CN103628380A - Low-dose cement modified graded broken stone base pavement - Google Patents
Low-dose cement modified graded broken stone base pavement Download PDFInfo
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- CN103628380A CN103628380A CN201310619681.5A CN201310619681A CN103628380A CN 103628380 A CN103628380 A CN 103628380A CN 201310619681 A CN201310619681 A CN 201310619681A CN 103628380 A CN103628380 A CN 103628380A
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Abstract
The invention discloses a low-dose cement modified graded broken stone base pavement comprising an asphalt concrete pavement layer, an anti-seepage bonding layer and a soil foundation, wherein the anti-seepage bonding layer is paved above the soil foundation; the asphalt concrete pavement layer is paved above the anti-seepage bonding layer; a low-dose cement modified graded broken stone base is paved between the asphalt concrete pavement layer and the anti-seepage bonding layer. The low-dose cement modified graded broken stone base pavement has the advantages that structure is simple, construction is convenient and early destruction phenomenon can be avoided.
Description
Technical field
The present invention relates to road structure, relate in particular to low dosage modified cement graded broken stone base road surface.
Background technology
Highway in China traffic develop rapidly, in order to adapt to the growing needs of Heavy Traffic, the Pavement on Semi-rigid Type Base structure that the stabilized with inorganic binder rubbles such as road bound pair cement, lime form has been carried out a large amount of research.Semi-rigid type base has good plate body, larger rigidity, higher diffusion weight bearing power and supporting capacity, and the maximum flexural tensile stress value of asphalt surface course on it is reduced, thereby has improved the ability of asphalt surface course opposing driving fatigue failure.Therefore, semi-rigid type base is widely used in the sub-surface of high-grade highway, in domestic built speedway, more than 90% is Pavement on Semi-rigid Type Base.Yet semi-rigid type base self is intrinsic, be easy to shrinkage cracking, the poor defect of self-healing ability, cause pavement cracking serious; Road structure drainage condition is poor, after rainwater is built up, easily produces purt mud, thereby cause asphalt surface course check crack to destroy under high speed traveling.
The flexible material of graded broken stone and so on loose type is set between asphalt surface course and semi-rigid type base, is a kind of method that effectively delays asphalt pavement reflection cracking.Adopt high-quality graded broken stone as Semi-Rigid Pavement Structure transition zone, can work to subdue stress, effectively prevent the appearance of semi-rigid pavement reflection crack disease, thereby delay or eliminate other disease of flexible pavement.
Graded broken stone base, above semi-rigid type base, is good thermal insulation topping for semi-rigid type base.It protects uncracked semi-rigid type base to avoid producing temperature shrinkage crack, and the impact of the existing crack that also can cut off semi-rigid type base on asphalt surface course, even eliminates reflection crack.Meanwhile, due to the interlock action between aggregate, make graded broken stone become the deck that can bear certain traffic loading.
But because graded broken stone is a kind of discrete material, generally there is plastic strain large, rigidity is little, stress dispersion capacity is poor, the shortcomings such as flushing resistance is poor, simultaneously in Practical Project (especially for secondary and to get down the highway), the material source of graded broken stone is poor, broken processing, stack, mix and stir, transportation, pave, a series of production and construction link quality such as levelling are difficult to strict control, easily cause material structure grating unreasonable, mixture uniformity after moulding is poor, its effect can not always be guaranteed, under heavy traffic effect, can produce excessive post-construction deformation, cause Asphalt Pavement Surface Evenness to be affected, when serious, can make asphalt surface course produce shears and fatigue failure.Meanwhile, erosion resistibility is low, has more aggravated the destruction of flexible pavement.In order to address these problems, continue to keep graded broken stone to stop or delay the effect of Reflective Crack over Asphalt Pavement with Semi-rigid simultaneously, be necessary to research and propose a kind of novel road structure.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, a kind of simple in structure, easy construction is provided, can avoids occurring the low dosage modified cement graded broken stone base road surface of early damage phenomenon.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of low dosage modified cement graded broken stone base road surface, comprise asphalt concrete pavement, antiseepage tack coat and soil matrix, described antiseepage tack coat is layed in soil matrix top, described asphalt concrete pavement is layed in antiseepage tack coat top, is equipped with low dosage modified cement graded broken stone base between described asphalt concrete pavement and antiseepage tack coat.
In described low dosage modified cement graded broken stone base, be equipped with geotechnological member.
Described geotechnological member is geo-grid or geotechnological graticule mesh or geotechnical grid.
Between described antiseepage tack coat and soil matrix, be provided with semi-rigid material basic unit.
Described antiseepage tack coat is anti-seepage geotextile layer or waterproof viscous oil layer.
Described low dosage modified cement graded broken stone base is to add 1%～2.5% mass percent cement as the low dosage modified cement graded broken stone base of bonding material.
In described low dosage modified cement graded broken stone base, graded broken stone compositing range meets: 0.075mm sieve aperture corresponding mass percent of pass 0～7%, 0.6mm sieve aperture corresponding mass percent of pass 6%～25%, 2.36mm sieve aperture corresponding mass percent of pass 16%～40%, 4.75mm sieve aperture corresponding mass percent of pass 22%～55%, 9.50mm sieve aperture corresponding mass percent of pass 31%～80%, 19.0mm sieve aperture corresponding mass percent of pass 60%～95%, 26.5mm sieve aperture corresponding mass percent of pass 79%～100%, 31.5mm sieve aperture corresponding mass percent of pass 100%; Liquid limit <28%, moulds and refers to <9%, crush values <26%.
Compared with prior art, the invention has the advantages that:
The present invention lays low dosage modified cement graded broken stone base between asphalt concrete pavement and antiseepage tack coat, the intensity of cement by low dosage to graded broken stone, water stability and durability etc. are improved, test and theoretical research and engineering practice prove, meeting under the prerequisite of structural strength requirement, this modification graded broken stone material can reduce the shrinkage cracking of semi-rigid material effectively, improve graded broken stone water stability energy, the drainage performance of performance graded broken stone, improving existing graded broken stone volume stability, mechanical property, there is many advantages in long-term behaviour and application property aspect.The cement dose as bonding material adding in low dosage modified cement graded broken stone base of the present invention is 1%～2.5% mass percent, these are different from the research starting point of conventional cement stabilized macadam, the cement dose size adding has obvious difference, the present invention adds the modification graded broken stone obtaining after 1%～2.5% mass percent cement still to belong to the material of loose class rather than the plate body material of class cement stabilized macadam in graded broken stone; Low dosage modified cement graded broken stone base of the present invention had both improved stability, can meet again the requirement of macadam base material pavement performance, when keeping graded broken stone to stop or delay effect, the drainage of Reflective Crack over Asphalt Pavement with Semi-rigid, overcome the defect of graded broken stone as discrete material, avoided using the flexible pavement of graded broken stone base to occur early damage phenomenon.Using 1%～2.5% mass percent cement as bonding material, can improve physico mechanical characteristic, pavement performance and the durability of the graded broken stone of poor quality, thereby can relax the requirement of graded broken stone compositing range, the reality that adapts to graded broken stone difficult quality guarantee in Practical Project, strengthen grating crushing technique economic advantages, to apply.The present invention can further be equipped with geotechnological member in low dosage modified cement graded broken stone base, strengthens the globality of graded broken stone material structure, improves its rigidity, supporting capacity and non-deformability.Antiseepage tack coat can prevent to ooze and invade low dosage modified cement graded broken stone base bottom under the internal water of road surface, strengthens road structure anti-water damage ability.
Accompanying drawing explanation
Fig. 1 is the structural representation of first embodiment of the invention.
Fig. 2 is the structural representation of second embodiment of the invention.
In figure, each label represents:
1, asphalt concrete pavement; 2, low dosage modified cement graded broken stone base; 3, geotechnological member; 4, antiseepage tack coat; 5, semi-rigid material basic unit; 6, soil matrix.
The specific embodiment
Fig. 1 shows the first low dosage modified cement graded broken stone base road surface embodiment of the present invention, this basic unit road surface comprises asphalt concrete pavement 1, antiseepage tack coat 4 and soil matrix 6, antiseepage tack coat 4 is layed in soil matrix 6 tops, asphalt concrete pavement 1 is layed in antiseepage tack coat 4 tops, between asphalt concrete pavement 1 and antiseepage tack coat 4, be equipped with low dosage modified cement graded broken stone base 2, the intensity of cement by low dosage to graded broken stone, water stability and durability etc. are improved, test and theoretical research and engineering practice prove, meeting under the prerequisite of structural strength requirement, this modification graded broken stone material can reduce the shrinkage cracking of semi-rigid material effectively, improve graded broken stone water stability energy, the drainage performance of performance graded broken stone, improving existing graded broken stone volume stability, mechanical property, there is many advantages in long-term behaviour and application property aspect.
The present embodiment is equipped with geotechnological member 3 in low dosage modified cement graded broken stone base 2, can strengthen the globality of graded broken stone material structure, improves its rigidity, supporting capacity and non-deformability.Geotechnique's member 3 is geo-grid or geotechnological graticule mesh or geotechnical grid, antiseepage tack coat 4 is anti-seepage geotextile layer or waterproof viscous oil layer, antiseepage tack coat 4 can prevent to ooze and invade low dosage modified cement graded broken stone base 2 bottoms under the internal water of road surface, strengthens road structure anti-water damage ability.The present embodiment selects geo-grid as geotechnological member 3, selects anti-seepage geotextile layer as antiseepage tack coat 4.
In the present embodiment, in low dosage modified cement graded broken stone base 2, add 1%～2.5% mass percent cement as bonding material, these are different from the research starting point of conventional cement stabilized macadam, the cement dose size adding has obvious difference, the present invention adds the modification graded broken stone obtaining after 1%～2.5% mass percent cement still to belong to the material of loose class rather than the plate body material of class cement stabilized macadam in graded broken stone; In the present invention, low dosage modified cement graded broken stone base 2 had both improved stability, can meet again the requirement of macadam base material pavement performance, when it continues the prevention of maintenance graded broken stone or delays the effect of Reflective Crack over Asphalt Pavement with Semi-rigid, drainage, overcome the defect of graded broken stone as discrete material, avoided using the flexible pavement of graded broken stone base to occur early damage phenomenon.
In low dosage modified cement graded broken stone base 2, graded broken stone compositing range meets: 0.075mm sieve aperture corresponding mass percent of pass 0～7%, 0.6mm sieve aperture corresponding mass percent of pass 6%～25%, 2.36mm sieve aperture corresponding mass percent of pass 16%～40%, 4.75mm sieve aperture corresponding mass percent of pass 22%～55%, 9.50mm sieve aperture corresponding mass percent of pass 31%～80%, 19.0mm sieve aperture corresponding mass percent of pass 60%～95%, 26.5mm sieve aperture corresponding mass percent of pass 79%～100%, 31.5mm sieve aperture corresponding mass percent of pass 100%; Liquid limit <28%, moulds and refers to <9%, crush values <26%.Owing to usining 1%～2.5% mass percent cement as bonding material, can improve physico mechanical characteristic, pavement performance and the durability of the graded broken stone of poor quality, thereby can relax the requirement of graded broken stone compositing range, the reality that adapts to graded broken stone difficult quality guarantee in Practical Project, strengthen grating crushing technique economic advantages, to apply.
In the present embodiment, 0.075mm sieve aperture corresponding mass percent of pass 0%, 0.6mm sieve aperture corresponding mass percent of pass 8%, 2.36mm sieve aperture corresponding mass percent of pass 18.8%, 4.75mm sieve aperture corresponding mass percent of pass 29%, 9.50mm sieve aperture corresponding mass percent of pass 44.4%, 19.0mm sieve aperture corresponding mass percent of pass 68%, 26.5mm sieve aperture corresponding mass percent of pass 87.6%, 31.5mm sieve aperture corresponding mass percent of pass 100%; Liquid limit 18.2%, plastic limit 16.3%, moulds and refers to be 1.9%, crush values 24.3%.
Fig. 2 shows the second low dosage modified cement graded broken stone base road surface embodiment of the present invention, and the present embodiment and a upper embodiment are basic identical, and difference is only: between antiseepage tack coat 4 and soil matrix 6, be provided with semi-rigid material basic unit 5.
Although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention.Any those of ordinary skill in the art, in the situation that not departing from technical solution of the present invention scope, can utilize the technology contents of above-mentioned announcement to make many possible changes and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solution of the present invention,, all should drop in the scope of technical solution of the present invention protection any simple modification made for any of the above embodiments, equivalent variations and modification according to the technology of the present invention essence.
Claims (10)
1. a low dosage modified cement graded broken stone base road surface, comprise asphalt concrete pavement (1), antiseepage tack coat (4) and soil matrix (6), described antiseepage tack coat (4) is layed in soil matrix (6) top, described asphalt concrete pavement (1) is layed in antiseepage tack coat (4) top, it is characterized in that: between described asphalt concrete pavement (1) and antiseepage tack coat (4), be equipped with low dosage modified cement graded broken stone base (2).
2. low dosage modified cement graded broken stone base according to claim 1 road surface, is characterized in that: in described low dosage modified cement graded broken stone base (2), be equipped with geotechnological member (3).
3. low dosage modified cement graded broken stone base according to claim 2 road surface, is characterized in that: described geotechnological member (3) is geo-grid or geotechnological graticule mesh or geotechnical grid.
4. according to the low dosage modified cement graded broken stone base road surface described in any one in claims 1 to 3, it is characterized in that: between described antiseepage tack coat (4) and soil matrix (6), be provided with semi-rigid material basic unit (5).
5. according to the low dosage modified cement graded broken stone base road surface described in any one in claims 1 to 3, it is characterized in that: described antiseepage tack coat (4) is anti-seepage geotextile layer or waterproof viscous oil layer.
6. low dosage modified cement graded broken stone base according to claim 4 road surface, is characterized in that: described antiseepage tack coat (4) is anti-seepage geotextile layer or waterproof viscous oil layer.
7. according to the low dosage modified cement graded broken stone base road surface described in any one in claims 1 to 3, it is characterized in that: described low dosage modified cement graded broken stone base (2) is for to add 1%～2.5% mass percent cement as the low dosage modified cement graded broken stone base of bonding material.
8. low dosage modified cement graded broken stone base according to claim 6 road surface, is characterized in that: described low dosage modified cement graded broken stone base (2) is for to add 1%～2.5% mass percent cement as the low dosage modified cement graded broken stone base of bonding material.
9. according to the low dosage modified cement graded broken stone base road surface described in any one in claims 1 to 3, it is characterized in that: in described low dosage modified cement graded broken stone base (2), graded broken stone compositing range meets: 0.075mm sieve aperture corresponding mass percent of pass 0～7%, 0.6mm sieve aperture corresponding mass percent of pass 6%～25%, 2.36mm sieve aperture corresponding mass percent of pass 16%～40%, 4.75mm sieve aperture corresponding mass percent of pass 22%～55%, 9.50mm sieve aperture corresponding mass percent of pass 31%～80%, 19.0mm sieve aperture corresponding mass percent of pass 60%～95%, 26.5mm sieve aperture corresponding mass percent of pass 79%～100%, 31.5mm sieve aperture corresponding mass percent of pass 100%, liquid limit <28%, moulds and refers to <9%, crush values <26%.
10. low dosage modified cement graded broken stone base according to claim 8 road surface, it is characterized in that: in described low dosage modified cement graded broken stone base (2), graded broken stone compositing range meets: 0.075mm sieve aperture corresponding mass percent of pass 0～7%, 0.6mm sieve aperture corresponding mass percent of pass 6%～25%, 2.36mm sieve aperture corresponding mass percent of pass 16%～40%, 4.75mm sieve aperture corresponding mass percent of pass 22%～55%, 9.50mm sieve aperture corresponding mass percent of pass 31%～80%, 19.0mm sieve aperture corresponding mass percent of pass 60%～95%, 26.5mm sieve aperture corresponding mass percent of pass 79%～100%, 31.5mm sieve aperture corresponding mass percent of pass 100%, liquid limit <28%, moulds and refers to <9%, crush values <26%.
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Cited By (7)
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| CN104480826A (en) * | 2014-12-16 | 2015-04-01 | 青海富腾生态科技有限公司 | Asphalt pavement with waterproof stress layer and construction method and application of asphalt pavement |
| CN104499398A (en) * | 2014-12-12 | 2015-04-08 | 东南大学 | Asphalt pavement structure applicable to expansion deformation of black cotton soil subgrade |
| CN104499397A (en) * | 2014-12-12 | 2015-04-08 | 东南大学 | Asphalt pavement structure based on coordination of deformation of subgrade and pavement |
| CN106087639A (en) * | 2016-08-15 | 2016-11-09 | 长江勘测规划设计研究有限责任公司 | A kind of highway, Irish bridge structure and Irish bridge construction method |
| CN109507402A (en) * | 2018-11-14 | 2019-03-22 | 新疆大学 | The method for testing performance of bituminous pavement and asphalt concrete structure preparation method to be measured |
| CN109695192A (en) * | 2019-01-15 | 2019-04-30 | 济南城建集团有限公司 | A kind of slabstone building block paving structure suitable for traffic loadings at different levels |
| CN115491943A (en) * | 2022-09-27 | 2022-12-20 | 河南省交通规划设计研究院股份有限公司 | Modular basic unit anti-reflection crack bituminous pavement structure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499398A (en) * | 2014-12-12 | 2015-04-08 | 东南大学 | Asphalt pavement structure applicable to expansion deformation of black cotton soil subgrade |
| CN104499397A (en) * | 2014-12-12 | 2015-04-08 | 东南大学 | Asphalt pavement structure based on coordination of deformation of subgrade and pavement |
| CN104480826A (en) * | 2014-12-16 | 2015-04-01 | 青海富腾生态科技有限公司 | Asphalt pavement with waterproof stress layer and construction method and application of asphalt pavement |
| CN106087639A (en) * | 2016-08-15 | 2016-11-09 | 长江勘测规划设计研究有限责任公司 | A kind of highway, Irish bridge structure and Irish bridge construction method |
| CN109507402A (en) * | 2018-11-14 | 2019-03-22 | 新疆大学 | The method for testing performance of bituminous pavement and asphalt concrete structure preparation method to be measured |
| CN109507402B (en) * | 2018-11-14 | 2021-05-28 | 新疆大学 | Performance detection method of asphalt pavement and preparation method of asphalt concrete structure to be detected |
| CN109695192A (en) * | 2019-01-15 | 2019-04-30 | 济南城建集团有限公司 | A kind of slabstone building block paving structure suitable for traffic loadings at different levels |
| CN115491943A (en) * | 2022-09-27 | 2022-12-20 | 河南省交通规划设计研究院股份有限公司 | Modular basic unit anti-reflection crack bituminous pavement structure |
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