CN105755922A - Asphalt pavement and construction method thereof - Google Patents
Asphalt pavement and construction method thereof Download PDFInfo
- Publication number
- CN105755922A CN105755922A CN201610211627.0A CN201610211627A CN105755922A CN 105755922 A CN105755922 A CN 105755922A CN 201610211627 A CN201610211627 A CN 201610211627A CN 105755922 A CN105755922 A CN 105755922A
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- China
- Prior art keywords
- polypropylene material
- layer
- bituminous paving
- semi
- material structure
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
- E01C7/262—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre with fibrous material, e.g. asbestos; with animal or vegetal admixtures, e.g. leather, cork
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
Abstract
The patent belongs to the technical field of construction or paving of roads, stadiums or similar projects and discloses an asphalt pavement and a construction method thereof. The asphalt pavement comprises a semi-grid base layer, a synchronous crushed stone sealing layer and an asphalt concrete surface layer from bottom to top in sequence, wherein the asphalt concrete surface layer is divided into a lower surface layer, a middle surface layer and an upper surface layer in sequence from bottom to top; and a polypropylene material structural layer is arranged between the lower surface layer and the middle surface layer. The asphalt pavement disclosed by the invention has the characteristics that surface cracks and reflection cracks can be prevented from extending and expanding and from being communicated and rainwater can be prevented from seeping into the semi-grid base layer.
Description
Technical field
The invention belongs to building or its paving technical field of road, stadium or similar engineering.
Background technology
The existing asphalt pavement structure in Tibet region is semi-rigid structure, this semi-rigid structure includes semi-rigid type base (i.e. roadbed hereafter), synchronous surface dressing, asphalt concrete pavement from the bottom to top successively, this semi-rigid structure has the advantages that plate body is strong, bearing capacity is high, substantially disclosure satisfy that the demand that current traffic loading and traffic increase.
But Semi-Rigid Pavement Structure has also the drawback that: when 1, being laid on High aititude/extremely frigid zones, it is easily generated reflection crack: produce the temperature and humidity that principle is High aititude/extremely frigid zones (such as Tibet) and change greatly, semi-rigid type base is easily generated temperature contracting or desciccation crack, and under the repeated action of traffic loading, the contracting of this temperature or desciccation crack can extend upwardly to asphalt concrete pavement from semi-rigid type base, namely form reflection crack.2, when being laid on High aititude/extremely frigid zones, it is easily generated surface crack: principle is that High aititude/extremely frigid zones is in low temperature throughout the year, day and night the temperature difference is big, when temperature rapid drawdown repeatedly causes the tensile strength that the temperature stress produced in constrained bitumen layer exceedes bituminous concrete, asphalt concrete pavement is caused to ftracture, i.e. surface crack, can downwardly extend when surface crack is serious and extend to semi-rigid type base, so can cause: 1. destroy globality and the seriality of asphalt pavement structure, rainwater or surface gathered water etc. can penetrate into semi-rigid type base by surface crack from asphalt concrete pavement, etch roadbed, cause that road surface bearing capacity reduces, provide condition for freeze thawing simultaneously；2. rainwater is stagnant between asphalt concrete pavement and semi-rigid type base, very big flowing pressure is produced under traffic load high velocity effect, and then wash away semi-rigid type base, make asphalt concrete pavement lose the support of semi-rigid type base, cause asphalt concrete pavement extensive damage.
From entirety, the disadvantage mentioned above of Semi-Rigid Pavement Structure also can influence each other and cause bigger road surface to endanger: reflection crack road pavement can cause road surface Paraclase after connecting with surface crack, under the effect of the not strong situation of shearing strength at intersection power and car load, ruptured completely in road surface, and rainwater is by oozing under the Paraclase of road surface so that roadbed softens.
Summary of the invention
The invention is intended to provide one to prevent surface crack and reflection crack from extending extension, prevent surface crack from connecting with reflection crack, it is to avoid rainwater penetrates into the bituminous paving of semi-rigid type base simultaneously.
One bituminous paving of the present invention, it includes semi-rigid type base, synchronous surface dressing, asphalt concrete pavement from the bottom to top successively, this asphalt concrete pavement is divided into cutting optimal, middle surface layer and upper layer from the bottom to top, also includes the polypropylene material structure sheaf being located below between layer and middle surface layer.
Beneficial effect: 1. polypropylene material structure sheaf heat conductivity is low, when High aititude/extremely frigid zones, road surface outside heat transmission is hampered by polypropylene material, semi-rigid type base is played thermal insulation function, reduce the thermal (temperature difference) stress of semi-rigid type base, suppress the generation of warm plastic forming, reduce reflection crack occurrence probability；Even if 2. semi-rigid type base has produced temperature contracting or desciccation crack, the obstruct of polypropylene material structure sheaf can be subject to when upwards reflecting extension, prevent reflection crack from extending to middle surface layer and the upper layer of asphalt concrete pavement, concrete principle is: temperature contracting or desciccation crack place stress are concentrated, and polypropylene material has, and pliability is good, intensity height deflection is big, polypropylene material structure sheaf can absorb the stress at crack place, thus reaching iris action；3. polypropylene material structure sheaf is positioned at asphalt concrete pavement, can by pitch impregnation when construction, formed and seal waterproof layer, on the one hand, the impermeability that sealing waterproof layer compares the polypropylene material structure sheaf before soaking into is higher, also higher than the impermeability of bituminous concrete, when occurring that surface crack occurs in asphalt concrete pavement, sealing waterproof layer can intercept in the pavement structure (including cutting optimal, synchronous surface dressing, semi-rigid type base) that rainwater enters below polypropylene material structure sheaf effectively；On the other hand, polypropylene material structure can make the hot strength of asphalt concrete pavement and modulus increase, and reduces surface crack and prevents surface crack from extending；4. polypropylene material structure sheaf has bigger extension energy, namely serve the effect of absorption portion tensile energy, it is possible to undertake part of horizontal stress, add asphalt pavement structure bearing capacity, and between surface crack and reflection crack, it is possible to prevent surface crack from connecting with reflection crack.
Further, thickness≤the 0.2cm of described polypropylene material structure sheaf, it is similar to gluing layer effect, can by bituminous concrete, upper layer and the Sub-course Asphalt Concrete closely bond, as blocked up in polypropylene material structure but (> 0.2cm), polypropylene material structure sheaf can become the weak intercalated layer between bituminous concrete, middle cutting optimal, under car load action, causes road surface breaks down.
Further, the temperature of described heated bitumen sticking layer oil is 145～150 DEG C, at high temperature can improve the permeability of Colophonium；Spreading amount is 1.0～1.2kg/m2, comparatively suitable, it is possible to prevent too much free asphalt from forming weak intercalated layer, it is ensured that the adhesion strength of cutting optimal and polypropylene material structure sheaf.
Further, described polypropylene material structure sheaf is bonding by heated bitumen sticking layer oil with cutting optimal, compared to emulsified asphalt, coheres dynamics higher.
Further, the asphalt content of described synchronous surface dressing is 1.2kg/m2～1.4kg/m2, stone sizes is 5～10mm, and rubble is paving rate completely: 60～70%, the effect of synchronous surface dressing: one is close semi-rigid type base, plays water conservation waterproof action；Two is form transition and effective connection between roadbed and asphalt surface course.
Further, described semi-rigid type base (i.e. roadbed) is cement stabilized macadam base, becomes the transition zone between road surface and soil matrix, forms an organism.
Further, the mass area ratio of described polypropylene material structure sheaf is 120～160g/m2, tensile strength >=10KN/m, longitudinal and transverse extreme extension rate is 40～80%, CBR bursting strength >=2KN, punctures intensity >=400N, Colophonium immersion oil amount >=1.2kg/m2, there is stronger deformability, stress absorption effect is better.
The form of construction work of a kind of bituminous paving, comprises the steps:
1. semi-rigid type base cleans, it is ensured that substrate surface cleaning is dry, smooth closely knit；
2. at semi-rigid type base surface sprinkling emulsification pitch penetration oil, 24h after sprinkling, is stood；
3. synchronous surface dressing is dispensed；
4. asphalt concrete forms cutting optimal；
5. dispensing heated bitumen sticking layer oil, during spreading, the temperature of heated bitumen is 145～150 DEG C, and spreading amount is 1.0～1.2kg/m2, heated bitumen sticking layer oil dispenses width wider than laying width 5cm；
6., when heated bitumen sticking layer oil temperature >=120 DEG C, polypropylene material structure sheaf is laid on heated bitumen sticking layer oil surface；
7. adopt 25t pneumatic-tired rollers evenly by polypropylene material structure sheaf grinding compacting；
8. quality examination and defect processing；
9. surface layer in asphalt concrete；
10. asphalt concrete upper layer.
Beneficial effect: the temperature of heated bitumen sticking layer oil is 145～150 DEG C, at high temperature can improve the permeability of Colophonium, carry out during heated bitumen sticking layer oil temperature >=120 DEG C laying polypropylene material, avoid that heated bitumen heated bitumen sticking layer oil temperature is too high causes polypropylene material generation thermal deformation and then curling, heated bitumen heated bitumen sticking layer oil temperature can also be avoided to solidify time too low, lose bonding effect；Spreading amount is 1.0～1.2kg/m2, comparatively suitable, it is possible to prevent too much free asphalt from forming weak intercalated layer, it is ensured that the adhesion strength of cutting optimal and polypropylene material structure sheaf；Heated bitumen sticking layer oil dispenses width wider than laying width 5cm, it is ensured that polypropylene material structure sheaf and heated bitumen sticking layer oil are fully contacted, it is to avoid not bonding dead angle etc. occur.
Further, the thickness of described semi-rigid type base is 32cm；The thickness of asphalt concrete pavement is 17.2cm, and wherein cutting optimal thickness to be 7cm, middle surface thickness be 6cm, upper layer thickness are 4cm.Polypropylene material Laminate construction thickness is 0.2cm, it is similar to gluing layer effect, can by bituminous concrete, upper layer and the Sub-course Asphalt Concrete closely bond, as blocked up in polypropylene material structure but (> 0.2cm), polypropylene material structure sheaf can become the weak intercalated layer in bituminous concrete, between cutting optimal, under car load action, cause road surface breaks down.
Further, the mass area ratio of described polypropylene material structure sheaf is 120～160g/m2, tensile strength >=10KN/m, longitudinal and transverse extreme extension rate is 40～80%, CBR bursting strength >=2KN, punctures intensity >=400N, Colophonium immersion oil amount >=1.2kg/m2, there is stronger deformability, stress absorption effect is better.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of bituminous paving of the embodiment of the present invention.
Detailed description of the invention
Below by detailed description of the invention, the present invention is further detailed explanation:
Cement stabilized macadam base 1；Synchronous surface dressing 2；The Sub-course Asphalt Concrete 3；Polypropylene nonwoven 4；Surface layer 5 in bituminous concrete；Bituminous concrete upper layer 6.
Embodiment
A kind of bituminous paving, it is arranged at soil matrix end face, it includes the cement stabilized macadam base 1 of 32cm from the bottom to top successively, the Sub-course Asphalt Concrete 3 of synchronous surface dressing 2,7cm, the polypropylene nonwoven 4 of 0.2cm, 6cm bituminous concrete in surface layer 5,4cm bituminous concrete upper layer.The mass area ratio of described polypropylene nonwoven 4 is 120～160g/m2, tensile strength >=10KN/m, longitudinal and transverse extreme extension rate is 40～80%, CBR bursting strength >=2KN, punctures intensity >=400N, Colophonium immersion oil amount >=1.2kg/m2。
The construction procedure of above-mentioned a kind of bituminous paving is as follows:
1. cement stabilized macadam base 1 is cleaned, it is ensured that this substrate surface cleaning is dry, smooth closely knit；
2. at the surface sprinkling emulsification pitch penetration oil of cement stabilized macadam base 1,24h after sprinkling, is stood；
3. dispensing synchronous surface dressing 2 on emulsification pitch penetration oil, the asphalt content of synchronous surface dressing 2 is 1.4kg/m2, stone sizes is 5～10mm, and rubble is paving rate completely: 60～70%.；
4. asphalt concrete forms the Sub-course Asphalt Concrete 3；
5. dispensing heated bitumen sticking layer oil, during spreading, the temperature of heated bitumen is 150 DEG C, and spreading amount is 1.2kg/m2, heated bitumen sticking layer oil dispenses width wider than laying width 5cm；
6. when heated bitumen sticking layer oil temperature >=120 DEG C, polypropylene nonwoven 4 is laid on heated bitumen sticking layer oil surface, emulsification pitch penetration oil, it is ensured that Colophonium has good permeability and an adhering effect, principle of paving " dispense even, line style is straight, stress is tight, mat formation flat "；
7. adopt 25t pneumatic-tired rollers evenly by polypropylene nonwoven 4 grinding compacting；
8. quality examination and defect processing: check lap splice position, seam crossing, hardened verge and in point belt edge, cut out fold, eliminate overlap；
9. surface layer 5 in asphalt concrete；
10. asphalt concrete upper layer 6.
Experimental test
1, test prepares:
Test specimen one: utilize road surface corning machine to take out the present embodiment (i.e. a kind of bituminous paving) and be of a size of the test specimen of 10mm*10mm；
Test specimen two: be different in that with test specimen one, polypropylene nonwoven 4 is layered on semi-rigid type base end face.
Test specimen three: be different in that with test specimen one, does not lay polypropylene nonwoven 4.
2, pilot project and result of the test such as following table:
As seen from the experiment: " test specimen one " shows in disposable loading Ultimate Strength Test, MTS fatigue life test, cracking strain-gauge test, infiltration coefficient experiment and be superior to " test specimen two " and " test specimen three ", and its waterproof anticracking ability is higher.
Note: what infiltration coefficient measured is slightly ftracture state in road surface, and infiltration coefficient is more big, and the water-resisting property on road surface is more poor.
Above-described is only embodiments of the invention, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this.Should be understood that; for a person skilled in the art, under the premise without departing from present configuration, it is also possible to make some deformation and improvement; these also should be considered as protection scope of the present invention, and these are all without affecting effect of the invention process and practical applicability.The protection domain that this application claims should be as the criterion with the content of its claim, and the detailed description of the invention in description etc. records the content that may be used for explaining claim.
Claims (10)
1. a bituminous paving, include semi-rigid type base, synchronous surface dressing, asphalt concrete pavement from the bottom to top successively, this asphalt concrete pavement is divided into cutting optimal, middle surface layer and upper layer from the bottom to top, it is characterized in that, also include the polypropylene material structure sheaf being located below between layer and middle surface layer.
2. a kind of bituminous paving according to claim 1, it is characterised in that: the thickness≤0.2cm of described polypropylene material structure sheaf.
3. a kind of bituminous paving according to claim 2, it is characterised in that: the temperature of described heated bitumen sticking layer oil is 145～150 DEG C, spreading amount is 1.0～1.2kg/m2。
4. a kind of bituminous paving according to claim 3, it is characterised in that: described polypropylene material structure sheaf is bonding by heated bitumen sticking layer oil with cutting optimal.
5. a kind of bituminous paving according to claim 4, it is characterised in that: the asphalt content of described synchronous surface dressing is 1.2kg/m2～1.4kg/m2, stone sizes is 5～10mm, and rubble completely paving rate is 60～70%.
6. a kind of bituminous paving according to claim 5, it is characterised in that: described semi-rigid type base is cement stabilized macadam base.
7. a kind of bituminous paving according to claim 6, it is characterised in that: the mass area ratio of described polypropylene material structure sheaf is 120～160g/m2, tensile strength >=10KN/m2, longitudinal and transverse extreme extension rate is 40～80%, CBR bursting strength >=2KN, punctures intensity >=400N, Colophonium immersion oil amount 1.2kg/m2。
8. a form of construction work for bituminous paving, comprises the steps:
1. semi-rigid type base cleans, it is ensured that substrate surface cleaning is dry, smooth closely knit；
2. at semi-rigid type base surface sprinkling emulsification pitch penetration oil, 24h after sprinkling, is stood；
3. synchronous surface dressing is dispensed；
4. asphalt concrete forms cutting optimal；
5. dispensing heated bitumen sticking layer oil, during spreading, the temperature of heated bitumen is 145～150 DEG C, and spreading amount is 1.0～1.2kg/m2, heated bitumen sticking layer oil dispenses width wider than laying width 5cm；
6., when heated bitumen sticking layer oil temperature >=120 DEG C, polypropylene material structure sheaf is laid on heated bitumen sticking layer oil surface；
7. adopt 25t pneumatic-tired rollers evenly by polypropylene material structure sheaf grinding compacting；
8. quality examination and defect processing；
9. surface layer in asphalt concrete；
10. asphalt concrete upper layer.
9. the form of construction work of a kind of bituminous paving according to claim 8, it is characterised in that: the thickness of described semi-rigid type base is 32cm；The thickness of asphalt concrete pavement is 17.2cm, and wherein cutting optimal thickness to be 7cm, middle surface thickness be 6cm, upper layer thickness are 4cm, polypropylene material Laminate construction thickness is 0.2cm.
10. the form of construction work of a kind of bituminous paving according to claim 9, it is characterised in that: the mass area ratio of described polypropylene material structure sheaf is 120～160g/m2, tensile strength >=10KN/m, longitudinal and transverse extreme extension rate is 40～80%, CBR bursting strength >=2KN, punctures intensity >=400N, Colophonium immersion oil amount >=1.2kg/m2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610211627.0A CN105755922A (en) | 2016-04-07 | 2016-04-07 | Asphalt pavement and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610211627.0A CN105755922A (en) | 2016-04-07 | 2016-04-07 | Asphalt pavement and construction method thereof |
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| CN105755922A true CN105755922A (en) | 2016-07-13 |
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| CN201610211627.0A Pending CN105755922A (en) | 2016-04-07 | 2016-04-07 | Asphalt pavement and construction method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106868968A (en) * | 2017-03-30 | 2017-06-20 | 中核恒通（昆明）基础设施开发有限公司 | A kind of non-flexible foundation bituminous paving entirety thick plate structure construction method |
| CN109870557A (en) * | 2017-12-05 | 2019-06-11 | 南京林业大学 | A kind of test method of determining crushed stone sealing maximum asphalt content |
| CN110644322A (en) * | 2019-10-16 | 2020-01-03 | 四川齐峰建设工程有限公司 | Municipal road construction method |
| CN112779834A (en) * | 2020-12-31 | 2021-05-11 | 中交第三航务工程局有限公司江苏分公司 | Resonance rubblizing process for old cement concrete pavement |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106868968A (en) * | 2017-03-30 | 2017-06-20 | 中核恒通（昆明）基础设施开发有限公司 | A kind of non-flexible foundation bituminous paving entirety thick plate structure construction method |
| CN106868968B (en) * | 2017-03-30 | 2019-07-23 | 中核腾辉(昆明)基础设施开发有限公司 | A kind of non-flexible foundation bituminous pavement entirety thick plate structure construction method |
| CN109870557A (en) * | 2017-12-05 | 2019-06-11 | 南京林业大学 | A kind of test method of determining crushed stone sealing maximum asphalt content |
| CN109870557B (en) * | 2017-12-05 | 2021-08-06 | 南京林业大学 | Test method for determining maximum asphalt consumption of gravel seal |
| CN110644322A (en) * | 2019-10-16 | 2020-01-03 | 四川齐峰建设工程有限公司 | Municipal road construction method |
| CN112779834A (en) * | 2020-12-31 | 2021-05-11 | 中交第三航务工程局有限公司江苏分公司 | Resonance rubblizing process for old cement concrete pavement |
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Application publication date: 20160713 |
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