CN201003133Y - Rolled flexible fiber cement concrete as foundation pavement structure - Google Patents
Rolled flexible fiber cement concrete as foundation pavement structure Download PDFInfo
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- CN201003133Y CN201003133Y CNU2006201639070U CN200620163907U CN201003133Y CN 201003133 Y CN201003133 Y CN 201003133Y CN U2006201639070 U CNU2006201639070 U CN U2006201639070U CN 200620163907 U CN200620163907 U CN 200620163907U CN 201003133 Y CN201003133 Y CN 201003133Y
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Abstract
The utility model relates to a road structure which grinds soft fiber, the cement and the beton as the base structure and relates to the road structure. The utility model adopts the cementation felt material, the filling and the addition material which are made of mixed by soft fiber, emulsification asphaltum, cement or water to form the soft fiber emulsification asphaltum steady material road base 2 which is spread on the base layer 3; and then a surface layer 1 is spread on the soft fiber emulsification asphaltum steady material road base 2. The early plastic shrinking, the dry shrinking and the warm shrinking of the soft fiber soft fiber emulsification asphaltum steady material are improved after adding the soft fiber; the breaking proof, the tenacity, the attacking proof, the freezing proof, the erosion proof and the water stability function of the utility model are obviously enhanced; and the fatigue proof capability of the utility model is enhanced greatly. When the soft fiber emulsification asphaltum steady material is taken as the road structure, the shrinking clearance of the base layer is obviously reduced; the deformation proof, the breaking proof, the stability and the fatigue proof function of the utility model are enhanced greatly; and other physical functions of the utility model are enhanced obviously; and the utility model is beneficial to reduce the disaster of the road surface and enhance the road utilizing function of the road and lengthen the service life.
Description
One, technical field
The utility model relates to pavement engineerings such as highway construction, especially a kind of road structure that rolls the flexible fiber cement concrete as basic unit.
Two, background technology
The background technology of present road surface base layer material aspect
1, the stabilized with inorganic binder basic unit's (semi-rigid type base) that gathers materials
Stabilized with inorganic binder is gathered materials, be with inorganic binder (cement, lime, flyash etc.), gather materials (rubble, gravel etc.) and water mixing and stirring, become the suitable semi-rigid type base compound that rolls, then with its making on roadbed, after rolling, road roller forms the road surface semi-rigid type base, as cement stabilized macadam base, cement Stability Gravel basic unit, lime fly ash crushed rock base course etc.No matter Pavement on Semi-rigid Type Base is ordinary highway, or speedway in our country, has all obtained a large amount of application.The flexible pavement or the cement pavement of more than 30,000 kilometer speedway of China, basic unit all is semi-rigid type base more than 90%, semi-rigid type base has been brought into play very big effect in the highway construction development of China.
The advantage of semi-rigid type base is: the semi-rigid type base strength ratio is higher, relative flexibility basic unit intensity height, rigidity height, and as load-carrying members, it is proper.Carrying, diffusion load pass to roadbed, and this respect performance is not relatively good before semi-rigid type base has cracking.But there are some problems in semi-rigid type base, is exactly that plastic shrinkage cracking is more serious, and resistance to tension compares less, and deformability is not so good, is more crisp material.Its ratio of rigidity is bigger, in the humidity transformation temperature changes suffered thermal stresses greatly, so at temperature load, traffic loading, under the effect that humidity changes, it is easy to generate the crack, semi-rigid type base character begins to change after the cracking.These crackles are easy to form the reflection crack of flexible pavement, and particularly under the many situation of later stage crackle, crackle is easy on the relatively shorter time just reflexes to, and a lot of actual engineerings have proved this problem.This is at present semi-rigid asphalt pavement to be thought the place of its deficiency.
In order to prevent reflective crack, China road expert has also done some researchs in the enforcement period of the seventh five-year plan, for example as adopting graded broken stone, geotextiles and stress absorbing layer as some measures such as intermediate layers, to recently, the similar 20 years time, is still also groping.The research reflective crack, how to delay it, prevent it is impossible fully, how to prolong its expansion time, make its crack deflection long, keep the long time of surface can not ftracture, done a lot of work in this respect to the time on the face, obtained some achievements, but this problem does not solve fully also till now yet.
Semi-rigid type base has also been found some problems in work progress, relatively more difficult such as the priming oil infiltration, also have the semi-rigid type base surface to be easy to generate dust, unclean if the generation dust is cleared up when constructing later on, just influenced the bonding of adhesion coating and semi-rigid type base.After the pavement cracking, go under water just to damage easily in addition.After semi-rigid type base has problems, must all dig up it and could repair, like this with regard to some difficulty.
Therefore, talk about semi-rigid type base now, we should suit measures to local conditions to consider this problem.If condition is suitable, semi-rigid type base still can be used in some place, it also is not right that but semi-rigid type base rules all the land, no matter be from enriching the angle of China's road structure form, still from overcoming the angle of Pavement on Semi-rigid Type Base cracking problem, the research of carrying out other type base material is very necessary.
2, roll cement concrete basic unit (rigid base)
Rolling cement concrete is a kind of new concrete that grows up in the last thirty years.It has particular performances, the performance of roller compacted concrete is not different from conventional concrete fully before not solidifying, not solidified roller compacted concrete denseness is very dried, no slump concrete than worker China Democratic National Construction Association is also done, be that a kind of slump is zero super no slump concrete, it can make bulldozer, road roller work and do not sink thereon, and is very approaching with the concrete performance of routine again after solidifying.Roller compacted concrete makes stone overcome frictional resistance and occupies space formation skeleton by the effect of road roller vibration force, and hole is filled and wrapped up by cement mortar, forms compacting body.
Roll that cement concrete has that the construction machinery capacity is big, speed is fast, the characteristics of large tracts of land operation.Roll cement concrete and have similar workability to semi-rigid sub-base material, but cement consumption was greater than the consumption of inorganic binder in the semi-rigid sub-base material during its material was formed, therefore will roll cement concrete as sub-surface, will have better performance at aspects such as intensity, durability, scour resistances than semi-rigid type base.
Roll cement concrete and aspect the build of the build of water conservancy project dam body and high grade highway pavement more application is being arranged.Roll cement concrete basic unit from material property, still belong to the category (rigid material) of conventional cement concrete, it is out of shape bad adaptability, fragility is big, crack resistance is poor.Therefore if do not establish the shrinkage joint, the crack appears in regular meeting in the road surface, at present when pavement construction, usually every 10～15m a shrinkage joint is set in the road surface.
In recent years, for raising rolls the cracking resistance of cement concrete, what steel fibre occurred mixing rolls the road structure of cement concrete as surface layer, and its research at home and abroad is just at the early-stage.External steel fibre rolls cement concrete and shows as the road structure engineering applicable cases of surface layer, the functional performance on road surface and durability are improved and improve, but (generally mix 30kg～40kg in every cubic meter of concrete because the volume of steel fibre is higher, even it is higher), involve great expense, and in the roller compacted concrete of moisture content less, mix the steel fibre of rigidity, fiber is difficult for disperseing, mix and stir difficulty, it is not too convenient to construct, therefore, the steel fibre large scale application that rolls cement concrete has been subjected to certain restriction.
At present, flexible fiber has obtained certain application in common casting cement concrete, and the result shows that the mechanical property that toughening effect has significantly improved cement concrete is split in the resistance of flexible fiber, makes cement concrete have good cracking resistance and anti-fatigue performance.The application of flexible fiber in rolling cement concrete basic unit also certainly will have excellent generalization values, but up to the present, this technology does not cause people's attention as yet.
3, the stable basic unit's (flexbile base) that gathers materials of pitch
Flexbile base is to be different from that stabilized with inorganic binder is gathered materials or semi-rigid type base such as Stabilized Soil, with gather materials, the gathering materials or the basic unit of material makings such as organic binder compound such as pitch of small amounts of inorganic binder punishment.At present, the pitch stabilization gravel is a kind of common flexbile base.
The pitch stabilization gravel compares with semi-rigid type base, because its modulus of elasticity is little, so its situation aspect variations in temperature generation stress influence is better relatively than semi-rigid type base, effects of humidity change also wants littler simultaneously, so it is embodying good advantage aspect the road reflection crack that the minimizing base course crack causes.
Interrelated data proves that the destruction on pitch stabilized macadam base road surface generally starts from surface layer, because destruction order development from top to bottom, extensions such as the rut of surface layer, crackings.Often can self-healing for the inner minute crack that occurs in pitch stabilized macadam base road surface, and be unlikely the picture semi-rigid sub-base material, the crack appears and after, expansion rapidly, so the destruction on pitch stabilized macadam base road surface is functional destruction.
But, in pitch stabilized macadam base road structure, tensile stress at the bottom of basic unit's layer is bigger, the possibility that occurs layer end fatigue cracking under the effect repeatedly of flexural tensile stress is also maximum, therefore require to have good durability, have good anti-fatigue performance especially, and require to have certain rutting resistance and stability, pitch stabilized macadam base to await in this respect to improve as bearing course.
In addition, pitch in the stable basic unit that gathers materials of existing pitch generally is to adopt hot asphalt, need pitch is heated to about 150 ℃～160 ℃, gather materials and be heated to about 160 ℃～175 ℃, pitch should be controlled at 150 ℃～165 ℃ with the temperature of dispatching from the factory of mixing and stirring the back compound of gathering materials, the temperature that paves is not less than 145 ℃, the first pressing temperature is not less than 135 ℃, the final pressure temperature generally is not less than 80 ℃, and just can not construct when temperature is low in the winter time, therefore, stable the mixing and stirring of gathering materials of hot asphalt, construction requirement is higher and complicated, and simultaneously, hot asphalt is contaminated environment not only, and pitch is in for a long time and also will speed up the aging of pitch under the high temperature, influence pitch and stablizes the durability of gathering materials.
Three, summary of the invention
The purpose of this utility model is: by mixing flexible fiber in the cement concrete mixture toward rolling, utilize the resistance of flexible fiber to split toughness reinforcing and antifatigue effect, improve performances such as its anti-contraction, cracking resistance, shock resistance, resistance to deformation, freeze proof, antiscour, antifatigue, and with road roller it is rolled to form and roll flexible fiber cement concrete pavement basic unit and build on bottom, and then build surface layer rolling in the flexible fiber cement concrete pavement basic unit, constitute a kind of road structure that rolls the flexible fiber cement concrete as basic unit together.
The technical scheme that the utility model purpose is taked is as follows:
Road structure of the present utility model, include surface layer, roll flexible fiber cement concrete pavement basic unit, bottom, roll flexible fiber cement concrete pavement basic unit at the bottom surface making, rolling making surface layer in the flexible fiber cement concrete pavement basic unit then.
The utility model, roll flexible fiber cement concrete pavement basic unit by flexible fiber, cement, gather materials (rubble or gravel), sand, water, filler and Admixture etc. form and formation adhered to one another behind mix, every cubic metre is rolled that above-mentioned material contains 0.2～3kg, 80～400kg, 1100～1800kg, 100～800kg, 80～160kg, 0～500kg, 0～4kg by weight in the flexible fiber cement concrete, rolls flexible fiber cement concrete pavement basic unit through rolling to form.
The utility model, surface layer can be Portland Cement Concrete Surface Course or asphalt concrete pavement, also can be the surface layers of other any modification ground surface material making.
The utility model, bottom can be roadbeds, also can be the basic units of various types: as semi-rigid type base, flexbile base or rigid base; Also can be original road surface of old road: as cement concrete pavement, perhaps flexible pavement.
The utility model, flexible fiber is meant with respect to rigid fiber (high-elastic modulus fibre, as steel fibre), modulus of elasticity is less than the low-elasticity-modulus organic synthetic fibers of cement concrete bullet mould, as polypropylene fibre, polyacrylonitrile fibre, polyamide (nylon) fiber etc.Utilize the resistance of flexible fiber to split toughness reinforcing and antifatigue effect, improve performances such as its anti-contraction, cracking resistance, shock resistance, resistance to deformation, freeze proof, antiscour, antifatigue.
The utility model is a kind of new road structure pattern, and it has following advantage:
(1) rolls in the flexible fiber cement concrete disorderly and also help reducing concrete plastic shrinkage to the flexible fiber that distributes, significantly strengthen the ability of concrete opposing shrinkage cracking, therefore can significantly prolong the spacing that rolls cement concrete basic unit transverse contraction seam, in addition, by adjusting the cement consumption in the match ratio, but the jointless continuous basic unit of making road structure also.
(2) roll the internal construction composition that the flexible fiber cement concrete has improved base material, form the framework compact type structure, reduced the generation of inner microcrack, therefore help improving the combination property of base material.
(3) compare with existing semi-rigid type base, rigid base, flexbile base road structure, roll in the road structure of flexible fiber cement concrete as basic unit, base material has anti-contraction, cracking resistance is strong, good toughness, the intensity height, therefore shock resistance, frost resistance, antiscour, the advantage that anti-fatigue performance is good roll the flexible fiber cement concrete and have better pavement performance and durability as the road structure of basic unit, have significant indirect economic effect and social benefit.
(4) compare with existing semi-rigid type base, rigid base, flexbile base road structure, roll the flexible fiber cement concrete, have good economic benefit as the suitable thickness on attenuate road surface of the road structure of basic unit.
In sum, the utility model is a kind ofly both to be different from existing Pavement on Semi-rigid Type Base structure, to be different from existing rigid base road structure, also is different from the novel road surface structure of existing flexbile base road structure.
The utility model can with the condition of existing semi-rigid type base, rigid base or flexbile base road structure same base layer thickness under, improve the anti-contraction, cracking resistance, toughness, shock resistance of base material, freeze proof, antiscour, anti-fatigue performance etc., improve the pavement performance and the durability of road; Can descend in the prerequisite that guarantees good pavement performance and durability and hang down the thickness on road surface, bring remarkable economic efficiency; Roll the flexible fiber cement concrete and draw materials conveniently, construction is simple, quick.
Four, description of drawings
Further specify the utility model below in conjunction with accompanying drawing.
Accompanying drawing is the road structure schematic cross-sectional view.
Among the figure, 1---surface layer 2---rolls flexible fiber cement concrete pavement basic unit 3---bottom
Five, the specific embodiment
As shown in drawings, at bottom 3 surperficial making flexible fiber cement concretes, roll flexible fiber cement concrete pavement basic unit 2 through rolling to form, and then rolling making surface layer 1 in the flexible fiber cement concrete pavement basic unit 2.
Claims (1)
1, a kind of road structure that rolls the flexible fiber cement concrete as basic unit, include surface layer (1), roll flexible fiber cement concrete pavement basic unit (2), bottom (3), it is characterized in that rolling flexible fiber cement concrete pavement basic unit (2), rolling upward making surface layer (1) of flexible fiber cement concrete pavement basic unit (2) then at the surperficial making of bottom (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201639070U CN201003133Y (en) | 2006-12-30 | 2006-12-30 | Rolled flexible fiber cement concrete as foundation pavement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201639070U CN201003133Y (en) | 2006-12-30 | 2006-12-30 | Rolled flexible fiber cement concrete as foundation pavement structure |
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| Publication Number | Publication Date |
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| CN201003133Y true CN201003133Y (en) | 2008-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2006201639070U Expired - Fee Related CN201003133Y (en) | 2006-12-30 | 2006-12-30 | Rolled flexible fiber cement concrete as foundation pavement structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499397A (en) * | 2014-12-12 | 2015-04-08 | 东南大学 | Asphalt pavement structure based on coordination of deformation of subgrade and pavement |
-
2006
- 2006-12-30 CN CNU2006201639070U patent/CN201003133Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499397A (en) * | 2014-12-12 | 2015-04-08 | 东南大学 | Asphalt pavement structure based on coordination of deformation of subgrade and pavement |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: CO-PATENTEE TO: MA YINHUA YANG QINGGUO HE XIAOBING ^ |
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| CU01 | Correction of utility model patent |
Correction item: Co-patentee Correct: Ma Yinhua|Yang Qingguo|He Xiaobing Number: 02 Page: The title page Volume: 24 |
|
| CU03 | Correction of utility model patent gazette |
Correction item: Co-patentee Correct: Ma Yinhua|Yang Qingguo|He Xiaobing Number: 02 Volume: 24 |
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| ERR | Gazette correction |
Free format text: CORRECT: CO-PATENTEE; FROM: NONE ^ TO: MA YINHUA YANG QINGGUO HE XIAOBING ^ |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |