CN111455770B - Asphalt pavement splicing structure based on recycled materials and construction method thereof - Google Patents
Asphalt pavement splicing structure based on recycled materials and construction method thereof Download PDFInfo
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- CN111455770B CN111455770B CN202010304805.0A CN202010304805A CN111455770B CN 111455770 B CN111455770 B CN 111455770B CN 202010304805 A CN202010304805 A CN 202010304805A CN 111455770 B CN111455770 B CN 111455770B
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- 230000008929 regeneration Effects 0.000 claims abstract description 60
- 238000011069 regeneration method Methods 0.000 claims abstract description 60
- 239000004568 cement Substances 0.000 claims abstract description 45
- 238000001816 cooling Methods 0.000 claims abstract description 27
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- 239000010410 layer Substances 0.000 claims description 232
- 238000005096 rolling process Methods 0.000 claims description 61
- 238000004064 recycling Methods 0.000 claims description 25
- 238000003801 milling Methods 0.000 claims description 24
- 230000003068 static effect Effects 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 21
- 238000005056 compaction Methods 0.000 claims description 20
- 238000005507 spraying Methods 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 11
- 239000003365 glass fiber Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 8
- 238000005204 segregation Methods 0.000 claims description 8
- 238000003892 spreading Methods 0.000 claims description 8
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- 238000004140 cleaning Methods 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 7
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- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- YTAHJIFKAKIKAV-XNMGPUDCSA-N [(1R)-3-morpholin-4-yl-1-phenylpropyl] N-[(3S)-2-oxo-5-phenyl-1,3-dihydro-1,4-benzodiazepin-3-yl]carbamate Chemical compound O=C1[C@H](N=C(C2=C(N1)C=CC=C2)C1=CC=CC=C1)NC(O[C@H](CCN1CCOCC1)C1=CC=CC=C1)=O YTAHJIFKAKIKAV-XNMGPUDCSA-N 0.000 claims description 2
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Classifications
-
- 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
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
-
- 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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- 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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/187—Repairing bituminous covers, e.g. regeneration of the covering material in situ, application of a new bituminous topping
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The utility model provides a bituminous paving mosaic structure based on regeneration material and construction method thereof, new road structure layer and old road structure layer and mosaic structure contact side are step-like structure, and mosaic structure includes geogrid layer, water steady cold regeneration base layer, water steady lower basic unit, water steady upper basic unit, fine grid layer of glass, emulsified asphalt plant mix cold regeneration base layer and AC-25 lower floor that lays in proper order from bottom to top, water steady cold regeneration base layer, water steady lower basic unit and water steady upper basic unit all are equipped with V type slot with new road structure layer and old road structure layer's contact surface, and V type slot intussuseption is filled with and is used for guaranteeing that mosaic structure and new road structure layer and old road structure layer bond firm cement paste and fine aggregate. The invention mills and recycles the old road water-stable material, forms a new water-stable cooling regeneration sub-base mixture by crushing and screening and doping new aggregate, can greatly reduce the exploitation of non-renewable resources and simultaneously solves the problem that the waste building material occupies land resources for a long time.
Description
Technical Field
The invention relates to the field of road construction, in particular to an asphalt pavement splicing structure based on a recycled material and a construction method thereof.
Background
With the high-speed development of the economy in China, the traffic flow is increased, the road surface structural layer of the expressway built at early stage is damaged to different degrees, and in the reconstruction and expansion engineering of the expressway, the old road hard road shoulder structural layer is subjected to reverse excavation treatment to ensure that the newly paved road surface structural layer is firmly combined with the old road surface structural layer in order to prolong the service life of the road due to the fact that the old road hard road shoulder structural layer is different from a traffic lane. The foundation trench is deep and long and narrow in channel after reverse excavation, the original construction process is low in efficiency, and the new situation requirements cannot be met.
Therefore, a construction method is needed to improve the construction efficiency and the splicing quality in the reverse excavation water stabilization splicing treatment process.
Disclosure of Invention
The invention aims to provide an asphalt pavement splicing structure based on a recycled material and a construction method thereof, which aim to solve the technical problem of low construction efficiency in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
Asphalt pavement splicing structure based on recycled material, the contact side surfaces of the new road structure layer and the old road structure layer and the splicing structure are of step-shaped structures, and the asphalt pavement splicing structure is characterized in that: the splicing structure comprises a geogrid layer, a water-stable cold regeneration subbase layer, a water-stable lower base layer, a water-stable upper base layer, a glass fiber grating layer, an emulsified asphalt plant-mixed cold regeneration base layer and an AC-25 lower layer which are sequentially paved from bottom to top, V-shaped grooves are formed in the contact surfaces of the water-stable cold regeneration subbase layer, the water-stable lower base layer and the water-stable upper base layer with a new road structure layer and an old road structure layer, and cement paste and fine aggregates which are used for guaranteeing firm bonding of the splicing structure with the new road structure layer and the old road structure layer are filled in the V-shaped grooves.
Further preferably, the water-stable cold-recycling subbase layer, the water-stable lower base layer, the water-stable upper base layer, the emulsified asphalt plant-mixed cold-recycling subbase layer and the AC-25 lower layer respectively correspond to one layer of step, and the steps corresponding to the water-stable cold-recycling subbase layer, the water-stable lower base layer, the water-stable upper base layer and the emulsified asphalt plant-mixed cold-recycling subbase layer are equal in height.
Further, the thickness of the emulsified asphalt plant-mixed cold-recycling base layer is 10-12 cm, and the thickness of the water-stable lower base layer and the water-stable upper base layer is 18-20 cm; the grain size of the fine aggregate is 0-5 mm.
The construction method of the asphalt pavement splicing structure based on the recycled material is characterized by comprising the following steps of: comprises the steps of,
Step one, constructing a water stable cooling regeneration subbase layer, paving a layer of HDPE geogrid on the top surface of the subbase layer to form a geogrid layer after the roadbed at the splicing structure is accepted, and specifically comprising the following steps:
step a: uniformly spraying cement paste on the two side step vertical surfaces of the new road and the old road, paving water stops on the two side step vertical surfaces, uniformly paving fine aggregate on the outer side vertical surfaces of the water stops, wherein the paving height is 1/2 of the step height, and the water stops are isosceles right triangles;
Step b: paving a water stable cooling regeneration subbase mixture to form a water stable cooling regeneration subbase, compacting after the water stable cooling regeneration subbase is paved, keeping the steps at two sides at a distance of 30cm without compacting during rolling, excavating V-shaped grooves with a depth of 8-10 cm at the joint of a new road and an old road, then pouring cement paste with the filling amount that the cement paste does not infiltrate, and filling the V-shaped grooves with fine aggregates after the cement paste is poured;
Step c: firstly, compacting the reserved 30cm by static pressure once by using a road roller in a way of 10cm rolling each time, gradually extruding the water stable cooling regeneration mixture to the elevation of the step, wherein the road roller cannot be pressed on the step in the rolling process, and manually tamping the place which cannot be pressed by the road roller by using a leather hammer; timely covering after the construction of the water stable cooling regeneration subbase layer is completed, and sprinkling water for health maintenance;
step two, constructing a water stable lower base layer, cleaning the lower bearing layer before construction, and sprinkling a cement paste layer with a water cement ratio of 1:2, wherein the sprinkling amount is 2.0-3.0 kg/square meter, and specifically comprises the following steps:
Step d: step a;
Step e: b, paving the water-stable lower base layer mixture to form a water-stable lower base layer, and after the water-stable lower base layer is paved, paving the water-stable lower base layer mixture with the water-stable cooling regeneration base layer in the step b;
Step f: step c;
thirdly, constructing a water stable upper base layer, and performing a second step;
Step four: and (3) constructing an emulsified asphalt plant-mixed cold recycled base layer, and immediately spraying emulsified asphalt penetrating layer oil after finishing the construction of the base layer on a water-stable base layer, wherein the spraying amount is 1.55L/square meter, and the edges of the two sides of the penetrating layer oil are tightly covered by plastic films: before the emulsified asphalt plant-mixed cold-recycling base layer is paved, the lower bearing layer is protected and cleaned, so that no loose particles and dust and sundries pollution on the layer surface are ensured; meanwhile, spreading a layer of adhesive layer oil according to the requirement, synchronously paving a layer of 1m wide glass fiber grids on two sides of the steps to form glass fiber grid layers, cleaning and dedusting the contact surface of the old road structure layer and the cold regeneration, uniformly coating emulsified asphalt special for cold regeneration, and performing paving operation on the emulsified asphalt plant-mixed cold regeneration base layer mixture by adopting an asphalt paver to form a construction emulsified asphalt plant-mixed cold regeneration base layer, wherein no collecting material is exposed;
Step five: constructing the following layers of the AC-25: mixing and stirring the mixture of the lower layer of the AC-25, stirring by an intermittent asphalt stirrer for 45 seconds in each disc, thoroughly cleaning the lower bearing layer and step sundries before paving the lower layer, uniformly brushing emulsified asphalt on the side surface of the step to ensure firm bonding of new and old structural layers, paving the mixture of the lower layer of the AC-25 by adopting an asphalt paver to form the lower layer of the AC-25, and paving the mixture of the lower layer of the AC-25, wherein the paving step is the same as the step of paving the cold-mix plant-mixed regenerated basic layer of the emulsified asphalt, and the traffic can be opened after the surface temperature of the mixture is lower than 50 ℃.
Further, the loose paving coefficient of the water stable cooling regeneration subbase layer in the first step is 1.26, and the water stable cooling regeneration subbase layer mixture comprises the following components in percentage by weight, and coarse aggregate of 10-20 mm: 15 parts by weight; stable milling material with the thickness of 10-30 mm: 32 parts by weight; 5-10 mm of stable milling material: 24 parts by weight; 0-5 mm fine aggregate, 29 parts by weight; 3.2 parts by weight of cement; the water stable milling material is prepared from recycled old pavement materials through crushing and screening, and the cement paste water-cement ratio is 1:1.
Further, the loose laying coefficient of the water stable lower base layer in the second step is 1.30, and the water stable lower base laminated material comprises the following components: 20-30 mm coarse aggregate and 23 parts by weight; 10-20 mm coarse aggregate and 29 parts by weight; 5-10 parts of coarse aggregate and 20 parts of a weight part; 0-5 mm coarse aggregate, 28 parts by weight; 4.3 parts of cement.
Further, the emulsified asphalt plant-mixed cold regenerated basic layer mixture comprises the following components: 10-20 mm of asphalt milling material and 41 parts by weight; 5-10 mm of asphalt milling material, 19 parts by weight of 0-5 mm of asphalt milling material and 27 parts by weight of asphalt milling material; 10-20 parts of coarse aggregate and 10 parts of the following components in parts by weight; 3 parts of mineral powder; 1.5 parts by weight of cement; 3.8 parts by weight of emulsified asphalt; 3.3 parts by weight of water.
Further, the mixture of the lower layer of the AC-25 in the fifth step comprises the following components: 20-30 mm coarse aggregate and 18 parts by weight; 10-20 mm coarse aggregate and 30 parts by weight; 5-10 mm coarse aggregate and 21 parts by weight; 3-5 mm fine aggregate and 4 parts by weight; 0-3 parts of fine aggregate and 24 parts of a weight part; 3 parts of mineral powder.
In the fourth step, an asphalt paver is adopted to carry out paving operation on the emulsified asphalt plant-mix cold recycling base layer mixture to form a construction emulsified asphalt plant-mix cold recycling base layer, and the method specifically comprises the following steps:
step g: the asphalt spreader is adopted to perform spreading operation, so that sufficient feeding is ensured in the spreading process, the feeding can be timely carried out after the feeding is finished, and the feeding is not stopped in the middle; the paving speed of the mixture is coordinated with the feeding speed of the mixing station, constant-speed uninterrupted paving is kept, no intermediate shutdown is caused, the paving speed is controlled to be 2-3m/min, the spiral feeder of the paver is kept to rotate at a constant speed automatically in construction, the height of the mixture is kept to be not less than 2/3 of that of the feeder, segregation of the mixture is reduced, the paver slowly and continuously and uniformly walks, and the paving thickness and the transverse slope are checked at any time in the paving process;
Step h: initial pressure: after a section of the road is paved, a double-steel-wheel road roller is adopted to timely follow up the rolling for one time, a driving wheel forwards moves forward when the rolling is carried out, static pressure is carried out when the rolling is carried out, vibration is carried out when the rolling is carried out, the compacting speed is controlled to be 1.5-3km/h, the overlapping width of adjacent rolling belts is 20-30cm, and a water spraying device is used for intermittent water spraying; and (3) re-pressing: adopting a single steel wheel road roller to perform vibration pressing, wherein the number of the grinding passes is 2 times of strong vibration, the vibration is performed during forward movement, and the static pressure is performed during backward movement; the overlapping width of the adjacent rolling belts is 1/2-1/3 wheel, and the compaction speed is controlled to be 1.5-3km/h; after vibration, rolling by adopting a rubber-tired road roller, wherein the rolling number is 10 times, the rolling speed is 2-4km/h, and the overlapping width of adjacent rolling belts is 1/2-1/3 wheel; final pressure: and (3) adopting a double-steel-wheel road roller to carry out static pressure for two smooth surfaces at the speed of 2-4km/h, then sending special personnel to measure the flatness by using a three-meter ruler, and if the flatness is not met, continuing static pressure until the flatness meets the requirement.
Step i: after the emulsified asphalt plant-mixed cold-recycling base layer mixture is paved, when the double steel wheels and the single steel wheels are rolled, the cold-recycling base layer mixture is not compacted within the range of 10cm of the contact surface between the old road surface layer and the cold recycling base layer, after the single steel wheel road roller is rolled for 2 times, the top of the 10cm non-compacted area is filled with interface treatment liquid, the liquid filling quantity is proper to fill the bottom of the cold recycling layer, after the interface treatment liquid is filled, a single steel wheel road machine is adopted to roll along a joint, the rolling process of the tire roller is not changed, and the static vibration is generated before and after the rolling requirement; and after rolling, traffic is closed timely, natural health maintenance is carried out, the health maintenance time is not less than 3 days, and meanwhile, in order to avoid damage of the wheels to the surface layer, slow-cracking emulsified asphalt is uniformly sprayed on the regenerated base layer, and the spraying dosage is preferably 0.2 kg/square meter-0.4 kg/square meter.
More preferably, in the fifth step, the step of paving the mixture of the lower AC-25 layer by using an asphalt paver to form the lower AC-25 layer specifically includes the following steps:
Step j: the asphalt paving machine is adopted to carry out paving operation, the screed plate is heated in advance before paving, the heating temperature is not lower than 100 ℃, the asphalt mixture conveyed to the site is uniform and consistent, white materials are avoided, coarse and fine materials are not isolated and agglomerated, the temperature is not lower than 150 ℃, sufficient feeding is ensured in the paving process, the feeding of the next vehicle material can be timely carried out after the feeding of the previous vehicle material is finished, and the midway stop for waiting is avoided; the paving speed of the mixture is coordinated with the feeding speed of the mixing station, constant-speed uninterrupted paving is kept, no intermediate shutdown is caused, the paving speed is controlled to be 2-3m/min, the spiral feeder of the paver is kept to rotate at a constant speed automatically in construction, the height of the mixture is kept to be not less than 2/3 of that of the feeder, segregation of the mixture is reduced, the paver slowly and continuously and uniformly walks, and the paving thickness and the transverse slope are checked at any time in the paving process;
Step k: initial pressure: vibrating and rolling for 3 times by a double-steel-wheel vibrating road roller, wherein adjacent rolling belt tracks are overlapped by about 15-20cm by adopting a high-frequency low-amplitude mode, the compaction speed is 4-5km/h, and the initial-rolling finishing temperature is not lower than 110 ℃; and (3) re-pressing: adopting a rubber-wheel road roller to grind for at least 4 times, needing full-width grinding, wherein the length of a grinding section is about 30-50m, the number of double-compaction passes can ensure that the rubber-wheel tire has no obvious sticking wheel, the double-compaction section cannot coincide with the section which is not finished in initial compaction, the distance between the double-compaction section and the initial-compaction section is about 10m, and the finishing temperature of double-compaction is not lower than 80 ℃; final pressure: after the re-pressing is finished, a double-steel-wheel road roller is adopted to static pressure for two smooth surfaces at the speed of 2-4km/h, then a special person is dispatched to measure the flatness by using a three-meter ruler, and if the flatness is not met, the static pressure is continued until the flatness meets the requirement.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
1. The splicing parts of the contact side surfaces of the new road structure layer and the old road structure layer with the splicing structure can effectively ensure firm bonding and integral formation of the splicing parts of the new road and the old road by uniformly spraying water mud paste and fine aggregate.
2. Milling and recycling the old road water-stable material, crushing and screening, and doping new aggregate to form new water-stable cooling regeneration subbase mixture, thereby greatly reducing the exploitation of non-renewable resources and simultaneously solving the problem that the waste building material occupies land resources for a long time.
3. The production and the paving of the emulsified asphalt plant-mixed cold regenerated base layer mixture are operated under the normal temperature condition, no asphalt smoke is generated, the emission of harmful substances is obviously reduced, the construction condition is improved, and the health of on-site constructors is facilitated.
Drawings
FIG. 1 is a schematic structural view of an asphalt pavement splicing structure based on recycled materials;
FIG. 2 is a schematic illustration of a water stable cold recycling sub-base layer according to the present invention prior to construction;
FIG. 3 is a diagram of the water stable cooling regeneration sub-base layer construction process according to the invention;
Fig. 4 is a view illustrating construction of a glass fiber grid layer according to the present invention.
Reference numerals: 1-a geogrid layer; 2-water stable cooling regeneration of the subbase layer; 3-water stable lower base layer; 4-water stable upper base layer; 5-a glass fiber grid layer; 6-emulsified asphalt plant-mixing cold regeneration base course; 7-AC-25 lower layer; 8-a new road structure layer; 9-an old road structure layer; a 10-V-shaped groove; 11-water stop.
Detailed Description
The present invention will be further described below in order to make the technical means, innovative features, achieved objects and effects achieved by the present invention easy to understand.
The examples described herein are specific embodiments of the present application, which are intended to illustrate the inventive concept, are intended to be illustrative and exemplary, and should not be construed as limiting the application to the embodiments and scope of the application. In addition to the embodiments described herein, those skilled in the art can adopt other obvious technical solutions based on the disclosure of the claims and the specification, including technical solutions adopting any obvious substitutions and modifications to the embodiments described herein.
The contact sides of the new road structural layer 8 and the old road structural layer 9 and the splicing structure are of a step-shaped structure, the splicing structure comprises a geogrid layer 1, a water-stable cold regeneration subbase layer 2, a water-stable lower base layer 3, a water-stable upper base layer 4, a glass fiber grille layer 5, an emulsified asphalt plant-mixed cold regeneration subbase layer 6 and an AC-25 lower layer 7 which are sequentially paved from bottom to top, V-shaped grooves 10 are formed in the contact surfaces of the water-stable lower base layer 2, the water-stable upper base layer 3 and the water-stable upper base layer 4 with the new road structural layer 8 and the old road structural layer 9, cement paste and fine aggregates which are used for guaranteeing firm bonding of the splicing structure with the new road structural layer 8 and the old road structural layer 9 are filled in the V-shaped grooves 10, the water-stable cold regeneration subbase layer 2, the water-stable lower base layer 3, the water-stable upper base layer 4, the emulsified asphalt plant-mixed cold regeneration subbase layer 6 and the AC-25 lower surface layer 7 respectively correspond to one-layer step, the steps corresponding to the steps are equal, the thickness of the emulsified asphalt plant-mixed cold regeneration subbase layer 6-10 cm-12 cm and the water-stable base layer 18 cm-18 cm; the grain size of the fine aggregate is 0-5 mm.
The concrete construction steps are as follows:
1. water stable cooling regeneration subbase construction
1) Firstly, excavating an old road hard road shoulder and a spliced wide side road surface to a road bed top according to a construction design drawing, setting steps, after excavating to the road bed top, determining whether the road bed needs to be processed according to a deflection test result, and paving a layer of HDPE geogrid on the top surface of the road bed after the road bed is accepted by inspection, so that uneven sedimentation can be effectively reduced or avoided.
2) The loose paving coefficient of the water stable cooling regeneration subbase layer is 1.26, and the water stable cooling regeneration subbase layer mixture comprises the following components of 10-20 mm coarse aggregate: 15 parts by weight; stable milling material with the thickness of 10-30 mm: 32 parts by weight; 5-10 mm of stable milling material: 24 parts by weight; 0-5 mm fine aggregate, 29 parts by weight; 3.2 parts by weight of cement; the water stable milling material is prepared from recycled old pavement materials through crushing and screening. The water content is 1-2% greater than the optimal water content during construction, so that the loss of water in the transportation and paving processes is prevented, the construction quality is affected, and the asphalt milling material and the water stable milling material are both recovered old pavement materials and are prepared by crushing and screening; both the coarse aggregate and the fine aggregate are stone materials;
3) After site construction preparation is completed, cement paste is uniformly sprayed on the elevation of the steps on the two sides of the new and old roads (the water-cement ratio is 1:1), the spraying length is 20-30 m before the paving operation, the distance between the cement paste and the paver is kept between 10-15 m, and water stops are paved on the elevation of the steps on the two sides.
4) In order to avoid segregation of the mixture caused by concentration of large aggregates on steps in the paving process, fine aggregates are uniformly distributed on the steps on two sides manually before paving, wherein the distribution height is 1/2 of the height of the steps, and the mixture is isosceles triangle.
5) After the water stable cooling regeneration subbase layer mixture is paved, compacting is carried out according to a conventional construction mode, steps on two sides are reserved for 30cm and are not compacted when compacting is carried out, V-shaped grooves with the depth of 8-10 cm are excavated at joints of new and old roads, and cement paste is poured (the cement paste ratio is 1:1), wherein the pouring amount is proper that the cement paste does not infiltrate.
6) After the cement paste is poured, filling the V-shaped groove with sieved fine aggregate of 0-5mm, then using a road roller to carry out static pressure once for reserved 30cm, then using the road roller to carry out compaction in a way of rolling for 10cm each time, and gradually extruding the water stable cooling regeneration mixture to the elevation of the step. In the rolling process, the road roller cannot be pressed on the step, and the place where the road roller cannot be pressed is tamped by a manual leather hammer.
7) And (5) timely covering after the construction of the water stable cooling regeneration subbase layer is completed, and sprinkling water for health maintenance.
2. Construction of foundation layer under water stabilization
1) And after the water-stable subbase layer is cured and is detected to be qualified, preparing the lower subbase layer for water-stable construction. The loose paving coefficient of the base layer under water stabilization is 1.30, the mixing proportion of the mixture is shown in the following table, the water content is 1% greater than the optimal water content during construction, and the base layer mixture under water stabilization comprises the following components: 20-30 mm coarse aggregate and 23 parts by weight; 10-20 mm coarse aggregate and 29 parts by weight; 5-10 parts of coarse aggregate and 20 parts of a weight part; 0-5 mm coarse aggregate, 28 parts by weight; 4.3 parts of cement.
2) Before the construction of the water-stable lower base layer, the lower bearing layer should be cleaned, and a layer of cement paste (the water cement ratio is 1:2) is sprayed, and the spraying amount is 2.0-3.0 kg per square meter.
3) As shown in figures 2 and 3, cement paste is uniformly sprayed on the elevation of the steps at two sides (the water-cement ratio is 1:1) before paving, the spraying length is preferably 20-30 m before paving, the distance between the cement paste and the paver is kept 10-15 m, and water stops are paved on the elevation of the steps at two sides. Meanwhile, fine aggregates are uniformly distributed on the steps at the two sides, the height of each fine aggregate is 1/2 of that of each step, and each fine aggregate is in the shape of an inverted isosceles triangle.
4) After the base layer mixture under water stabilization is paved, compacting is carried out according to a conventional construction mode, steps on two sides are reserved for 30cm and are not compacted when compacting is carried out, V-shaped grooves with the depth of 8-10 cm are excavated at joints of new and old roads, and cement paste is poured (the water-cement ratio is 1:1), wherein the pouring amount is proper that the cement paste does not infiltrate.
5) After the cement paste is poured, the V-shaped groove is filled with fine aggregate manually, then the reserved 30cm is firstly static-pressed once by a road roller, then the road roller is compacted in a way of rolling 10cm each time, and the water-stable mixture is gradually extruded to the elevation of the step. In the rolling process, the road roller cannot be pressed on the step, and the place where the road roller cannot be pressed is tamped by a manual leather hammer.
The step part adopts static pressure, and the vibration compaction is forbidden, so that the damage to the lower step is prevented.
7) And (5) timely covering after the construction of the foundation layer under water stabilization is completed, and sprinkling water for health maintenance.
3. Construction of water stable upper base layer
The construction process of the water stable upper base layer is the same as that of the lower base layer.
After the construction of the base layer under water stabilization is completed, emulsified asphalt penetrating oil is sprayed in time, the spraying amount is 1.55L/square meter, and the edges of the two sides of the penetrating oil are tightly covered by plastic films.
4. Emulsified asphalt plant-mixing cold regeneration base layer construction
1) The emulsified asphalt plant-mixed cold regenerated basic layer mixture comprises the following components: 10-20 mm of asphalt milling material and 41 parts by weight; 5-10 mm of asphalt milling material, 19 parts by weight of 0-5 mm of asphalt milling material and 27 parts by weight of asphalt milling material; 10-20 parts of coarse aggregate and 10 parts of the following components in parts by weight; 3 parts of mineral powder; 1.5 parts by weight of cement; 3.8 parts by weight of emulsified asphalt; 3.3 parts by weight of water.
As shown in fig. 4, before the emulsified asphalt plant-mixed cold-recycling base layer is paved, the lower bearing layer is protected and cleaned, and the layer surface is ensured to be free from impurity pollution such as loose particles, dust and the like; meanwhile, a layer of adhesive layer oil is sprayed according to the requirements, and a layer of 1m wide glass fiber grating is paved on each side of the step synchronously.
Before paving and regenerating, the contact surface of the old pavement layer and the cold regeneration is cleaned and dedusted, and the special emulsified asphalt for cold regeneration is uniformly coated, so that the material collection is not exposed.
The asphalt spreader is adopted to perform spreading operation, the spreader ensures sufficient feeding in the spreading process, and ensures that the next vehicle can feed in time after the feeding vehicle is discharged, so that the vehicle is not stopped in the middle for waiting; the paving speed of the mixture is coordinated with the feeding speed of the mixing station, the mixture is continuously paved at a constant speed, no intermediate shutdown is caused, and the paving speed is controlled to be 2-4 m/min. The screw feeder of the paver is required to rotate at an automatic constant speed in construction, the height of the mixture is kept to be not less than 2/3 of that of the feeder, segregation of the mixture is reduced, and the paver slowly, continuously and uniformly walks. The thickness of the paving layer and the transverse slope are checked at any time in the paving process.
Rolling and pressing
① Initial pressure: the double-steel-wheel road roller is adopted to follow up rolling for one time after one section of paving, the driving wheel is forwards rolled, static pressure is adopted when the driving wheel is forwards rolled, vibration is adopted when the driving wheel is backwards moved, the compacting speed is controlled to be 1.5-3km/h, the overlapping width of adjacent rolling belts is 20-30cm, the water spraying device is used for intermittent water spraying, the non-sticking wheels are guaranteed, the principles of follow-up, slow-pressing, high-frequency and low-amplitude are achieved when the driving wheel is rolled, and the purposes of stabilizing voltage and guaranteeing flatness are achieved.
② And (3) re-pressing: the single steel wheel road roller is adopted for vibration pressing, and the number of the grinding passes is 2 times of strong vibration. To reduce cracks, vibration during forward movement is changed to static pressure during backward movement. The overlapping width of the adjacent rolling belts is 1/2-1/3 wheel, and the compaction speed is controlled to be 1.5-3km/h; and (3) rolling by using a rubber-tired road roller after vibration, wherein the number of rolling passes is 10, the rolling speed is 2-4km/h, and the overlapping width of adjacent rolling belts is 1/2-1/3 wheel.
③ Final pressure: and (3) adopting a double-steel-wheel road roller to carry out static pressure for two smooth surfaces at the speed of 2-4km/h, then sending special personnel to measure the flatness by using a three-meter ruler, and if the flatness is not met, continuing static pressure until the flatness meets the requirement.
Seam treatment at steps of new and old roads
After the cold-recycling mixture is paved, the cold-recycling mixture is not compacted within the range of 10cm of the contact surface between the old road surface layer and the cold-recycling surface when the double steel wheels and the single steel wheels are rolled. After the single steel wheel road roller rolls for 2 times, pouring interface treatment liquid into the top of the 10cm non-compacted area, wherein the liquid pouring quantity is preferably that the liquid is poured into the bottom of the cold regeneration layer.
And after the interface treatment fluid is poured, rolling along the joint by adopting a single steel roller road machine, wherein the rolling requires front static vibration and rear vibration, and the rolling procedure of the tyre roller is not changed.
7) And (5) immediately sealing traffic after rolling, and carrying out natural health preservation for at least 3 days. Meanwhile, in order to avoid the damage of the wheel to the surface layer, the slow-cracking emulsified asphalt can be uniformly sprayed on the regeneration layer, and the spraying dosage is preferably 0.2 kg/square meter-0.4 kg/square meter.
5. Construction of the AC-25 lower layer
1) The AC-25 lower layer mixture comprises the following components: 20-30 mm coarse aggregate and 18 parts by weight; 10-20 mm coarse aggregate and 30 parts by weight; 5-10 mm coarse aggregate and 21 parts by weight; 3-5 mm fine aggregate and 4 parts by weight; 0-3 parts of fine aggregate and 24 parts of a weight part; 3 parts of mineral powder. And (5) stirring by using an intermittent asphalt stirrer, wherein the stirring time of each disc is 45s.
Before paving the lower layer, thoroughly cleaning the lower bearing layer and step sundries, and uniformly brushing emulsified asphalt on the side surface of the step to ensure that the new and old structural layers are firmly bonded.
And (3) adopting an asphalt paver to carry out paving operation, and heating the screed plate in advance before paving, wherein the heating temperature is not lower than 100 ℃. The asphalt mixture delivered to the site should be uniform and consistent, free of white pattern material, free of segregation and caking phenomena of coarse and fine materials, and at a temperature of not less than 150 ℃. The sufficient feeding is ensured in the paving process, so that the feeding can be timely fed after the feeding is finished, and the feeding is not stopped in the middle; the paving speed of the mixture is coordinated with the feeding speed of the mixing station, the mixture is continuously paved at a constant speed, no intermediate shutdown is caused, and the paving speed is controlled to be 2-3m/min. The screw feeder of the paver is required to rotate at an automatic constant speed in construction, the height of the mixture is kept to be not less than 2/3 of that of the feeder, segregation of the mixture is reduced, and the paver slowly, continuously and uniformly walks. The thickness of the paving layer and the transverse slope are checked at any time in the paving process.
Rolling and pressing
① Initial pressure: the double steel wheel vibratory roller is vibrated and rolled for 3 times, and the adjacent rolling belt tracks are overlapped by about 15 cm to 20cm in a high-frequency low-amplitude mode. The compaction speed is 4-5km/h. The initial pressure finishing temperature is not lower than 110 ℃.
② And (3) re-pressing: the rubber tyre roller is adopted to roll for at least 4 times, full-width rolling is needed, the length of a rolling section is about 30-50m, the number of double-rolling passes can ensure that the rubber tyre has no obvious sticking wheel, the double-rolling section cannot coincide with the section which is not finished in initial rolling, and the distance between the double-rolling section and the initial-rolling section is about 10 m. The temperature for finishing the double pressing is not lower than 80 ℃.
③ Final pressure: after the back pressure is finished, adopting a double-steel-wheel road roller to static pressure for 2 times, and controlling the speed at 3-4km/h.
After the paving layer is completely naturally cooled and the surface temperature of the mixture is lower than 50 ℃, traffic can be opened.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. Asphalt pavement splicing structure based on recycled material, the contact side surfaces of a new road structure layer (8) and an old road structure layer (9) and the splicing structure are of step-shaped structures, and the asphalt pavement splicing structure is characterized in that: the splicing structure comprises a geogrid layer (1), a water-stable cold regeneration subbase layer (2), a water-stable lower base layer (3), a water-stable upper base layer (4), a glass fiber grille layer (5), an emulsified asphalt plant-mixed cold regeneration subbase layer (6) and an AC-25 lower surface layer (7) which are sequentially paved from bottom to top, V-shaped grooves (10) are formed in the contact surfaces of the water-stable cold regeneration subbase layer (2), the water-stable lower base layer (3) and the water-stable upper base layer (4) with a new road structure layer (8) and an old road structure layer (9), and cement paste and fine aggregates which are used for guaranteeing firm bonding of the splicing structure with the new road structure layer (8) and the old road structure layer (9) are filled in the V-shaped grooves (10); the water-stable cold regeneration subbase layer (2), the water-stable lower base layer (3), the water-stable upper base layer (4), the emulsified asphalt plant-mixed cold regeneration base layer (6) and the AC-25 lower layer (7) respectively correspond to one layer of step, and the steps corresponding to the water-stable cold regeneration subbase layer and the emulsified asphalt plant-mixed cold regeneration base layer are equal in height; the thickness of the emulsified asphalt plant-mixed cold recycling base layer (6) is 10-12 cm, and the thicknesses of the water stable lower base layer (3) and the water stable upper base layer (4) are 18-20 cm; the grain size of the fine aggregate is 0-5 mm.
2. The construction method of the asphalt pavement splicing structure based on the recycled material as defined in claim 1, wherein the construction method comprises the following steps: comprises the steps of,
Step one, constructing a water stable cooling regeneration subbase layer (2), after a road bed at a splicing structure is accepted, paving an HDPE geogrid layer on the top surface of the road bed to form a geogrid layer (1), and specifically comprising the following steps:
Step a: uniformly spraying cement paste on the two side step vertical surfaces of a new road and an old road, paving water stops (11) on the two side step vertical surfaces, uniformly paving fine aggregate on the outer side vertical surfaces of the water stops (11), wherein the paving height is 1/2 of the height of the steps, and forming an isosceles right triangle;
Step b: paving a water stable cooling regeneration subbase mixture to form a water stable cooling regeneration subbase (2), compacting after the water stable cooling regeneration subbase (2) is paved, not compacting steps at two sides by 30cm during compacting, excavating V-shaped grooves (10) with the depth of 8-10 cm at the joint of new and old roads, and then pouring cement paste with the filling amount being proper that the cement paste does not infiltrate, and filling the V-shaped grooves (10) with fine aggregates after the cement paste pouring is completed;
step c: firstly, compacting the reserved 30cm by static pressure once by using a road roller in a way of 10cm rolling each time, gradually extruding the water stable cooling regeneration mixture to the elevation of the step, wherein the road roller cannot be pressed on the step in the rolling process, and manually tamping the place which cannot be pressed by the road roller by using a leather hammer; timely covering after the construction of the water stable cooling regeneration subbase layer (2) is finished, and sprinkling water for health maintenance;
Step two, constructing a water stable lower base layer (3), cleaning the lower bearing layer before construction, and sprinkling a cement paste with a water cement ratio of 1:2, wherein the sprinkling amount is 2.0-3.0 kg/square meter, and specifically comprises the following steps:
Step d: step a;
step e: b, paving a water-stable lower base layer mixture to form a water-stable lower base layer (3), and after the water-stable lower base layer (3) is paved, paving the water-stable lower base layer mixture with the water-stable cold regenerated base layer (2) in the step b;
Step f: step c;
thirdly, constructing a water stable upper base layer (4), and performing a second step;
Step four: and (3) constructing an emulsified asphalt plant-mixed cold recycled base layer (6), and immediately spraying emulsified asphalt penetrating layer oil after finishing construction of the water-stable upper base layer (4), wherein the spraying amount is 1.55L/square meter, and the edges of the two sides of the penetrating layer oil are tightly covered by plastic films: before the emulsified asphalt plant-mixed cold regenerated base layer (6) is paved, the lower bearing layer is protected and cleaned, so that no loose particles and dust and sundry pollution are caused on the layer surface; meanwhile, spreading a layer of adhesive layer oil according to the requirement, synchronously paving a layer of 1m wide glass fiber grids on two sides of a step to form glass fiber grid layers (5), cleaning and dedusting the contact surface of an old road structure layer (9) and cold regeneration, uniformly coating cold regeneration special emulsified asphalt, and performing paving operation on the emulsified asphalt plant-mixed cold regeneration base layer mixture by adopting an asphalt paver to form a construction emulsified asphalt plant-mixed cold regeneration base layer (6);
Step five: construction of the AC-25 lower layer (7): mixing and stirring the mixture of the lower layer of the AC-25, stirring by an intermittent asphalt stirrer for 45 seconds in each disc, thoroughly cleaning the lower bearing layer and step sundries before paving the lower layer, uniformly brushing emulsified asphalt on the side surface of the step to ensure firm bonding of new and old structural layers, paving the mixture of the lower layer of the AC-25 by adopting an asphalt paver to form the lower layer (7) of the AC-25, and opening traffic after the paving layer is completely naturally cooled and the surface temperature of the mixture is lower than 50 ℃.
3. The construction method according to claim 2, wherein: the loose paving coefficient of the water stable cooling regeneration subbase layer (2) in the first step is 1.26, and the water stable cooling regeneration subbase layer mixture comprises the following components of coarse aggregates of 10-20 mm: 15 parts by weight; stable milling material with the thickness of 10-30 mm: 32 parts by weight; 5-10 mm of stable milling material: 24 parts by weight; 0-5 mm fine aggregate, 29 parts by weight; 3.2 parts by weight of cement; the water stable milling material is prepared from recycled old pavement materials through crushing and screening, and the cement paste water-cement ratio is 1:1.
4. The construction method according to claim 2, wherein: in the second step, the loose paving coefficient of the water stable lower base layer is 1.30, and the water stable lower base laminated material comprises the following components: 20-30 mm coarse aggregate and 23 parts by weight; 10-20 mm coarse aggregate and 29 parts by weight; 5-10 parts of coarse aggregate and 20 parts of a weight part; 0-5 mm coarse aggregate, 28 parts by weight; 4.3 parts of cement.
5. The construction method according to claim 2, wherein: the emulsified asphalt plant-mixed cold regenerated basic layer mixture in the fourth step comprises the following components: 10-20 mm of asphalt milling material and 41 parts by weight; 5-10 mm of asphalt milling material, 19 parts by weight of 0-5 mm of asphalt milling material and 27 parts by weight of asphalt milling material; 10-20 mm coarse aggregate and 10 parts by weight; 3 parts of mineral powder; 1.5 parts by weight of cement; 3.8 parts by weight of emulsified asphalt; 3.3 parts by weight of water.
6. The construction method according to claim 2, wherein: in the fifth step, the mixture of the AC-25 lower layer comprises the following components: 20-30 mm coarse aggregate and 18 parts by weight; 10-20 mm coarse aggregate and 30 parts by weight; 5-10 mm coarse aggregate and 21 parts by weight; 3-5 mm fine aggregate and 4 parts by weight; 0-3 parts of fine aggregate and 24 parts of a weight part; 3 parts of mineral powder.
7. The construction method according to claim 2, wherein: in the fourth step, an asphalt paver is adopted to carry out paving operation on the emulsified asphalt plant-mix cold recycling base layer mixture to form a construction emulsified asphalt plant-mix cold recycling base layer (6), and the method specifically comprises the following steps:
step g: the asphalt spreader is adopted to perform spreading operation, so that sufficient feeding is ensured in the spreading process, the feeding can be timely carried out after the feeding is finished, and the feeding is not stopped in the middle; the paving speed of the mixture is coordinated with the feeding speed of the mixing station, constant-speed uninterrupted paving is kept, no intermediate shutdown is caused, the paving speed is controlled to be 2-3m/min, the spiral feeder of the paver is kept to rotate at a constant speed automatically in construction, the height of the mixture is kept to be not less than 2/3 of that of the feeder, segregation of the mixture is reduced, the paver slowly and continuously and uniformly walks, and the paving thickness and the transverse slope are checked at any time in the paving process;
step h: initial pressure: after a section of the road is paved, a double-steel-wheel road roller is adopted to timely follow up the rolling for one time, a driving wheel forwards moves forward when the rolling is carried out, static pressure is carried out when the rolling is carried out, vibration is carried out when the rolling is carried out, the compacting speed is controlled to be 1.5-3km/h, the overlapping width of adjacent rolling belts is 20-30cm, and a water spraying device is used for intermittent water spraying; and (3) re-pressing: adopting a single steel wheel road roller to perform vibration pressing, wherein the number of the grinding passes is 2 times of strong vibration, the vibration is performed during forward movement, and the static pressure is performed during backward movement; the overlapping width of the adjacent rolling belts is 1/2-1/3 wheel, and the compaction speed is controlled to be 1.5-3km/h; after vibration, rolling by adopting a rubber-tired road roller, wherein the rolling number is 10 times, the rolling speed is 2-4km/h, and the overlapping width of adjacent rolling belts is 1/2-1/3 wheel; final pressure: static pressure is carried out on the two smooth surfaces at the speed of 2-4km/h by adopting a double-steel-wheel road roller, then a special person is dispatched to measure the flatness by using a three-meter ruler, and if the flatness is not met, the static pressure is continued until the flatness meets the requirement;
Step i: after the emulsified asphalt plant-mixed cold-recycling base layer mixture is paved, when the double steel wheels and the single steel wheels are rolled, the cold-recycling base layer mixture is not compacted within the range of 10cm of the contact surface between the old road surface layer and the cold recycling base layer, after the single steel wheel road roller is rolled for 2 times, the top of the 10cm non-compacted area is filled with interface treatment liquid, the liquid filling quantity is proper to fill the bottom of the cold recycling layer, after the interface treatment liquid is filled, a single steel wheel road machine is adopted to roll along a joint, the rolling process of the tire roller is not changed, and the static vibration is generated before and after the rolling requirement; and after rolling, traffic is closed timely, natural health maintenance is carried out, the health maintenance time is not less than 3 days, and meanwhile, in order to avoid damage of the wheels to the surface layer, slow-cracking emulsified asphalt is uniformly sprayed on the regenerated base layer, and the spraying dosage is preferably 0.2 kg/square meter-0.4 kg/square meter.
8. The construction method according to claim 2, wherein the step five of paving the AC-25 lower layer mixture by using an asphalt spreader to form the AC-25 lower layer (7) comprises the following steps:
Step j: the asphalt paving machine is adopted to carry out paving operation, the screed plate is heated in advance before paving, the heating temperature is not lower than 100 ℃, the asphalt mixture conveyed to the site is uniform and consistent, white materials are avoided, coarse and fine materials are not isolated and agglomerated, the temperature is not lower than 150 ℃, sufficient feeding is ensured in the paving process, the feeding of the next vehicle material can be timely carried out after the feeding of the previous vehicle material is finished, and the midway stop for waiting is avoided; the paving speed of the mixture is coordinated with the feeding speed of the mixing station, constant-speed uninterrupted paving is kept, no intermediate shutdown is caused, the paving speed is controlled to be 2-3m/min, the spiral feeder of the paver is kept to rotate at a constant speed automatically in construction, the height of the mixture is kept to be not less than 2/3 of that of the feeder, segregation of the mixture is reduced, the paver slowly and continuously and uniformly walks, and the paving thickness and the transverse slope are checked at any time in the paving process;
Step k: initial pressure: vibrating and rolling for 3 times by a double-steel-wheel vibrating road roller, wherein adjacent rolling belt tracks are overlapped by 15-20cm in a high-frequency low-amplitude mode, the compaction speed is 4-5km/h, and the initial-pressure finishing temperature is not lower than 110 ℃; and (3) re-pressing: adopting a rubber-wheel road roller to grind for at least 4 times, needing full-width grinding, wherein the length of a grinding section is 30-50m, the number of double-compaction passes can ensure that the rubber-wheel tire has no obvious sticking wheel, the double-compaction section cannot coincide with the section which is not finished in initial compaction, the distance between the double-compaction section and the initial-compaction section is kept at 10m, and the finishing temperature of double-compaction is not lower than 80 ℃; final pressure: after the re-pressing is finished, a double-steel-wheel road roller is adopted to static pressure for two smooth surfaces at the speed of 2-4km/h, then a special person is dispatched to measure the flatness by using a three-meter ruler, and if the flatness is not met, the static pressure is continued until the flatness meets the requirement.
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