CN217733647U - Environment-friendly road surface structure based on promote old road utilization ratio - Google Patents
Environment-friendly road surface structure based on promote old road utilization ratio Download PDFInfo
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Abstract
The utility model relates to a road engineering technical field especially relates to an environment-friendly road surface structure based on promote old road utilization ratio, supreme slip casting basic unit, high infiltration slurry seal, the cold regeneration of foam asphalt lower surface course, emulsified asphalt adhesive linkage, the compound pavement layer of formula of pouring and ultra-thin top facing layer are respectively down followed to environment-friendly road surface structure. The utility model discloses to highway overhaul project, carry out wicresoft's slip casting punishment to former road surface basic unit, repair the inside disease of former road surface basic unit structure earlier, strengthen the plate body nature of former road surface basic unit, improve former road surface basic unit intensity and antifatigue ability, again add the high infiltration emulsified asphalt slurry seal of spreading in the slip casting basic unit, utilize in the slurry seal of high infiltration emulsified asphalt unnecessary emulsified asphalt infiltration to former road surface basic unit, play the effect of bonding, further improve the plate body nature of former road surface basic unit. Can be matched with the service life of a newly paved road surface structure, and realizes resource utilization.
Description
Technical Field
The utility model relates to a road engineering technical field especially relates to an environment-friendly road surface structure based on promote old road utilization ratio.
Background
By now, the highway in Jiangsu province has completed about 80% of road network construction and has been changed from a stage of 'construction as a main' to a stage of 'maintenance as a main'. Wherein, in the expressway with traffic, nearly 70% of the traffic time of the expressway is more than 10 years, and 25% of the traffic time of the expressway is more than 15 years, and the end of the design life is approached or reached. Under the effect of long-term load and environmental factors, the performance of the highway material at the end of the design life is gradually attenuated, and diseases gradually occur, besides the apparent diseases of the road surface, the material performance attenuation and the recessive diseases such as interlayer badness, internal cracks, looseness and the like which occur in the structural layer are usually accompanied, and if the maintenance treatment is not carried out in time, the long-term performance of the whole pavement structure is adversely affected.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the utility model provides an environment-friendly road surface structure based on promote old road utilization ratio, aims at solving the inside disease of extension engineering old road structure more, and structural durability is poor, each performance decay's technical problem.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides an environment-friendly road surface structure based on promote old way utilization ratio, environment-friendly road surface structure is from supreme slip casting basic unit, high infiltration slurry seal, the cold regeneration of foam asphalt lower surface course, emulsified asphalt adhesive linkage, the compound pavement layer of formula of pouring and ultra-thin finish coat down respectively.
Preferably, the thickness of the ultra-thin overcoat is 2 to 3cm. And the thickness is thin, so that the later maintenance is easy. The ultra-thin cover coat adopts a U-PAVE mixture and has the performances of skid resistance, noise reduction, durability and the like. The U-PAVE mixture is prepared by adopting SBS modified asphalt, basalt aggregate (0-3mm, 3-6 mm and 6-11 mm), limestone mineral powder and a composite multi-effect reinforcing agent, adopting continuous gradation and designing according to a Marshall design method. Wherein the grading proportion of the basalt aggregate (0-3mm, 3-6mm, 6-11 mm) and the limestone ore powder is 0-3 mm: 3-6 mm: 6-11 mm: the mineral powder is 34:18:45:3.
preferably, the thickness of the pouring type composite pavement layer is 8-10 cm. The construction of the pouring type composite pavement layer is divided into two parts, firstly, a matrix asphalt mixture is paved, the matrix asphalt mixture is prepared by mixing matrix asphalt and basalt aggregates (0-3 mm, 3-6 mm and 6-11 mm), the void ratio is 18-28%, the communication void ratio is 12-26%, and the oil-stone ratio is 4.5-6.2%; and then mixing grouting materials and grouting to form the pouring type composite pavement. The grouting material is prepared by mixing a special grouting agent and water, wherein the special grouting agent is prepared by mixing cement, water, gravel, single-component polyether polyurethane and a strength improver according to the weight ratio of 100: 80-100: 30 to 50:3 to 6:3 to 8 in proportion. Guarantee the inside structural stability of surface course through base member bituminous mixture, the rethread mobility is bigger, and the grouting material that viscosity is lower fills in the space and supplements the space, improves the roughness and the closely knit degree of whole surface course, effectively prevents the high temperature rut deformation that the surface course exists under the foam asphalt cold recycling.
Preferably, the spraying amount of the emulsified asphalt sticky layer is 0.3kg/m 2 ～0.6kg/m 2 The emulsified asphalt adhesive layer mixture is prepared by mixing emulsified asphalt and water according to the weight ratio of 1:1, and the softening point of the wheel-nonstick emulsified asphalt is more than 75 ℃; the ductility at 15 ℃ is more than 30cm, the high and low temperature performance is good, the demulsification speed is high, and the construction efficiency is improved; after demulsification and hardening, can be achievedThe emulsified asphalt is non-wheel-sticking at 60 ℃, the 25 ℃ drawing strength of the emulsified asphalt is 1.5 times of that of common emulsified asphalt, the emulsified asphalt is a construction damage resistant quick-cracking emulsified asphalt, the emulsified asphalt has construction damage resistance, the emulsified asphalt can be constructed at normal temperature, and the spraying amount of the emulsified asphalt adhesive layer is 0.15kg/m when being converted into non-wheel-sticking emulsified asphalt 2 ～0.3kg/m 2 . The spraying amount can be more uniform within the range, and the demulsification effect is best.
Preferably, the thickness of the foamed asphalt cold-recycling lower surface layer is 16-22 cm. The cold regeneration of the foamed asphalt comprises the following steps of paving a recycled asphalt pavement material (RAP), foamed asphalt, cement and water according to a ratio of 100 by using cold regeneration equipment: 1.5-3.1: 1.3-1.5: 1.5 ~ 3.5 proportion mixes synthetic new mixture, retrieve bituminous paving material (RAP) and adopt the milling machine to mill bituminous paving back normal position collection, retrieve bituminous paving material (RAP) 100% regeneration, divide into two grades with 9.5mm as the boundary RAP, the utility model discloses the cold regeneration mixture of foamed asphalt who disposes is applicable to coarse grain formula gradation, medium grain formula gradation, foamed asphalt uses 90# pitch to add water preparation, and the pitch foaming temperature is 155 ~ 170 ℃, and the expansion rate is more than or equal to 16 times, and half life is more than or equal to 20s, the cement quantity should not exceed 1.5%, should not exceed 1.8%, and cement has positive effect to improving cold regeneration mixture early strength, water stability etc. but too big can bring the fatigue resistance to the mixture performance and can reduce, and the adverse effect such as shrinkage, temperature shrinkage deformation increase.
Preferably, the thickness of the high-permeability slurry seal layer is 1-2 cm. The mixture of high infiltration slurry seal adopts high infiltration emulsified asphalt and limestone macadam (0 ~ 5 mm) to mix and makes, and the oilstone ratio is 10%, the penetration depth of high infiltration emulsified asphalt is 7.41mm, compares the ordinary emulsified asphalt that the penetration depth is 3.63mm, and high infiltration emulsified asphalt can promote the oilstone ratio of slurry seal, can make unnecessary emulsified asphalt permeate to former road surface basic unit, plays the effect of bonding, further strengthens the plate body nature of basic unit.
Preferably, the grouting base layer is an original pavement base layer after grouting treatment. The method specifically comprises the following processing steps:
s01: carrying out hole stepping on the position to be reinforced; the hole distribution is carried out on the positions with poor interlamination and loose structure in a quincuncial pile form, the holes are staggered and distributed in sequence along the left and right wheel tracks and the middle of the lane in a quincuncial pile shape, the grouting amount and the grouting coverage area are increased, the slurry filling area is enlarged, spray paint is used as a mark, and the hole distribution distance on each line adopts different schemes of 50cm, 75cm, 100cm and 200 cm; and (3) aiming at the longitudinal seam, arranging holes in an I shape along the seam in sequence to fill the seam with the slurry, wherein the distance between adjacent holes is 55cm, and paint is sprayed as a mark.
S02: after hole distribution is finished, drilling holes at the marked positions by adopting automatic drilling equipment; the diameter of the drill bit is 20mm, the drilling angle is vertical, and the drilling depth is 40cm. The dust collector is used for sucking away the drilled dust in the drilling process, so that dust is prevented from being raised around the drill hole.
S03: after drilling is finished, deashing is carried out in a mode of 'sucking first and blowing later', holes are cleaned by using an air gun at first, a gun head hose penetrates into the bottom of a crack to be swept when the holes are cleaned, dust flies out of the holes in the process, the dust flies out of the holes when the dust flies out of the holes, the dust is considered to be cleaned, and blowing is still kept for 3-5 s at the moment to ensure that the holes are clean and free of dust.
S04: in order to more pertinently treat diseases existing in different positions, sealing assemblies (sealing rings) are pre-buried to different depths of 14cm, 20cm and 18cm respectively, grouting amounts of different positions are calculated, grout filling degrees of different positions are analyzed, and the road surface disease repairing fullness degree is verified. After the sealing assembly is embedded, a specially-made gun head penetrates through the central part of the sealing ring, so that the gun head is ensured to be firmly inserted and tightly connected.
S05: and then grouting is started and changes of grouting holes and surrounding pavements are observed. The slip casting liquid is the epoxy slip casting liquid, the utility model discloses a carry out wicresoft slip casting punishment to former road surface basic unit, repaired the inside disease of former road surface basic unit structure, strengthened the plate body nature of former road surface basic unit.
The utility model has the advantages that:
(1) The utility model discloses to highway overhaul engineering, carry out wicresoft's slip casting punishment to former road surface basic unit, repair the inside disease of former road surface basic unit structure earlier, strengthen the plate body nature of former road surface basic unit, improve former road surface basic unit intensity and antifatigue ability, add the high infiltration emulsified asphalt slurry seal of spreading again in the slip slurry seal of slip slurry basic unit, utilize in the slurry seal of high infiltration emulsified asphalt unnecessary emulsified asphalt infiltration to former road surface basic unit, play the effect of bonding, further improve the plate body nature of former road surface basic unit. Compared with the prior art, the utility model discloses highway after the overhaul has promoted the utilization ratio on old road, and road surface overall structure's durability is good, can with the life-span phase-match of the road surface structure of newly mating formation, realized resource utilization.
(2) The utility model discloses a set up the cold lower surface course of regenerating of foam pitch on the high infiltration slurry seal, the cold regeneration of foam pitch of adoption, green, energy saving and emission reduction, avoid the building stones extravagant, well surface course adopts the compound road surface of formula of pouring into simultaneously, the high temperature rut that exists on the lower surface course is out of shape under utilizing its high temperature resistance to deformation ability prevention foam pitch cold regeneration, it has combined bituminous paving and cement road surface's advantage, high temperature stability can be superior to traditional bituminous paving with low temperature crack resistance and fatigue resistance ability greatly. Meanwhile, the wheel-sticking-free emulsified asphalt has the advantages of construction damage resistance and strong bonding capacity, and improves the interlayer bonding strength between the lower surface layer of the foamed asphalt in cold regeneration and the poured composite pavement. And the surface layer selects 2-3 cm ultrathin cover surface to play a role in protecting the asphalt surface layer, so that the anti-skid property is improved, and the later maintenance is easy because the thickness is thinner. The utility model discloses a multi-level combination has improved the wholeness and the durability on road surface.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is the embodiment of the utility model provides an in the embodiment based on promote old way utilization ratio's environment-friendly road surface structure's the schematic diagram of cut-away.
Reference numerals: 01. grouting a base layer; 02. sealing a high-permeability slurry layer; 03. cold regenerating the lower surface layer with foamed asphalt; 04. pouring the composite pavement layer; 05. an ultrathin overcoat.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
The commercial material sources used in the following examples are as follows:
SBS modified asphalt, science and technology ltd of middle road science;
basalt aggregate (0-3mm, 3-6mm, 6-11 mm): jiangsu Yabang mining Co., ltd;
limestone mineral powder: jiangsu Yabang mining Co., ltd;
compound multi-effect reinforcing agent: zhonglu science and technology, inc.;
asphalt No. 90: zhongluo Ke science and technology GmbH;
cement: nanyang materials of Nanjing Henan, inc.;
sandstone: jiangsu Yabang mining Co., ltd;
the single-component polyether polyurethane: zhonglu science and technology, inc.;
strength enhancing agent: zhongluo Ke science and technology GmbH;
emulsified asphalt without sticking wheel (softening point > 75 deg.C; ductility > 30cm at 15 deg.C): zhonglu science and technology, inc.;
RAP: milling and planing on site;
foamed asphalt: zhongluo Ke science and technology GmbH;
limestone macadam (0-5 mm): jiangsu Yabang mining Co., ltd;
high penetration emulsified bitumen (penetration depth 7.41 mm): zhonglu science and technology, inc.;
epoxy resin grouting liquid: zhongluo Ke science and technology GmbH.
Example 1
As shown in the following figure 1, an environment-friendly pavement structure based on improvement of old road utilization rate comprises a grouting base layer 01, a 2cm high-permeability slurry seal layer 02, a 16cm foamed asphalt cold-regeneration lower surface layer 03, an emulsified asphalt adhesive layer, an 8cm pouring type composite pavement layer 04 and a 2cm ultrathin cover layer 05 from bottom to top.
Preferably, the construction of the pouring type composite pavement layer 04 is divided into two parts, firstly, a matrix asphalt mixture is paved, the matrix asphalt mixture is prepared by mixing 90# asphalt and basalt aggregates (0-3mm, 3-6 mm, 6-11 mm), the void ratio is 18%, the communication void ratio is 12%, and the oil-stone ratio is 4.5%; and then mixing the grouting material and grouting to form the pouring type composite pavement. The grouting material is prepared by mixing a special grouting agent and water, wherein the special grouting agent is prepared by mixing cement, water, gravel, single-component polyether polyurethane and a strength improver according to the weight ratio of 100:80:30:3:3 in a ratio of.
Preferably, the spraying amount of the emulsified asphalt sticky layer is 0.3kg/m 2 The emulsified asphalt adhesive layer mixture is prepared by mixing emulsified asphalt and water according to the weight ratio of 1:1, and mixing the components in a ratio of 1.
Preferably, the foamed asphalt cold recycling lower layer 03 is paved by using a cold recycling device to recycle asphalt pavement material (RAP) and foamed asphalt, cement and water according to the proportion of 100:1.5:1.3:1.5 proportion and mixing to obtain the new mixture.
The paving steps of the environment-friendly pavement structure based on improvement of the utilization rate of the old road in the embodiment are as follows:
s1, carrying out minimally invasive grouting treatment on an original pavement base, and repairing internal diseases of the original pavement base structure to obtain a grouting base 01;
s2, paving a high-permeability slurry seal layer 02 on the grouting base layer 01 and preserving;
s3, preparing a foamed asphalt cold-recycling mixture, and paving the foamed asphalt cold-recycling mixture on the high-permeability slurry seal 02 to obtain a foamed asphalt cold-recycling lower surface layer 03;
s4, after the maintenance of the foamed asphalt cold-regeneration lower surface layer 03 is finished, spraying wheel-sticking-free emulsified asphalt on the foamed asphalt cold-regeneration lower surface layer 03 to prepare an emulsified asphalt adhesive layer and maintain the emulsified asphalt adhesive layer;
s5, firstly paving a matrix asphalt mixture on the emulsified asphalt adhesive layer, then mixing and grouting the mixture to form a grouting type composite pavement layer 04;
s6, laying an ultrathin finish coat 05 on the poured composite pavement layer 04, and opening traffic after the temperature is reduced to 50 ℃.
TABLE 1 high penetration slurry seal technical index
| Mix type | High permeability slurry seal |
| Inspection item | Technical requirements |
| Mixing time | ＞120s |
| Consistency of | 2～3cm |
| 30min cohesion test | ≥1.2N·m |
| 60min cohesion test | ≥2N·m |
| Wear value of wet wheel wear test | ＜800g/m 2 |
TABLE 2 technical indexes of lower layer of foamed asphalt in cold regeneration
| Test items | Technical requirements |
| Freeze-thaw split strength ratio TSR (%) | ≥75 |
| Dynamic stability at 60 ℃ (times/mm) | Not less than 2000 (Top-coat) |
TABLE 3 technical index of emulsified asphalt adhesion layer
TABLE 4 grouting agent technical requirements
TABLE 5 technical requirements for matrix asphalt mixture
| Test items | Unit of | Technical requirements |
| Number of times of compaction | Next time | Double-sided compaction 50 |
| Void fraction | ％ | 18～28 |
| Interconnected porosity | ％ | 12～26 |
| Marshall stability | kN | >3.0 |
| Schrenberg asphalt leakage test | ％ | ≤0.5 |
| Kentucky fly test | ％ | ≤45 |
Table 6 technical indexes of poured composite pavement layer
TABLE 7 technical indices of ultra-thin finish coat
Example 2
As shown in the following figure 1, an environment-friendly pavement structure based on improvement of old road utilization rate comprises a grouting base layer 01, a 2cm high-permeability slurry seal layer 02, a 18cm foamed asphalt cold-regeneration lower surface layer 03, an emulsified asphalt adhesive layer, an 8cm pouring type composite pavement layer 04 and a 3cm ultrathin cover layer 05 from bottom to top.
Preferably, the construction of the filling type composite pavement layer 04 is divided into two parts, firstly, a matrix asphalt mixture is paved, the matrix asphalt mixture is prepared by mixing 90# asphalt and basalt aggregates (0-3 mm, 3-6 mm and 6-11 mm), the void ratio is 20%, the communication void ratio is 15% and the oilstone ratio is 5.0%; and then mixing grouting materials and grouting to form the pouring type composite pavement. The grouting material is prepared by mixing a special grouting agent and water, wherein the special grouting agent is prepared by mixing cement, water, gravel, single-component polyether polyurethane and a strength improver according to the weight ratio of 100:90:50:5:5 in a ratio.
Preferably, the spraying amount of the emulsified asphalt sticky layer is 0.4kg/m 2 The emulsified asphalt adhesive layer mixture is prepared from non-stick wheel emulsified asphalt and water according to the proportion of 1:1, and mixing the components in a ratio of 1.
Preferably, the foamed asphalt cold recycling lower layer 03 is paved by using a cold recycling device to recycle asphalt pavement material (RAP) and foamed asphalt, cement and water according to the proportion of 100:2.0:1.3:2.0 proportion of the mixture.
The paving steps of the environment-friendly road surface structure based on the improvement of the utilization rate of the old road in the embodiment are as follows
S1, performing minimally invasive grouting treatment on an original pavement base layer, and repairing internal diseases of the original pavement base layer structure to obtain a grouting base layer 01;
s2, paving a high-permeability slurry seal layer 02 on the grouting base layer 01 and preserving;
s3, preparing a foamed asphalt cold-recycling mixture, and paving the foamed asphalt cold-recycling mixture on the high-permeability slurry seal 02 to obtain a foamed asphalt cold-recycling lower surface layer 03;
s4, after the maintenance of the foamed asphalt cold-regeneration lower surface layer 03 is finished, spraying wheel-sticking-free emulsified asphalt on the foamed asphalt cold-regeneration lower surface layer 03 to prepare an emulsified asphalt adhesive layer and maintain the emulsified asphalt adhesive layer;
s5, firstly paving a matrix asphalt mixture on the emulsified asphalt adhesive layer, then mixing and grouting the mixture to form a grouting type composite pavement layer 04;
s6, paving an ultrathin overlay 05 on the poured composite pavement layer 04, and opening traffic after the temperature is reduced to 50 ℃.
Example 3
As shown in the following figure 1, an environment-friendly pavement structure based on improvement of old road utilization rate comprises a grouting base layer 01, a 2cm high-permeability slurry seal layer 02, a 20cm foamed asphalt cold-regeneration lower surface layer 03, an emulsified asphalt adhesive layer, a 9cm pouring type composite pavement layer 04 and a 3cm ultrathin cover layer 05 from bottom to top.
Preferably, the construction of the filling type composite pavement layer 04 is divided into two parts, firstly, a matrix asphalt mixture is paved, the matrix asphalt mixture is prepared by mixing 90# asphalt and basalt aggregates (0-3 mm, 3-6 mm, 6-11 mm), the void ratio is 25%, the communication void ratio is 25%, and the oilstone ratio is 6.0%; and then mixing grouting materials and grouting to form the pouring type composite pavement. The grouting material is prepared by mixing a special grouting agent and water, wherein the special grouting agent is prepared by mixing cement, water, gravel, single-component polyether polyurethane and a strength improver according to the weight ratio of 100:100:40:5: 7.
Preferably, the spraying amount of the emulsified asphalt sticky layer is 0.5kg/m 2 The emulsified asphalt adhesive layer mixture is prepared by mixing emulsified asphalt and water according to the weight ratio of 1:1 in proportion.
Preferably, the foamed asphalt cold recycling lower layer 03 is paved by using a cold recycling device to recycle asphalt pavement material (RAP) and foamed asphalt, cement and water according to the proportion of 100:3.0:1.5:3.0 proportion of the mixture to form a new mixture.
The paving steps of the environment-friendly road surface structure based on the improvement of the utilization rate of the old road in the embodiment are as follows
S1, performing minimally invasive grouting treatment on an original pavement base layer, and repairing internal diseases of the original pavement base layer structure to obtain a grouting base layer 01;
s2, paving a high-permeability slurry seal layer 02 on the grouting base layer 01 and preserving;
s3, preparing a foamed asphalt cold-recycling mixture, and paving the foamed asphalt cold-recycling mixture on the high-permeability slurry seal 02 to obtain a foamed asphalt cold-recycling lower surface layer 03;
s4, after the curing of the lower foamed asphalt cold-recycling layer 03 is finished, wheel-sticking-free emulsified asphalt is sprayed on the lower foamed asphalt cold-recycling layer 03 to prepare an emulsified asphalt adhesive layer and the curing is carried out;
s5, firstly paving a matrix asphalt mixture on the emulsified asphalt adhesive layer, then mixing and grouting the mixture to form a grouting type composite pavement layer 04;
s6, paving an ultrathin overlay 05 on the poured composite pavement layer 04, and opening traffic after the temperature is reduced to 50 ℃.
Example 4
As shown in the following figure 1, an environment-friendly pavement structure based on improvement of old road utilization rate comprises a grouting base layer 01, a 2cm high-permeability slurry seal layer 02, a 22cm foamed asphalt cold-regeneration lower surface layer 03, an emulsified asphalt adhesive layer, a 10cm pouring type composite pavement layer 04 and a 2cm ultrathin cover layer 05 from bottom to top.
Preferably, the construction of the filling type composite pavement layer 04 is divided into two parts, firstly, a matrix asphalt mixture is paved, the matrix asphalt mixture is prepared by mixing 90# asphalt and basalt aggregates (0-3 mm, 3-6 mm and 6-11 mm), the voidage is 18%, the communication voidage is 12% and the oilstone ratio is 4.5%; and then mixing grouting materials and grouting to form the pouring type composite pavement. The grouting material is prepared by mixing a special grouting agent and water, wherein the special grouting agent is prepared by mixing cement, water, gravel, single-component polyether polyurethane and a strength improver according to the weight ratio of 100:80:30:3:3 in a ratio of.
As a preferenceThe spraying amount of the emulsified asphalt sticky layer is 0.3kg/m 2 The emulsified asphalt adhesive layer mixture is prepared from non-stick wheel emulsified asphalt and water according to the proportion of 1:1 in proportion.
Preferably, the foamed asphalt cold recycling lower layer 03 is paved by using a cold recycling device to recycle asphalt pavement material (RAP) and foamed asphalt, cement and water according to the proportion of 100:1.5:1.3:1.5 proportion and mixing to obtain the new mixture.
The paving steps of the environment-friendly road surface structure based on the improvement of the utilization rate of the old road in the embodiment are as follows
S1, carrying out minimally invasive grouting treatment on an original pavement base, and repairing internal diseases of the original pavement base structure to obtain a grouting base 01;
s2, laying a high-permeability slurry seal layer 02 on the grouting base layer 01 and curing;
s3, preparing a foamed asphalt cold regeneration mixture, and paving the foamed asphalt cold regeneration mixture on the high-permeability slurry seal layer 02 to obtain a foamed asphalt cold regeneration lower surface layer 03;
s4, after the maintenance of the foamed asphalt cold-regeneration lower surface layer 03 is finished, spraying wheel-sticking-free emulsified asphalt on the foamed asphalt cold-regeneration lower surface layer 03 to prepare an emulsified asphalt adhesive layer and maintain the emulsified asphalt adhesive layer;
s5, firstly paving a matrix asphalt mixture on the emulsified asphalt adhesive layer, then mixing and grouting the mixture to form a grouting type composite pavement layer 04;
s6, paving an ultrathin overlay 05 on the poured composite pavement layer 04, and opening traffic after the temperature is reduced to 50 ℃.
Comparative example 1 (original pavement base directly performing mending treatment)
An environment-friendly pavement structure based on promotion old road utilization ratio, from supreme down for mending treatment original pavement basic unit, 2cm high infiltration thin paste seal 02, 16cm foam asphalt cold regeneration lower surface course 03, emulsified asphalt adhesion coating, 8cm compound pavement layer 04 of formula of pouring and 2cm ultra-thin finish coat 05.
Preferably, the construction of the filling type composite pavement layer 04 is divided into two parts, firstly, a matrix asphalt mixture is paved, the matrix asphalt mixture is prepared by mixing 90# asphalt and basalt aggregates (0-3 mm, 3-6 mm and 6-11 mm), the voidage is 18%, the communication voidage is 12% and the oilstone ratio is 4.5%; and then mixing the grouting material and grouting to form the pouring type composite pavement. The grouting material is prepared by mixing a special grouting agent and water, wherein the special grouting agent is prepared by mixing cement, water, gravel, single-component polyether polyurethane and a strength improver according to the weight ratio of 100:80:30:3:3 in a ratio of.
Preferably, the spraying amount of the emulsified asphalt sticky layer is 0.3kg/m 2 The emulsified asphalt adhesive layer mixture is prepared from non-stick wheel emulsified asphalt and water according to the proportion of 1:1 in proportion.
Preferably, the foamed asphalt cold recycling lower layer 03 is paved by using a cold recycling device to recycle asphalt pavement material (RAP) and foamed asphalt, cement and water according to the proportion of 100:1.5:1.3:1.5 proportion and mixing to obtain the new mixture.
The paving steps of the environment-friendly pavement structure based on the improvement of the utilization rate of the old road in the comparative example are as follows
S1, performing patching treatment on an original pavement base layer;
s2, paving a high-permeability slurry seal 02 on the original pavement base layer at the patching position and maintaining;
s3, preparing a foamed asphalt cold regeneration mixture, and paving the foamed asphalt cold regeneration mixture on the high-permeability slurry seal layer 02 to obtain a foamed asphalt cold regeneration lower surface layer 03;
s4, after the maintenance of the foamed asphalt cold-regeneration lower surface layer 03 is finished, spraying wheel-sticking-free emulsified asphalt on the foamed asphalt cold-regeneration lower surface layer 03 to prepare an emulsified asphalt adhesive layer and maintain the emulsified asphalt adhesive layer;
s5, firstly paving a matrix asphalt mixture on the emulsified asphalt adhesive layer, then mixing and grouting the mixture to form a grouting type composite pavement layer 04;
s6, laying an ultrathin finish coat 05 on the poured composite pavement layer 04, and opening traffic after the temperature is reduced to 50 ℃.
Comparative example 2 (without high penetration slurry seal, using a common slurry seal)
An environment-friendly pavement structure based on improvement of old road utilization rate comprises a grouting base layer 01, a 2cm common slurry seal layer, a 16cm foamed asphalt cold regeneration lower surface layer 03, an emulsified asphalt adhesive layer, an 8cm pouring type composite pavement layer 04 and a 2cm ultrathin finish coat 05 from bottom to top.
Preferably, the construction of the filling type composite pavement layer 04 is divided into two parts, firstly, a matrix asphalt mixture is paved, the matrix asphalt mixture is prepared by mixing 90# asphalt and basalt aggregates (0-3 mm, 3-6 mm and 6-11 mm), the voidage is 18%, the communication voidage is 12% and the oilstone ratio is 4.5%; and then mixing grouting materials and grouting to form the pouring type composite pavement. The grouting material is prepared by mixing a special grouting agent and water, wherein the special grouting agent is prepared by mixing cement, water, gravel, single-component polyether polyurethane and a strength improver according to the weight ratio of 100:80:30:3:3 in a ratio of the total weight.
Preferably, the spraying amount of the emulsified asphalt sticky layer is 0.3kg/m 2 The emulsified asphalt adhesive layer mixture is prepared by mixing emulsified asphalt and water according to the weight ratio of 1:1, and mixing the components in a ratio of 1.
Preferably, the foamed asphalt cold recycling lower layer 03 is paved by using a cold recycling device to recycle asphalt pavement material (RAP) and foamed asphalt, cement and water according to the proportion of 100:1.5:1.3:1.5 proportion and mixing to obtain the new mixture.
The paving steps of the environment-friendly pavement structure based on the improvement of the utilization rate of the old road in the comparative example are as follows
S1, performing minimally invasive grouting treatment on an original pavement base layer, and repairing internal diseases of the original pavement base layer structure to obtain a grouting base layer 01;
s2, paving a common slurry seal layer on the grouting base layer 01 and carrying out curing;
s3, preparing a foamed asphalt cold-recycling mixture, and paving the foamed asphalt cold-recycling mixture on the high-permeability slurry seal 02 to obtain a foamed asphalt cold-recycling lower surface layer 03;
s4, after the curing of the lower foamed asphalt cold-recycling layer 03 is finished, wheel-sticking-free emulsified asphalt is sprayed on the lower foamed asphalt cold-recycling layer 03 to prepare an emulsified asphalt adhesive layer and the curing is carried out;
s5, firstly paving a matrix asphalt mixture on the emulsified asphalt adhesive layer, then mixing and preparing a grouting material, and grouting to form a grouting type composite pavement layer 04;
s6, laying an ultrathin finish coat 05 on the poured composite pavement layer 04, and opening traffic after the temperature is reduced to 50 ℃.
Comparative example 3 (No poured composite pavement layer and ultrathin overlay; use of SBS modified asphalt SUP-20 middle overlay and SBS modified asphalt SMA-13 Upper overlay)
An environment-friendly pavement structure based on improvement of old road utilization rate comprises a grouting base layer 01, a 2cm high-permeability slurry seal layer 02, a 16cm foamed asphalt cold-recycling lower surface layer 03, an emulsified asphalt adhesive layer, a 6cm SBS modified asphalt SUP-20 middle surface layer and a 4cm SBS modified asphalt SMA-13 upper surface layer from bottom to top.
Preferably, the spraying amount of the emulsified asphalt sticky layer is 0.3kg/m 2 The emulsified asphalt adhesive layer mixture is prepared by mixing emulsified asphalt and water according to the weight ratio of 1:1, and mixing the components in a ratio of 1.
Preferably, the foamed asphalt cold recycling lower layer 03 is paved by using a cold recycling device to recycle asphalt pavement material (RAP) and foamed asphalt, cement and water according to the proportion of 100:1.5:1.3:1.5 proportion and mixing to obtain the new mixture.
The paving steps of the environment-friendly road surface structure based on the improvement of the utilization rate of the old road in the comparative example are as follows
S1, performing minimally invasive grouting treatment on an original pavement base layer, and repairing internal diseases of the original pavement base layer structure to obtain a grouting base layer 01;
s2, paving a high-permeability slurry seal layer 02 on the grouting base layer 01 and preserving;
s3, preparing a foamed asphalt cold regeneration mixture, and paving the foamed asphalt cold regeneration mixture on the high-permeability slurry seal layer 02 to obtain a foamed asphalt cold regeneration lower surface layer 03;
s4, after the maintenance of the foamed asphalt cold-regeneration lower surface layer 03 is finished, spraying wheel-sticking-free emulsified asphalt on the foamed asphalt cold-regeneration lower surface layer 03 to prepare an emulsified asphalt adhesive layer and maintain the emulsified asphalt adhesive layer;
s5, paving an SBS modified asphalt SUP-20 middle surface layer on the emulsified asphalt adhesive layer;
s6, paving an upper surface layer of SBS modified asphalt SMA-13 on the middle surface layer of SBS modified asphalt SUP-20, and opening traffic after curing.
Comparative example 4 (without foamed asphalt Cold recycled lower, poured composite pavement and ultra-thin overlay; using SBS modified asphalt SUP-25 lower, SBS modified asphalt SUP-20 middle and SBS modified asphalt SMA-13 upper)
An environment-friendly pavement structure based on improvement of old road utilization rate comprises a grouting base layer 01, a 2cm high-permeability slurry seal layer 02, an 8cm SBS modified asphalt SUP-25 lower surface layer, an emulsified asphalt adhesive layer, a 6cm SBS modified asphalt SUP-20 middle surface layer and a 4cm SBS modified asphalt SMA-13 upper surface layer from bottom to top.
Preferably, the spraying amount of the emulsified asphalt sticky layer is 0.3kg/m 2 The emulsified asphalt adhesive layer mixture is prepared by mixing emulsified asphalt and water according to the weight ratio of 1:1, and mixing the components in a ratio of 1.
The paving steps of the environment-friendly road surface structure based on the improvement of the utilization rate of the old road in the comparative example are as follows
S1, performing minimally invasive grouting treatment on an original pavement base layer, and repairing internal diseases of the original pavement base layer structure to obtain a grouting base layer 01;
s2, paving a high-permeability slurry seal layer 02 on the grouting base layer 01 and preserving;
s3, paving an SBS modified asphalt SUP-25 lower surface layer on the high-permeability slurry seal layer 02;
s4, spraying wheel-sticking-free emulsified asphalt to prepare an emulsified asphalt adhesive layer and maintaining;
s5, firstly paving an SBS modified asphalt SUP-20 middle surface layer on the emulsified asphalt adhesive layer;
s6, paving an upper surface layer of SBS modified asphalt SMA-13 on the surface layer of the SBS modified asphalt SUP-20.
And (3) testing the performance of the structural combination:
as can be seen from the above table, the examples 1 to 4 adopt different material ratios of the layers, have excellent structural properties, and have good road surface functions.
Compared with the embodiment 1, the method has the advantages that the grouting treatment is not used, the original pavement base layer is directly subjected to the patching treatment, and the data show that the fatigue life of the inorganic bonding material layer is longer than that of the embodiment 1, but the arrangement mode is not beneficial to energy conservation and environmental protection; the waste pavement structure materials are accumulated, so that the resource waste is generated, and the economical efficiency is poor.
Comparative example 2 compared to example 1, no high permeability slurry seal was added, and a normal slurry seal was used, which resulted in a decrease in the strength of the grouting base due to insufficient permeability of the emulsified asphalt in the slurry seal. The fatigue life of the inorganic bond layer is reduced by 0.013 x 10 10 The axis shows that the application adopts the high-permeability emulsified asphalt with the penetration depth of 7.41mm, so that the oilstone ratio of a slurry seal can be improved, the redundant emulsified asphalt is made to penetrate into the surface of a grouting base layer, and the plate body performance of the original pavement base layer is further improved.
Comparative example 3 with respect to example 1, no poured composite pavement layer and ultra-thin overlay was added; the use of the SBS modified asphalt SUP-20 middle surface layer and the SBS modified asphalt SMA-13 upper surface layer can find that the permanent deformation of the ruts is reduced by 1mm, which indicates that the middle surface layer adopts a pouring type composite pavement, the high temperature deformation resistance of the middle surface layer can be used for preventing the high temperature rut deformation of the lower surface layer of the foamed asphalt cold regeneration, the high temperature stability, the low temperature crack resistance and the fatigue resistance of the middle surface layer are greatly superior to those of the traditional asphalt pavement.
Comparative example 4 with respect to example 1, there was no foamed asphalt cold-recycled lower face layer, poured composite pavement layer, and ultra-thin overlay layer; the lower surface layer of SBS modified asphalt SUP-25, the middle surface layer of SBS modified asphalt SUP-20 and the upper surface layer of SBS modified asphalt SMA-13 are used, so that the permanent deformation of the track is reduced by 1.2mm, and the middle surface layer is a pouring type composite pavement, so that the high-temperature stability, the low-temperature crack resistance and the fatigue resistance are greatly superior to those of the traditional asphalt pavement in combination with the comparative example 3. The foam asphalt that this application adopted is cold to be regenerated simultaneously, green, energy saving and emission reduction, avoid the building stones extravagant.
It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides an environment-friendly road surface structure based on promote old road utilization ratio, its characterized in that, environment-friendly road surface structure is from supreme slip casting basic unit, high infiltration thin paste seal, the cold regeneration of foam asphalt lower surface course, emulsified asphalt adhesive linkage, the compound pavement layer of formula of pouring and ultra-thin finish coat respectively down.
2. The environmentally friendly pavement structure for improving utilization rate of old roads as claimed in claim 1, wherein the thickness of the ultra-thin overlay is 2 to 3cm.
3. The environment-friendly pavement structure for improving utilization rate of old roads as claimed in claim 1, wherein the thickness of the poured composite pavement layer is 8-10cm.
4. The environment-friendly pavement structure for improving the utilization rate of old roads as claimed in claim 1, wherein the thickness of the lower surface layer of the foamed asphalt in cold recycling is 16-22 cm.
5. The environment-friendly pavement structure based on improvement of utilization rate of old roads according to claim 1, wherein the thickness of the high-permeability slurry seal is 1-2cm.
6. The environment-friendly pavement structure based on improvement of utilization rate of old roads of claim 1, wherein the grouting base layer is an original pavement base layer after grouting treatment.
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