CN110184877B - Sponge urban ecological treatment road system and construction method thereof - Google Patents
Sponge urban ecological treatment road system and construction method thereof Download PDFInfo
- Publication number
- CN110184877B CN110184877B CN201910470909.6A CN201910470909A CN110184877B CN 110184877 B CN110184877 B CN 110184877B CN 201910470909 A CN201910470909 A CN 201910470909A CN 110184877 B CN110184877 B CN 110184877B
- Authority
- CN
- China
- Prior art keywords
- parts
- layer
- concrete layer
- water
- base layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a sponge urban ecological treatment road system which sequentially comprises a base layer impermeable concrete layer, a first permeable concrete layer, a melon seed layer, a second permeable concrete layer and a permeable asphalt pavement layer from bottom to top, wherein a reinforcing mesh is arranged between the base layer impermeable concrete layer and the first permeable concrete layer, a mesh cloth is arranged above the reinforcing mesh, drainage ditches are arranged on two sides of the surface of the base layer impermeable concrete layer, a plurality of parallel micro-arch drainage grooves communicated with the drainage ditches are formed in the middle of the surface of the base layer impermeable concrete layer, the drainage ditches are communicated with a rainwater temporary storage chamber, the rainwater temporary storage chamber is communicated with a water purifying device, and rainwater enters a reuse storage chamber after being purified by the water purifying device. This road system has still guaranteed intensity, the wearability of road when having promoted the road rate of permeating water, is particularly suitable for urban town road, and effectual sponge urban road of having solved leads to the frequent problem of maintenance because of permeating water and intensity are difficult to balance.
Description
Technical Field
The invention belongs to the technical field of roads, and relates to a sponge urban ecological treatment road system and a construction method thereof.
Background
At present, most of urban roads are made of asphalt concrete materials, and the air impermeability and the water impermeability of asphalt concrete pavements directly cause moisture and precipitation in the air to be incapable of directly penetrating through the concrete pavements to enter the soil, so that surface plants are directly caused to grow healthily or wither and die due to lack of moisture, the moisture and the heat of the air are difficult to be in virtuous circle with the surface, the surface temperature is increased, and a 'heat island effect' is generated. Most importantly, the difficulty in draining water of the road surface in rainy seasons is caused by the impermeability and the air impermeability of the concrete road surface, and the problem of water accumulation on the road surface is difficult to solve by only depending on drainage facilities if a large amount of rainfall occurs in a short time, so that the comfort of driving on the road surface is greatly reduced, the traveling danger of pedestrians in rainy days is increased, and great hidden dangers are brought to road traffic and social safety.
The sponge city, namely the city, can be like a sponge, has good elasticity in the aspects of adapting to environmental changes, coping with natural disasters and the like, absorbs water, stores water, seeps water and purifies water when raining, and releases and utilizes the stored water when needed. The urban ecological system function is promoted and the urban flood disaster is reduced. The sponge city substantive application shows that the road system has excellent performances of water permeability, pressure resistance, wear resistance, skid resistance, environmental protection, comfort, easy maintenance, heat absorption, noise reduction and the like, and can effectively relieve the urban heat island effect. The pervious concrete is also called porous concrete, has the advantages of air permeability, water seepage, heat absorption, noise reduction and the like due to the honeycomb structure, and plays an irreplaceable role in building sponge cities. However, the technical development of the pervious concrete road is still immature, the pervious concrete road in the prior art has many defects, a common pervious concrete road structure sequentially comprises a soil road base layer, a pervious concrete layer and a surface layer from bottom to top, the strength is insufficient, the durability is poor, when the load reaches a certain degree, the rigid material of the pervious concrete road is easy to damage, and the strength of the soil road base layer is insufficient to bear the stress transmitted from the upper layer; in addition, after the rainwater passes through the permeable concrete layer, the rainwater is in contact with the soil road base layer, the soil road base layer is damaged due to the corrosivity of the rainwater, and once the base layer is damaged, the road surface layer above the base layer is easy to collapse to form pits and the like. The general repair needs to be integrally cut off for repair, is very inconvenient, has long service life even under the condition of light load, and is not more suitable for large-area roads such as urban roads, expressways and the like with high load. Therefore, in view of the defects that the water permeability and the strength of the existing permeable concrete road are difficult to balance, and more frequent maintenance is needed compared with the common concrete road surface, and the like, a permeable concrete road system with excellent performance is urgently needed to be researched, the service life of the road is prolonged, and the method has great practical significance for popularization of the permeable concrete road and improvement of the overall ecological environment of the city.
Disclosure of Invention
The invention provides a sponge urban ecological treatment road system, which improves the water permeability of a road, ensures the strength and the wear resistance of the road, is particularly suitable for urban municipal roads, and effectively solves the problem of frequent maintenance of the sponge urban road due to difficulty in balancing the water permeability and the strength.
In order to achieve the purpose, the invention adopts the technical scheme that:
a sponge urban ecological treatment road system sequentially comprises a base layer impermeable concrete layer, a first permeable concrete layer, a melon seed layer, a second permeable concrete layer and a permeable asphalt pavement layer from bottom to top, wherein a reinforcing mesh is arranged between the base layer impermeable concrete layer and the first permeable concrete layer, a mesh cloth is arranged above the reinforcing mesh, drainage ditches are arranged on two sides of the surface of the base layer impermeable concrete layer, a plurality of mutually parallel micro-arch drainage grooves communicated with the drainage ditches are formed in the middle of the surface of the base layer impermeable concrete layer, the drainage ditches are communicated with a rainwater temporary storage chamber, the rainwater temporary storage chamber is communicated with a water purifying device, and rainwater enters a recycling storage chamber after being purified by the water purifying device; the drainage ditch cross-section is U type structure, and the drainage ditch bottom flushes with basic unit impervious concrete layer upper surface, and the drainage ditch is different with ordinary road drainage ditch to lean on one side of road to set up to the surface of permeating water.
When rainwater flows through the permeable asphalt pavement layer and enters the inside of the road body, the rainwater flows to the drainage groove by utilizing the high-permeability structural layer formed by the first permeable concrete layer, the melon seed layer and the second permeable concrete layer, the rainwater can flow into drainage ditches at two sides of the road at a higher speed along the micro-arch inclined structure of the drainage groove or directly enters the drainage ditches, the high-permeability structural layer is used as a rainwater transition layer, the water accumulation on the pavement can be prevented, the rainwater is prevented from seeping into the impermeable concrete layer of the base layer, the stability of the impermeable concrete layer of the base layer is improved, the problem of road damage caused by the infirm base layer is prevented, and the service life of the road is prolonged; in addition, the melon seed stone layer is inserted into the pervious concrete layer, the melon seed stone layer is beneficial to forming communicated gaps among the pervious concrete layers, the water permeability is improved, and meanwhile, the strength of the pervious layer is improved due to the high strength of the melon seed stone, so that the strength and the durability of a road are enhanced; rivers are through by the impervious concrete layer of basic unit, first pervious concrete layer, melon seed stone layer, the second pervious concrete layer, the high water permeability structural layer that the pitch surface course that permeates water constitutes gets into the escape canal behind, it is purified by purifier to go into the rainwater room of keeping in again and recycles the locker room, this process of flowing keeps in the room at the rainwater, purifier, it sets up a plurality of suction pumps to recycle the locker room, the pipeline that draws water realizes, the water of collecting with the external world is directly handled the back and is recycled, water economy resource and treatment cost.
Preferably, the composition of the impermeable concrete layer of the base layer is (kg/m)3): 300-600 parts of cement, 450-500 parts of sand, 1000-1100 parts of broken stone, 120-170 parts of water, 20-30 parts of polyvinyl alcohol, 2-10 parts of magnesium stearate, 10-20 parts of activated coal gangue powder, 10-20 parts of sodium montmorillonite, 2-10 parts of redispersible rubber powder, 5-8 parts of hydroxyethyl methyl cellulose, 5-15 parts of aluminum silicate fiber and 1-3 parts of a water reducing agent. The water reducing agent is a polycarboxylic acid water reducing agent.
The base impervious concrete layer prepared by the raw materials has the performances of high strength, high water resistance, good toughness and the like, the highest permeation resistance pressure can reach 6.3Mpa, and the compressive strength can reach more than 70 Mpa. The polyvinyl alcohol is a water-soluble high molecular polymer, the spherical polymer particles are respectively filled in the cement particles, the hydration products are gathered around the polymer particles after curing, and the polymer particles are dispersed in the concrete to play a toughening effect, so that the crack resistance of the concrete is improved. The activated coal gangue has certain volcanic ash activity and is hydrated with cement clinker to obtain Ca (OH)2The secondary reaction is carried out to form hydration products such as ettringite, hydrated calcium silicate, hydrated calcium aluminate and the like, and the hydration reaction of the coal gangue reduces Ca (OH) in the hydration products2Content of (3) and inhibition of Ca (OH)2The growth and aggregation of the crystal can improve the concrete structure and the durability, and the activated coal gangue powder has better filling property and self-compaction property. The redispersible latex powder is used for water retention to prevent the concrete from being hardened, dried and cracked too fast, and is SWF-05. The hydroxyethyl methyl cellulose is beneficial to improving the uniformity of concrete, controlling the air infiltration and avoiding the formation of cracks after the concrete is cured. The aluminum silicate fiber has the advantages of good elasticity, high tensile strength, long service life, good thermal stability and the like, and the addition of the aluminum silicate fiber into the concrete can improve the fire resistance, pressure resistance and heat resistance of the concrete and prevent the cracking of the concrete.
The activated coal gangue powder, the sodium-based montmorillonite, the redispersible rubber powder, the hydroxyethyl methyl cellulose and the aluminum silicate fiber are added into the concrete, and the components have synergistic effect, so that the impervious concrete layer of the base layer has good compactness, better crack resistance and shock resistance than a common concrete structure, good waterproof and seepage-proof performance, good corrosion resistance, aging resistance, workability, plasticity and pumpability, and long service life.
Preferably, the preparation method of the activated coal gangue powder comprises the steps of ① crushing, crushing coal gangue into particles with the particle size of 10-15 mm, ② preprocessing, calcining the crushed coal gangue at 300-500 ℃ for 2-5 h, ③ ball milling, ball milling the preprocessed coal gangue to the particle size of less than 0.08mm to obtain the coal gangue powder, ④ calcining, calcining the coal gangue powder at 600 ℃ for 2h, heating 0.5h to 900 ℃, preserving heat for 2h, and cooling to room temperature within 0.5h to obtain the activated coal gangue powder.
Preferably, the first/second pervious concrete layer has a composition of (kg/m)3): 40-190 parts of sludge dry powder, 1250-1350 parts of broken stone, 200-350 parts of cement, 100-150 parts of water, 60-100 parts of slag, 2-10 parts of hydroxypropyl methyl cellulose, 3-15 parts of aluminum hydrogen phosphate, 0.1-1 part of triethanolamine, 3-15 parts of amphiphilic polyurethane, 5-8 parts of hydroxymethylated alkali lignin, 2-10 parts of amino triethanol and 2-10 parts of polyethylene glycol.
According to the structural performance of the pervious concrete, in the pervious concrete, a part of cementing materials play a role in binding aggregates in the forming process of the pervious concrete; the other part of the cementing material exists among the aggregates, and has certain strength after the curing is finished, and the strength of the part of the cementing material directly influences the strength and the service life of the pervious concrete. According to the invention, the amphiphilic polyurethane with amphiphilicity, the hydroxymethylated alkali lignin additive, the slag, the hydroxypropyl methylcellulose, the aluminum dihydrogen phosphate, the triethanolamine, the amphiphilic polyurethane, the hydroxymethylated alkali lignin, the amino triethanolamine and the polyethylene glycol are selected, so that the aggregate is uniformly wrapped in the hydrophilic middle part by the cementing material, and the hydrophobic outer part of the cementing material has good hydrophobic property, thereby being beneficial to the rapid transmission and release of rainwater in the pervious concrete and preventing water accumulation on roads; the cementitious material among the aggregates has a spatial framework network structure, the strength of the cementitious material is obviously higher than that of a common cementitious material, the 28d compressive strength of the pervious concrete prepared from the ingredients reaches more than 35.0Mpa, the permeability coefficient reaches 3.5-5.5 mm/s, and the flexural strength is higher than 4.5 Mpa.
Specifically, the method comprises the following steps: the sludge dry powder is adopted to partially replace cement, and the micro morphology of the irregular, rough and porous sludge and the potential pozzolanic activity are utilized, so that the pervious concrete can show excellent compressive strength, excellent water permeability coefficient and good adsorption performance. The hydrophilic group on the molecular structure of the hydroxypropyl methyl cellulose is combined with water molecules, so that free water is changed into combined water to play a role in water retention, the hydroxypropyl methyl cellulose contains surface active substances, a plurality of micro bubbles can be generated during mixing and stirring, the bubbles are retained in concrete to form pores, and the water permeability of the concrete is improved. Aluminum ions in the aluminum dihydrogen phosphate can form a complex network structure with calcium ions and methyl silicate ions in the concrete, so that the integral crack resistance, the fracture resistance and the like of the concrete are improved. Hydroxymethylation alkali lignin is a long molecular chain material with amphiphilic property, the content of hydrophilic groups of alcoholic hydroxyl and phenolic hydroxyl is more than 50 percent of that of common lignin, the alcoholic hydroxyl and the phenolic hydroxyl are combined with calcium ions in hydration products by ionic bonds to form a complex without forming precipitates, the hydration products are combined with other raw materials to form a composite structure, and the toughness and the pressure resistance of the pervious concrete are improved after curing. The amino triethanol improves the alkali resistance, alkali reversion resistance, salting-out resistance and aging resistance, and avoids the differentiation phenomenon caused by long-time wind, rain and sunshine. The polyethylene glycol side chain hydroxyl group can improve the fluidity and the dispersibility of concrete slurry, meanwhile, oxygen atoms in the polyethylene glycol side chain can be combined with free water in a concrete cementing material, free water contained in gel is released in the diffusion process of concrete particles to promote hydration reaction, and the polyethylene glycol side chain hydroxyl group is combined with the long-chain branch chain polyethylene glycol group, so that the obvious retardation effect is achieved, the workability of concrete is improved, and the problems of cracks, breakage and the like after the pervious concrete is condensed are avoided; meanwhile, the polyethylene glycol and other raw materials interact through covalent bonds, hydrogen bonds, Van der Waals force and the like, so that the stability of the permeable concrete structure can be improved, and the strength of the concrete can be improved.
Preferably, the preparation method of the sludge dry powder comprises the following steps: calcining the sludge at 200-500 ℃ for 1-4 h, ball-milling to below 1mm, uniformly mixing 5mol/L phosphoric acid solution and the sludge, drying at 150 ℃ and grinding to 25-30 um.
Preferably, the melon seed stone layer consists of (kg/m)3): 350-450 parts of cement, 25-40 parts of epoxy resin, 10-35 parts of emulsified asphalt, 4-16 parts of curing agent, 1200-1800 parts of melon seed stone, 130-160 parts of water, 7-15 parts of methyl cellulose and 1.5-3 parts of triethanolamine. The curing agent may be of the type conventionally used in the art, and may be, for example, organic acids, modified fatty amines and boron trifluoride and complexes thereof, and the like, and in the present invention, in order to allow the epoxy resin to form a better network structure, in a preferred embodiment of the present invention, the curing agent is diethylenetriamine. The epoxy group in the epoxy resin and the amino group in the curing agent and substances such as polycyclic mixed aromatic hydrocarbon in the emulsified asphalt are subjected to complex crosslinking curing reaction to form a space network interpenetrating system, so that the cohesiveness, the strength and the toughness of the concrete can be improved. The 28d compressive strength of the melon seed stone layer is 45-65 Mpa, the breaking strength is not less than 5Mpa, and the water permeability coefficient is 5.5-9 mm/s. Preferably, the particle size of the melon seed stone is 5-10mm, and the apparent density is 2700kg/m3。
Preferably, the permeable asphalt component of the permeable asphalt pavement layer is (kg/m)3): 18-22 parts of asphalt, 280-425 parts of cement, 1400-1600 parts of macadam, 20-50 parts of sand, 2-10 parts of redispersible latex powder, 5-8 parts of polypropylene fiber, 2-3 parts of basalt fiber, 0.3-5 parts of polyvinyl alcohol, 3-5 parts of polyethylene glycol, 5-8 parts of fatty acid ester and 120-150 parts of water. The asphalt, the polyvinyl alcohol, the polyethylene glycol and the fatty acid ester in the permeable asphalt pavement layer have good compatibility, a stable space network structure is continuously formed through a curing reaction and a crosslinking action, a polyvinyl alcohol condensate is adsorbed on the surface of the asphalt and mutually staggered with the asphalt to form a physical bond, the polyvinyl alcohol and the asphalt also have chemical crosslinking, the asphalt, the redispersible latex powder, the polyvinyl alcohol, the polyethylene glycol and the fatty acid ester are connected together to form a three-dimensional network structure along with the reaction, and the asphalt colloid structure is more stable. The 28d compressive strength of the pervious concrete is 50-60 Mpa, and the pervious concrete is resistant toThe breaking strength is not less than 5Mpa, and the water permeability coefficient is 2.3-3.2 mm/s.
A construction method of a sponge city ecological treatment road system comprises the following steps:
step one, setting a base layer impermeable concrete layer, cleaning and leveling a plain soil layer, then measuring and setting out, pouring the base layer impermeable concrete layer on the plain soil layer, reserving drainage ditches at two sides of the base layer impermeable concrete layer, spraying water for curing for at least 14 days, and covering with a plastic film, wherein the thickness of the base layer impermeable concrete layer is not less than 9cm, the transverse gradient is 3-5 degrees; when the strength of the impermeable concrete layer of the base layer reaches 30% of the design strength, cutting to form drainage grooves, wherein the distance between the drainage grooves is 3-6 mm, the width is 3-8 mm, and the depth is 2-5 mm; paving a steel bar mesh on an impermeable concrete layer of a base layer, and paving a mesh cloth above the steel bar mesh;
step two, paving a first pervious concrete layer, weighing the raw materials according to the content of the planned raw materials, mixing aggregate with 50% of water, adding a cement admixture, stirring for 30s, adding the rest water and the admixture, stirring for 60s, paving the mixture on the impervious concrete layer of the base layer to form the first pervious concrete layer, paving the first pervious concrete layer with the thickness of 15-25 cm and the porosity of 17.8-25.9%, and immediately and uniformly spreading a melon seed layer on the first pervious concrete layer with the thickness of 2-6 cm and the porosity of 29-40%;
paving a second pervious concrete layer, wherein the thickness of the second pervious concrete layer is 10-20 cm, the porosity is 18.5-28.8%, and the second pervious concrete layer is firmly adhered and embedded with the raised melon seeds in the first pervious concrete layer;
paving a permeable asphalt pavement layer before the initial setting of the second permeable concrete layer, wherein the thickness of the permeable asphalt pavement layer is 4-8 cm, and the porosity is 14.5-16.9%;
step five, flattening and maintaining;
step six, arranging a rainwater temporary storage chamber at every 50m of the road section; the rainwater temporary storage chamber is connected with the recycling storage chamber through a water purification device through a drainage pipeline.
Compared with the prior art, the invention has the advantages that: (1) the cement pervious concrete ground of the pervious asphalt effectively solves the problem of inconvenient repair after the damage of the road surface caused by low use frequency and low strength of municipal roads. (2) The combination of the pervious concrete ground and the impervious concrete layer of the base layer effectively solves the self limitation of the original ground, improves the porosity and the water permeability of the pervious concrete, ensures the strength and the wear resistance of the concrete, can be widely used for projects and roads with water permeability requirements, such as urban roads, expressways, garden roads, sidewalks, parking lots, parks and the like, and can also be used for high-load road concrete, such as urban roads, expressways and the like, and has important significance for relieving urban 'heat island phenomenon', relieving urban waterlogging and recovering urban ecological cycle.
Drawings
FIG. 1 is a schematic view of the structure of a sponge urban ecological treatment road of the invention;
FIG. 2 is a schematic view of the rainwater flow direction of the sponge urban ecological treatment road system.
1. A base impervious concrete layer; 2. a first pervious concrete layer; 3. a melon seed stone layer; 4. a second pervious concrete layer; 5. and (5) a permeable asphalt pavement layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
A sponge urban ecological treatment road system sequentially comprises a base layer impermeable concrete layer 1, a first permeable concrete layer 2, a melon seed layer 3, a second permeable concrete layer 4 and a permeable asphalt pavement layer 5 from bottom to top, wherein a reinforcing mesh is arranged between the base layer impermeable concrete layer 1 and the first permeable concrete layer 2, mesh cloth is arranged above the reinforcing mesh, drainage ditches are arranged on two sides of the surface of the base layer impermeable concrete layer 1, a plurality of parallel micro-arch drainage grooves communicated with the drainage ditches are formed in the middle of the surface of the base layer impermeable concrete layer, the drainage ditches are communicated with a rainwater temporary storage chamber, the rainwater temporary storage chamber is communicated with a water purifying device, and rainwater enters a recycling storage chamber after being purified by the water purifying device; the drainage ditch cross-section is U type structure, and the drainage ditch bottom flushes with basic unit impervious concrete layer upper surface, and the drainage ditch is different with ordinary road drainage ditch to lean on one side of road to set up to the surface of permeating water. The water permeable surface can be formed by a high water permeability structural layer or can be designed into a steel bar net structure (not shown in the figure).
The raw materials of each layer structure of the road system are introduced as follows: the cement grade is above 42.5 grade, the Portland cement with high strength and less mixed material is used, and the optimal cement slurry amount is uniform cement slurry film of about 0.5-1.0mm formed on the surface of the deposited material.
The crushed stone adopts the following technical performance indexes:
physical properties and chemical composition of the slag:
the components of the base impermeable concrete layer 1 comprise activated coal gangue powder, and the activated coal gangue powder is prepared in a unified mode through ① crushing, namely crushing coal gangue into particles with the particle size of 10-15 mm, ② pretreatment, namely calcining the crushed coal gangue for 3 hours at the temperature of 450 ℃, ③ ball milling, namely ball milling the pretreated coal gangue until the particle size is smaller than 0.08mm to obtain coal gangue powder, ④ calcining, namely calcining the coal gangue powder at the temperature of 600 ℃ for 2 hours, heating the coal gangue powder to the temperature of 900 ℃ for 0.5 hour, preserving the heat for 2 hours, and cooling the coal gangue powder to the room temperature for 0.5 hour to obtain the activated coal gangue powder.
The mixing ratio (kg/m) of the impermeable concrete layer 1 of the base layer3)：
A1-4 are the waterproof concrete layer 1 of the base layer of the invention, and D1-3 are comparative experiment examples.
The mechanical property test is carried out on the impermeable concrete layer 1 of the base layer with the mixture ratio, and the test result is as follows:
from the data in the table above, it can be seen that the contents of the activated gangue powder, the sodium-based montmorillonite, the redispersible rubber powder, the hydroxyethyl methyl cellulose and the aluminum silicate fiber affect the compressive strength and the permeation resistance of the impermeable concrete layer 1 of the base layer, and the impermeable concrete layer 1 of the base layer disclosed by the invention has more excellent strength and permeation resistance.
The first/second pervious concrete layer 2/4 has a composition of (kg/m)3): 40-190 parts of sludge dry powder, 1250-1350 parts of broken stone, 200-350 parts of cement, 100-150 parts of water, 60-100 parts of slag, 2-10 parts of hydroxypropyl methyl cellulose, 3-15 parts of aluminum hydrogen phosphate, 0.1-1 part of triethanolamine, 3-15 parts of amphiphilic polyurethane, 5-8 parts of hydroxymethylated alkali lignin, 2-10 parts of amino triethanol and 2-10 parts of polyethylene glycol. The preparation method of the sludge dry powder comprises the following steps: calcining the sludge at 300 ℃ for 3h, ball-milling to below 1mm, uniformly mixing 5mol/L phosphoric acid solution and the sludge, drying at 150 ℃ and grinding to 25-30 um. The amphiphilic polyurethane consists of polybutadiene: polyethylene glycol: the toluene diisocyanate is prepared according to the ratio of 1:8: 0.5. The synthetic method of hydroxymethylated alkali lignin is a conventional synthetic method and comprises the following specific steps: dissolving lignin with 0.2mol/L NaOH solution, adjusting pH to 11, adding 1% formaldehyde solution by volume, heating to 80 ℃, reacting for 120 minutes, adjusting pH to 3.5 with acid, keeping the temperature at 60 ℃ for 60 minutes, performing hot filtration, washing with water to be neutral, drying in a vacuum drying oven at 45 ℃ for 24 hours, and grinding the solid into powder to obtain hydroxymethylated alkali lignin.
The mixing ratio (kg/m) of the first/second pervious concrete layers 2/43)：
B1-4 are the first/second pervious concrete layer 2/4 of the invention, and D4-7 are comparative experiment examples.
The mechanical property and the water permeability of the first/second pervious concrete layer 2/4 with the mixing ratio are tested, and the test results are as follows:
the data in the table show that the contents of the sludge dry powder and the amphiphilic polyurethane influence the mechanical property and the water permeability coefficient of the pervious concrete, and the hydroxymethylated alkali lignin has structural characteristics superior to that of common lignin, the B2 has performance superior to that of D6 and D7, and the raw materials are synergistic with each other, so that the pervious concrete disclosed by the invention has more excellent overall performance.
The composition of the melon seed layer 3 of the marine sponge urban ecological treatment road system in the embodiment is (kg/m)3): 400 parts of cement, 30 parts of epoxy resin, 30 parts of emulsified asphalt, 10 parts of curing agent, 1600 parts of melon seeds, 130 parts of water, 10 parts of methyl cellulose and 2 parts of triethanolamine. At the moment, the compressive strength of the melon seed stone layer 3 is 60Mpa, and the water permeability coefficient is 6.5 mm/s.
The composition of the pervious asphalt pavement layer 5 is (kg/m)3): 20 parts of asphalt, 350 parts of cement, 1500 parts of crushed stone, 30 parts of sand, 7 parts of re-dispersible latex powder, 6 parts of polypropylene fiber, 2 parts of basalt fiber, 3 parts of polyvinyl alcohol, 4 parts of polyethylene glycol, 6 parts of fatty acid ester and 150 parts of water. At the moment, the compressive strength of the permeable asphalt pavement layer 5 is 55Mpa, and the permeability coefficient is 3.0 mm/s.
Application example 1
The sponge city ecological treatment road system is manufactured by selecting A2 as a base impervious concrete layer 1, B2 as a first pervious concrete layer 2 and B1 as a second pervious concrete layer 4, and selecting the melon seed stone layer 3 and the pervious asphalt pavement layer 5, and specifically comprises the following steps:
step one, setting a base layer impermeable concrete layer 1, cleaning and leveling a plain soil layer, then measuring and setting out, pouring the base layer impermeable concrete layer 1 on the plain soil layer, reserving drainage ditches at two sides of the base layer impermeable concrete layer 1, carrying out watering maintenance for at least 14 days with the thickness of the base layer impermeable concrete layer 1 being 15cm and the transverse gradient being 3 degrees, and covering with a plastic film; when the strength of the impermeable concrete layer 1 of the base layer reaches 30% of the design strength, cutting to form drainage grooves, wherein the distance between the drainage grooves is 5mm, the width is 5mm, and the depth is 3 mm; paving a steel bar mesh on the impermeable concrete layer 1 of the base layer, and paving a mesh cloth above the steel bar mesh;
and secondly, paving a first pervious concrete layer 2, weighing the raw materials according to the content of the planned raw materials, mixing the aggregate with 50% of water, adding the cement admixture, stirring for 30s, adding the rest water and the admixture, stirring for 60s, paving the mixture on the impervious concrete layer 1 of the base layer to form the first pervious concrete layer 2, paving the first pervious concrete layer with the thickness of 20cm, and immediately and uniformly spreading a melon seed layer 3 on the first pervious concrete layer with the thickness of 5 cm.
Paving a second pervious concrete layer 4, wherein the thickness of the second pervious concrete layer 4 is 18cm, and the second pervious concrete layer 4 is firmly bonded and embedded with the raised melon seeds in the first pervious concrete layer 2;
fourthly, paving a permeable asphalt pavement layer 5 with the thickness of 6cm before the initial setting of the second permeable concrete layer 4;
step five, flattening and maintaining;
step six, arranging a rainwater temporary storage chamber at every 50m of the road section; the rainwater temporary storage chamber is connected with the recycling storage chamber through a water purification device through a drainage pipeline.
When a large amount of ponding appear in the road surface rainwater, utilize high water permeability structural layer and basic unit concrete layer's horizontal slope and water drainage tank, rivers get into the escape canal and discharge and get into the locker room of recycling, in this application example, road structure adopts the mode of permeating water that reduces after rising earlier, has got good water permeability and has permeated water the hole and be difficult for blockking up, has prolonged road structure's nursing cycle, alleviates the maintenance burden.
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. A sponge urban ecological treatment road system sequentially comprises a base layer impermeable concrete layer, a first permeable concrete layer, a melon seed layer, a second permeable concrete layer and a permeable asphalt pavement layer from bottom to top, wherein a reinforcing mesh is arranged between the base layer impermeable concrete layer and the first permeable concrete layer, a mesh cloth is arranged above the reinforcing mesh, drainage ditches are arranged on two sides of the surface of the base layer impermeable concrete layer, a plurality of mutually parallel micro-arch drainage grooves communicated with the drainage ditches are formed in the middle of the surface of the base layer impermeable concrete layer, the drainage ditches are communicated with a rainwater temporary storage chamber, the rainwater temporary storage chamber is communicated with a water purifying device, and rainwater enters a recycling storage chamber after being purified by the water purifying device; the drainage ditch is of a U-shaped structure, the bottom of the drainage ditch is flush with the upper surface of the impermeable concrete layer of the base layer, and the drainage ditch is different from a common road drainage ditch in that one side of a road is set as a permeable surface; the composition of the first/second pervious concrete layer is (kg/m 3): 40-190 parts of sludge dry powder, 1250-1350 parts of broken stone, 200-350 parts of cement, 100-150 parts of water, 60-100 parts of slag, 2-10 parts of hydroxypropyl methyl cellulose, 3-15 parts of aluminum hydrogen phosphate, 0.1-1 part of triethanolamine, 3-15 parts of amphiphilic polyurethane, 5-8 parts of hydroxymethylated alkali lignin, 2-10 parts of amino triethanol and 2-10 parts of polyethylene glycol.
2. The sponge urban ecological treatment road system according to claim 1, characterized in that: the composition of the impermeable concrete layer of the base layer is (kg/m 3): 300-600 parts of cement, 450-800 parts of sand, 1000-1100 parts of broken stone, 120-170 parts of water, 20-30 parts of polyvinyl alcohol, 2-10 parts of magnesium stearate, 10-20 parts of activated coal gangue powder, 10-20 parts of sodium montmorillonite, 2-10 parts of redispersible rubber powder, 5-8 parts of hydroxyethyl methyl cellulose, 5-15 parts of aluminum silicate fiber and 1-3 parts of a water reducing agent.
3. The sponge urban ecological treatment road system according to claim 2, wherein the preparation method of the activated coal gangue powder comprises the steps of ① crushing, crushing coal gangue into particles with the particle size of 10-15 mm, ② preprocessing, calcining the crushed coal gangue for 2-5 h at 300-500 ℃, ③ ball milling, ball milling the preprocessed coal gangue to the particle size of less than 0.08mm to obtain coal gangue powder, ④ calcining, calcining the coal gangue powder at 600 ℃ for 2h, heating the coal gangue powder to 900 ℃ for 0.5h, preserving the heat for 2h, and cooling the coal gangue powder to room temperature for 0.5h to obtain the activated coal gangue powder.
4. The sponge urban ecological treatment road system according to claim 1, characterized in that: the preparation method of the sludge dry powder comprises the following steps: calcining the sludge at 200-500 ℃ for 1-4 h, ball-milling to below 1mm, uniformly mixing 5mol/L phosphoric acid solution and the sludge, drying at 150 ℃ and grinding to 25-30 um.
5. The sponge urban ecological treatment road system according to claim 1, characterized in that: the component of the melon seed stone layer is (kg/m 3): 350-450 parts of cement, 25-40 parts of epoxy resin, 10-35 parts of emulsified asphalt, 4-16 parts of curing agent, 1200-1800 parts of melon seed stone, 130-160 parts of water, 7-15 parts of methyl cellulose and 1.5-3 parts of triethanolamine.
6. The sponge urban ecological treatment road system according to claim 1, characterized in that: the components of the pervious asphalt pavement layer are as follows (kg/m 3): 18-22 parts of asphalt, 280-425 parts of cement, 1400-1600 parts of macadam, 20-50 parts of sand, 2-10 parts of redispersible latex powder, 5-8 parts of polypropylene fiber, 2-3 parts of basalt fiber, 0.3-5 parts of polyvinyl alcohol, 3-5 parts of polyethylene glycol, 5-8 parts of fatty acid ester and 120-150 parts of water.
7. The sponge urban ecological treatment road system according to claim 1, characterized in that: the particle size of the melon seed stone is 5-10mm, and the apparent density is 2700kg/m 3.
8. The construction method of the ecological treatment road system for the sponge city as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
step one, setting a base layer impermeable concrete layer, cleaning and leveling a plain soil layer, then measuring and setting out, pouring the base layer impermeable concrete layer on the plain soil layer, reserving drainage ditches at two sides of the base layer impermeable concrete layer, spraying water for curing for at least 14 days, and covering with a plastic film, wherein the thickness of the base layer impermeable concrete layer is not less than 9cm, the transverse gradient is 3-5 degrees; when the strength of the impermeable concrete layer of the base layer reaches 30% of the design strength, cutting to form drainage grooves, wherein the distance between the drainage grooves is 3-6 mm, the width is 3-8 mm, and the depth is 2-5 mm; paving a steel bar mesh on an impermeable concrete layer of a base layer, and paving a mesh cloth above the steel bar mesh;
step two, paving a first pervious concrete layer, weighing the raw materials according to the content of the planned raw materials, mixing aggregate with 50% of water, adding a cement admixture, stirring for 30s, adding the rest water and the admixture, stirring for 60s, paving the mixture on the impervious concrete layer of the base layer to form the first pervious concrete layer, paving the first pervious concrete layer with the thickness of 15-25 cm and the porosity of 17.8-25.9%, and immediately and uniformly spreading a melon seed layer on the first pervious concrete layer with the thickness of 2-6 cm and the porosity of 29-40%;
paving a second pervious concrete layer, wherein the thickness of the second pervious concrete layer is 10-20 cm, the porosity is 18.5-28.8%, and the second pervious concrete layer is firmly adhered and embedded with the raised melon seeds in the first pervious concrete layer;
paving a permeable asphalt pavement layer before the initial setting of the second permeable concrete layer, wherein the thickness of the permeable asphalt pavement layer is 4-8 cm, and the porosity is 14.5-16.9%;
step five, flattening and maintaining;
step six, arranging a rainwater temporary storage chamber at every 50m of the road section; the rainwater temporary storage chamber is connected with the recycling storage chamber through a water purification device through a drainage pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910470909.6A CN110184877B (en) | 2019-05-31 | 2019-05-31 | Sponge urban ecological treatment road system and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910470909.6A CN110184877B (en) | 2019-05-31 | 2019-05-31 | Sponge urban ecological treatment road system and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110184877A CN110184877A (en) | 2019-08-30 |
| CN110184877B true CN110184877B (en) | 2020-06-16 |
Family
ID=67719462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910470909.6A Expired - Fee Related CN110184877B (en) | 2019-05-31 | 2019-05-31 | Sponge urban ecological treatment road system and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110184877B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761142A (en) * | 2019-10-21 | 2020-02-07 | 江西亘森生态材料有限公司 | Asphalt pavement permeable flow guide path flat stone and flow guide path structure |
| CN115030770A (en) * | 2021-04-15 | 2022-09-09 | 重庆工程职业技术学院 | Ventilation method in gas extraction operation in mine |
| TWI784866B (en) * | 2022-01-13 | 2022-11-21 | 國立臺灣科技大學 | Porous pavement and method for manufacturing the same |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556906A (en) * | 2014-12-31 | 2015-04-29 | 孙政 | Worn ultrathin road surface material and preparation method thereof |
| CN105084838B (en) * | 2015-08-24 | 2017-04-12 | 安平 | Pervious concrete for highway engineering |
| CN105198316A (en) * | 2015-09-17 | 2015-12-30 | 同济大学 | Emulsified asphalt cement stabilized macadam |
| KR20170143279A (en) * | 2016-06-21 | 2017-12-29 | 한국교통대학교산학협력단 | Water permeable block assembly, water permeable system having this and construction method thereof |
| CN106192666A (en) * | 2016-07-21 | 2016-12-07 | 上海豫景科技有限公司 | A kind of permeable mortar and utilize the porous pavement that permeable mortar makes |
| CN106917336B (en) * | 2017-03-09 | 2019-08-23 | 浙江德林建设有限公司 | A kind of pavement structure |
| CN207176423U (en) * | 2017-11-30 | 2018-04-03 | 吉林桐源生态环境技术工程有限公司 | A kind of garden landscape paving structure |
| CN109235175A (en) * | 2018-10-31 | 2019-01-18 | 贵州理工学院 | A kind of pavement structure of urban road |
| CN109650800A (en) * | 2019-02-12 | 2019-04-19 | 青岛光大集团大型构件有限公司 | A kind of lining segment concrete and preparation method thereof |
-
2019
- 2019-05-31 CN CN201910470909.6A patent/CN110184877B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN110184877A (en) | 2019-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5404401B2 (en) | Composite permeable brick and mixed material for manufacturing surface layer of composite permeable brick | |
| CN103360000B (en) | Pervious concrete and preparation method thereof | |
| CN110184877B (en) | Sponge urban ecological treatment road system and construction method thereof | |
| CN104018409B (en) | A kind of mixed type pervious concrete pavement structure of sustainability | |
| CN104402339A (en) | Pervious concrete and construction method thereof | |
| CN108821678B (en) | Permeable cement concrete and preparation method thereof | |
| CN110041005B (en) | Reinforcing agent for pervious concrete and preparation method and construction process thereof | |
| CN112679190B (en) | Reinforcing waterproof mortar for filling concrete bottom cavity | |
| CN107034767A (en) | A kind of full pervious concrete pavement structure of regeneration aggregate and its construction method | |
| CN110272245B (en) | High-strength sponge urban pervious concrete and preparation method thereof | |
| CN113248219B (en) | Modified unsaturated polyester resin pervious concrete and preparation method thereof | |
| CN113087436A (en) | Preparation method of pervious concrete admixture | |
| CN201620327U (en) | Anti-block pervious concrete road surface brick | |
| CN112851218B (en) | Preparation method of energy-saving environment-friendly high-strength fast-permeable concrete | |
| CN113501693A (en) | Rapid permeable compression-resistant concrete | |
| CN202492776U (en) | Compound ion soil curing agent and road structure paved by acetylene sludge | |
| CN111877083A (en) | Load-bearing geopolymer base water storage road | |
| CN106800393A (en) | A kind of modified carbon nano-tube strengthens the cement base water-permeable brick of anti-freezing property | |
| CN111041929A (en) | Light-emitting pervious concrete road based on recycled aggregate and construction method thereof | |
| CN206828912U (en) | A kind of full pervious concrete pavement structure of regeneration aggregate | |
| CN107986742B (en) | Water-permeable and water-retaining material and preparation method thereof | |
| CN1626472A (en) | Environmental protection color pavement bricks | |
| CN112125700B (en) | Water purification type pervious concrete capable of removing nitrogen and phosphorus and preparation method thereof | |
| CN110256017B (en) | Environment-friendly shell water permeable brick and preparation method thereof | |
| CN113637247A (en) | Preparation method of ecological tree protection plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200616 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |