CN111809474A - Garden road color asphalt pervious concrete construction method - Google Patents
Garden road color asphalt pervious concrete construction method Download PDFInfo
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- CN111809474A CN111809474A CN202010769880.4A CN202010769880A CN111809474A CN 111809474 A CN111809474 A CN 111809474A CN 202010769880 A CN202010769880 A CN 202010769880A CN 111809474 A CN111809474 A CN 111809474A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
- E01C7/325—Joining different layers, e.g. by adhesive layers; Intermediate layers, e.g. for the escape of water vapour, for spreading stresses
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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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/16—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
- E01C19/17—Application by spraying or throwing
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a garden road color asphalt pervious concrete construction method, relating to the technical field of pavement construction; selecting soil according with the design according to garden road requirements, carrying out layered backfilling and layered compaction on a plain soil roadbed, testing the foundation leveling condition of the roadbed, sampling and testing the roadbed quality by adopting a cutting ring after compaction, wherein the compaction coefficient is more than or equal to 0.93, continuing to pave graded broken stones, firstly constructing a cushion layer, then paving a sand filter layer, then pouring a permeable concrete base layer, firstly pouring bottom permeable concrete, then pouring surface permeable concrete, maintaining the permeable concrete base layer, paving road shoulder stones after construction and maintenance of the permeable concrete base layer, continuing asphalt sealing construction, asphalt bonding layer construction, asphalt surface layer construction and maintenance.
Description
Technical Field
The invention discloses a construction method, relates to the technical field of pavement construction, and particularly relates to a garden road color asphalt pervious concrete construction method.
Background
In the traditional garden road surface construction, a heat island effect is easily generated due to the increase of the surface temperature and humidity in the evaporation process after rain; and when the drainage facility is not completely constructed, waterlogging is easy to occur, and the color and the form of the asphalt concrete pavement are generally single and lack of aesthetic feeling. And the colored asphalt pervious concrete is applied to paving the garden path, so that the problems that when the construction of a drainage facility is incomplete, waterlogging is easy to occur, the color and the form of the garden path are generally single and the aesthetic feeling is lacked are solved, but the construction quality of the asphalt pervious concrete in the existing garden path colored asphalt pervious concrete construction is unstable, the construction speed is low, and the construction and the paving of the whole garden path are very not facilitated.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a construction method of garden road color asphalt pervious concrete, and the specific scheme provided by the invention is as follows:
a method for constructing colored asphalt pervious concrete for garden road includes such steps as choosing the soil according with design, filling the soil in soil, compacting, sampling with cutting ring to obtain compact coefficient greater than 0.93,
continuously paving graded broken stones, firstly constructing a cushion layer and then paving a sand filter layer,
then pouring a pervious concrete base layer, pouring bottom pervious concrete firstly in the pervious concrete base layer pouring, then pouring surface pervious concrete, curing the pervious concrete base layer, paving and pasting the road shoulder stone after the pervious concrete base layer is constructed and cured,
the construction of asphalt seal coat and asphalt adhesive coat is continued,
and constructing and maintaining an asphalt surface layer.
In the method for constructing the garden road color asphalt pervious concrete, the thickness of the crushed stone is controlled when a cushion layer is constructed, an elevation control point is determined at a road shoulder at a certain distance before the construction of the crushed stone, the thickness of the crushed stone is not more than the elevation control point, after the paving of the graded crushed stone is finished, rolling is carried out and the flatness is checked,
laying a sand filter layer on the cushion layer, selecting a coarse sand filter layer for leveling, spraying water in a proper amount and rolling and compacting.
In the garden road color asphalt pervious concrete construction method, the pouring of the pervious concrete at the bottom layer is as follows:
the template is supported and erected, and the template is erected,
adding materials and stirring to prepare pervious concrete, firstly stirring aggregate and stirring water in advance, then adding cement and continuously stirring, finally adding the rest cement and stirring water,
paving and compacting the material in a blocking and bin-separating mode.
In the construction method of the garden road color asphalt pervious concrete, the surface layer pervious concrete and the bottom layer pervious concrete are synchronously poured, and the loose paving coefficient is 1.1-1.15 according to the dry humidity of the pervious concrete.
In the construction method of the garden road color asphalt pervious concrete, after pouring of the surface layer pervious concrete is completed, maintenance of a pervious concrete base layer is performed in a mode of combining film covering and watering, the surface layer pervious concrete is cleaned with clear water after maintenance, and after the surface is thoroughly dried, the sealant is uniformly sprayed on a surface protection working surface.
The construction method of the garden road color asphalt pervious concrete is characterized in that exposed aggregate pervious concrete is adopted as the surface layer pervious concrete, a surface treatment agent is adopted for pretreatment within 30 minutes after paving, washing is carried out after the pretreatment, impurities on the surface of the garden road are removed, the natural color of natural stone is exposed, particles which do not loosen are suitable, and then film covering and maintenance are continued.
According to the garden road color asphalt pervious concrete construction method, the blind pipes are buried at certain intervals when the road shoulder stones are paved, and when the pervious concrete base layer reaches a full-load drainage load, the blind pipes assist in discharging rainwater seeped from the pervious asphalt pavement.
The construction method of the garden road color asphalt pervious concrete comprises the following steps:
adopts the combined operation of an asphalt spreader and an aggregate spreader,
immediately spreading the aggregate by an aggregate spreader after spreading the asphalt,
after the main aggregate is spread, the road is immediately rolled from the roadside to the road center,
when the seal coat oil is spread, the permeable concrete base layer is covered by the film.
The asphalt adhesive layer construction method in the garden road color asphalt pervious concrete construction method comprises the following steps:
the viscous layer oil is sprayed by an asphalt spraying vehicle,
the viscous layer is constructed by selecting dry and hot weather, the sprayed viscous layer oil is even and vaporous and is evenly distributed into a thin layer in the whole width of the road surface,
spreading the viscous layer oil on the same day, paving the asphalt after the emulsified asphalt is demulsified and the water is evaporated,
when the viscous layer oil is spread, the permeable concrete base layer is covered by the film.
The asphalt surface layer construction in the garden road color asphalt pervious concrete construction method comprises the following steps:
the asphalt and the aggregate are mixed, the construction temperature of the asphalt mixture is strictly controlled according to the standard requirement,
paving the asphalt mixture, checking the loose paving thickness and the related temperature at any time,
and respectively carrying out primary pressing, secondary pressing and final pressing on the asphalt mixture.
The invention has the advantages that:
the invention provides a garden road color asphalt pervious concrete construction method, which comprises the steps of carrying out layered backfill and layered compaction on a plain road foundation according to garden road requirements, continuously grading broken stones for paving, pouring a pervious concrete foundation layer, then carrying out surface layer pervious concrete pouring, maintaining the pervious concrete foundation layer, paving road shoulder stones after the pervious concrete foundation layer is constructed and maintained, continuing asphalt sealing construction, asphalt bonding layer construction, and then carrying out asphalt surface layer construction and maintenance; make the colored asphalt concrete that permeates water use the back of paving in garden way, not only improved drainage facility construction, solved the waterlogging problem to garden way color and shape can be diversified, have the aesthetic feeling, guaranteed the construction quality of the colored asphalt concrete that permeates water in garden way in the colored asphalt concrete construction that permeates water in addition, and the construction speed is very fast, very is favorable to the construction of large-scale whole garden way to be laid.
Drawings
FIG. 1 is a schematic flow diagram of the process of the present invention;
figure 2 is a schematic view of a pervious concrete structure;
FIG. 3 is a schematic view of the structure of a pervious asphalt concrete pavement;
FIG. 4 is a photograph of a constructed curbstone at the arc locations on both sides of the road;
FIG. 5 is a photograph showing the color asphalt pavement after construction.
Description of the drawings: 1 is graded broken stone layer, 2 is pervious concrete base course, 3 is the pitch surface course.
Detailed Description
The pervious concrete has a microporous structure, and referring to fig. 2, the pervious concrete is characterized in that single-grain-grade coarse aggregate is adopted as a framework, cement paste or a mortar thin layer added with a small amount of fine aggregate is wrapped on the surfaces of coarse aggregate particles and used as a cementing layer among the aggregate particles to form the framework, namely a porous concrete material with a pore structure, and a honeycomb structure, or a popcorn sugar structure, is formed due to the special aggregate grading. As can be seen from fig. 1, the pervious concrete is a porous aggregate structure formed by bonding coarse aggregate particles through a hardened cement paste thin layer, contains many pores inside, and is mostly large pores with a diameter of more than 1mm, so that the pervious concrete has good water permeability.
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
The invention provides a garden road color asphalt pervious concrete construction method, which comprises the steps of selecting soil according with the design according to garden road requirements, carrying out layered backfilling and layered compaction on a plain soil roadbed, checking the leveling condition of the roadbed foundation, sampling by a cutting ring after compaction to check the roadbed quality, wherein the compaction coefficient is more than or equal to 0.93,
continuously paving graded broken stones, firstly constructing a cushion layer and then paving a sand filter layer,
then pouring a pervious concrete base layer, pouring bottom pervious concrete firstly in the pervious concrete base layer pouring, then pouring surface pervious concrete, curing the pervious concrete base layer, paving and pasting the road shoulder stone after the pervious concrete base layer is constructed and cured,
the construction of asphalt seal coat and asphalt adhesive coat is continued,
and constructing and maintaining an asphalt surface layer.
The method of the invention not only improves the construction of drainage facilities and solves the problem of waterlogging, but also has various colors and shapes of garden roads, has aesthetic feeling, ensures the construction quality of the asphalt permeable concrete in the construction of the garden road color asphalt permeable concrete, has faster construction speed, and is very beneficial to the construction and the laying of large-scale integral garden roads.
In one embodiment of the invention, the specific construction process of the soil roadbed is specifically described as follows:
carrying out layered backfilling and layered compaction on soil according with design requirements, detecting compaction degree not more than 50cm once, strictly checking the elevation of the foundation, checking the leveling condition of the foundation, carrying out rolling compaction or tamping by using a tamping machine, sampling by using a cutting ring after compaction to check the quality of the foundation, and ensuring that the compaction coefficient is more than or equal to 0.93; peripheral terrains and greening conditions are considered during base layer construction, unreasonable design elevation is needed to be communicated in time and properly adjusted, original shrubs are reserved as much as possible, and rainwater can be discharged.
Wherein, the construction of the cushion layer is to lay a graded broken stone or sand-gravel cushion layer according to the design requirement, the graded broken stone is hard, durable and free from impurities, when testing according to JTJ 057-94 standard method, the crushing value of the base layer is not more than 30%, the gravel aggregate should meet the requirement of JTJ034-93, the material loading should use bulldozer, the paving graded gravel should be carried out at one time, in order to strictly control the thickness of the gravel layer, an elevation control point should be determined at the shoulder of the road every 4m or so before the construction of the gravel layer, to ensure that the thickness of the crushed stone does not exceed the designed thickness, after the graded crushed stone is paved, firstly rolling the crushed stone by a road roller, using a road arch bridge plate and a small thread rope to test the road arch and the flatness, locally uneven position, removing high and low cushion, spraying a small amount of water after the height is met, then continuously rolling the crushed stone until the crushed stone is initially stable and has no obvious displacement, generally pressing the crushed stone for 3 to 4 times in the stage,
laying a sand filter layer, laying a medium sand filter layer and a coarse sand filter layer on the cushion layer according to the design thickness requirement, leveling, spraying a proper amount of water, rolling and vibrating by a road roller or a flat vibrator of 10 t-12 t for compaction, and erecting a template according to the requirement. And polystyrene board expansion gaps are reserved.
In another embodiment of the method, the construction process of the pervious concrete base layer is specifically described as follows:
erecting a template: the concrete surface layer side form plate is made of channel steel, the form plate is erected according to the side line position, the two sides of the form plate are nailed by iron peg and tightly abut against the form plate, the space is about 0.5 m, the top line elevation of the form plate is the road surface elevation, the elevation is detected and controlled by a level gauge, the lower gap of the form plate is tightly embedded by wood blocks or mortar, the installed form plate is smooth in joint, the line is straight, the edges and corners are neat, stable and firm,
the mixing of pervious concrete comprises the following steps:
the additive and the pigment are metered by an electronic scale,
the pervious concrete is mixed by adopting a three-time feeding method, and the concrete feeding sequence and the stirring time are as follows: firstly, 100 percent of aggregate and 70 percent of mixing water are stirred for 1min in advance, then 50 percent of cement (if an additive is used, the cement is added completely at the moment) is added, the stirring is continued for 1min, finally, the rest 50 percent of cement and 30 percent of mixing water are added into a stirrer, the stirring is carried out for 2min, the whole stirring process is 4min totally,
the pouring of the bottom layer pervious concrete comprises the following steps:
the pervious concrete belongs to a dry concrete material, the initial setting is fast, and the transportation time of the mixture is controlled not to exceed 10 minutes according to the climate conditions. The transportation process does not need to stay, the transportation machine must be stable in the advancing process,
for the large-area construction of a garden road surface, paving materials in a block compartment mode with a loose paving coefficient of 1.1, uniformly paving the mixture on a working surface, finding the flatness and controlling a certain flashing degree by using a leveling ruler, then compacting by using a flat vibrator and a roller, wherein the pressure applied by the roller is controlled between 0.6 and 0.8MPa, the vibration forming time of the flat vibrator is controlled between 20 and 30s,
the parts of the individual parts, such as the parts near the ancient well lid and the like, which are difficult to be compacted and leveled by a roller, are beaten by a wooden trowel, water is strictly forbidden during leveling,
the surface course permeable concrete pouring shaping includes:
the surface layer and the base layer are poured synchronously, the interval time is not more than 2 hours, and the base layer concrete is coated with a film to retain water in the interval time,
the surface concrete is compacted by a flat vibrator and a roller, the method is like a base layer forming mode, the part with larger pores is compacted by manual leveling,
after the first pouring is finished, the color of the concrete is compared with that of the sample block, the construction is continued after the concrete is qualified,
surface exposed aggregate pretreatment: when the surface layer is the exposed aggregate pervious concrete, the surface treatment agent is adopted for pretreatment within 30 minutes after paving, film covering and maintenance are carried out immediately, after the pretreatment is carried out for 10 to 20 hours (determined according to factors such as maintenance temperature, humidity and the like), after the cementing material is inspected to be finally solidified, the film is removed, a high-pressure water gun is used for flushing (the water pressure of the water gun is reasonably controlled), the retarded cementing material on the road surface is removed, the natural color of the natural stone is exposed, the particles which are not loosened are suitable for use, after flushing, the surface is rinsed by water, the residual slurry on the surface and in pores is removed, the exposed aggregate effect is realized, then film covering and maintenance are carried out continuously,
paving and pouring forming cautions: (1) the loose paving coefficient is the ratio of the material paving height higher than the actual height, generally 1.1-1.15 is adopted according to the dry humidity of the pervious concrete, (2) the vibration time of the flat vibrator cannot be overlong, so that the excessive compaction is prevented, and the segregation phenomenon can occur, (3) the paving is as fast and correct as possible, (4) the void ratio of the pervious concrete is large, the water loss is fast, and when the air temperature is higher than 35 ℃, the construction time should be avoided at noon, so that the construction method is suitable for construction in the morning and evening.
In addition to the above embodiments, the coating and curing of the pervious concrete includes:
after the concrete of the surface layer is paved, a curing method of combining film covering and watering is adopted, the film covering is carried out 30min after the concrete is formed, the curing time is preferably 7d,
cleaning and sealing, and carrying out sealing treatment on the colored pervious concrete. And (3) curing the surface concrete for 7 days, cleaning the surface concrete with clear water, uniformly spraying the dipropylene polyurethane sealant on the surface after the surface is completely dried, protecting the working surface, and standing for 8 hours (the time can be properly adjusted according to the field air temperature, ventilation conditions and the like). For exposed aggregate permeable concrete, spraying and sealing can be omitted when no requirement is designed.
On the basis of the above embodiment, another embodiment of the method of the present invention specifically describes a road edge stone construction process:
the method is characterized in that the natural surface of 600 × 200 × 60 dark gray limestone can be used for edge folding on two sides of a road, shoulder stone paving can be carried out after construction and maintenance of base pervious concrete for 7d, in order to ensure timely drainage of rainwater on an asphalt pavement, a phi 50 blind pipe is embedded every 4m when the shoulder stone paving is carried out, when the pervious concrete reaches full-load drainage load, the blind pipe can assist in draining rainwater seeped from the pervious asphalt pavement, the width of the asphalt pavement is ensured when stones are paved, mortar is adopted for repairing individual width places, when radian is large, massive stones are paved, and then arc lines are cut and smoothened by a cutting machine. Paving and pasting of the road shoulder stones are the key for controlling the linearity and the perception quality of the whole road.
In another embodiment of the method of the present invention, a process of laying asphalt is specifically described, wherein before the construction of the asphalt surface layer, the cleaning of the base layer is done, and the construction of the asphalt sealing layer and the bonding layer is done according to the design requirements of the drawing.
And (3) asphalt seal construction:
and (3) finishing the base course curing period, and after the base course curing period is qualified, constructing the asphalt seal layer by adopting a single-layer asphalt surface treatment method, constructing the asphalt seal layer according to the specification requirement, preferably selecting to construct in dry and hotter seasons, finishing the construction in a period of reaching the maximum temperature of less than 15 ℃ for a half month and before rainy season, and requiring the seal layer to be completely water-tight.
Wherein the asphalt seal coat is constructed by adopting the combined operation of an asphalt spreader and an aggregate spreader,
the aggregate spreader should be used to spread the aggregate immediately after the asphalt is spread,
after the main aggregate is spread, the whole spreading is not required to be finished, a 6-8t steel cylinder double-wheel road roller is used for rolling for 3-4 times from the roadside to the road center, and the wheel tracks are overlapped by about 1/3 wheel widths each time. The rolling speed does not exceed 2km/h at first, can be increased properly later,
when the seal coat oil is spread, the 2m colored pervious concrete is completely covered by the film.
And (3) asphalt bonding layer construction:
the adhesive layer oil is high-quality emulsified asphalt, the using amount of the adhesive layer oil is determined by trial spraying according to the design requirements of drawings, the adhesive layer is constructed in dry and hot weather, and the adhesive layer construction cannot be carried out under the condition that the air temperature is lower than 10 ℃ or strong wind or when rainfall is about to occur.
When in construction, the viscous layer oil is sprayed by an asphalt spraying vehicle, a proper nozzle is selected, the spraying speed and the spraying amount are kept stable, when a manual asphalt spraying machine which is motorized or hand-operated is adopted for spraying, skilled technicians are required to operate the device to uniformly spray the viscous layer oil, the viscous layer oil cannot be sprayed when the road surface is wet, the viscous layer oil is sprayed after the surface is dried after being washed by water,
the sprayed oil must be in uniform mist shape, and uniformly distributed into a thin layer in the whole width of the road surface, so that spraying leakage or strip shape can not be formed, accumulation can not be formed, spraying is supplemented when the spraying is insufficient, and the spraying excess part is scraped. Manual painting is adopted in local positions such as kerbs, rainwater inlets, inspection wells and the like, after viscous layer oil is sprayed, other vehicles and pedestrians outside the material transportation vehicle are strictly prohibited from passing through,
the viscous layer oil is sprayed on the same day, after the emulsified asphalt is demulsified and the water is evaporated, the asphalt layer is laid next to ensure that the viscous layer is not polluted,
when the adhesive layer oil is spread, the 2m colored pervious concrete is completely covered by the film.
On the basis of the embodiment, asphalt surface course construction comprises the following steps:
and (4) inspecting and cleaning the adhesive layer, and cleaning sundries on the surface of the adhesive layer. The dust should be blown clean in advance. Before the upper surface layer is paved, the slipform and the inner side of the curb are coated with emulsified asphalt to ensure the bonding of asphalt concrete and cement concrete,
mixing, calibrating each metering system before trial mixing by adopting an ACP-4000 type mixing plant, carrying out flow test in time after the target mixing ratio is determined, repeatedly adjusting the feeding proportion of a cold storage bin to achieve balanced feeding,
the heating temperature of the asphalt and the aggregate and the delivery temperature of the mixture are strictly controlled, the aggregate temperature is 20 ℃ higher than the asphalt temperature, the temperature of the hot mixed material finished product is not reduced by more than 10 ℃ after the hot mixed material finished product is stored in a storage bin, and the construction temperature of the asphalt mixture is strictly controlled according to the standard requirement. The asphalt heating temperature is 160-fold at 170 ℃, the aggregate heating temperature is 180-fold at 190 ℃, the mixture leaving temperature is 170-fold at 180 ℃ in the normal range (more than 190 ℃),
the mixing plant control room prints asphalt, various mineral aggregate consumption and mixing temperature disc by disc, and regularly checks the metering and temperature measurement of the mixing plant, the mixture is uniformly mixed, all aggregate particles are completely coated with asphalt binder, the mixing uniformity of the asphalt mixture is taken as a degree, a mixer takes a group of mixture samples every morning and afternoon to perform Marshall test and extraction screening test, the asphalt consumption, mineral aggregate grading and the physical and mechanical properties of asphalt concrete are detected, and guidance is provided for construction and production in time.
Carrying out total quantity control after each day is finished, and carrying out online spot check on the mineral aggregate gradation according to the use amount of each bin and the screening result of each bin; calculating the average construction gradation and the asphalt consumption, and checking the average construction gradation and the asphalt consumption with a design result; the average thickness was calculated as the daily output and checked against the pavement design thickness.
And (3) paving the mixed asphalt:
a. continuous and stable paving is carried out. The paving speed of the paver is adjusted according to the output of the mixer, the matching condition of the construction machine and the paving thickness, and is about 2-3m/mjn, generally not more than 3m/min, the speed is allowed to be reduced to 1-2m/min, and the paver can realize slow, uniform and uninterrupted paving. The vehicle must not be paved randomly for a few minutes quickly and then stopped for waiting for the next vehicle.
b. Before the mixture paved by the machine is not compacted, constructors can not trample the mixture, generally do not need to refit the mixture continuously by manpower, only under special conditions, under the guidance of field supervisors, the mixture is allowed to be manually supplemented or replaced, when the defects are serious, the mixture is removed, and a paver is adjusted or a paving process is improved.
c. The upper surface layer of the asphalt mixture is preferably paved by adopting a non-contact balance beam to control the paving thickness and a paver to realize combined operation.
d. The spreading machine should be adjusted to the best working state, the automatic material level devices at the two ends of the spiral material distributor are well adjusted, and the opening degree of a material door, the speed of a chain plate material feeder and the rotating speed of the spiral material distributor are matched. The material quantity of the spiral material distributor is higher than the center of the spiral material distributor, so that the mixture in front of a material baffle plate of an ironing plate is uniformly distributed in the full-width range, the material quantity is adjusted before starting every time, paving is performed, and the phenomenon of segregation of a spreading layer is avoided; and analyzing and adjusting whether the coarse and fine materials are uniform at any time, and detecting whether the loose paving thickness meets the specification. The screed is preheated to a specified temperature (not lower than 1000%) before paving, and the screed is subjected to a medium-strength ramming grade during paving, so that the initial compaction degree of paving is not less than 85%. The screed must be tightly spliced, not allowing gaps, to prevent the trapped aggregate from pulling the pavement out of the streak.
e. Attention is paid to the operation procedure of the receiving hopper of the paver to reduce the segregation of the coarse and fine materials. When the scraper blade of the collecting hopper of the paver is not exposed and hot materials with the thickness of about 10cm still exist, the next material transporting vehicle can unload the hot materials to continuously feed the materials and prevent the materials from being concentrated.
f. The paving is carried out at the high temperature time of the day, and the paving is not suitable when the temperature of the road surface is lower than the temperature of the road surface. When the spreading is in rain, the construction is immediately stopped, and the mixture which is not compacted and formed is removed. The mixture suffering from rain should be discarded and not be unloaded into a paver for paving.
g. Before the mixture is not compacted, the constructor can not step on the mixture. The paved mixture is generally forbidden to be repaired manually, the repair is needed when local defects are needed, the repair is needed under the guidance of field supervisors, the defects are removed when the defects are serious, and a paver is adjusted or a paving process is improved.
h. The thickness of the loose mat and the associated temperature should be checked at any time during the paving process. Before spreading, the screed is preheated to 100 ℃ by gas. In order to match the vibrating frequency and the amplitude, the paving surface layer has enough initial strength, and the exciting force of the paver is four-stage. The screed of the paver must be spliced tightly without gaps to prevent the pavement from being pulled out of streaks by the clamped aggregate.
j. The temperature of the mixture on site is not lower than 165 ℃, the spreading temperature is not lower than 160 ℃, the internal temperature of the mixture which is started to be rolled is not lower than 150 ℃, and the surface temperature after rolling is not lower than 110 ℃.
When the asphalt is rolled, the mixture is rolled and divided into a primary pressing part, a secondary pressing part and a final pressing part, and a double-steel-wheel road roller and the like are adopted as a compaction machine.
a. The initial pressing should be carried out at a higher temperature as much as possible under the conditions that the mixture is not pushed, cracked and the like, and a tire roller is forbidden to be used so as to ensure the transverse flatness of the surface layer.
b. The compaction speed of the road roller is required to be slow and uniform, and the determination is carried out according to different rolling stages and types of the road roller.
c. When the road roller rolls, the driving wheel faces the paver, the rolling route direction can not be changed suddenly, the road roller needs to slow down and slowly move when starting and stopping, braking is not needed, and the road roller is folded back and is not positioned on the same cross section.
d. The sections of initial pressure, re-pressure and final pressure are marked obviously, so that the driver can easily recognize the sections. Special posts are set for managing and checking the loose paving thickness, the rolling sequence, the combination of the road roller, the rolling times, the rolling speed and the rolling temperature, so that the surface layer does not leak or overpressure.
e. The spraying of the water solution to the road roller is in a fog shape, and the amount of the water solution is not adhered to the roller.
f. Machinery and vehicles are prohibited from being parked on the uncooled surface rolled on the same day, and mineral aggregates, oil and sundries are prevented from scattering. After 24 hours of compaction, the construction vehicle was allowed to pass.
And (3) rolling combination, namely a double-steel-wheel road roller, wherein the first time of rolling is carried out before and after static vibration, the second time of rolling is carried out before and after vibration (three times in total), the second time of rolling is carried out after full-width rolling (two times in total), and the full-width static pressure two-time walking speeds of the double-steel-wheel road roller are respectively 3km/h, 4km/h and 4 km/h.
And (3) treatment of construction joints:
transverse construction joint: all with a flat seam. Drawing a seam position at the position where the spreading layer is separated from the straight ruler along the longitudinal position by using a three-meter straight ruler, and cutting the seam position by using a sawing and sewing machine and then removing the seam position; when the spreading is continued, the mortar left when the spreading layer is sawed is scrubbed clean, a small amount of adhesive asphalt is coated, and the spreading machine screed starts spreading from the seam; when rolling, the steel cylinder type roller is used for transverse compaction, and the steel cylinder type roller gradually moves to a new pavement layer from a gap on a pavement layer paved firstly.
Maintaining an asphalt surface layer:
the section to be constructed is closed before construction, any vehicle except for construction is forbidden to enter, and the traffic can be opened after the construction is finished and the section is closed for 24 hours. After the construction is completed, all the construction machines cannot be parked on the uncooled construction section.
Providing a referential road structure parameter, referring to fig. 3, wherein 1 represents a 5-20 size graded crushed stone layer with the thickness of 200 mm; 2 represents a C25 pervious concrete base layer with the thickness of 150mm and the grain diameter of 5-12 mm; sealing: 0.6mm emulsified asphalt slurry seal (ES-2), bond: hot bitumen (0.4 kg/square meter) is not expressed and 3 is the bitumen face layer: 60mm colored pervious asphalt concrete (OGFC-13), which can be dark red. In practice, reference is made to Table 1 for the main materials, and the equipment which can be used mainly in the examples of the process of the invention is shown in Table 2.
The road surface constructed by the method has ecological environmental protection functions of water storage, waterlogging prevention, noise absorption, dust absorption, urban heat island effect alleviation and the like, improves the performance of the pervious concrete, greatly improves the strength, durability and water permeability of the pervious concrete, can effectively promote the popularization and application of the pervious concrete on road surfaces such as squares, two sides of walking streets, central isolation belts, park roads, parking lots and the like, and fully plays an important role in improving the urban function and keeping the better ecological environment of the city on the aspect of pervious concrete.
The specification and standard references involved in the method of the invention:
DGJ32/TJ61 specification for construction and acceptance of pervious concrete pavement;
technical Specification for concrete admixture application GB 50119;
"quality standard and detection method of crushed stone or pebble for ordinary concrete" JGJ 53.
TABLE 1
| Name (R) | Specification of | Number of |
| Concrete and its production method | C25 pervious concrete | Meet the engineering consumption |
| Graded broken stone | Meet the design and specification requirements | Meet the engineering consumption |
| Colorful asphalt pervious concrete (dark red) | OGFC-13 | Meet the engineering consumption |
| Emulsified asphalt | ES-2 | Meet the engineering consumption |
TABLE 2
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. A method for constructing colored asphalt pervious concrete for garden road features that the soil meeting the design requirement is chosen to backfill the roadbed of plain road layer by layer and compact it by layer, the smooth condition of roadbed foundation is tested, the roadbed quality is tested by ring cutting, the compact coefficient is not less than 0.93,
continuously paving graded broken stones, firstly constructing a cushion layer and then paving a sand filter layer,
then pouring a pervious concrete base layer, pouring bottom pervious concrete firstly in the pervious concrete base layer pouring, then pouring surface pervious concrete, curing the pervious concrete base layer, paving and pasting the road shoulder stone after the pervious concrete base layer is constructed and cured,
the construction of asphalt seal coat and asphalt adhesive coat is continued,
and constructing and maintaining an asphalt surface layer.
2. The method as claimed in claim 1, wherein the thickness of the crushed stone is controlled during the construction of the backing layer, an elevation control point is determined at a certain distance from the shoulder of the road before the construction of the crushed stone, the thickness of the crushed stone does not exceed the elevation control point, the graded crushed stone is rolled and the flatness is checked after the paving,
laying a sand filter layer on the cushion layer, selecting a coarse sand filter layer for leveling, spraying water in a proper amount and rolling and compacting.
3. The construction method of the garden path color asphalt pervious concrete as claimed in claim 1 or 2, characterized in that the pouring of the bottom layer pervious concrete is as follows:
the template is supported and erected, and the template is erected,
adding materials and stirring to prepare pervious concrete, firstly stirring aggregate and stirring water in advance, then adding cement and continuously stirring, finally adding the rest cement and stirring water,
paving and compacting the material in a blocking and bin-separating mode.
4. The method as claimed in claim 3, wherein the surface layer pervious concrete and the bottom layer pervious concrete are poured simultaneously, and the loose paving factor is 1.1-1.15 according to the dry humidity of the pervious concrete.
5. The method for constructing the colored asphalt pervious concrete for the garden road as claimed in claim 4, wherein the pervious concrete base layer is cured by adopting a mode of coating and watering after the surface layer pervious concrete is poured, the surface layer pervious concrete is cleaned by using clear water after the surface layer pervious concrete is cured, and after the surface is completely dried, the sealant is uniformly sprayed on the surface protection working surface.
6. The method for constructing colored asphalt pervious concrete for gardens and parks according to claim 4 or 5, characterized in that the pervious concrete for the surface layer is exposed aggregate pervious concrete, the surface treatment agent is adopted for pretreatment within 30 minutes after paving, washing is carried out after the pretreatment, impurities on the surface of the garden and park are removed, the natural color of natural stone is exposed, particles are not loosened, and then film covering and maintenance are continued.
7. The method as claimed in claim 6, wherein a blind pipe is buried at regular intervals when the shoulder stone is laid, and the blind pipe assists in draining rainwater seeped from the pervious asphalt pavement when the pervious concrete base layer reaches a full load of drainage load.
8. The method for constructing the colored asphalt pervious concrete for gardens and parks according to the claim 1 or 7, which is characterized in that the construction of an asphalt seal:
adopts the combined operation of an asphalt spreader and an aggregate spreader,
immediately spreading the aggregate by an aggregate spreader after spreading the asphalt,
after the main aggregate is spread, the road is immediately rolled from the roadside to the road center,
when the seal coat oil is spread, the permeable concrete base layer is covered by the film.
9. The method for constructing the garden road color asphalt pervious concrete according to claim 8, characterized in that the construction of the asphalt adhesive layer is as follows:
the viscous layer oil is sprayed by an asphalt spraying vehicle,
the viscous layer is constructed by selecting dry and hot weather, the sprayed viscous layer oil is even and vaporous and is evenly distributed into a thin layer in the whole width of the road surface,
spreading the viscous layer oil on the same day, paving the asphalt after the emulsified asphalt is demulsified and the water is evaporated,
when the viscous layer oil is spread, the permeable concrete base layer is covered by the film.
10. The method for constructing the colored asphalt pervious concrete for gardens and parks according to the claim 1 or 9, which is characterized in that the construction of an asphalt surface layer comprises the following steps:
the asphalt and the aggregate are mixed, the construction temperature of the asphalt mixture is strictly controlled according to the standard requirement,
paving the asphalt mixture, checking the loose paving thickness and the related temperature at any time,
and respectively carrying out primary pressing, secondary pressing and final pressing on the asphalt mixture.
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| CN115247390A (en) * | 2022-07-25 | 2022-10-28 | 广东青筑科技有限公司 | Cast-in-place micropore water guide pavement system and construction method |
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Application publication date: 20201023 |