CN204753292U - Spread structure with adding of black top layer on cement road surface - Google Patents

Spread structure with adding of black top layer on cement road surface Download PDF

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Publication number
CN204753292U
CN204753292U CN201520344106.3U CN201520344106U CN204753292U CN 204753292 U CN204753292 U CN 204753292U CN 201520344106 U CN201520344106 U CN 201520344106U CN 204753292 U CN204753292 U CN 204753292U
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China
Prior art keywords
cement
layer
bituminous mixture
mixture layer
road surface
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Expired - Fee Related
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CN201520344106.3U
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Chinese (zh)
Inventor
田耀刚
石帅锋
连城
郑敏楠
朱琳
李炜光
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Changan University
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Changan University
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Publication of CN204753292U publication Critical patent/CN204753292U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model relates to a spread structure with adding of black top layer on cement road surface, including the cement supercrust to reach the viscoplasticity tie coat, cement emulsified asphalt mortar layer and the bituminous mixture layer that up set gradually under following on the cement supercrust, wherein, the elastic modulus on cement emulsified asphalt mortar layer is between cement supercrust and bituminous mixture layer. The utility model discloses a set up the tie coat and the cement emulsified asphalt mortar layer of viscoplasticity, a the stress's compound road surface structure firmly bonds into bituminous mixture layer and cement supercrust, it makes the time spent tie coat and can consume partly energy in company with being out of shape to receive the horizontal thrust on the bituminous mixture layer, reduce the influence of horizontal force to the bituminous mixture layer, effectively avoid the bituminous mixture layer to peel off, and simultaneously, the elastic modulus on cement emulsified asphalt mortar layer is moderate, can play the transition effect two -layer, can evenly transmit the produced stress of driving load, effectively solve the stress concentration phenomenon.

Description

The overlay structure of repaving asphalt coat on a kind of cement pavement
[technical field]
The utility model belongs to road Re-paving transformation field, is specifically related to the overlay structure of repaving asphalt coat on a kind of cement pavement.
[background technology]
Cement concrete pavement is widely used due to features such as intensity are high, good stability, durability are strong, maintenance costs is low, 2014, in the middle of the road surface that China has mated formation, the proportion of total mileage of highway shared by asphalt concrete pavement is 19%, cement concrete accounting is 38%, is still the main road surface composition structure of highway in China so far.But due to large, the heavily loaded overloading ubiquity of vehicle flow, in addition large, the easy performance such as shrinkage cracking of cement concrete fragility, cause cement concrete pavement to occur the diseases such as crack, purt mud, hole and faulting of slab ends, have a strong impact on application life of cement concrete pavement and road-ability, safety.For the problem that cement concrete pavement highlights day by day, the mode (being commonly called as " changing black in vain ") overlaying bituminous mixture layer on cement concrete pavement is adopted to be used widely, its construction is simple, effectively can improve the functional performance of cement concrete pavement, increase the service life.
The cement concrete pavement overlaying bituminous mixture layer relates to rigidity, flexible two kinds of road structure forms, cement concrete and bituminous concrete have different modulus of elasticity, linear expansion coeffcient, the material properties such as poisson's ratio, when the temperature varies, due to the difference of material property, interface between bituminous mixture layer and Old cement road surface layer easily produces tensile stress, when interlayer adhesion is lower and when being less than tensile stress, namely Relative sliding can be there is in two interlayers, even cause bituminous mixture layer from cement pavement pull-up from, stressed to become two thin layers stressed by original overall to cause road surface, the pavement performance on road surface is deteriorated, be difficult to keep good working order, in addition, because Old cement concrete exists seam, make bituminous mixture layer very easily occur reflection crack over these locations, surface gathered water then can penetrate into interlayer by crack, when interface layer water resistance difference, moisture can invade basic unit further, under Vehicle Load, not only can wash away basic unit, produce purt slurry and destroy, but also meeting wet and soft foundation, the supporting capacity on road surface is declined.
Automobile start, bring to a halt or travel on acclive road time, the horizontal thrust of wheel to bituminous mixture layer is larger, asphalt surface course is easily made to produce the slide displacement of horizontal direction, and cement concrete pavement is as rigid structures, synchronously can not produce slide displacement, cannot with asphalt surface course integrally property structure resist horizontal thrust, cause asphalt surface course individual layer overburden stressed, finally cause overlaying rear road surface and again produce passing, loose and the disease such as to embrace.
[utility model content]
The purpose of this utility model is to overcome problems of the prior art, provides one can be overall stressed, the overlay structure of repaving asphalt coat on the cement pavement avoiding interlayer Relative sliding.
For above problem, the technical solution adopted in the utility model is:
Comprise cement road surface layer, and the viscoplasticity tack coat set gradually from the bottom up on cement road surface layer, cement emulsified asphalt mortar layer and bituminous mixture layer, wherein, the modulus of elasticity of cement emulsified asphalt mortar layer is between cement road surface layer and bituminous mixture layer.
The thickness of described bituminous mixture layer is 5 ~ 10cm, and void content is 4 ~ 6%.
Be provided with macadam between described cement emulsified asphalt mortar layer and bituminous mixture layer, and the upper end of macadam penetrates bituminous mixture layer, lower end penetrates cement emulsified asphalt mortar layer.
Thickness is provided with at micron-sized waterproofing course between described bituminous mixture layer and macadam.
Described waterproofing course adopts epoxy resin tackifier.
The upper surface concave-convex surface of described cement road surface layer, recess is wherein filled with the material identical with tack coat, forms transition zone.
The thickness of described tack coat is at 1 ~ 5mm.
Described tack coat adopts groove interface, the hole healant of adhesion strength >=0.6MPa.
Described cement emulsified asphalt mortar layer thickness is at 2 ~ 5cm.
Compared with prior art, the utility model has following useful technique effect:
The utility model is by arranging viscoelastic tack coat and cement emulsified asphalt mortar layer, thus by bituminous mixture layer and cement road surface layer secure bond stressed composite road surface structure in aggregates, the wherein caking property of tack coat excellence, deformability can enable the companion distortion of bituminous mixture layer when being subject to horizontal thrust effect by tack coat consume part energy, reduce horizontal force to the impact of bituminous mixture layer, effectively avoid bituminous mixture layer that excessive Relative sliding occurs and cause peeling off, simultaneously, the modulus of elasticity of cement emulsified asphalt mortar layer is moderate, its modulus of elasticity is between cement road surface layer and bituminous mixture layer, transitional function can be played at two interlayers, evenly can transmit the stress that traffic load produces, effective solution stress concentration phenomenon, and because adhesion stress is not enough when avoiding rigidity cement road surface layer directly to contact with flexible bituminous mixture layer, the not equal reason of modulus of elasticity and poisson's ratio produces passes, the diseases such as cracking.
Further, the utility model, by arranging macadam, cement emulsified asphalt mortar layer forms one deck matsurface, thus forms embedded squeezing structure with bituminous mixture layer, improves frictional resistance and the adhesion stress of cement emulsified asphalt mortar layer and bituminous mixture layer.
Further, the utility model, by arranging waterproofing course, can prevent the erosion of moisture, improves anti-water damage ability of the present utility model.
Further, the utility model, by forming transition zone, increases the contact area of cement pavement and tack coat, effectively can improve the adhesion stress between cement road surface layer and tack coat, avoids peeling off.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present utility model.
Wherein, 1-bituminous mixture layer; 2-waterproofing course; 3-macadam; 4-cement emulsified asphalt mortar layer; 5-tack coat; 6-cement road surface layer.
[detailed description of the invention]
Below in conjunction with accompanying drawing, the utility model is described in further details.
The utility model comprises the cement road surface layer 6, tack coat 5, cement emulsified asphalt mortar layer 4, macadam 3, waterproofing course 2 and the bituminous mixture layer 1 that set gradually from the bottom up; Wherein form certain construction depth at cement road surface layer 6 upper surface through wharf's pavement quality, and uniform application cheats groove interface healant in the above, thus form transition zone, effectively can improve adhesion stress; By arranging bituminous mixture layer 1 as overlay above cement road surface layer 6, bituminous mixture layer 1 material therefor is AC-16 type bituminous concrete, thickness is 5cm, and void content is 4%, and arranges the tack coat 5 with excellent caking property, ultimate deformation ability between.
Tack coat 5 in the utility model be by the Jin Oute board of adhesion strength >=0.6MPa or doubly the auspicious board of good fortune cheat groove interface healant and formed, it all has caking property and the deformability of excellence; Or adopt following raw material: comprise 20 ~ 60 parts, dry powder, modified emulsifying asphalt 100 parts, silicon rubber emulsion 20 ~ 40 parts and polyurethane modified epoxy resin material 10 ~ 30 parts.Wherein, dry powder is mixed together by following material: cement 100 parts; Expansion agent 20 ~ 30 parts; Demulsifier 1.0 ~ 1.5 parts; Defoamer 1.0 ~ 2.0 parts, cement is Portland cement, fast hard sulfate cement compound gained, and Portland cement and fast hard sulfate cement mass ratio are 3:1, and expansion agent is HEA expansion agent, demulsifier is AR type demulsifier, and defoamer is polysiloxane defoamers; Modified emulsifying asphalt is SBS modified-high polymer mulseal; Silicon rubber emulsion is a kind of flexible water emulsion of cross-linking type; Polyurethane modified epoxy resin material is E-42 type polyurethane modified epoxy material.
The THICKNESS CONTROL of tack coat 5 at 1 ~ 5mm, preferred 1 ~ 2mm in the utility model; The caking property of tack coat 5 excellence, deformability can enable the companion distortion of bituminous mixture layer 1 when being subject to horizontal thrust effect by tack coat 5 consume part energy, reduce horizontal force to the impact of bituminous mixture layer 1, avoid bituminous mixture layer 1 that excessive Relative sliding occurs and cause peeling off.
Cement emulsified asphalt mortar in cement emulsified asphalt mortar layer 4 is called for short CA mortar, extensive use, and modulus circle is between bituminous mixture layer 1 and cement road surface layer 6, transitional function can be played between bituminous mixture layer 1 and cement road surface layer 6, because adhesion stress is not enough when avoiding rigidity cement road surface layer 6 directly to contact with flexible bituminous mixture layer 1, the not equal reason of modulus of elasticity and poisson's ratio produces passes, the diseases such as cracking, strengthen the bonding with tack coat 5, and there is good deformability, evenly can transmit the stress that traffic load produces, the stress concentration phenomenon that effective solution seam crossing produces.
Rubble spread is carried out rolling and is obtained certain construction depth and formed by macadam 3 on cement emulsified asphalt mortar layer 4, and rubble is simple grain footpath, and particle diameter is at 1.18 ~ 4.75mm, spread quantity 3 ~ 5m 3/ 1000m 2rubble part can be absorbed in cement emulsified asphalt mortar layer 4, partial denudation out forms the structure of certain construction depth, object is configured to one deck matsurface on cement emulsified asphalt mortar layer 4, thus form embedded squeezing structure with bituminous mixture layer 1, the upper end of final macadam 3 penetrates bituminous mixture layer 1, lower end penetrates cement emulsified asphalt mortar layer 4, frictional resistance and the adhesion stress of cement emulsified asphalt mortar layer 4 and bituminous mixture layer 1 can be improved, strengthen the bonding of cement emulsified asphalt mortar layer 4 and bituminous mixture layer 1, so stressed with overall structure.
Waterproofing course 2, material therefor is epoxy resin tackifier, good with levels phase permeability curve, play stronger cementation, and water proofing property can prevent by force the erosion of moisture, improve the anti-water damage ability overlaying structure, thickness is little simultaneously, for micron order, do not affect the bonding of tack coat 5 and bituminous mixture layer 1.
Construction technology of the present utility model mainly comprises: first check that old cement concrete road destroys situation, should repair in time the disease that old pavement occurs, remove road debris, and before smearing groove interface, hole healant, old pavement should keep clean; Wharf's pavement quality is carried out to Old cement concrete, the upper surface of cement road surface layer 6 is formed concavo-convex, and groove interface, uniform application hole healant forms tack coat 5, transition zone wherein between tack coat 5 and cement road surface layer 6 is that both are staggered formation, only in order to increase contact area, improve adhesion stress; The paving thickness of tack coat 5 controls at below 5mm, the cement emulsified asphalt mortar that should pave on upper strata immediately after having smeared forms cement emulsified asphalt mortar layer 4, and on cement emulsified asphalt mortar layer 4 synchronous spread rubble, roll and form macadam 3, cement emulsified asphalt mortar layer 4 thickness and macadam 3 ballast grain sizes, spread quantity can according to circumstances adjust, preferred cement emulsified asphalt mortar layer 4 thickness 2 ~ 5cm in the utility model, and macadam 3 ore particle diameter 1.18 ~ 4.75mm, spread quantity 3 ~ 5m 3/ 1000m 2, then spray waterproofing course 2, last decking and rolling bituminous mixture layer 1.By forming tack coat 5 by hole groove interface healant, formed cement emulsified asphalt mortar layer 4 by cement emulsified asphalt mortar, spread rubble forms macadam 3 and spray epoxy class bonding adhesive forms waterproofing course 2, thus by bituminous mixture layer 1 and cement road surface layer 6 secure bond stressed composite road surface structure in aggregates; The utility model construction technology is simple, and groove interface, hole used healant can cold mixing cold-application, without the need to heating, energy conservation, execution conditions do not affect by temperature and wet environment, when being particularly applied in area of heavy rainfull, effectively can reduce the erosion of rainwater to NEW TYPE OF COMPOSITE road structure.
Prove through overtesting, after vehicle repeatedly load action, tack coat 5 can consume portion of energy, cement emulsified asphalt mortar layer 4 evenly can transmit stress, play transitional function, macadam 3 improves and improves frictional resistance between cement emulsified asphalt mortar layer 4 and bituminous mixture layer 1 and adhesion stress, avoid bituminous mixture layer 1 thin layer stressed, make the utility model form overall stressed NEW TYPE OF COMPOSITE road structure.

Claims (9)

1. the overlay structure of repaving asphalt coat on a cement pavement, it is characterized in that: comprise cement road surface layer (6), and the viscoplasticity tack coat (5) set gradually from the bottom up on cement road surface layer (6), cement emulsified asphalt mortar layer (4) and bituminous mixture layer (1), wherein, the modulus of elasticity of cement emulsified asphalt mortar layer (4) is between cement road surface layer (6) and bituminous mixture layer (1).
2. the overlay structure of repaving asphalt coat on a kind of cement pavement according to claim 1, is characterized in that: the thickness of described bituminous mixture layer (1) is 5 ~ 10cm, and void content is 4 ~ 6%.
3. the overlay structure of repaving asphalt coat on a kind of cement pavement according to claim 1, it is characterized in that: between described cement emulsified asphalt mortar layer (4) and bituminous mixture layer (1), be provided with macadam (3), and the upper end of macadam (3) penetrates bituminous mixture layer (1), lower end penetrates cement emulsified asphalt mortar layer (4).
4. the overlay structure of repaving asphalt coat on a kind of cement pavement according to claim 3, is characterized in that: be provided with thickness between described bituminous mixture layer (1) and macadam (3) in micron-sized waterproofing course (2).
5. the overlay structure of repaving asphalt coat on a kind of cement pavement according to claim 4, is characterized in that: described waterproofing course (2) adopts epoxy resin tackifier.
6. the overlay structure of repaving asphalt coat on a kind of cement pavement according to claim 1, it is characterized in that: the upper surface concave-convex surface of described cement road surface layer (6), recess is wherein filled with the material identical with tack coat (5), forms transition zone.
7. the overlay structure of repaving asphalt coat on a kind of cement pavement according to claim 1, is characterized in that: the thickness of described tack coat (5) is at 1 ~ 5mm.
8. the overlay structure of repaving asphalt coat on a kind of cement pavement according to claim 1 or 7, is characterized in that: described tack coat (5) adopts groove interface, the hole healant of adhesion strength >=0.6MPa.
9. the overlay structure of repaving asphalt coat on a kind of cement pavement according to claim 5, is characterized in that: described cement emulsified asphalt mortar layer (4) thickness is at 2 ~ 5cm.
CN201520344106.3U 2015-05-25 2015-05-25 Spread structure with adding of black top layer on cement road surface Expired - Fee Related CN204753292U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109944124A (en) * 2019-04-04 2019-06-28 佛山市公路桥梁工程监测站有限公司 A kind of Combined base bituminous pavement method for paving
CN110644319A (en) * 2019-09-11 2020-01-03 江苏现代工程检测有限公司 Method for treating transverse cracks of asphalt pavement
CN113322743A (en) * 2021-06-03 2021-08-31 重庆诚邦路面材料有限公司 Epoxy modified cement pavement anti-skid wearing layer and construction method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109944124A (en) * 2019-04-04 2019-06-28 佛山市公路桥梁工程监测站有限公司 A kind of Combined base bituminous pavement method for paving
CN110644319A (en) * 2019-09-11 2020-01-03 江苏现代工程检测有限公司 Method for treating transverse cracks of asphalt pavement
CN113322743A (en) * 2021-06-03 2021-08-31 重庆诚邦路面材料有限公司 Epoxy modified cement pavement anti-skid wearing layer and construction method thereof

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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

Granted publication date: 20151111

Termination date: 20160525

CF01 Termination of patent right due to non-payment of annual fee