CN219793502U - White-to-black pavement structure capable of resisting reflection cracks - Google Patents
White-to-black pavement structure capable of resisting reflection cracks Download PDFInfo
- Publication number
- CN219793502U CN219793502U CN202321173885.6U CN202321173885U CN219793502U CN 219793502 U CN219793502 U CN 219793502U CN 202321173885 U CN202321173885 U CN 202321173885U CN 219793502 U CN219793502 U CN 219793502U
- Authority
- CN
- China
- Prior art keywords
- layer
- asphalt
- white
- viscosity
- modified asphalt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010426 asphalt Substances 0.000 claims abstract description 99
- 239000004568 cement Substances 0.000 claims abstract description 39
- 239000011384 asphalt concrete Substances 0.000 claims abstract description 25
- 239000004575 stone Substances 0.000 claims description 48
- 239000002245 particle Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 11
- 238000005299 abrasion Methods 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 105
- 238000000034 method Methods 0.000 description 12
- 238000010276 construction Methods 0.000 description 9
- 238000003892 spreading Methods 0.000 description 7
- 230000007480 spreading Effects 0.000 description 7
- 239000000654 additive Substances 0.000 description 6
- 238000005336 cracking Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 239000011800 void material Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 238000005204 segregation Methods 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000007580 dry-mixing Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Landscapes
- Road Paving Structures (AREA)
Abstract
The utility model discloses a white-to-black pavement structure for resisting reflection cracks, which belongs to the technical field of road engineering and particularly relates to a white-to-black pavement structure for resisting reflection cracks, comprising an old cement pavement, a modified asphalt waterproof bonding layer, a large-grain-diameter gravel layer, a high-viscosity asphalt gravel layer, a high-modulus asphalt concrete layer and a wearing layer.
Description
Technical Field
The utility model relates to the technical field of road engineering, in particular to a white-to-black pavement structure for resisting reflection cracks.
Background
The cement pavement has high structural strength and long service life, but the damage repair is difficult to restore the original pavement service performance, and the driving comfort is poor. Asphalt concrete is additionally paved on the old cement pavement, namely white is changed into black, so that the traveling experience of residents can be obviously improved, and the method is accepted by a plurality of cities in China. The white-to-black pavement has high strength and strong deformation resistance, and few deformation diseases occur, but reflection cracks are always the biggest problem faced by the scheme. The reflection crack prevention measures are various in forms, and the main methods adopted so far are as follows in the test and exploration processes of measures for preventing and slowing down the reflection crack in the road engineering world at home and abroad: (1) increasing the thickness of the asphalt surface layer; (2) paving an interlayer of geosynthetic materials; (3) adding a stress absorbing layer; (4) setting a middle layer of asphalt mixture with large particle size; (5) setting a graded broken stone relief layer; (6) pre-slitting of the semi-rigid reinforcing layer + geosynthetic material; (7) and crushing and stabilizing the old cement concrete slab.
The geotextile, the glass fiber grating, the modified asphalt stress absorbing layer and the like are arranged between the old cement concrete pavement and the asphalt paving layer, so that the effect on delaying reflection cracks is not ideal, but reflection cracks still appear after a period of time; the thickness of the asphalt pavement is excessively increased or the middle layer of the asphalt mixture with large particle size is additionally arranged, so that the method is not economical; the impact compaction of the crushing plate reduces the bearing capacity of the original road surface, improves the complexity of design and construction, is economical and reasonable when the road surface plate is severely crushed and the breaking rate is higher, and is a resource waste for eliminating reflection cracks by adopting the crushing plate method for a plurality of cement road surfaces with better strength.
Some countries have developed researches on the aspect of adopting graded broken stone layers to prevent reflection cracks, a layer of high-quality graded broken stone crack relieving layers is paved between an old cement concrete pavement slab and an asphalt paving layer, the flip-chip structure with upper softness and lower rigidity not only fully utilizes the residual strength of the old cement concrete pavement, but also can reduce the reflection cracks of the asphalt paving layer, and the method is a measure with relatively reasonable technical and economical properties, and some attempts are made in China to obtain some research results. However, the graded broken stone needs to be cured, the construction period is longer, segregation is easy, the construction requirement is higher, the local segregation can bring great hidden trouble to the engineering quality, in addition, the graded broken stone is a loose layer, the deformation resistance is poor, thicker asphalt and a paving layer are needed to effectively bear the running load, and the cost is relatively high.
The reflection crack is a common problem of the conventional white-to-black pavement proposal, and the existing method with better solving effect mainly comprises two steps, namely, increasing the thickness of the asphalt mixture layer and breaking and petrochemical cement pavement. Increasing the thickness of the asphalt mixture layer can delay the time for reflecting the crack to the surface layer, but cannot completely avoid the generation of reflection crack; the cement pavement rubblizing technology disperses the concentrated distribution cracks among the rubble, eliminates stress concentration, has better solving effect on reflection cracks, almost completely loses the original structural strength of the cement pavement, and the upper layer needs to be paved with a water stabilization layer or a thicker asphalt concrete layer again, and the cement pavement rubblizing technology also faces the problem of reflection cracks of the water stabilization layer after being paved with the water stabilization layer, so that the thickened asphalt concrete layer has high manufacturing cost.
Disclosure of Invention
The present utility model is directed to a white-to-black pavement structure for resisting reflective cracking, so as to solve the problems set forth in the background art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a resist white black road surface structure that changes of reflection crack, includes old cement road surface, modified asphalt waterproof tie layer, big particle diameter metalling, high-viscosity asphalt metalling, high modulus asphalt concrete layer and wearing and tearing layer, the waterproof tie layer of modified asphalt sets up the upper end at old cement road surface, big particle diameter metalling sets up the upper end at the waterproof tie layer of modified asphalt, high-viscosity asphalt metalling sets up the upper end at big particle diameter metalling, high modulus asphalt concrete layer sets up the upper end at high-viscosity asphalt metalling, wearing and tearing layer sets up the upper end at high modulus asphalt concrete layer.
Preferably, the modified asphalt waterproof bonding layer is sprayed with 2.0-2.4kg/m of modified asphalt 2 。
Preferably, the large-particle diameter crushed stone layer is crushed stone with the particle diameter of 20-30mm and the thickness of 5-15cm.
Preferably, the high-viscosity asphalt crushed stone layer uses crushed stone with the diameter of 3-5mm and high-viscosity modified asphalt, and the high-viscosity modified asphalt has the dynamic viscosity of 60 DEG C>20000 Pa.s, asphalt dosage of 2-4kg/m 2。
Preferably, the high-viscosity modified asphalt is poured into the upper part of the lower large-particle-size gravel layer by 2-5cm.
Preferably, the thickness of the high modulus asphalt concrete layer is 4-9cm, and the dynamic stability of the mixture is higher than 8000 times/mm.
Preferably, the abrasion layer adopts abrasion-resistant aggregate and high-performance cementing material, and the thickness is 1.5-2.5cm.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the loose structure of the large-grain broken stone is utilized to reduce the concentrated stress at the crack of the cement pavement, so that the segregation risk of a graded broken stone scheme is avoided, modified asphalt is poured into the large-grain broken stone layer for connection to form a gradually-changed connection structure, the stress is gradually eliminated, the upper layer fills the small-grain broken stone to fill the gap, and the modified asphalt, the large-grain broken stone and the small-grain broken stone form a stress absorbing layer with strong deformability. The upper layer high modulus asphalt concrete structure has strong deformation resistance, high bearing capacity and good travelling comfort and wear resistance of the surface abrasion layer. The utility model fully utilizes the original strength of the old cement pavement, does not need to crush or clean the old cement board, utilizes the characteristic that the strength of large broken stone is high enough under the condition of boundary constraint, solves the problem of reflection crack of the white-to-black pavement by combining materials and structures, reduces the asphalt mixing process, saves energy, reduces emission, has low cost and has good market popularization value.
Drawings
Fig. 1 is a schematic view of a white-to-black pavement structure resistant to reflective cracking.
In the figure: 1 old cement pavement, 2 modified asphalt waterproof bonding layer, 3 large-grain diameter crushed stone layer, 4 high-viscosity asphalt crushed stone layer, 5 high-modulus asphalt concrete layer and 6 wearing layer.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Examples:
referring to fig. 1, the present utility model provides a technical solution: the utility model provides a resist white-to-black pavement structure of reflection crack, including old cement road surface 1, modified asphalt waterproof tie layer 2, big particle diameter gravel layer 3, high viscosity asphalt gravel layer 4, high modulus asphalt concrete layer 5 and wearing layer 6, a serial communication port, modified asphalt waterproof tie layer 2 sets up the upper end at old cement road surface 1, big particle diameter gravel layer 3 sets up the upper end at modified asphalt waterproof tie layer 2, high viscosity asphalt gravel layer 4 sets up the upper end at big particle diameter gravel layer 3, high modulus asphalt concrete layer 5 sets up the upper end at high viscosity asphalt gravel layer 4, wearing layer 6 sets up the upper end at high modulus asphalt concrete layer 5, modified asphalt waterproof tie layer 2 is SBS modified asphalt waterproof tie layer, play sealed cement road surface crack, prevent the effect that the infiltration of moisture influences the road bed, asphalt infiltration cement breakage inter-plate crack plays the stabilization effect to old cement board, bond upper strata big rubble on old cement road surface, form the constraint to the big particle diameter gravel of upper strata.
The modified asphalt waterproof bonding layer 2 can prevent water at the upper layer from entering the lower layer, so that roadbed is prevented from being influenced, the large-particle-size gravel layer 3 can effectively reduce concentrated stress of the old cement pavement, the concentrated stress is dispersed and released, the high-viscosity asphalt gravel layer 4 fixes the upper part of the large-particle-size gravel layer 3, the pavement construction is facilitated, an asphalt-rich gravel layer is formed, the deformation resistance is high, the stress transmitted by the gravel layer is further reduced, and a powerful support is provided for the upper pavement; the high-modulus asphalt concrete layer 5 has strong bearing capacity and strong pavement load resistance, reduces pavement deformation amplitude and reduces stress cracking risk; wearing layer 6 provides a road surface with comfortable and durable driving performance.
The old cement pavement 1 is used for treating the old cement concrete pavement with the void plate bottom, allows surface damage, cracking and plate breakage diseases to exist, and the stability of the old cement pavement 1 is crucial for long-term use of the pavement and is a durable foundation of the pavement.
2.0-2.4kg of modified asphalt is sprayed on the modified asphalt waterproof bonding layer 2.
The large-grain diameter gravel layer 3 is broken stone with grain diameter of 20-30mm and thickness of 5-15cm, the broken stone index meets the technical requirements of coarse aggregates in the construction specification of the highway asphalt pavement, and the broken stone index meets the technical requirements of the coarse aggregates in the construction specification of the highway asphalt pavement. The large-grain diameter crushed stone layer 3 can effectively reduce the concentrated stress of the old cement pavement, disperse and release the concentrated stress, and the large-grain diameter crushed stone avoids the maintenance and segregation of graded crushed stone, and has higher stability and low manufacturing cost.
The high-viscosity asphalt crushed stone layer 4 uses crushed stone with the diameter of 3-5mm and high-viscosity modified asphalt, and the high-viscosity modified asphalt has the dynamic viscosity of 60 DEG C>20000 Pa.s, asphalt dosage of 2-4kg/m 2 The broken stone index meets the technical requirement of coarse aggregates in the construction specification of the highway asphalt pavement, a large amount of high-viscosity modified asphalt is poured into the large broken stone to form an asphalt broken stone structure with gradually reduced asphalt from top to bottom, the stress at the crack of the bottom layer is transmitted step by step, the upward deformation capacity of the broken stone layer is gradually decreased step by step, and the concentrated stress of the bottom layer is released step by step. The high-viscosity asphalt pavement layer is used for fixing the upper part of the large-particle-size asphalt pavement layer, so that the construction of an upper asphalt pavement is facilitated, and a powerful support is provided for the upper pavement.
And pouring the high-viscosity modified asphalt into the upper part of the lower large-particle-size gravel layer for 2-5cm to form a gradual-change connecting structure.
The thickness of the high-modulus asphalt concrete layer 5 is 4-9cm, the dynamic stability of the mixture is higher than 8000 times/mm, the high-modulus asphalt concrete layer 5 has strong bearing capacity and strong pavement load resistance, the pavement deformation amplitude is reduced, and the fatigue cracking risk is reduced.
The wearing layer 6 adopts wear-resistant aggregate and high-performance cementing material, the thickness is 1.5 cm to 2.5cm, the ultrathin overlay pavement is attractive, and the comfortable and durable running performance is provided for the pavement.
The implementation method of the white-to-black pavement structure for resisting reflection cracks comprises the following specific steps:
step one: the method mainly comprises the steps of carrying out roughening treatment on an original pavement to ensure surface roughness and carrying out disease treatment on an old cement pavement, and mainly carrying out grouting treatment on a pumping mud of the original cement pavement and a plate bottom void part to ensure balanced pavement bearing capacity;
step two: sprinkling modified asphalt, wherein the modified asphalt adopts SBS modified asphalt with the weight of 2.0-2.4kg/m 2 ；
Step three: paving large-grain crushed stones with the grain diameter of 20-30mm, wherein the thickness is 5-15cm, widening one meter or curbstone for two times on the basis of the bearing layer to bind the large-grain crushed stone layer, and vibrating and rolling by using a heavy road roller;
step four: sprinkling high-viscosity modified asphalt on the surface of the large-particle diameter gravel layer, synchronously spreading gravel with the particle diameter of 3-5mm, wherein the gravel coverage rate is 60-80%, the smaller the gravel coverage rate is, the better the smaller the gravel coverage rate is, the more the gravel is only required to be crushed by a heavy-duty rubber-tire roller after the completion of the gravel spreading, the cleaning and recycling of the redundant gravel are carried out after the crushing of the rubber-tire roller, and the heavy-duty roller is used for vibration crushing after the completion of the gravel spreading, so that the stability of the gravel is ensured;
step five: spreading emulsified asphalt on the surface of the high-viscosity asphalt crushed stone layer after construction, paving a high-modulus asphalt concrete layer, wherein the thickness is 4-9cm, the high-modulus asphalt mixture is not limited to materials, gradations and additives, and the dynamic stability (60 ℃ and 0.7 MPa) is higher than 8000 times/mm;
step six: and (3) paving an ultrathin overlay of 1.5-2.5cm, sprinkling modified emulsified asphalt on the surface of the high-modulus asphalt concrete, paving a wearing layer, and wherein the ultrathin overlay asphalt mixture is not limited in materials, gradation and additives. The wearing layer directly bears the load of a vehicle, has high requirement on the adhesiveness of cementing materials, and the scattering loss of the mixture is lower than 5%.
Examples:
the thickness of each layer of the white-to-black structure of the old cement pavement is respectively set as shown in the following table, and the total thickness of the additional pavement is 17cm.
| Road surface level | Name of the name | Thickness of cm |
| 2 | Waterproof adhesive layer | - |
| 3 | Large particle diameter stone layer | 9 |
| 4 | High-viscosity asphalt crushed stone layer | - |
| 5 | High modulus asphalt concrete | 6 |
| 6 | Wearing layer | 2 |
Step 1, cleaning a pumping part of a raw cement pavement, loading a cement plate surface by using a heavy truck, reinforcing or replacing the plate surface with unstable compression, and ensuring the balance of pavement bearing capacity;
step 2, sprinkling a modified asphalt waterproof bonding layer;
the modified asphalt adopts SBS modified asphalt, and the sprinkling amount is 2.4kg/m 2 The spraying temperature was 180 ℃.
SBS modified asphalt meets the technical requirements of the following table
And 3, paving two gray soil layers with the width of 1m and the height of 17cm on the road shoulders on two sides of the old cement pavement to widen, and binding the large-grain-size gravel layer. Paving large-particle-size gravels with particle sizes of 20-30mm and thicknesses of 9cm, and carrying out vibration compaction by using a heavy road roller.
Step 4, sprinkling high-viscosity asphalt on the surface of the large-particle-size crushed stone layer, wherein the sprinkling temperature is 160 ℃, and the sprinkling amount is 3-4kg/m 2 . And synchronously spreading crushed stone with the particle size of 3-5mm, wherein the coverage rate of the crushed stone is suitable for non-sticking wheels. And after the broken stone spreading is finished, the heavy road roller is used for vibrating and rolling, so that the stability of broken stone is ensured. The high-viscosity modified asphalt requires that the dynamic viscosity at 60 ℃ is higher than 20000 Pa.s, the sprinkling temperature is 20 ℃ lower than that in the step 2, the asphalt viscosity is higher, and the accumulation is not easy to form at the bottom of the crushed stone layer.
The large-grain diameter crushed stone layer is rolled for one time after the paving is finished, but still has a larger void ratio, so that the asphalt is convenient to pour in the next step, and when the asphalt is poured in, uniform rolling is carried out, so that the asphalt pouring depth is ensured, and meanwhile, the good bonding strength and deformability of the upper part of the large-grain diameter crushed stone layer are ensured;
step 5, paving a high-modulus asphalt concrete layer, wherein the thickness of the high-modulus asphalt concrete layer is 6cm;
the selected coarse aggregate, fine aggregate and filler meet the standard requirements, the asphalt adopts A70# asphalt, and the additive adopts rubber-plastic composite additive R & P of Tian-Ji-Cheng-Co-Ltd.
The mineral aggregate grading is shown in the following table of AC-20C grading
The mixing mode of the mixture adopts a 'direct feeding and dry mixing' mode, firstly, all the aggregates and the R & P high modulus agent are added for dry mixing for 10s, then asphalt and mineral powder are added, the single-disc material mixing period is 45 seconds, wherein the R & P and the aggregates are dry mixed for more than 10 seconds, the discharging temperature of the mixture is 185 ℃, and the performance is shown in the following table.
| Technical index | Unit (B) | Results | Technical requirements |
| Bulk relative density of wool | / | 2.357 | Actual measurement |
| Void fraction | ％ | 3.5 | Actual measurement |
| Dynamic stability (60 ℃ C., 0.7 MPa) | Minor/mm | 12486 | ≥8000 |
| Stability degree | kN | 14.27 | ≥10 |
| Flow value | 0.1mm | 35 | 15-40 |
| Residual stability | ％ | 88 | ≥85 |
| Freeze thawing split residual strength ratio TSR | ％ | 85 | ≥80 |
| Low temperature bending failure strain (-10 ℃ C.) | με | 3165 | ≥2500 |
Paving and rolling are carried out according to normal production tissues;
step 6, additionally paving an ultrathin cover surface with the thickness of 1.5-2.5cm
The selected coarse aggregate, fine aggregate and filler meet the standard requirements, the asphalt adopts A70# asphalt, and the additive adopts a high-elasticity anti-cracking additive VE of the Tian-Ji-Cheng Co-Ltd in Beijing.
The mineral aggregate grading adopts ZTS-10, and the grading table is shown as follows
The mixing mode of the mixture adopts a direct casting and dry mixing mode, firstly, all the aggregates and VE are added and dry mixed for 10 seconds, then, asphalt and mineral powder are added, the mixing period of a single plate is 50 seconds, the discharging temperature of the mixture is 165 ℃, and the performance is shown in the following table.
| Technical index | Unit (B) | Results | Technical requirements |
| Theoretical maximum relative density | g/cm 3 | 2.495 | Actual measurement |
| Void fraction | ％ | 3.5 | 3～5 |
| Stability degree | KN | 9.9 | ≥8 |
| Residual stability | ％ | 92.9 | ≥85 |
| Freeze thawing split residual strength ratio | ％ | 87.1 | ≥80 |
| Kentaburg scattering loss | ％ | 1.5 | ≤5 |
| Rut stability (60 ℃ C.) | Minor/mm | 3665 | ≥3000 |
| Low temperature bending test (-10 ℃ C.) strain at break | με | 3247 | ≥3000 |
The spreading and rolling were performed according to normal production organization.
According to the white-to-black pavement structure and the implementation method, the original strength of the old cement pavement is fully utilized, the old cement board is not required to be broken or removed, the characteristic that the strength of large broken stone is high enough under the condition of boundary constraint is utilized, and the problem of reflection cracks of the white-to-black pavement is solved through the combination of materials and the structure. The asphalt mixing process is reduced, the energy is saved, the emission is reduced, the cost is low, and the market popularization value is good.
While the fundamental and principal features of the utility model and advantages of the utility model have been shown and described, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a resist white black road surface structure that changes of reflection crack, includes old cement road surface (1), modified asphalt waterproof tie layer (2), big particle diameter gravel layer (3), high-viscosity asphalt gravel layer (4), high modulus asphalt concrete layer (5) and wearing and tearing layer (6), its characterized in that, modified asphalt waterproof tie layer (2) set up the upper end at old cement road surface (1), big particle diameter gravel layer (3) set up the upper end at modified asphalt waterproof tie layer (2), high-viscosity asphalt gravel layer (4) set up the upper end at big particle diameter gravel layer (3), high modulus asphalt concrete layer (5) set up the upper end at high-viscosity asphalt gravel layer (4), wearing and tearing layer (6) set up the upper end at high modulus asphalt concrete layer (5).
2. The white-to-black pavement structure of claim 1, wherein the reflective crack is resisted, and wherein: the modified asphalt waterproof bonding layer (2) is sprayed with 2.0-2.4kg/m modified asphalt 2 。
3. The white-to-black pavement structure of claim 1, wherein the reflective crack is resisted, and wherein: the large-grain diameter crushed stone layer (3) is crushed stone with the grain diameter of 20-30mm and the thickness of 5-15cm.
4. The white-to-black pavement structure of claim 1, wherein the reflective crack is resisted, and wherein: the high-viscosity asphalt crushed stone layer (4) uses 3-5mm crushed stone and high-viscosity modified asphalt, and the high-viscosity modified asphalt has dynamic viscosity of 60 DEG C>20000 Pa.s, asphalt dosage of 2-4kg/m 2 。
5. The white-to-black pavement structure of claim 4, wherein: the high-viscosity modified asphalt is poured into the upper part of the lower large-particle-size gravel layer by 2-5cm.
6. The white-to-black pavement structure of claim 1, wherein the reflective crack is resisted, and wherein: the thickness of the high modulus asphalt concrete layer (5) is 4-9cm, and the dynamic stability of the mixture is higher than 8000 times/mm.
7. The white-to-black pavement structure of claim 1, wherein the reflective crack is resisted, and wherein: the abrasion layer (6) adopts abrasion-resistant aggregate and high-performance cementing material, and the thickness is 1.5-2.5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321173885.6U CN219793502U (en) | 2023-05-16 | 2023-05-16 | White-to-black pavement structure capable of resisting reflection cracks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321173885.6U CN219793502U (en) | 2023-05-16 | 2023-05-16 | White-to-black pavement structure capable of resisting reflection cracks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219793502U true CN219793502U (en) | 2023-10-03 |
Family
ID=88158010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321173885.6U Active CN219793502U (en) | 2023-05-16 | 2023-05-16 | White-to-black pavement structure capable of resisting reflection cracks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219793502U (en) |
-
2023
- 2023-05-16 CN CN202321173885.6U patent/CN219793502U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112726321B (en) | Full-thickness ultrathin long-life pavement structure and construction method thereof | |
| CN101619557B (en) | Pavement base course material prepared from brick mixed building rubbish regenerated aggregate and preparation method thereof | |
| CN202787044U (en) | Longitudinal crack treatment structure for bituminous concrete pavement | |
| CN106835973B (en) | Web-superhigh tenacity cement-base composite material combined bridge deck structure and method | |
| CN102051848B (en) | HMA/CC (Hot-Mix Asphalt)/(Cement Concrete) composite type pavement structure and constructing method thereof | |
| CN110593044A (en) | Sisal fiber reinforced cement-based composite material pavement road | |
| CN201296895Y (en) | Vertical cracking pavement repair structure | |
| CN113215907B (en) | Asphalt additional paving structure for old concrete pavement of urban road intersection and construction method thereof | |
| CN106120524A (en) | A kind of road construction method | |
| CN111622043A (en) | Drainage noise reduction type asphalt pavement paving structure | |
| CN101532273B (en) | Anti-rutting road surface RS2000 modified asphalt mixture proportion and construction technology | |
| CN111455768A (en) | Flexible roadbed asphalt concrete structure and construction method thereof | |
| CN110714389A (en) | Ultrathin high-performance composite semi-flexible surface layer pavement structure and construction method thereof | |
| CN212505685U (en) | Large-particle-size stone-filling roadbed full-asphalt pavement structure | |
| CN111501466B (en) | Method for paving full-asphalt pavement of large-particle-size stone-filling roadbed | |
| CN219793502U (en) | White-to-black pavement structure capable of resisting reflection cracks | |
| CN108360327A (en) | A kind of permanent seal cooling advanced composite material (ACM) road structure and construction method | |
| CN113152196A (en) | Reflection crack resistant pavement structure of ultrathin asphalt bonding layer of municipal road and construction method of reflection crack resistant pavement structure | |
| CN218779258U (en) | Solid waste comprehensive utilization inverted roadbed and pavement structure | |
| CN105040544B (en) | Large Longitudinal Slope section anti-rutting asphalt pavement structure | |
| CN216663671U (en) | Highway road surface pavement structure | |
| CN116043632A (en) | Functional layer used between semi-rigid base layer and asphalt pavement | |
| CN204780555U (en) | Structure that repaired in bituminous paving hole groove | |
| CN211256538U (en) | Ultrathin high-performance composite semi-flexible surface layer pavement structure | |
| CN215800759U (en) | Composite pavement structure suitable for heavy-load traffic road |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |