CN112939518B - Pavement structure adhesive, porous concrete base layer and permeable pavement - Google Patents
Pavement structure adhesive, porous concrete base layer and permeable pavement Download PDFInfo
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- CN112939518B CN112939518B CN202110113869.7A CN202110113869A CN112939518B CN 112939518 B CN112939518 B CN 112939518B CN 202110113869 A CN202110113869 A CN 202110113869A CN 112939518 B CN112939518 B CN 112939518B
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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
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
- E01C11/226—Coherent pavings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
- E01C7/142—Mixtures or their components, e.g. aggregate
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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
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The invention relates to a pavement structure adhesive, a porous concrete base layer and a permeable pavement, which is used for solving the problems of lack of breathing property, heat absorption capability, rainwater penetration capability and the like of the impermeable road. The adhesive comprises the following components in percentage by mass: 3.5 to 8.5 percent of resin, 0.02 to 0.0.5 percent of coupling agent, 0.03 to 0.75 percent of toughening agent, 0.05 to 0.65 percent of interface agent, 1.0 to 8.6 percent of water reducing agent and the balance of water. The preparation material of the porous concrete base layer comprises the following components in parts by mass: 140-460 parts of cement, 1250-1960 parts of broken stone, 65-145 parts of water and 5-18 parts of adhesive. The permeable pavement comprises the porous concrete base layer. The technical scheme provided by the invention can enable the underground water to transpire to the road surface to form a microcirculation of water and a breathable functional road surface, reduce the floating dust on the road surface and reduce the temperature of the road surface, thereby avoiding the urban heat island effect.
Description
Technical Field
The invention relates to the technical field of pavement structure design, in particular to a pavement structure adhesive, a porous concrete base layer and a permeable pavement.
Background
In the process of urbanization construction, urban ground surfaces are gradually covered by buildings and impermeable road surfaces, and compared with natural soil, the ecological environment is affected negatively due to the defects that impermeable roads lack breathing property, heat absorption capacity, rainwater infiltration capacity and the like.
Due to the above disadvantages, water-impermeable road surfaces cause a series of environmental problems: rainwater permeating into the ground surface is reduced, and the underground water level is reduced; cause urban inland inundation and generate a 'heat island phenomenon'; the ecological system balance is damaged, and the normal growth of vegetation is influenced.
Therefore, the construction of the breathable ecological concrete pavement seeks harmony with the nature to realize the circulation of water resources, and becomes the main direction of the development of the current novel pavement structure.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide a pavement structure adhesive, a porous concrete base layer and a permeable pavement, which can realize the 'breathing' of the pavement and solve the problem of water circulation.
The embodiment of the invention provides a pavement structure adhesive, which comprises the following components in percentage by mass: 3.5 to 8.5 percent of resin, 0.02 to 8978 percent of coupling agent, 0.03 to 0.75 percent of toughening agent, 0.05 to 0.65 percent of interfacial agent, 1.0 to 8.6 percent of water reducing agent, 85 to 92.5 percent of water and the balance of water.
Further, the resin is water-based epoxy resin, the coupling agent is ethyl trimethoxy silane, the toughening agent is dibutyl phthalate, the interfacial agent is glycidyl ether, and the water reducing agent is a polycarboxylic acid type water reducing agent.
In a second aspect, an embodiment of the present invention provides a porous concrete base layer, where a preparation material of the porous concrete base layer includes, by mass: 140-460 parts of cement, 1250-1960 parts of broken stone, 65-145 parts of water and 5-18 parts of adhesive;
the adhesive is the adhesive of any one of the first aspect.
Further, the porous concrete base layer is of a porous skeleton structure.
Further, the solid content of the adhesive is 1.5-9.5%, and the pH value of the adhesive is 6.5-8.5.
Further, the macadam comprises: one or more of limestone, granite, basalt and andesite.
In a third aspect, an embodiment of the present invention provides a permeable pavement, including: the cellular concrete substrate of the second aspect.
Further, ecological multi-functional concrete road that permeates water still includes: a permeable asphalt structure layer and a permeable roadbed;
the permeable asphalt structure layer is arranged above the porous concrete base layer;
the permeable roadbed is arranged below the porous concrete base layer.
Further, according to the mass percent, the asphalt structure layer that permeates water the asphalt surface course and includes: 25-56% of crushed stone with the particle size of 10-15 mm, 12-28% of crushed stone with the particle size of 5-10 mm, 13-25% of machine-made sand, 1-10% of mineral powder and 4.4-5.2% of asphalt.
Further, the asphalt surface layer that permeates water surface layer asphalt structure layer that permeates water still includes: dye powder;
the dye powder is used for replacing the mineral powder.
Further, according to the mass percent, the permeable roadbed comprises: 15-35% of granular solid with the grain diameter of 10-30 mm, 15-35% of granular solid with the grain diameter of 10-20 mm, 10-30% of granular solid with the grain diameter of 5-10 mm and 20-45% of stone chips;
the particulate solid comprises: one or more of crushed stone, construction solid waste particles and industrial solid waste particles.
Further, ecological multi-functional concrete road that permeates water still includes: a permeable asphalt surface layer permeable asphalt structure layer, a common roadbed and a waterproof roll;
the permeable asphalt surface layer is arranged above the porous concrete base layer;
the waterproof coiled material is arranged below the porous concrete base layer;
the ordinary roadbed is arranged below the waterproof coiled material.
Furthermore, the permeable asphalt structure layer of the permeable asphalt surface layer can be one layer, two layers or three layers.
Compared with the prior art, the invention can realize at least one of the following beneficial effects:
1. according to the embodiment of the invention, the gap channels are formed in the porous skeleton structures of the pavement surface layer, the base layer and the roadbed, so that the accumulated water on the road surface can permeate into the underground or rainwater pipe network system through the gap channels in the structures of each layer, and the underground water can transpire to the road surface in the non-rain high-temperature climate, so that a water microcirculation and breathable functional pavement is formed, the road surface floating dust is reduced, the road surface temperature is reduced, and the urban heat island effect is avoided.
2. Because the permeable asphalt structure layer is a framework-porous structure, the friction coefficient of the permeable asphalt structure layer is larger than that of a conventional compact pavement, so that the frictional resistance of the pavement is increased, the braking distance is shortened by over 10 percent, the driving safety is improved, and the traffic accident rate can be reduced by over 85 percent.
3. The permeable roadbed can be made of concrete buildings and industrial solid wastes (building wastes, coal gangue, steel slag, tailing iron ore, mountain soil and the like), so that the permeable roadbed has good water permeability and water storage performance and high strength, and the comprehensive utilization of the solid wastes and the building wastes in sponge city construction is realized.
4. The pavement structure provided by the embodiment of the invention has good freeze-thaw resistance and fatigue resistance, and water can not cause pavement water damage and base layer softening after permeating into the structural layer and the base layer, so that the pavement can not be subjected to integral structural collapse and damage. The porous rainwater that makes each layer structure can flow into drainage system and discharge through drainage system, therefore each layer structure inside ponding volume is few or even not ponding, and each layer structure is difficult to produce frost heaving destruction. In conclusion, the embodiment of the invention provides the pavement with excellent anti-freezing and anti-fatigue performances, thereby having longer service life.
5. In the embodiment of the invention, the performance indexes of each layer structure of the pavement are that the Marshall stability is not less than 5kN, the Kentuberg scattering loss is less than 15%, the dynamic stability is not less than 5000 times/min, the soaking Marshall residual stability is not less than 85%, and the freeze-thaw splitting residual stability is not less than 80%. 28d compressive strength of porous ecological concrete: 5 MPa-35 MPa, the frost resistance is not reduced after 56 cycles of strength, and the fatigue life reaches 995937 times when the stress level is 0.6.
6. The surface layer of the permeable pavement is doped with the dye powder, and the pavement with different colors can be paved.
7. The pavement provided by the embodiment of the invention can be used for high-grade highways, urban roads, garden roads, squares, pedestrian streets and the like, and has strong applicability.
8. In the embodiment of the invention, the porous concrete base layer is cured by laying the plastic film without other auxiliary means such as moisture preservation and the like, so that the process is simplified.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings, in which like reference numerals refer to like parts throughout, are for the purpose of illustrating particular embodiments only and are not to be considered limiting of the invention.
FIG. 1 is a schematic structural view of a permeable pavement according to an embodiment of the present invention;
fig. 2 is a schematic structural view of another permeable pavement provided by an embodiment of the invention.
Description of the drawings:
a-a permeable asphalt structure layer; b-a porous concrete base layer; c-permeable roadbed; d-waterproof roll material; e-ordinary roadbed.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention and not to limit its scope.
The invention discloses a permeable pavement, as shown in figure 1, a pavement structure layer is divided into: a permeable asphalt structure layer A, a porous concrete base layer B and a permeable roadbed C.
Wherein, the asphalt structure layer A that permeates water comprises each component: 25-56% of crushed stone with the particle size of 10-15 mm, 12-28% of crushed stone with the particle size of 5-10 mm, 13-25% of machine-made sand, 1-10% of mineral powder and 4.4-5.2% of asphalt. And replacing the mineral powder with dye powder if the colored asphalt pavement is the colored asphalt pavement, wherein the mass percent of the dye powder is the same as that of the mineral powder. Through the design of the component mixing ratio, the mineral aggregate graded macadam of the asphalt mixture can not only form a large number of communicated pores in the water-permeable asphalt structure layer A, but also effectively control the porosity and the concrete mechanical property, so that the technical indexes of the water-permeable asphalt structure layer A meet the Marshall stability of not less than 5kN, the Kentusburg scattering loss of less than 15%, the dynamic stability of not less than 5000 times/min, the water-soaked Marshall residual stability of not less than 85%, and the split freeze-thaw residual stability of not less than 80%.
Specifically, the broken stones with the particle size of 5mm-10mm and the machine-made sand can fill part of gaps of the broken stones with the particle size of 10mm-15mm to form pores of a framework-suspension structure, and the porosity in the permeable asphalt structure layer A can be controlled through reasonable mineral aggregate grading design.
In the embodiment of the invention, in order to ensure that the permeable asphalt structure layer A has good performance, the asphalt added into the permeable asphalt structure layer A is modified by the composite rubber modified asphalt instead of the waste rubber powder, so that the permeable asphalt structure layer A has good technical indexes in high and low temperature performances such as ductility, penetration, softening point, toughness and the like.
Specifically, the technical performance indexes of the composite rubber modified asphalt meet the requirements of a penetration degree of 30cm-60cm at 25 ℃, an extensibility of not less than 40cm at 5 ℃ and a softening point of not less than 75 ℃. The composite rubber modified asphalt comprises the following components in percentage by mass: ethylene propylene diene monomer: natural rubber: SBS: anti-aging agent: a stabilizer: matrix asphalt =2.2% -6.8%: 2.0% -3.6%: 2.5% -7.8%: 0.1% -1.0%: 0.2% -1.8%: 86 to 95 percent.
In the embodiment of the invention, if the pavement is colored, the mineral powder can be replaced by dye, the asphalt (black) in the permeable asphalt structure layer A can be replaced by colored modified asphalt and the dye powder is added, so that the pavement is changed into different colors, and meanwhile, the permeable asphalt structure layer A can be ensured to have good technical indexes on high and low temperature performances such as ductility, penetration, softening point, toughness and the like, and the technical indexes all meet technical specification for designing and constructing the drainage asphalt pavement (JTG/T3350-03-2020).
Specifically, the technical performance indexes of the color modified asphalt meet the requirements of a penetration degree of 30cm-60cm at 25 ℃, an extensibility of not less than 20cm at 5 ℃ and a softening point of not less than 70 ℃. The color modified asphalt comprises the following components in percentage by mass: resin: EVA: polyethylene: TPE: SBS: anti-aging agent for modified asphalt: anti-ultraviolet agent: PVC stabilizer: compatibilizer =25% to 65%:2.2% -3.3%: 2.0% -3.0%: 4.5% -8.8%: 2.1% -3.0%: 0.1% -1.0%: 0.05% -0.2%: 0.1% -0.8%: 50 to 67 percent. The dye is inorganic or organic pigment, and has high temperature resistance, ultraviolet resistance and no color change. Wherein the resin comprises: petroleum resin and compatilizer including solvent oil.
In the embodiment of the invention, the porous concrete base layer B comprises the following components in percentage by weight: 140-460kg of cement, 1250-1960 kg of broken stone, 65-145 kg of water and 5-18 kg of adhesive. Wherein, the adhesive is a plastic polycarboxylic acid composite cement modifier, and the adhesive comprises the following components: resin: coupling agent: a toughening agent: an interface agent: water reducing agent: water =3.5% to 8.5%:0.02% -0.0.5%: 0.03% -0.75%: 0.05% -0.65%: 1.0% -8.6%: 85 to 92.5 percent. Wherein the resin is water-based epoxy resin, the coupling agent is ethyl trimethoxy silane, the toughening agent is dibutyl phthalate, the interface agent is glycidyl ether, and the water reducing agent is a polycarboxylic acid type water reducing agent.
The crushed stone can be limestone, granite, basalt, andesite and other hard crushed stones. Due to the irregular shape of the crushed stones and the point contact between the crushed stones, the cement paste usually bonds one or more crushed stones together, so that a plurality of strip-shaped structures are obtained. The cement slurry then bonds these strip-like structures into a "saqima" type framework-cellular structure, resulting in a cellular concrete base with a large number of pores. And controlling the porosity of the porous concrete base layer B by utilizing graded broken stones when preparing the porous concrete base layer B as the permeable asphalt structure layer. In addition, a paver is selected to vibrate and form the porous concrete base layer so as to further improve the porosity of the porous concrete base layer.
In the embodiment of the invention, the adhesive in the porous concrete base layer B is a plastic polycarboxylic acid composite cement modifier, and the adhesive can further complete cement secondary hydration reaction, enhance the compactness and the cohesive force of a cement paste film and ensure the freeze-thaw resistance, the fatigue resistance and the compressive strength of concrete. The solid content of the adhesive is 1.5-9.5%, the pH value is 6.5-8.5, and the adhesive is even in dilution and dispersion degree in water and is not isolated.
In the embodiment of the invention, the permeable roadbed C comprises the following components: 15-35% of granular solid with the grain diameter of 10-30 mm, 15-35% of granular solid with the grain diameter of 10-20 mm, 10-30% of granular solid with the grain diameter of 5-10 mm and 20-45% of stone chips. Wherein the solid particles can be crushed stone (gravel), building or industrial solid waste. Specifically, construction or industrial solid waste includes: one or more of construction waste, coal gangue, steel slag, tail iron ore and mountain soil.
In practical application, many scenes need to use a common roadbed, wherein the common roadbed comprises the following components: 8-25% of crushed stone with the particle size of 10-30 mm, 11-30% of crushed stone with the particle size of 10-20 mm, 21-41% of crushed stone with the particle size of 5-10 mm and 28-40% of stone chippings. If water enters the ordinary roadbed, the internal structure of the roadbed is eroded by the water, so that the mechanical property of the roadbed is greatly reduced. In order to ensure that water does not enter the roadbed, a waterproof layer is paved on the common roadbed. In order to solve the above problems, an embodiment of the present invention provides another ecological water-permeable multifunctional concrete pavement, as shown in fig. 2, which sequentially comprises, from top to bottom: a permeable asphalt structure layer A, a porous concrete base layer B, a waterproof coiled material D and a common roadbed E. Rainwater gathers and collects the waterproofing membrane D through the pores of the permeable asphalt structure layer A and the porous concrete base layer B, and water seeping to the waterproofing membrane D gathers and is discharged into a sewer system through the waterproofing membrane D, so that the rainwater is prevented from corroding the common roadbed. Wherein, waterproofing membrane technical indicator: the burst strength of CBR is more than or equal to 1.1kN, the breaking strength is more than or equal to 5.0kN/m, and the elongation is 30-100%.
In order to better illustrate the technical solution in the embodiments of the present invention, the following embodiments are given, the structures of embodiments 1 and 4 refer to fig. 2, the structure of embodiment 7 refers to fig. 2, and the structures of embodiments 2, 3, 5 and 6 refer to fig. 1 and fig. 2.
Example 1 application to freeways or level one highways
The pavement structure top-down does in proper order: 4cm of permeable asphalt structure layer surface layer, 5cm of permeable asphalt structure layer middle surface layer, 8cm of permeable asphalt structure layer lower surface layer, 36cm of porous concrete base layer, waterproof coiled material and common roadbed.
The permeable asphalt structure layer surface layer comprises the following components: 10-15 mm crushed stone: 5-10 mm crushed stone: and (3) machining sand: mineral powder =36%:32%:26.2%:5.8 percent and the oil stone ratio is 5.1 percent.
The composition of the surface layer in the permeable asphalt structure layer is as follows: 10-20 mm of crushed stone: 10-15 mm crushed stone: 5-10 mm crushed stone: and (3) sand making by machine: mineral powder =24%:28.5%:19%:24%:3.5 percent and the oil-stone ratio is 4.5 percent.
The composition of the lower surface layer of the permeable asphalt structure layer is as follows: 10-20 mm of crushed stone: 10-15 mm crushed stone: 5-10 mm crushed stone: and (3) sand making by machine: mineral powder =22%:33%:18%:24%:3 percent and the oil-stone ratio is 4.4 percent.
The composition and structure of the porous concrete base layer are as follows: 340kg of cement; 1900kg of 10-30 mm crushed stone; 115kg of water; 12kg of adhesive.
The technical performance indexes are as follows:
the Marshall stability of the permeable asphalt structure layer is 8.5kN, the porosity is 20.2%, the soaking Marshall residual stability is 95.6%, the freeze-thaw cleavage residual stability is 92.8%, the Kentuberg scattering loss is 11.6%, and the dynamic stability is 5460 times/min.
The water permeable middle surface layer stability is 8.1kN, the porosity is 22.0%, the water immersion Marshall residual stability is 94.1%, the freeze-thaw cleavage residual stability is 92.5%, the Kentusburg scattering loss is 12.3%, and the dynamic stability is 5534 times/min.
The stability of the permeable lower layer is 7.9kN, the porosity is 21.8%, the soaking Marshall residual stability is 91.5%, the freeze-thaw cleavage residual stability is 90.2%, the Kentuurg scattering loss is 13.2%, and the dynamic stability is 5589 times/min.
The porosity of the porous concrete base layer is 24.8 percent, the 28d compressive strength is 18.8MPa, and the dry shrinkage coefficient is 8.35 multiplied by 10 -6 Temperature coefficient of contraction 2.09 μm/m/deg.C, compression strength after 56 cycles of frost resistance/unfrozen compression strength =0.995.
Waterproof roll material: the burst strength of CBR is more than or equal to 1.1kN, the breaking strength is more than or equal to 5.0kN/m, and the elongation is 30-100%.
Example 2 application to Secondary highways
The pavement structure top-down does in proper order: 3cm pervious asphalt structure layer surface layer +4cm pervious asphalt structure layer lower surface layer +25cm porous concrete base layer + waterproof roll + common roadbed, or 3cm pervious asphalt structure layer surface layer +4cm pervious asphalt structure layer lower surface layer +25cm porous concrete base layer +18cm graded broken stone layer.
The permeable asphalt structure layer surface layer comprises the following components: 5-10 mm crushed stone: 3-6 mm crushed stone: and (3) sand making by machine: mineral powder =37.5%:47.8%:8.4%:6.3 percent and the oil-stone ratio is 4.8 percent.
The composition of the lower surface layer of the permeable asphalt structure layer is 10-20 mm of broken stone: 10-15 mm crushed stone: 5-10 mm crushed stone: and (3) machining sand: mineral powder =24%:28.5%:19%:24%:3.5 percent and the oil-stone ratio is 4.5 percent.
The porous concrete base layer comprises the following components: 320kg of cement; 1635kg of 10-30 mm broken stone; 100kg of water; 11kg of adhesive.
The 18 cm-grade graded broken stone layer is a permeable roadbed, and the permeable roadbed comprises the following material components: 10-30 mm crushed stone: 10-20 mm of crushed stone: 5-10 mm crushed stone: stone chips =21%:21%:20%:38% and CBR132%.
The technical performance indexes are as follows:
the Marshall stability of the surface layer of the permeable asphalt structure layer is 7.5kN, the porosity is 19.8%, the Marshall residual stability in water immersion is 93.1%, the freeze-thaw cleavage residual stability is 91.6%, the Kentusburg scattering loss is 11.6%, and the dynamic stability is 5312 times/min.
The stability of the lower layer of the permeable asphalt structure layer is 7.1kN, the porosity is 21.3%, the water immersion Marshall residual stability is 92.0%, the freeze-thaw cleavage residual stability is 90.6%, the Kentusburg scattering loss is 12.5%, and the dynamic stability is 5289 times/min.
The porosity of the porous concrete base layer is 23.2 percent, the 28d compressive strength is 12.3MPa, and the dry shrinkage coefficient is 8.3 multiplied by 10 -6 Temperature coefficient of contraction 2.07 μm/m/deg.C, compression strength after 56 cycles of frost resistance/unfrozen compression strength =0.986.
Waterproof roll material: the burst strength of CBR is more than or equal to 1.1kN, the breaking strength is more than or equal to 5.0kN/m, and the elongation is 30-100%.
Example 3 application to other highways
The pavement structure sequentially comprises from top to bottom: 4cm pervious asphalt structure layer +20cm porous concrete base layer + waterproof roll + common roadbed, or 3cm pervious asphalt structure layer +20cm porous concrete base layer +16cm graded broken stone layer.
The permeable asphalt structure layer comprises the following components: 5-10 mm crushed stone: 3-6 mm crushed stone: and (3) machining sand: mineral powder =37.5%:47.8%:8.4%:6.3 percent and the oil-stone ratio is 4.8 percent.
The porous concrete base layer comprises the following components: 300kg of cement; 1600kg of 10-20 mm crushed stone; 100kg of water; 10kg of adhesive.
The 16 cm-grade rubble layer is a permeable roadbed, and the permeable roadbed comprises the following material components: the material components of the permeable roadbed: 10-30 mm crushed stone: 10-20 mm of crushed stone: 5-10 mm crushed stone: stone chips =23%:24%:28%:25% and CBR121%.
The technical performance indexes are as follows:
the Marshall stability of the permeable asphalt structure layer is 6.2kN, the porosity is 21.6%, the Marshall residual stability in water immersion is 90.2%, the residual stability in freeze-thaw splitting is 88.6%, the scattering loss of Kentusburg is 13.6%, and the dynamic stability is 5223 times/min.
The porosity of the porous concrete base layer is 24.0 percent, the 28d compressive strength is 11.8MPa, and the dry shrinkage coefficient is 8.2 multiplied by 10 -6 Temperature coefficient of contraction 2.05 μm/m/deg.C, compression strength after 56 cycles of frost resistance/unfrozen compression strength =0.957.
Waterproof roll material: the burst strength of CBR is more than or equal to 1.1kN, the breaking strength is more than or equal to 5.0kN/m, and the elongation is 30-100%.
Embodiment 4, apply to urban arterial road
The pavement structure top-down does in proper order: 4cm of permeable asphalt structure layer surface layer, 5cm of permeable asphalt structure layer lower surface layer, 36cm of porous concrete base layer, waterproof coiled material and common roadbed.
The permeable asphalt structure layer surface layer comprises the following components: 10-15 mm crushed stone: 5-10 mm crushed stone: and (3) machining sand: mineral powder =35%:31%:28.4%:5.6 percent and the oil-stone ratio is 4.8 percent.
The composition of the lower surface layer of the permeable asphalt structure layer is as follows: 10-20 mm crushed stone: 10-15 mm crushed stone: 5-10 mm crushed stone: and (3) sand making by machine: mineral powder =24%:28.5%:19%:24%:3.5 percent and the oil-stone ratio is 4.5 percent.
The porous concrete base layer comprises the following components: 320kg of cement; 1750kg of 10-20 mm crushed stone; 115kg of water; 11.6 kg of adhesive.
The technical performance indexes are as follows:
the Marshall stability of the surface layer of the permeable asphalt structure layer is 7.8kN, the porosity is 20.8%, the Marshall residual stability in water immersion is 93.5%, the freeze-thaw cleavage residual stability is 92.6%, the Kentusburg scattering loss is 12.5%, and the dynamic stability is 5420 times/min.
The stability of the lower layer of the permeable asphalt structure layer is 7.5kN, the porosity is 21.8%, the soaking Marshall residual stability is 92.2%, the freeze-thaw cleavage residual stability is 90.5%, the Kentuberg scattering loss is 12.3%, and the dynamic stability is 5309 times/min.
The porosity of the porous concrete base layer is 22.2 percent, the 28d compressive strength is 16.3MPa, and the dry shrinkage coefficient is 8.22 multiplied by 10 -6 Temperature coefficient of contraction 2.06 μm/m/deg.C, compression strength after 56 cycles of frost resistance/unfrozen compression strength =0.987.
Waterproof roll material: the burst strength of CBR is more than or equal to 1.1kN, the breaking strength is more than or equal to 5.0kN/m, and the elongation is 30-100%.
Example 5 application to urban Secondary road
The pavement structure sequentially comprises from top to bottom: the waterproof roadbed comprises a 3cm permeable asphalt structure layer (color) +4cm permeable asphalt structure layer +20cm porous concrete base layer + waterproof rolls + common roadbed, or a 3cm permeable asphalt structure layer (color) +4cm permeable asphalt structure layer +20cm porous concrete base layer +18cm graded broken stone layer.
The permeable asphalt structure layer (color) comprises the following components: 5-10 mm crushed stone: 3-6 mm crushed stone: and (3) sand making by machine: mineral powder =37.5%:47.8%:8.4%:6.3 percent and the oil stone ratio is 4.8 percent.
The permeable asphalt structure layer comprises the following components: 10-20 mm of crushed stone: 10-15 mm crushed stone: 5-10 mm crushed stone: and (3) machining sand: mineral powder =24%:28.5%:19%:24%:3.5 percent and the oil-stone ratio is 4.5 percent.
The porous concrete base layer comprises the following components: 300kg of cement; 1635kg of 10-30 mm broken stone; 100kg of water; 11kg of adhesive.
The 18 cm-grade rubble layer is a permeable roadbed, and the permeable roadbed comprises the following material components: 10-30 mm crushed stone: 10-20 mm of crushed stone: 5-10 mm crushed stone: stone chips =21%:21%:20%:38% and CBR132%.
The technical performance indexes are as follows:
the (color) Marshall stability of the permeable asphalt structure layer is 6.9kN, the porosity is 20.2%, the soaking Marshall residual stability is 91.1%, the freeze-thaw cleavage residual stability is 90.0%, the Kentusburg scattering loss is 12.4%, and the dynamic stability is 5360 times/min.
The stability of the permeable asphalt structure layer is 6.6kN, the porosity is 21.2%, the soaking Marshall residual stability is 92.7%, the freeze-thaw cleavage residual stability is 91.2%, the Kentusburg scattering loss is 12.0%, and the dynamic stability is 5410 times/min.
The porosity of the porous concrete base layer is 20.8 percent, the 28d compressive strength is 14.5MPa, and the dry shrinkage coefficient is 8.0 multiplied by 10 -6 Temperature coefficient of contraction 2.01 μm/m/deg.C, compression strength after 56 cycles of frost resistance/unfrozen compression strength =0.982.
Waterproof roll material: the burst strength of CBR is more than or equal to 1.1kN, the breaking strength is more than or equal to 5.0kN/m, and the elongation is 30-100%.
Embodiment 6, applied to garden roads
The pavement structure top-down does in proper order: the waterproof roadbed comprises a 3cm permeable asphalt structure layer (color) +15cm porous concrete base layer + waterproof rolls + common roadbed, or a 3cm permeable asphalt structure layer (color) +15cm porous concrete base layer +16cm graded broken stone layer.
The permeable asphalt structure layer (color) comprises the following components: 5-10 mm crushed stone: 3-6 mm crushed stone: and (3) machining sand: mineral powder =37.5%:47.8%:8.4%:6.3 percent and the oil stone ratio is 4.8 percent.
The porous concrete base layer comprises the following components: 280kg of cement; 1700kg of 20-30 mm crushed stone; 100kg of water; 9kg of adhesive.
The 16 cm-grade rubble layer is a permeable roadbed, and the permeable roadbed comprises the following material components: 10-30 mm crushed stone: 10-20 mm of crushed stone: 5-10 mm crushed stone: stone chips =28%:16%:19%:37% and CBR186%.
The technical performance indexes are as follows:
the (colored) Marshall stability of the water-permeable asphalt structure layer is 6.5kN, the porosity is 24.0 percent, the soaking Marshall residual stability is 88.5 percent, the freeze-thaw cleavage residual stability is 87.0 percent, the Kentusburg scattering loss is 13.5 percent, and the dynamic stability is 5266 times/min.
The porosity of the porous concrete base layer is 23.7 percent, the 28d compressive strength is 12.8MPa, and the dry shrinkage coefficient is 8.1 multiplied by 10 -6 Temperature coefficient of contraction 2.00 μm/m/deg.C, compression strength after 56 cycles of frost resistance/unfrozen compression strength =0.980.
Example 7 application to sidewalks, parks, squares, and the like
The pavement structure top-down does in proper order: 3cm pervious asphalt structure layer (color) +15cm porous concrete base layer +16cm graded crushed stone layer.
The permeable asphalt structure layer (color) comprises the following components: 5-10 mm crushed stone: 3-6 mm crushed stone: and (3) machining sand: mineral powder =38.0%:48.0%:8.0%:6.0 percent and the oil-stone ratio is 4.6 percent.
The porous concrete base layer comprises the following components: 260kg of cement; 1650kg of 10-20 mm crushed stone; 100kg of water; 8.5kg of adhesive.
The 16 cm-grade rubble layer is a permeable roadbed, and the permeable roadbed comprises the following material components: 10-30 mm crushed stone: 10-20 mm of crushed stone: 5-10 mm crushed stone: stone chips =28%:16%:19%:37% and CBR186%.
The technical performance indexes are as follows: the (colored) Marshall stability of the permeable asphalt structure layer is 6.5kN, the porosity is 23.0 percent, the soaking Marshall residual stability is 90.5 percent, the freeze-thaw cleavage residual stability is 89.4 percent, the Kentusburg scattering loss is 13.3 percent, and the dynamic stability is 5233 times/min.
The porosity of the porous concrete base layer is 23.8 percent, the 28d compressive strength is 10.2MPa, and the dry shrinkage coefficient7.95×10 -6 Temperature coefficient of contraction 1.95 μm/m/deg.C, compression strength after 56 cycles of freezing resistance/unfrozen compression strength =0.979.
Waterproof roll material: the burst strength of CBR is more than or equal to 1.1kN, the breaking strength is more than or equal to 5.0kN/m, and the elongation is 30-100%.
Technical indices achieved for examples 1-7:
a permeable asphalt structure layer A: the Marshall stability is not less than 5kN, the porosity is 18-30%, the Kentuckberg scattering loss is less than 15%, the dynamic stability is not less than 5000 times/min, the water-soaking Marshall residual stability is not less than 85%, and the freeze-thaw cleavage residual stability is not less than 80%.
Porous concrete base layer B: has good water permeability, dry temperature shrinkage, freezing resistance, fatigue resistance and mechanical properties. Porosity 20.8% -24.8%, 28d compressive strength: 8 MPa-35 MPa, and the dry shrinkage coefficient is 7.95 multiplied by 10 -6 ～8.2×10 -6 The temperature shrinkage coefficient is 1.95 mu m/m/DEG C-2.09 mu m/m/DEG C, the frost resistance is not reduced after 56 cycles of strength, and the fatigue life reaches 995937 times when the stress level is 0.6.
And (3) permeable roadbed C: CBR is not less than 100%.
Waterproof roll D: the burst strength of CBR is more than or equal to 1.1kN, the breaking strength is more than or equal to 5.0kN/m, and the elongation is 30-100%.
And (3) common roadbed E:7d unconfined compressive strength is not less than 3.5MPa.
In addition, the permeable asphalt structure layers (colored) in examples 1 to 7 all used colored modified asphalt instead of black modified asphalt.
The porosity of the existing compact waterproof pavement is usually less than 6%, and in the embodiment of the invention, the porosity of the permeable asphalt structure layer A is not less than 18%, and the porosity of the porous concrete base layer B is not less than 20%, which are both more than 6%. Therefore, the technical scheme provided by the embodiment of the invention can enable the surface gathered water to permeate into the permeable roadbed and then enter the underground through the permeable roadbed or enable the surface gathered water to permeate into the waterproof coiled material and then enter the underground through the drainage system connected with the waterproof coiled material. Meanwhile, underground water can be transpired to the road surface in the same way to form microcirculation of water and a breathable functional road surface, so that the temperature of the road surface is reduced, and the urban heat island effect is avoided.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (8)
1. The pavement structure adhesive is characterized by comprising the following components in percentage by mass: 3.5 to 8.5 percent of resin, 0.02 to 0.05 percent of coupling agent, 0.03 to 0.75 percent of toughening agent, 0.05 to 0.65 percent of interfacial agent, 1.0 to 8.6 percent of water reducing agent and the balance of water;
the resin is water-based epoxy resin, the coupling agent is ethyl trimethoxy silane, the toughening agent is dibutyl phthalate, the interface agent is glycidyl ether, and the water reducing agent is a polycarboxylic acid type water reducing agent.
2. The porous concrete base layer is characterized in that the preparation material of the porous concrete base layer comprises the following components in parts by mass: 140-460 parts of cement, 1250-1960 parts of broken stone, 65-145 parts of water and 5-18 parts of adhesive;
the adhesive is the adhesive of claim 1;
the porous concrete base layer is of a porous skeleton structure;
the particle size of the crushed stone is 20-30 mm; the gravel comprises: one or more of limestone, granite, basalt and andesite.
3. The porous concrete base layer according to claim 2, wherein the solid content of the adhesive is 1.5-9.5%, and the pH of the adhesive is 6.5-8.5.
4. The permeable pavement is characterized in that the permeable pavement is an ecological permeable multifunctional concrete pavement; the ecological multifunctional concrete pavement that permeates water includes: a porous concrete substrate according to claim 2 or 3; the asphalt road further comprises a permeable asphalt structure layer and a permeable roadbed;
the permeable asphalt structure layer is arranged above the porous concrete base layer; the permeable roadbed is arranged below the porous concrete base layer;
the permeable asphalt structure layer comprises the following components in percentage by mass: 25-56% of broken stone with the particle size of 10-15 mm, 12-28% of broken stone with the particle size of 5-10 mm, 13-25% of machine-made sand, 1-10% of mineral powder and 4.4-5.2% of asphalt;
the asphalt is composite rubber modified asphalt, and the technical performance indexes of the composite rubber modified asphalt meet the requirements of a penetration degree of 30cm-60cm at 25 ℃, an extensibility of not less than 40cm at 5 ℃ and a softening point of not less than 75 ℃; the composite rubber modified asphalt comprises the following components in percentage by mass: ethylene propylene diene monomer: natural rubber: SBS: anti-aging agent: a stabilizer: matrix asphalt =2.2% -6.8%: 2.0% -3.6%: 2.5% -7.8%: 0.1% -1.0%: 0.2% -1.8%: 86 to 95 percent.
5. A pavement surface according to claim 4,
the asphalt structure layer that permeates water still includes: dye powder;
the dye powder is used for replacing the mineral powder.
6. A pavement surface according to claim 4,
according to the mass percentage, the permeable roadbed comprises: 15-35% of granular solid with the grain diameter of 10-30 mm, 15-35% of granular solid with the grain diameter of 10-20 mm, 10-30% of granular solid with the grain diameter of 5-10 mm and 20-45% of stone chips;
the particulate solid comprises: one or more of crushed stone, construction solid waste particles and industrial solid waste particles.
7. A permeable pavement comprising the cellular concrete base layer of claim 3, and further comprising: a permeable asphalt structure layer, a common roadbed and a waterproof coiled material;
the permeable asphalt structure layer is arranged above the porous concrete base layer;
the waterproof coiled material is arranged below the porous concrete base layer;
the ordinary roadbed is arranged below the waterproof coiled material.
8. The pavement of claim 7, wherein the permeable asphalt structure layer is one layer, two layers or three layers.
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