CN205917559U - Anti type road surface structure of splitting suitable for semi rigid base course - Google Patents
Anti type road surface structure of splitting suitable for semi rigid base course Download PDFInfo
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- CN205917559U CN205917559U CN201620684497.8U CN201620684497U CN205917559U CN 205917559 U CN205917559 U CN 205917559U CN 201620684497 U CN201620684497 U CN 201620684497U CN 205917559 U CN205917559 U CN 205917559U
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Abstract
The utility model discloses an anti type road surface structure of splitting suitable for semi rigid base course, macadam subbase, cement thin paste tie coat, glass fiber cement stabilized macadam base, rubber asphalt stress absorption layer and bituminous mixture surface course are stabilized to low dosage cement including laying on the road bed from bottom to top. The bituminous mixture surface course includes among surface course under the coarse -grain bituminous mixture, the regenerated fiber mediumgrain formula bituminous mixture that surface course and fine -grain bituminous mixture go up the surface course. The combination of this road surface through each functional layer, advantage that can each structural layer of full play road surface delays the fissured production of semi rigid base course and prevents that the crack from reflecting to asphalt pavement, reduces the degree that the road surface received the damage by water evil. Through mixing glass fiber, improved cement and stabilized compressive strength and the bending resistance of rubble and draw intensity, improved that the anti temperature of cement stabilized macadam base contracts, ways such as air shrinkage and freexing tolerance use the performance. Simultaneously, glass fiber compares the mekralon who uses in the mechanism of prior art road surface, with low costs.
Description
Technical field
This utility model belongs to highways and urban roads field of engineering technology, is applied to semi-rigid base more particularly to one kind
The crack resistance type pavement structure of layer.
Background technology
Since the nineties in 20th century Large scale construction highway so far, the design concept of " strong basis, sake, steady soil matrix " is just
It is applied to always among the design of asphalt pavement structure.Semi-rigid asphalt pavement is main as highway in China and urban road
Road surface types, have the advantages that pavement strength is high, bearing capacity is strong, good stability, bitumen layer are thin, low engineering cost.Enter 21 generation
Since discipline, cement stabilized macadam, as a kind of semi-rigid sub-base material, is promoted on a large scale, but cement stabilized macadam base material
Material is susceptible to temperature contracting, desciccation crack, and going to the bottom in load action, gradually insertion bitumen layer forms reflection crack to slabbing seam, and moisture enters
Accelerate pavement destruction process after entering road surface, reduce service life of road surface, increased maintenance in service life for the road time
Number and life cycle cost.Therefore, building perpetual pavement basic unit as target, provide and a kind of be applied to the resistance to of semi-rigid type base
Property pavement structure, is problem demanding prompt solution long.
The cracking resistance of semi-rigid asphalt pavement can not ignore the impact of each structure sheaf.In recent years, in order to improve half just
Property pavement structure service life, prevent the generation of road disease especially early disease, reduce LCC, domestic carry
Gone out increase rubber asphalt stress absorbing layer, asphalt macadam transition zone and in cement stabilized macadam admixture polypropylene fibre etc. set
Meter construction, achieves certain effect, but there is also the problems such as structure sheaf construction complexity, high expensive.
Content of the invention
The purpose of this utility model is to provide a kind of crack resistance type pavement structure being applied to semi-rigid type base, solves existing
The contracting of road surface temperature resistance, desciccation crack poor performance, and the short technical problem of service life in technology.
In order to solve above-mentioned technical problem, this utility model adopts the following technical scheme that
A kind of crack resistance type pavement structure being applied to semi-rigid type base, including the low dosage being layed in from bottom to top on roadbed
Cement stabilized macadam underlayment, cement slurry tack coat, fibre cement stabilized macadam base, rubber asphalt stress absorbing layer and drip
Blue or green mixture surface course.
Described low content cement stabilized gravel underlayment thickness is 16～20cm, and cement quality fraction is 2.0～3.5%.
The mechanical property of low content cement stabilized gravel underlayment is close with graded broken stone, can avoid or reduce due to cement stabilized type
The crack that Material shrinkage produces, thus eliminate or reduce the reflection crack of bituminous paving.Mix cement and can significantly improve rubble
The cbr value of material, has higher bearing capacity, can reduce some diseases of granular base course bituminous paving to a certain extent,
As structural rut, fatigue crack etc..Low content cement stabilized gravel has preferable water stability, crack resistance and scour resistance
The advantages of energy.
Cement pressed by the cement mortar of described cement slurry tack coat: water is the proportions of 1.0:1.5～2.5, equal with spread
Do not trickle for control standard in even, surface；Effectively improve low content cement stabilized gravel bottom by arranging cement slurry tack coat
Contact conditions between basic unit and fibre cement stabilized macadam base.
Described fibre cement stabilized macadam base thickness is 32～36cm, the fibre adding in fibre cement stabilized macadam base
Tie up as glass fibre.In order to ensure the intensity of cement stabilized macadam base, the cement consumption of Cement Stabilized Crushed Stone Mixture
General all higher, but higher cement consumption makes cement stabilized macadam base cracking resistance poor, easily causes asphalt surface course to go out
Now excessive reflection crack.By arranging fibre cement stabilized macadam base, the incorporation of glass fibre suitably reduces cement and uses
Amount；Increase with age, cement makes the later stage of glass fiber cement stabilization gravel to the bonding of glass fibre and consolidation
Comprcssive strength improves a lot；Meanwhile, the glass fibre of random distribution forms parcel and effect of contraction to particles of aggregates, constrains
The development of crack tip, reduces the drying shrinkage strain of cement stabilized macadam, warm shrinkage strain, improves bending tensile strength, drying shrinkage cracking resistance system
Number and warm contracting tear factor, extend Road Service Life；After the completion of basic unit's making, the evaporation of moisture in compound causes drying
Shrink, so as to dehydration area reduces, water translocation is difficult for the presence of glass fibre, when basic unit does not form sufficient intensity, reduces
The generation of early crack.Meanwhile, glass fibre polypropylene fibre used in the mechanism of road surface compared to existing technology, low cost.
The rubber asphalt spreading amount of described rubber asphalt stress absorbing layer is 2.4～2.6kg/m2, rubble spread quantity is 12
～14kg/m2.Rubber asphalt stress absorbing layer can effectively alleviate the stress concentration phenomenon of asphaltic road-mix surface course bottom, prevents rain
The downward infiltration of water, plays a protective role to basic unit.
Improve further, described asphaltic road-mix surface course includes coarse grain formula asphalt cutting optimal, grain in regenerated fiber
Surface layer and particulate formula asphalt upper layer in formula asphalt.Wherein, below described coarse grain formula asphalt layer by layer
Thickness is 6～8cm, and in grain formula asphalt in regenerated fiber, surface thickness is 6～8cm, above particulate formula asphalt
Thickness is 4cm layer by layer.In surface layer in grain formula asphalt in described regenerated fiber regenerated fiber volume be 0.2%～
0.25%.The high-temperature stability of surface layer, low temperature in middle grain formula asphalt can be significantly increased by increasing Regenerated Polyester Fibres
Crack resistance and anti-fatigue performance.
Compared with prior art, this utility model has the advantages that
1st, pass through to mix glass fibre, improve comprcssive strength and the bending tensile strength of cement stabilized macadam, improve water
The pavement performances such as the temperature resistance contracting of cement-stabilizing broken stone basic unit, drying shrinkage and freexing tolerance, meanwhile, glass fibre road surface mechanism compared to existing technology
Used in polypropylene fibre, low cost.
2nd, regenerated fiber can significantly increase stability at high temperature of asphalt mixture, low-temperature cracking-resistance and anti-fatigue performance.
3rd, by the combination of each functional layer, the advantage of semi-rigid type base can be given full play to, delay semi-rigid type base to split
Producing and preventing crack from reflecting to asphalt surface course of seam, reduces the injured degree in road surface, solves prior art Road face easy
Technical problem damaged, that service life is short.Do not allow to be also easy to produce crack and Moisture Damage under Heavy Traffic use condition, compare equal
Other road surfaces of construction cost have longer service life.
Brief description
The structural representation of the crack resistance type pavement structure by new the be applied to semi-rigid type base of this reality for the Fig. 1.
Wherein, 1, particulate formula asphalt upper layer；2nd, surface layer in grain formula asphalt in regenerated fiber；3rd, coarse grain
Formula asphalt cutting optimal；4th, rubber asphalt stress absorbing layer；5th, fibre cement stabilized macadam base；6th, cement slurry bonding
Layer；7th, low content cement stabilized gravel underlayment.
Specific embodiment
In order to more fully understand this utility model, explain content of the present utility model further with reference to embodiment, but
Content of the present utility model is not limited solely to the following examples.
As shown in figure 1, a kind of crack resistance type pavement structure being applied to semi-rigid type base, including being layed in roadbed from bottom to top
On low content cement stabilized gravel underlayment 7, cement slurry tack coat 6, glass fiber cement stabilized macadam base 5, rubber
Colophonium stress absorbing layer 4 and asphaltic road-mix surface course.Described asphaltic road-mix surface course includes coarse grain formula asphalt cutting optimal
3rd, surface layer 2 and particulate formula asphalt upper layer 1 in middle grain formula asphalt.Asphaltic road-mix surface course cutting optimal 3 adopts
Ac-25 type asphalt, thickness is 8cm；In asphaltic road-mix surface course, surface layer 2 adopts Regenerated Polyester Fibres ac-16 type Colophonium
Compound, thickness is 6cm；Asphaltic road-mix surface course upper layer 1 adopts sbs modification ac-13 type asphalt, and its thickness is
4cm.During asphaltic road-mix surface course laying, each interlayer spread sticking layer oil is to ensure interlaminar bonding performance.By increasing recycled polyester
Fiber can significantly increase the high-temperature stability of surface layer, low-temperature cracking-resistance and anti-fatigue performance in ac-16 type asphalt.
The thickness of low content cement stabilized gravel layer 7 is 20cm, and 7d unconfined compressive strength is 2.5mpa, and aggregate grading exists
Meet on the basis of " highway road surface construction technology detailed rules and regulations " (jtg/t f20-2015) table 4.5.4 requires by test really
Fixed, cement quality fraction is 3%.In other embodiments, the cement quality fraction in low content cement stabilized gravel layer 7 is permissible
For 2.0%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3.1%, 3.2%,
3.3% or 3.4%.
Described cement slurry tack coat 6, cement pressed by cement mortar: water is the proportions of 1.0:1.5～2.5, cement consumption
For 1.2kg/m2；Effectively improve low content cement stabilized gravel underlayment and fibre cement by arranging cement slurry tack coat
Contact conditions between stabilized macadam base.
Fibre cement stabilized macadam base 5 is glass fiber cement stabilization gravel layer, and its thickness is 32cm, and 7d no lateral spacing resists
Compressive Strength requires to reach 4.0mpa, and aggregate grading is meeting " highway road surface construction technology detailed rules and regulations " (jtg/t f20-2015)
Table 4.5.4 is determined by test on the basis of requiring, and cement quality fraction is 4.0%.The volume volume of glass fibre is
0.14%, glass fibre length is 18mm.
The rubber asphalt spreading amount of rubber asphalt stress absorbing layer 4 is 2.4kg/m2, the average spread quantity of rubble is 14kg/m2.
Regenerated Polyester Fibres volume in surface layer 2 in asphaltic road-mix surface course is 0.2%, fibre length 6mm.
The crack resistance type pavement structure that the present embodiment provides, decreases maintenance frequency in service life for the road and week in life-span
Current cost.Low content cement stabilized gravel underlayment 7 and fibre cement stabilized macadam base 5 can provide the intensity of design requirement
And rigidity, and there is excellent anti-drying shrinkage and temperature contraction performance.Cement slurry tack coat and rubber asphalt stress absorbing layer 4 have respectively
Effect is improved between underlayment and basis and basic unit and bituminous sheaths inter-layer contact condition, the generation in delayed reflex crack and development, simultaneously
Play water-impervious and enter effect.Regenerated Polyester Fibres can significantly increase the high-temperature stability of surface layer 2 in ac-16 type asphalt,
Low-temperature cracking-resistance and anti-fatigue performance, price is more less expensive than polyester fiber, more environmentally friendly.
Do not do in this utility model illustrate be prior art or be can achieve by prior art, Er Qieben
It is embodied as case described in utility model and is only preferable case study on implementation of the present utility model, be not used for limiting this practicality
New practical range.Equivalence changes and modification that i.e. all contents according to this utility model claim are made, all should make
For technology category of the present utility model.
Claims (2)
1. a kind of crack resistance type pavement structure being applied to semi-rigid type base is it is characterised in that include being layed in roadbed from bottom to top
On low content cement stabilized gravel underlayment, cement slurry tack coat, fibre cement stabilized macadam base, rubber asphalt stress
Absorbed layer and asphaltic road-mix surface course；
Described fibre cement stabilized macadam base thickness is 32～36cm；
Described low content cement stabilized gravel underlayment thickness is 16～20cm；
The rubber asphalt spreading amount of described rubber asphalt stress absorbing layer is 2.4～2.6kg/m2, rubble spread quantity be 12～
14kg/m2.
2. the crack resistance type pavement structure being applied to semi-rigid type base according to claim 1 is it is characterised in that described Colophonium
Mixture surface course includes coarse grain formula asphalt cutting optimal, surface layer and the drip of particulate formula in grain formula asphalt in regenerated fiber
Blue or green compound upper layer；Described coarse grain formula asphalt cutting optimal thickness degree is 6～8cm, and in regenerated fiber, grain formula Colophonium mixes
Closing surface thickness in material is 6～8cm, and particulate formula asphalt upper layer thickness degree is 4cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620684497.8U CN205917559U (en) | 2016-06-30 | 2016-06-30 | Anti type road surface structure of splitting suitable for semi rigid base course |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620684497.8U CN205917559U (en) | 2016-06-30 | 2016-06-30 | Anti type road surface structure of splitting suitable for semi rigid base course |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205917559U true CN205917559U (en) | 2017-02-01 |
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| CN201620684497.8U Expired - Fee Related CN205917559U (en) | 2016-06-30 | 2016-06-30 | Anti type road surface structure of splitting suitable for semi rigid base course |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123292A (en) * | 2021-05-06 | 2021-07-16 | 宁波交通工程建设集团有限公司 | River-adjacent water seepage-proof durable road structure and construction method |
| CN113668314A (en) * | 2021-08-26 | 2021-11-19 | 中铁建(山东)高东高速公路有限公司 | Medium-grain type drainage anti-cracking flexible base asphalt pavement structure and paving method |
| CN113718580A (en) * | 2021-09-14 | 2021-11-30 | 中交一公局集团有限公司 | Anti-crack pavement structure and construction method |
| CN116040985A (en) * | 2023-01-10 | 2023-05-02 | 江苏东交智控科技集团股份有限公司 | Green durable stress absorbing layer, preparation method thereof and pavement structure |
-
2016
- 2016-06-30 CN CN201620684497.8U patent/CN205917559U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123292A (en) * | 2021-05-06 | 2021-07-16 | 宁波交通工程建设集团有限公司 | River-adjacent water seepage-proof durable road structure and construction method |
| CN113668314A (en) * | 2021-08-26 | 2021-11-19 | 中铁建(山东)高东高速公路有限公司 | Medium-grain type drainage anti-cracking flexible base asphalt pavement structure and paving method |
| CN113718580A (en) * | 2021-09-14 | 2021-11-30 | 中交一公局集团有限公司 | Anti-crack pavement structure and construction method |
| CN116040985A (en) * | 2023-01-10 | 2023-05-02 | 江苏东交智控科技集团股份有限公司 | Green durable stress absorbing layer, preparation method thereof and pavement structure |
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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: 20170201 Termination date: 20170630 |