CN101935970A - High-modulus asphalt macadam (HMAM) base course structure and laying method thereof - Google Patents
High-modulus asphalt macadam (HMAM) base course structure and laying method thereof Download PDFInfo
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- CN101935970A CN101935970A CN 201010166745 CN201010166745A CN101935970A CN 101935970 A CN101935970 A CN 101935970A CN 201010166745 CN201010166745 CN 201010166745 CN 201010166745 A CN201010166745 A CN 201010166745A CN 101935970 A CN101935970 A CN 101935970A
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Abstract
The invention relates to a high-modulus asphalt macadam (HMAM) base course structure and a laying method thereof. The conventional base course is single, while the high-modulus asphalt macadam base course has high fatigue cracking resistance and stability. Low-grade asphalt serves as a binder material and continuous dense gradation macadam serves as an aggregate; and the base course structure is prepared by the following steps of: heating the aggregate to the temperature of between 175 and 185 DEG C and thermally mixing with the binder material which is heated to the temperature of between 160 and 175 DEG C to form a mixed material. The laying method comprises the following steps of: cleaning the surface of an underlying stratum and laying the mixed material on the underlying stratum for rolling compaction and molding, wherein the out-of-factory temperature of the mixed material is between 170 and 180 DEG C, the laying temperature is more than or equal to 160 DEG C, the initial pressing temperature is more than or equal to 155 DEG C and the final pressing temperature is more than or equal to 100 DEG C; and finishing the aging and opening traffic. The base course structure has the advantages of capacity of improving the modulus and anti-fatigue performance of the asphalt macadam and application to heavy transportation roads.
Description
Technical field:
The present invention relates to a kind of road structure, specifically refer to a kind of high-modulus asphalt macadam pavement base layer structure and laying method thereof that is used in basic unit, subbase.
Background technology:
China Higher level highway especially speedway is being faced with the baptism that vehicle flowrate is big, heavily loaded even overload, and by in June, 2009, the speedway that China has built up just reaches about 7.5 ten thousand kilometers, occupies the second place of the world.In highway open to traffic mileage, the mileage number of semi-rigid type base asphalt concrete pavement accounts for more than 95% of total quantity greatly, significantly improve though all have before present semi-rigid type base asphalt concrete pavement material technology, method for designing and construction technology etc. are relative, yet the temperature of producing contracts because semi-rigid type base has, the birth defects of shrinkage crack, therefore the considerable part road surface all has been subjected to the puzzlement of early disease after operation, short then 3～5 years, long then will the crack occur in 8～10 years and the large tracts of land maintenance or overhaul reconstruction of having to.
Sub-surface is the main bearing course on road surface, and its quality directly affects the functional performance and the application life on road surface, so basic unit must possess good pavement performance; At first, should have enough strength and stiffness, to bear the effect repeatedly of wheel load; Secondly, enough water stabilities and durability must be arranged, with the moisture that oozes under the opposing road surface basic unit be produced and corrode and fatigue effect.
The high-modulus asphalt crushed rock base course is the flexbile base structure of basic unit just with high-modulus asphalt rubble HMAM, good antifatigue cracking ability and outstanding high and low temperature stability are arranged, can be used for reducing the gross thickness of road structure, improve resistance to deformation and anti-fatigue ability, be applicable to the road of heavy traffic, can prolong road application life.
Summary of the invention:
The technical problem to be solved in the present invention provide a kind of have higher modulus, good anti-fatigue ability and excellent high temperature stability can high-modulus asphalt rubble (HMAM) sub-surface structure and laying method thereof, to solve the fatigue durability problem poor, that easily produce reflection crack and damage in early days that the present semi-rigid type base that generally uses exists, for too single semi-rigid type base structure proposes a kind of replacement scheme.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of high-modulus asphalt rubble (HMAM) sub-surface structure, be to be binder with low grade pitch, with continuous close-graded rubble is aggregate, aggregate is heated to the 175-185 ℃ of binder heat with the described 160-175 of being heated to ℃ mixes the formation compound.
Above-mentioned binder is 4～6: 100 with the aggregate quality ratio.
Above-mentioned low grade pitch is 10～No. 30 pitches.
The laying method of above-mentioned high-modulus asphalt rubble (HMAM) sub-surface structure is: at first clean the substratum surface; Then with the above-mentioned mixture laying that mixes on substratum, roller-compaction; In the decking and rolling process, the compound temperature of dispatching from the factory is 170-180 ℃, the temperature that paves 〉=160 ℃, first pressing temperature 〉=155 ℃, final pressure temperature 〉=100 ℃; Wait for the length of time and finish open to traffic afterwards, void content≤10%.
The roller-compaction thickness of above-mentioned compound is 6～10mm, the following table of design grating of aggregate:
In the table: HMAM-20 represents that the aggregate nominal maximum aggregate size is the compound of 19mm.
The roller-compaction thickness of above-mentioned compound is 8～12mm, the following table of design grating of aggregate:
In the table: HMAM-25 represents that the aggregate nominal maximum aggregate size is the compound of 26.5mm.
The roller-compaction thickness of above-mentioned compound is 9～15mm, the following table of design grating of aggregate:
In the table: HMAM-30 represents that the aggregate nominal maximum aggregate size is the compound of 31.5mm.
The present invention has following advantage and effect with respect to prior art:
1, have higher dynamic modulus and compression rebound modulu, 20 ℃ dynamic modulus has improved more than 50% than plain asphalt rubble, and its compression rebound modulu also much larger than the plain asphalt stabilization gravel, has improved more than 20% than plain asphalt stabilization gravel.
2, whole stressed reasonable, improved the antifatigue of bituminous mixture and the performance of distortion, fatigue behaviour obviously is better than the plain asphalt stabilization gravel, and fatigue life, (is standard with 4 tired beam tests) can improve more than 3 times.As the basic unit or the subbase on road surface, be applicable to the road of heavy traffic, can prolong its application life;
3, have stronger high temperature stability performance, when 40 ℃ and 60 ℃, the dynamic stability of high-modulus asphalt stabilization gravel can reach more than 2 times of plain asphalt stabilization gravel.
4, reduced road structure thickness, can reduce road surface thickness more than 5% with respect to plain asphalt crushed rock base course flexible pavement, road structure can be reduced more than 10% with respect to semi-rigid asphalt pavement, road surface thickness can be reduced more than 12% with respect to the composite base flexible pavement.Save resource, the reduction of erection time.
5, asphalt pavement structure is the full depth asphalt pavement structure, and when keeping in repair or reconstructing latter stage in application life, surface layer and base material major part can be utilized, and not only save resource, help environmental protection simultaneously.
The specific embodiment:
The present invention is described in detail below in conjunction with specific embodiment.
Embodiment 1
A kind of high-modulus asphalt rubble (HMAM) sub-surface structure, be to be binder with 1 ton of No. 10 pitch, with 22.2 tons of continuous close-graded rubbles is aggregate (seeing Table one), with aggregate be heated to 175 ℃ be heated to 160 binder heat and mix the formation compound, compound discharging in the time of 170 ℃; During laying, at first clean the substratum surface; Then with the mixture laying that mixes on substratum, roller-compaction; In the decking and rolling process; The temperature that paves is 165 ℃, and the first pressing temperature is 155 ℃, and the final pressure temperature is 100 ℃, and molding thickness is 6～10cm; Wait for the length of time and finish open to traffic afterwards, void content is 6%.
Table one HMAM-20 (the aggregate nominal maximum aggregate size is 19mm) grating table
Embodiment 2
A kind of high-modulus asphalt rubble (HMAM) sub-surface structure, be to be binder with 1 ton of No. 30 pitch, with 16.7 tons of continuous close-graded rubbles is aggregate (seeing Table two), with aggregate be heated to 180 ℃ be heated to 170 ℃ of binder heat and mix the formation compound, compound discharging in the time of 175 ℃; During laying, at first clean the substratum surface; Then with the mixture laying that mixes on substratum, roller-compaction, in the decking and rolling process, the temperature that paves 〉=170 ℃; First pressing temperature 〉=160 ℃, final pressure temperature 〉=110 ℃, molding thickness is 8～12cm, open to traffic after waiting for the length of time and finishing, void content is 10%.
Table two HMAM-25 (the aggregate nominal maximum aggregate size is 26.5mm) grating table
Embodiment 3
A kind of high-modulus asphalt rubble (HMAM) sub-surface structure, be to be binder with 1 ton of No. 20 pitch, with 20.7 tons of continuous close-graded rubbles is that aggregate (sees Table three, the aggregate nominal maximum aggregate size is 31.5mm), aggregate is heated to 185 ℃ mixes the formation compound, 180 ℃ of compound dischargings with the binder heat that is heated to 175 ℃; During laying, at first clean the substratum surface; Then with the mixture laying that mixes on substratum, roller-compaction; In the decking and rolling process, the temperature that paves 〉=175 ℃, first pressing temperature 〉=165 ℃, final pressure temperature 〉=120 ℃, molding thickness 〉=9～15cm; Wait for the length of time and finish open to traffic afterwards, void content is 8%.
Table three HMAM-30 (the aggregate nominal maximum aggregate size is 31.5mm) grating table
The foregoing description 1 is a preferred forms.
Claims (7)
1. a high-modulus asphalt rubble (HMAM) sub-surface structure, it is characterized in that: be to be binder with low grade pitch, with continuous close-graded rubble is aggregate, aggregate is heated to the 175-185 ℃ of binder heat with the described 160-175 of being heated to ℃ mixes the formation compound.
2. a kind of high-modulus asphalt rubble according to claim 1 (HMAM) sub-surface structure is characterized in that: described binder is 4～6: 100 with the aggregate quality ratio.
3. a kind of high-modulus asphalt rubble according to claim 2 (HMAM) sub-surface structure is characterized in that: described low grade pitch is 10～No. 30 pitches.
4. the laying method of any described high-modulus asphalt rubble of right 1-3 (HMAM) sub-surface structure is characterized in that: comprise the steps: at first to clean the substratum surface; Then with the mixture laying that mixes on substratum, roller-compaction; In the decking and rolling process, the compound temperature of dispatching from the factory is 170-180 ℃, the temperature that paves 〉=160 ℃, first pressing temperature 〉=155 ℃, final pressure temperature 〉=100 ℃; Wait for the length of time and finish open to traffic afterwards, void content≤10%.
5. according to the laying method of the described sub-surface structure of claim 4, it is characterized in that: the roller-compaction thickness of described compound is 6～10mm, the following table of design grating of described aggregate:
In the table: HMAM-20 represents that the aggregate nominal maximum aggregate size is the compound of 19mm.
6. according to the laying method of the described sub-surface structure of claim 4, it is characterized in that: the roller-compaction thickness of described compound is 8～12mm, the following table of design grating of described aggregate:
In the table: HMAM-25 represents that the aggregate nominal maximum aggregate size is the compound of 26.5mm.
7. according to the laying method of the described sub-surface structure of claim 4, it is characterized in that: the roller-compaction thickness of described compound is 9～15mm, the following table of design grating of described aggregate:
In the table: HMAM-30 represents that the aggregate nominal maximum aggregate size is the compound of 31.5mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010166745 CN101935970A (en) | 2010-05-07 | 2010-05-07 | High-modulus asphalt macadam (HMAM) base course structure and laying method thereof |
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| CN 201010166745 CN101935970A (en) | 2010-05-07 | 2010-05-07 | High-modulus asphalt macadam (HMAM) base course structure and laying method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255696A (en) * | 2013-05-15 | 2013-08-21 | 长安大学 | Semi-rigid pavement structure and joint type graded broken stone mixture used in semi-rigid pavement structure |
| CN105601175A (en) * | 2015-12-18 | 2016-05-25 | 厦门华特公路沥青技术有限公司 | High-modulus asphalt paving material and preparation method thereof |
-
2010
- 2010-05-07 CN CN 201010166745 patent/CN101935970A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 《中外公路》 20090831 丁小军，柴福斌，李刚，陈波 高模量沥青混合料在阿尔及利亚东西高速公路上的应用 第29卷, 第4期 2 * |
| 《交通世界（建养.机械）》 20090731 何新原，严建和 高模量沥青混凝土技术应用 , 第7期 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255696A (en) * | 2013-05-15 | 2013-08-21 | 长安大学 | Semi-rigid pavement structure and joint type graded broken stone mixture used in semi-rigid pavement structure |
| CN103255696B (en) * | 2013-05-15 | 2015-09-16 | 长安大学 | The connection type graded broken stone mixture of a kind of Semi-Rigid Pavement Structure and use thereof |
| CN105601175A (en) * | 2015-12-18 | 2016-05-25 | 厦门华特公路沥青技术有限公司 | High-modulus asphalt paving material and preparation method thereof |
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Application publication date: 20110105 |