of vertical net rack 7 is 35-60cm.
The steel fiber-like recycled aggregate pervious concrete is prepared by mixing and uniformly stirring the following components in parts by weight:
25 to 36 parts of water permeable reinforcing agent, 1500 to 1700 parts of recycled coarse aggregate, 1500 to 1700 parts of pebbles, 350 to 450 parts of cement, 0.9 to 1.2 parts of steel-like fiber and 110 to 130 parts of water.
Wherein: the water permeability reinforcing agent is an ecological water permeability concrete reinforcing agent produced by Nanjing Jiayuan ecological landscape engineering technology limited company, and other water permeability reinforcing agents can also be adopted; the particle size range of the regenerated coarse aggregate is 4.5-16.0 mm, the content of needle and flaky particles in the regenerated coarse aggregate is less than or equal to 10 wt%, the crushing index of the regenerated coarse aggregate is less than or equal to 18%, the content of sulfide and sulfate in the regenerated coarse aggregate is less than or equal to 1.5 wt%, and the internal irradiation index and the external irradiation index of the regenerated coarse aggregate simultaneously meet the requirements that IRa is less than or equal to 1.0 and Ir is less than or equal to 1.3.
The compressive strength of the pervious concrete of the steel fiber-like recycled aggregate with the composition is C20-C30, and the water permeability coefficient is 2-10 mm/s.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides an imitative steel fiber regeneration aggregate pervious concrete pavement structure which characterized in that: this road surface structure includes:
a plain concrete layer (1) disposed on the plain soil compacted layer;
the water storage layer (2) consists of a pebble layer (21) and a regenerated coarse aggregate layer (22), and the pebble layer (21) and the regenerated coarse aggregate layer (22) are sequentially paved on the upper surface of the plain concrete layer from bottom to top; the longitudinal section of the water storage layer (2) along the width direction of the road surface is in a V-shaped structure; the longitudinal section of the lower bottom surface of the water storage layer along the width direction of the pavement is of a wave-shaped structure;
a permeable layer (3) arranged above the water storage layer; the permeable layer (3) is made of steel fiber-like recycled aggregate permeable concrete, and the steel fiber-like recycled aggregate permeable concrete comprises recycled coarse aggregate and pebbles;
the filtering surface layer (4) is paved on the upper surface of the permeable layer and is formed by paving a slag layer with the thickness of 2-3cm and a ceramsite layer with the thickness of 2-3cm from top to bottom;
a fixed metal net frame (7) which is arranged outside the pavement structure and wraps each layer;
and the water storage tank (6) is arranged on one side of the pavement structure and has the same height as the pavement structure.
2. The steel fiber-like recycled aggregate pervious concrete pavement structure of claim 1, wherein: in the V-shaped structure of the water storage layer (2), the gradient close to one side of the water storage tank is 1% -2%, the gradient far away from one side of the water storage tank is 1% -2%, and the height close to one side of the water storage tank is smaller than the height far away from one side of the water storage tank.
3. The steel fiber-like recycled aggregate pervious concrete pavement structure of claim 1, wherein: the fixed metal net rack (7) comprises a horizontal net rack and a vertical net rack, and the vertical net racks are distributed on two sides of the pavement structure and arranged between the lower side of the plain concrete layer (1) and the filtering surface layer (4); the horizontal net rack is arranged on the lower surface of the plain concrete layer (1) and the lower surface of the filtering surface layer (4); and the horizontal net rack is connected with the vertical net rack in a welding manner.
4. The steel fiber-like recycled aggregate pervious concrete pavement structure of claim 1, wherein: a plurality of valves (5) are arranged on the outer side of the water storage tank (6) at intervals of 3-10 m.
5. The steel fiber-like recycled aggregate pervious concrete pavement structure of claim 3, wherein: the thickness of plain concrete layer (1) is 10-15cm, the thickness of cobble layer (21) is 10-15cm, the thickness of regeneration coarse aggregate layer (22) is 15-25cm, the thickness of permeable bed (3) is 4-10cm, the thickness of filtering surface layer (4) is 4-6cm, the height of fixed metal net rack (7) is 35-60cm.
6. The steel fiber-like recycled aggregate pervious concrete pavement structure of claim 1, wherein: the steel fiber-like recycled aggregate pervious concrete is obtained by mixing and uniformly stirring the raw materials, and the steel fiber-like recycled aggregate pervious concrete comprises the following raw materials in parts by weight
7. The steel fiber-like recycled aggregate pervious concrete pavement structure of claim 6, wherein: in the raw material of the permeable concrete with the steel fiber-like recycled aggregate, the particle size range of the recycled coarse aggregate is 4.5-16.0 mm, the content of needle-shaped and sheet-shaped particles in the recycled coarse aggregate is less than or equal to 10wt.%, the crushing index of the recycled coarse aggregate is less than or equal to 18%, the content of sulfides and sulfates in the recycled coarse aggregate is less than or equal to 1.5wt.%, and the internal irradiation index and the external irradiation index of the recycled coarse aggregate simultaneously meet the requirement that IRa is less than or equal to 1.0 and Ir is less than or equal to 1.3.
8. The steel fiber-like recycled aggregate pervious concrete pavement structure of claim 7, wherein: the compressive strength of the steel fiber-like recycled aggregate pervious concrete is C20-C30, and the water permeability coefficient is 2-10 mm/s.
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