CN204000527U - A kind of old cement concrete pavement regeneration overlays road structure - Google Patents
A kind of old cement concrete pavement regeneration overlays road structure Download PDFInfo
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- CN204000527U CN204000527U CN201420326599.3U CN201420326599U CN204000527U CN 204000527 U CN204000527 U CN 204000527U CN 201420326599 U CN201420326599 U CN 201420326599U CN 204000527 U CN204000527 U CN 204000527U
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- old cement
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Abstract
The utility model discloses a kind of old cement concrete pavement regeneration and overlay road structure, this road structure for being equipped with successively from top to down upper layer, tack coat, lower surface layer, sealing, saturating layer and resonant rubbilizing layer above former sub-surface, and upper layer is that thickness is the AC-16 type compact continuous grading bituminous mixture layer of 5cm; Tack coat is that thickness is the SBR modified emulsifying asphalt layer of 0.05cm; Lower surface layer is that thickness is the ATB-25 type Asphalt Stabilized Macadam layer of 8cm; Sealing is that thickness is the rubber asphalt synchronous surface dressing of 2cm; Layer is that thickness is the high infiltration emulsified asphalt layer of 0.05cm thoroughly; Resonant rubbilizing layer is the old cement concrete pavement surface after resonant rubbilizing.Have that the reflection crack of preventing, adhesive property are good, the advantage such as good endurance and energy-conserving and environment-protective.
Description
Technical field
The utility model belongs to Communication and Transportation Engineering field, relates in particular to a kind of old cement concrete pavement regeneration and overlays road structure form, is mainly used in the engineering of old cement concrete pavement regeneration Laying Asphalt Surface Course.
Background technology
In old Cement Concrete Pavement Reconstruction, conventional method is direct Laying Asphalt Surface Course at present, but because former cement concrete slab connects, crack is in load and temperature, humidity can produce relative displacement under changing, cannot avoid reflection crack to occur.Old cement concrete pavement is carried out to regeneration at present still in the exploratory stage, also do not form form of structure and the method for designing that Cement Concrete Pavement Reconstruction overlays that be applicable to of a set of maturation, therefore how the regeneration of Rational choice cement concrete pavement overlays road structure is a current engineering difficult problem urgently to be resolved hurrily with the durability that ensures road surface.
Summary of the invention
The purpose of this utility model is, provides a kind of old cement concrete pavement regeneration to overlay road structure, and it has the advantages such as energy-saving and environmental protection, closely knit, anticracking and good endurance.
For realizing above-mentioned task, the utility model adopts following technical solution:
A kind of old cement concrete pavement regeneration overlays asphalt pavement structure, it is characterized in that, above old cement concrete pavement basic unit, be equipped with successively from top to down surface layer under AC-16 type continuous type dense bitumen compound upper layer, SBR modified emulsifying asphalt tack coat, ATB-25 type Asphalt Stabilized Macadam, rubber asphalt synchronous surface dressing, high infiltration emulsified asphalt layer, the old cement concrete pavement regeneration zone of resonant rubbilizing thoroughly;
Preferably, the thickness of described AC-16 type continuous type dense bitumen compound upper layer is 5cm; Under described ATB-25 type Asphalt Stabilized Macadam, the thickness of surface layer is 8cm; The thickness of described SBR modified emulsifying asphalt tack coat is 0.05cm; The rubber asphalt synchronous surface dressing that the thickness of described rubber asphalt synchronous surface dressing is 1cm～2cm; The described high infiltration emulsified asphalt thoroughly thickness of layer is 0.05cm.
Other feature of the present utility model is:
In described SBR modified emulsifying asphalt tack coat, the spread quantity of SBR modified emulsifying asphalt is 0.3kg/m
2～0.5kg/m
2
The spread quantity of the mulseal in the saturating layer of described high infiltration emulsified asphalt is 0.8kg/m
2～1.2kg/m
2.
In described rubber asphalt synchronous surface dressing, the spread quantity of rubber powder is 1.6kg/m
2～2.2kg/m
2; Rubble spreading amount is 8kg/m
2～10kg/m
2.
The old cement concrete pavement regeneration zone of described resonant rubbilizing comprises loose rubble permeable structure layer and the thick fine and close closed construction layer of interlocking fragment of 8cm～18cm that 3cm～8cm is thick, and the fine and close closed construction layer of interlocking fragment is positioned at the below of loose rubble permeable structure layer.
The asphalt pavement structure overlaying for old cement concrete pavement regeneration of the present utility model, tool has the following advantages:
(1) functional performance is good
Cement concrete pavement is adopted to the regeneration of resonant rubbilizing technology, then overlay the road structure of flexible pavement thereon, overturn old cement concrete pavement surface has been done to the rear traditional method that directly overlays the bituminous concrete that one deck is new of some pluckings processing, rigid pavement is become to flexible pavement, after having eliminated traditional old Cement Concrete Pavement hot asphalt mixture cover, intrinsic cracking, aspect separates and the phenomenon such as damage, staggered floor coming off, moisture causes, and improved functional performance and the road-ability on road surface.
(2) prevent reflection crack
Old cement concrete pavement is carried out after resonant rubbilizing processing, and due to the dimensional characteristic of fragment after rubblization fragmentation, broken cement sheeting has good even intensity, becomes a kind of flexible structure, has greatly reduced the appearance of reflection crack.In addition, rubber asphalt synchronous surface dressing has good non-deformability, can increase substantially the cracking resistance of resonant rubbilizing Base Asphalt Pavement, effectively reduces reflection cracking in a pavement.
(3) excellent in durability
The mineral aggregate gradation optimization principles of ATB-25 and AC-16 is to form skeleton with coarse aggregate, fills the space in skeleton with fine aggregate, forms skeleton embedded squeezing compact structure, makes that asphalt overlay is both closely knit not to seep water, and has again higher high temperature permanent deformation resistance.
(4) interlaminar bonding performance is good
Rubber asphalt synchronous surface dressing, high infiltration emulsified asphalt thoroughly layer are combined closely with basic unit, bond strength between layers and shear strength are 2～5 times of common sealing, there is good interlayer combination, can effectively avoid producing inter-laminar shear failure under Driving Loading.
(5) economical environment-protective
Resonant rubbilizing technology takes full advantage of the fragment after old cement concrete pavement fragmentation, not only reduce white pollution, also save waste material transportation cost, shorten the duration, significantly reduce construction costs, there is the double effects of economic environmental protection, responded country about the call of setting up conservation-minded society.
Brief description of the drawings
Fig. 1 is the road structure schematic cross-sectional view overlaying for old cement concrete pavement regeneration of the present utility model.
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Detailed description of the invention
The AC-16 type continuous type dense bitumen mixing bed of material of the present utility model is made up of SBS modifier, matrix pitch and mineral aggregate, and wherein matrix pitch is A-90 pitch, and the mixed ratio example of SBS modifier and matrix pitch is 4.5:95.5.
Mixture gradation scope in the AC-16 type continuous type dense bitumen mixing bed of material of the present utility model is: be 100% by the quality percentage of 19mm sieve aperture, be 95%～100% by the quality percentage of 16mm sieve aperture, be 75%～90% by the quality percentage of 13.2mm sieve aperture, be 58%～72% by the quality percentage of 9.5mm sieve aperture, be 35%～45% by the quality percentage of 4.75mm sieve aperture, be 23～32% by the quality percentage of 2.36mm sieve aperture, be 15%～24% by the quality percentage of 1.18mm sieve aperture, be 12%～20% by the quality percentage of 0.6mm sieve aperture, be 8%～15% by the quality percentage of 0.3mm sieve aperture, be 6%～10% by the quality percentage of 0.15mm sieve aperture, be 4%～7% by the quality percentage of 0.075mm sieve aperture.
ATB-25 Asphalt Stabilized Macadam layer of the present utility model is made up of matrix pitch, coarse aggregate, fine aggregate and breeze, and wherein matrix pitch is A-70 pitch.
The grading limit of the compound in ATB-25 Asphalt Stabilized Macadam layer of the present utility model is: be 100% by the quality percentage of 31.5mm sieve aperture, be 92%～100% by the quality percentage of 26.5mm sieve aperture, be 67%～80% by the quality percentage of 19mm sieve aperture, be 58%～68% by the quality percentage of 16mm sieve aperture, be 52%～61% by the quality percentage of 13.2mm sieve aperture, be 40%～50% by the quality percentage of 9.5mm sieve aperture, be 25%～33% by the quality percentage of 4.75mm sieve aperture, be 15～23% by the quality percentage of 2.36mm sieve aperture, be 10%～16% by the quality percentage of 1.18mm sieve aperture, be 7%～13% by the quality percentage of 0.6mm sieve aperture, be 5%～9% by the quality percentage of 0.3mm sieve aperture, be 4%～8% by the quality percentage of 0.15mm sieve aperture, be 4%～7% by the quality percentage of 0.075mm sieve aperture.
Rubber asphalt synchronous surface dressing of the present utility model is made up of rubber powder, matrix pitch and rubble, wherein: the bias tire rubber powder that rubber powder selects 20 order～40 order normal temperature to grind, matrix pitch is No. A-90 or A-70 pitch, and rubble is 9.5mm～16mm high-quality rubble; Rubber powder volume is 18%～25% of matrix pitch quality, and spread quantity is 1.6kg/m
2～2.2kg/m
2; Rubble spreading amount is 8～10kg/m
2.
High infiltration emulsified asphalt of the present utility model thoroughly layer spread quantity is 0.8kg/m
2～1.2kg/m
2, technical requirement is: particle charging is anion; On sieve, surplus is for being not more than 0.1%; De-emulsification speed is for splitting slowly; Pitch normal viscosity is 8s～12s; Evaporated residue content is for being not less than 40%; Evaporated residue needle penetration is 5mm～30mm; Evaporated residue softening point is for being not less than 45%; 15 DEG C of ductilities of evaporated residue are for being not less than 10cm; 1d bin stability is for being not more than 1%; 5d bin stability is for being not more than 5%.
The old cement concrete pavement regeneration zone 6 of resonant rubbilizing of the present utility model is the old cement concrete pavement surface after fragmentation, and top is the loose rubble permeable structure of 3cm～8cm, and bottom is the fine and close closed construction of 8cm～18cm interlocking fragment.Specific embodiments is: clear up old cement concrete pavement pitch patching material; Adopt the capable fragmentation of resonance crusher, work tup contacts with road surface, tup width is 25mm～35mm, the sensor of work on tup by the vibrational feedback on road surface to computer, automatically regulate vibration frequency by computer, make cement panel under tup, in subrange, produce resonance, old cement concrete slab is cracked, form the loose macadam in top, the block stone layer of bottom interlocking densification.Artificial remove that old Portland Cement Concrete Surface Course on rubblization layer connects, strip filler between crack and be greater than the fragment of 10cm; Watering starts to roll while reaching optimum moisture content, adopts respectively steel-wheeled vibrated roller, rubber-tyred roller, steel-wheeled vibrated roller to carry out first pressing, multiple pressure, final pressure.
Below the specific embodiment that inventor provides, so that the technical solution of the utility model is further explained to explanation.
Embodiment:
Referring to Fig. 1, the present embodiment provides a kind of road structure overlaying for old cement concrete pavement regeneration of concrete form, comprise, be positioned at surface layer 3, rubber asphalt synchronous surface dressing 4, high infiltration emulsified asphalt layer 5, the old cement concrete pavement regeneration zone 6 of resonant rubbilizing thoroughly under the AC-16 type continuous type dense bitumen compound upper layer 1 that is equipped with successively above former sub-surface 7 from top to bottom, SBR modified emulsifying asphalt tack coat 2, ATB-25 type Asphalt Stabilized Macadam; Wherein:
It is the AC-16 type continuous type dense bitumen mixing bed of material of 5cm that AC-16 type continuous type dense bitumen compound upper layer 1 adopts thickness, the AC-16 type continuous type dense bitumen mixing bed of material is made up of SBS modifier, matrix pitch and mineral aggregate, SBS modifier is plant produced, matrix pitch used is A-90 bi tumenf orr oad, and wherein the mixed ratio of SBS modifier and matrix pitch example is 4.5:95.5.SBS modified bitumen can directly process at the construction field (site), also can purchase finished product.Mixture gradation scope in the AC-16 type continuous type dense bitumen mixing bed of material is: be 100% by the quality percentage of 19mm sieve aperture, be 95%～100% by the quality percentage of 16mm sieve aperture, be 75%～90% by the quality percentage of 13.2mm sieve aperture, be 58%～72% by the quality percentage of 9.5mm sieve aperture, be 35%～45% by the quality percentage of 4.75mm sieve aperture, be 23～32% by the quality percentage of 2.36mm sieve aperture, be 15%～24% by the quality percentage of 1.18mm sieve aperture, be 12%～20% by the quality percentage of 0.6mm sieve aperture, be 8%～15% by the quality percentage of 0.3mm sieve aperture, be 6%～10% by the quality percentage of 0.15mm sieve aperture, be 4%～7% by the quality percentage of 0.075mm sieve aperture.
SBR modified emulsifying asphalt tack coat 2 is SBR modified emulsifying asphalt, uses pitch sprinkling car to spray, and spread quantity is 0.3kg/m
2～0.5kg/m
2.
Under ATB-25 type Asphalt Stabilized Macadam, to adopt thickness be the ATB-25 Asphalt Stabilized Macadam layer of 8cm to surface layer 3, by pitch, coarse aggregate, fine aggregate and breeze composition, the grading limit of the compound in Asphalt Stabilized Macadam layer is: be 100% by the quality percentage of 31.5mm sieve aperture, be 92%～100% by the quality percentage of 26.5mm sieve aperture, be 67%～80% by the quality percentage of 19mm sieve aperture, be 58%～68% by the quality percentage of 16mm sieve aperture, be 52%～61% by the quality percentage of 13.2mm sieve aperture, be 40%～50% by the quality percentage of 9.5mm sieve aperture, be 25%～33% by the quality percentage of 4.75mm sieve aperture, be 15～23% by the quality percentage of 2.36mm sieve aperture, be 10%～16% by the quality percentage of 1.18mm sieve aperture, be 7%～13% by the quality percentage of 0.6mm sieve aperture, be 5%～9% by the quality percentage of 0.3mm sieve aperture, be 4%～8% by the quality percentage of 0.15mm sieve aperture, be 4%～7% by the quality percentage of 0.075mm sieve aperture.
It is the rubber asphalt synchronous breakstone layer of 1.5cm left and right that rubber asphalt synchronous surface dressing 4 adopts thickness, formed by rubber powder, matrix pitch and rubble, wherein rubber powder is selected the bias tire rubber powder that 20 order～40 order normal temperature grind, matrix pitch is No. A-90 or A-70 bi tumenf orr oad, rubber powder volume is 18%～25% of matrix pitch quality, rubber asphalt is directly processing at the construction field (site), and rubble is that 9.5mm～16mm gathers materials.Specific embodiments is: adopt synchronous macadam seal paver to spill (spreading) cloth, rubber asphalt spread quantity is 1.6kg/m
2～2.2kg/m
2, rubble spreading amount is 8kg/m
2～10kg/m
2; Adopt rubber-tyred roller to roll immediately following synchronous macadam seal paver, roll and should before cementitious matter turns cold or be too sticky, complete; After roller-compaction, remove in time surperficial float stone.
High infiltration emulsified asphalt thoroughly layer 5 is high infiltration emulsified asphalt, uses pitch sprinkling car to spray, and spread quantity is 0.8kg/m
2～1.2kg/m
2.
The old cement concrete pavement regeneration zone 6 of resonant rubbilizing is the old cement concrete pavement surface after fragmentation, and top is the loose rubble permeable structure of 3cm～8cm, and bottom is the fine and close closed construction of 8cm～18cm interlocking fragment.Specific embodiments is: clear up old cement concrete pavement pitch patching material; Adopt the capable fragmentation of resonance crusher, work tup contacts with road surface, tup width is 25mm～35mm, the sensor of work on tup by the vibrational feedback on road surface to computer, automatically regulate vibration frequency by computer, make cement panel under tup, in subrange, produce resonance, old cement concrete slab is cracked, form the loose macadam in top, the block stone layer of bottom interlocking densification.Artificial remove that old Portland Cement Concrete Surface Course on rubblization layer connects, strip filler between crack and be greater than the fragment of 10cm; Watering starts to roll while reaching optimum moisture content, adopts respectively steel-wheeled vibrated roller, rubber-tyred roller, steel-wheeled vibrated roller to carry out first pressing, multiple pressure, final pressure.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every any simple modification of above embodiment being done according to the technical solution of the utility model, increase and decrease thickness or change grading limit, all belong to the protection domain of the application's technical scheme.
Claims (6)
1. an old cement concrete pavement regeneration overlays asphalt pavement structure, it is characterized in that, above old cement concrete pavement basic unit, be equipped with successively from top to down surface layer under AC-16 type continuous type dense bitumen compound upper layer, SBR modified emulsifying asphalt tack coat, ATB-25 type Asphalt Stabilized Macadam, rubber asphalt synchronous surface dressing, high infiltration emulsified asphalt layer, the old cement concrete pavement regeneration zone of resonant rubbilizing thoroughly.
2. old cement concrete pavement regeneration as claimed in claim 1 overlays asphalt pavement structure, it is characterized in that, the thickness of described AC-16 type continuous type dense bitumen compound upper layer is 5cm; Under described ATB-25 type Asphalt Stabilized Macadam, the thickness of surface layer is 8cm; The thickness of described SBR modified emulsifying asphalt tack coat is 0.05cm; The rubber asphalt synchronous surface dressing that the thickness of described rubber asphalt synchronous surface dressing is 1cm～2cm; The described high infiltration emulsified asphalt thoroughly thickness of layer is 0.05cm.
3. old cement concrete pavement regeneration as claimed in claim 1 overlays asphalt pavement structure, it is characterized in that, in described SBR modified emulsifying asphalt tack coat, the spread quantity of SBR modified emulsifying asphalt is 0.3kg/m
2～0.5kg/m
2.
4. old cement concrete pavement regeneration as claimed in claim 1 overlays asphalt pavement structure, it is characterized in that, the spread quantity of the mulseal in the saturating layer of described high infiltration emulsified asphalt is 0.8kg/m
2～1.2kg/m
2.
5. old cement concrete pavement regeneration as claimed in claim 1 overlays asphalt pavement structure, it is characterized in that, in described rubber asphalt synchronous surface dressing, the spread quantity of rubber powder is 1.6kg/m
2～2.2kg/m
2; Rubble spreading amount is 8kg/m
2～10kg/m
2.
6. old cement concrete pavement regeneration as claimed in claim 1 overlays asphalt pavement structure, it is characterized in that, the old cement concrete pavement regeneration zone of described resonant rubbilizing comprises loose rubble permeable structure layer and the thick fine and close closed construction layer of interlocking fragment of 8cm～18cm that 3cm～8cm is thick, and the fine and close closed construction layer of interlocking fragment is positioned at the below of loose rubble permeable structure layer.
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|---|---|---|---|
| CN201420326599.3U CN204000527U (en) | 2014-06-18 | 2014-06-18 | A kind of old cement concrete pavement regeneration overlays road structure |
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|---|---|---|---|
| CN201420326599.3U CN204000527U (en) | 2014-06-18 | 2014-06-18 | A kind of old cement concrete pavement regeneration overlays road structure |
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| CN204000527U true CN204000527U (en) | 2014-12-10 |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652217A (en) * | 2015-02-02 | 2015-05-27 | 成军 | Modified emulsified asphalt fiber synchronous pavement surface dressing construction method |
| CN105178132A (en) * | 2015-07-27 | 2015-12-23 | 福州市规划设计研究院 | Method and structure for achieving rigid-soft overlapping joint before pavement paving |
| CN105350420A (en) * | 2015-10-10 | 2016-02-24 | 重庆建工住宅建设有限公司 | Novel crack-resistant waterproof under-sealed layer |
| CN108221539A (en) * | 2018-01-19 | 2018-06-29 | 王邦国 | A kind of asphalt pavement structure, resonant rubbilizing composite base and its manufacturing method |
| CN110284390A (en) * | 2019-07-10 | 2019-09-27 | 南京城建隧桥经营管理有限责任公司 | A kind of asphalt pavement structure and its method for paving for city tunnel deformation joint |
| CN111005285A (en) * | 2020-01-07 | 2020-04-14 | 吉磊光 | White-to-black pavement structure and white-to-black pavement construction method |
| WO2020199781A1 (en) * | 2019-04-04 | 2020-10-08 | 佛山市交通科技有限公司 | Method for paving combined base course asphalt road surface |
| CN111893827A (en) * | 2020-08-05 | 2020-11-06 | 中交上海航道局有限公司 | Construction process of urban trunk road |
| CN111996876A (en) * | 2020-08-26 | 2020-11-27 | 陕西路桥集团有限公司 | Construction process for changing cement concrete pavement into asphalt pavement |
| CN112681047A (en) * | 2020-09-17 | 2021-04-20 | 湖北楚交科交通科技股份有限公司 | Flexible homogenization treatment technology for changing white into black base layer |
| CN113250029A (en) * | 2021-06-09 | 2021-08-13 | 安徽省新路建设工程集团有限责任公司 | Method for reconstructing road base based on old cement concrete road rubblization |
| CN113279303A (en) * | 2021-05-21 | 2021-08-20 | 甘肃能源化工职业学院 | Road surface repair mortar layer structure containing slag |
| CN115110371A (en) * | 2022-06-02 | 2022-09-27 | 广东冠粤路桥有限公司 | Construction method of asphalt composite pavement of highway tunnel |
| CN115142315A (en) * | 2021-03-30 | 2022-10-04 | 苏州凌云建设有限公司 | Concrete road repairing construction method |
| CN116145491A (en) * | 2023-03-29 | 2023-05-23 | 杭州航弘建设科技有限公司 | Asphalt paving structure for urban road flat intersection old concrete pavement and construction method thereof |
-
2014
- 2014-06-18 CN CN201420326599.3U patent/CN204000527U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652217A (en) * | 2015-02-02 | 2015-05-27 | 成军 | Modified emulsified asphalt fiber synchronous pavement surface dressing construction method |
| CN105178132A (en) * | 2015-07-27 | 2015-12-23 | 福州市规划设计研究院 | Method and structure for achieving rigid-soft overlapping joint before pavement paving |
| CN105350420A (en) * | 2015-10-10 | 2016-02-24 | 重庆建工住宅建设有限公司 | Novel crack-resistant waterproof under-sealed layer |
| CN108221539A (en) * | 2018-01-19 | 2018-06-29 | 王邦国 | A kind of asphalt pavement structure, resonant rubbilizing composite base and its manufacturing method |
| WO2020199781A1 (en) * | 2019-04-04 | 2020-10-08 | 佛山市交通科技有限公司 | Method for paving combined base course asphalt road surface |
| CN110284390A (en) * | 2019-07-10 | 2019-09-27 | 南京城建隧桥经营管理有限责任公司 | A kind of asphalt pavement structure and its method for paving for city tunnel deformation joint |
| CN111005285A (en) * | 2020-01-07 | 2020-04-14 | 吉磊光 | White-to-black pavement structure and white-to-black pavement construction method |
| CN111893827A (en) * | 2020-08-05 | 2020-11-06 | 中交上海航道局有限公司 | Construction process of urban trunk road |
| CN111996876A (en) * | 2020-08-26 | 2020-11-27 | 陕西路桥集团有限公司 | Construction process for changing cement concrete pavement into asphalt pavement |
| CN112681047A (en) * | 2020-09-17 | 2021-04-20 | 湖北楚交科交通科技股份有限公司 | Flexible homogenization treatment technology for changing white into black base layer |
| CN115142315A (en) * | 2021-03-30 | 2022-10-04 | 苏州凌云建设有限公司 | Concrete road repairing construction method |
| CN113279303A (en) * | 2021-05-21 | 2021-08-20 | 甘肃能源化工职业学院 | Road surface repair mortar layer structure containing slag |
| CN113250029A (en) * | 2021-06-09 | 2021-08-13 | 安徽省新路建设工程集团有限责任公司 | Method for reconstructing road base based on old cement concrete road rubblization |
| CN115110371A (en) * | 2022-06-02 | 2022-09-27 | 广东冠粤路桥有限公司 | Construction method of asphalt composite pavement of highway tunnel |
| CN115110371B (en) * | 2022-06-02 | 2023-11-24 | 广东冠粤路桥有限公司 | Construction method of highway tunnel asphalt composite pavement |
| CN116145491A (en) * | 2023-03-29 | 2023-05-23 | 杭州航弘建设科技有限公司 | Asphalt paving structure for urban road flat intersection old concrete pavement and construction method thereof |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20160618 |