CN101855404A - Method of continuously repaving asphalt mixture layer of paved road in-situ and self-propelled vehicle system therefor - Google Patents

Method of continuously repaving asphalt mixture layer of paved road in-situ and self-propelled vehicle system therefor Download PDF

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Publication number
CN101855404A
CN101855404A CN200880115775A CN200880115775A CN101855404A CN 101855404 A CN101855404 A CN 101855404A CN 200880115775 A CN200880115775 A CN 200880115775A CN 200880115775 A CN200880115775 A CN 200880115775A CN 101855404 A CN101855404 A CN 101855404A
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asphalt mixtures
layer
particle diameter
new material
aggregate
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CN101855404B (en
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笠原笃
后藤文夫
五味笃树
奥野隆
国岛武史
尹恢允
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GREEN ARM Co
Hitachi Construction Machinery Co Ltd
Sumitomo SHI Construction Machinery Sales Co Ltd
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GREEN ARM Co
Hitachi Construction Machinery Co Ltd
Sumitomo SHI Construction Machinery Sales Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/065—Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Repair (AREA)
  • Road Paving Structures (AREA)
  • Road Paving Machines (AREA)

Abstract

Provided is a method of continuously repaving the asphalt mixture layer of a paved road in-situ while driving a self-propelled vehicle system. Also provided is a self-propelled vehicle system for the method. The method comprises: a step in which the surface of an asphalt mixture layer is heated to conduct the heat to a given depth and soften the layer down to the depth; a step in which the asphalt mixture layer is scraped down to the given depth to give an old asphalt mixture; a step in which a large-diameter aggregate having been stored is added to the old asphalt mixture; a step in which the old asphalt mixture to which the large-diameter aggregate has been added is converted to a reinforced asphalt mixture; a step in which the reinforced asphalt mixture is spread on the residual asphalt mixture layer and the surface is leveled to form a reinforced layer having a higher coefficient of elasticity than the residual layer; a step in which an asphalt mixture for a new surface layer which has been stored is placed on the reinforced layer; a step in which the asphalt mixture for a new surface layer is spread and leveled to form a new surface layer; and a step in which the reinforced layer and the new surface layer are compacted, in the hot state, and united with each other.

Description

Re-lay continuously on the road surface road of mating formation the asphalt mixtures layer method and be used for the self-propelled vehicle system of this method
Technical field
The present invention relates to re-lay continuously on the road surface road of mating formation the asphalt mixtures layer method and be used for the self-propelled vehicle system of this method.Particularly, the surface of heating asphalt mixtures layer, make heat leak to the degree of depth of the boundary face between basic unit that surmounts the asphalt mixtures layer and the top layer or be equivalent to this degree of depth the asphalt mixtures layer the degree of depth and soften, and it scarifying formed old asphalt mixtures, add the aggregate of big particle diameter or be attached with the aggregate of pitch to this old asphalt mixtures, perhaps contain the new material arbitrarily in the asphalt mixtures of size distribution of big diameter aggregate, by it mixing is formed the reinforcement asphalt mixtures, afterwards to scarifying asphalt mixtures layer and the even reinforcement asphalt mixtures in remaining rest layers upper berth, make that contain coefficient of elasticity forms big particle diameter strengthening course greater than the intermediate layer of the big diameter aggregate of the coefficient of elasticity of rest layers, on this big particle diameter strengthening course, add and the shop is even is used for the asphalt mixtures on new top layer and forms new top layer, big particle diameter strengthening course of one compacting and new top layer under the accumulation of heat state.
Background technology
Mat formation road because vertical and the compression of horizontal direction and the bending of tensile stress due to the frequent traffic of vehicle, crackle or sinking such as can split.Given this, as shown in Figure 1, the road of mating formation forms the 3-tier architecture that is made of roadbed, roadbed and asphalt mixtures layer usually.More specifically, as shown in Figure 2, be provided with two-layer roadbed on solid roadbed, this roadbed is at sand and rubble as the pitch paver, promptly adds stabilizing agent such as cement or petroleum tar emulsion in the aggregate and becomes solid.From the viewpoint of intensity, each layer of the thickness on lower floor and upper strata is about 10～35cm, and integral thickness reaches 20～70cm.On described roadbed, the basic unit and the top layer of asphalt mixtures is set usually massively, by the interlayer adhesives to form the asphalt mixtures layer.
What is called is mated formation and is meant 4 layers of structure that are made of " roadbed+asphalt mixtures layer ".The asphalt mixtures layer generally is 2 layers of structure that are made of basic unit and top layer, and the thickness of each layer is about 4～5cm, makes durable in vehicular traffic.From the viewpoint of durability, the laying depth of the road of mating formation is determined according to the intensity (CBR value) and the traffic volume (N value) of roadbed.In addition, each layer thickness of roadbed or asphalt mixtures layer is typically designed to about 2～3 times of maximum particle diameter of contained aggregate separately.That is, when the maximum particle diameter of the aggregate in being included in the asphalt mixtures layer was about 20mm, the Thickness Design of each layer was into about 4～5cm, and integral body reaches 8～10cm approximately.
But, this is also according to required character and state, the maximum particle diameter aggregate that will be included in the size distribution on about 4～5cm top layer sometimes is formed on the close granularity layers of about 13mm, the maximum particle diameter aggregate of size distribution that is included in the basic unit of same thickness is formed on the crude density layer of about 20mm.And the thickness of basic unit is set to corresponding to the number of the traffic volume has elastic force.For this reason, be the thickness setting of basic unit 4～35cm sometimes.Detailed will be in the back narration, mat formation model and section thereof shown in Figure 15 (1) are typical case.Figure 15 (1) is used for multilayer elastic to resolve (GAMCS: standard, that be applicable to arterial road (national highway, land-service road) the in Japan model of mating formation building association of civic organization).For paving structure, roadbed that the upper strata by the lower floor of 35cm and 25cm constitutes is set and the asphalt mixtures layer that constitutes by the basic unit of the top layer of 5cm and 12cm and constituting on roadbed.This belongs to the situation that the traffic volume is divided into C traffic (1000～3000/day, direction), is used to represent the coefficient of elasticity of distortion repellence of each layer of roadbed and asphalt mixtures layer, and promptly restoring force (E) is as shown in the table of Figure 15 (1).
At this, re-laying of asphalt mixtures layer is described.
Basic unit and top layer are by constituting as the aggregates such as pitch, sand and rubble of cementing agent (binding material), the stone flour (filler) that conduct is used to bury underground the limestone powder in gap between the aggregate.Common composition is that aggregate is about 90%, is about 5～8% as the pitch of cementing agent, and remaining be filler.
The size of aggregate particle is called granularity, and the result who carries out classification after the sieve screening of state with all size with its mixing is called size distribution, and Fig. 3 shows its example.In the chart, transverse axis is represented the size of sieve mesh, and the longitudinal axis is represented by the weight percent of the material of all size sieve mesh (passing through weight percent).
In addition, comprise: give birth to, i.e. the pitch crossed of upgrading not as the pitch of the cementing agent (binding material) of aggregate; With the upgrading pitch that is added with modification agents such as rubber, resin in order to improve viscosity.The relation of observing temperature shown in Figure 4 and viscosity as can be known, above-mentioned two kinds of pitch are reduced viscosity when 180 ℃ of left and right sides all, under the situation of not destroying aggregate, makes the aggregate of asphalt mixtures disperse.That is, aggregate becomes simple grainization with the state that is covered by pitch.On the other hand, along with temperature drops to 100 ℃, the viscosity of pitch can improve, and the aggregate that is covered by pitch begins to become granuleization, is cured fully when normal temperature.
As shown in Figure 1, mat formation road owing to bear vertical and the compression of horizontal direction and the bending of tensile stress due to the frequent traffic of vehicle for a long time, and the road surface damaged, and be exposed under wind and rain or the outside air temperature, " rut seal depression " according to the softening or liquidation of pitch, cementing agent typically can take place, or the crackle due to freezing etc., the road surface becomes uneven and deterioration.Mat formation general the employing in the basic unit and top layer of the asphalt mixtures layer that constitutes 2 layers of structure of pavement recycling worker method of road is only at the heated type pavement recycling worker method (HIR:Hot In-place Recycling) of the top layer part of about 4～5cm.
Particularly, a kind of is mixing again (Re-mixture) mode shown in Fig. 5 (1).This mode, the top layer part of scarifying asphalt mixtures layer by thermoplastic, make it to become asphalt mixtures, and on this asphalt mixtures, add and mixed regeneration agent and new asphalt mixtures and make it to become the recovered asphalt mixture, pave afterwards and the described recovered asphalt mixture of compacting, thereby regenerate on the top layer of recovered asphalt mixture layer.
Another kind is the road crust regeneration shown in Fig. 5 (2).This mode, the top layer part of scarifying asphalt mixtures layer by thermoplastic, make it to become asphalt mixtures, and on this asphalt mixtures, only add and mixed regeneration agent and paving, after the top layer with the recovered asphalt mixture layer, add new asphalt mixtures on this top layer and pave and compacting, thereby make the top layer of asphalt mixtures layer form two-layer.Obviously, the asphalt mixtures layer after the regeneration is compared before the regeneration, and its thickness increases.Point out that in passing the advantage of heated type pavement recycling worker method is, under any circumstance also can not destroy the aggregate that is included in the asphalt mixtures layer, and by being used to regeneration again and strengthening the asphalt mixtures layer.
Nonetheless, the mat formation crackle of road or damage also comprises from the boundary face of interlayer and takes place and spread situation to top successively, under many situations, as observed, crackle or damage spread from the road surface to the top layer that surpasses about 6～10cm and the degree of depth of the boundary face between the basic unit, or corresponding to the degree of depth of the asphalt mixtures layer of this degree of depth.Be used in the road surface heating means of well-known pavement recycling worker methods such as aforesaid hybrid mode again or road crust regeneration, that heat energy enough is penetrated under the situation of not lighting at short notice, restricted apart from the degree of depth on road surface, so its applicable object is limited at top layer or its part.Thereby, when using these pavement recyclings worker method, the degree of depth of the basic unit of asphalt mixtures layer part or corresponding to this degree of depth, be positioned at apart from the crackle of the road of mating formation of road surface 6～10cm degree of depth or damage by under the situation of a residual part top layer part of a recovered asphalt mixture.
In addition, at United States Patent (USP) the 4th, 534, put down in writing following mode in No. 674 manuals, promptly be conceived to repair the crackle of the road of mating formation or damage, hybrid mode is applicable to the mode of road crust regeneration again, particularly, appends the pitch regenerative agent in the asphalt mixtures of scarifying, and add the new asphalt mixtures of heated condition and mix and pave, thereby form new top layer.And even in this case, the degree of depth that can repair existing asphalt mixtures layer is by the end of 5cm to 6cm, and its degree of depth is still restricted.In any case, the life-span of the road of mating formation of regeneration is temporary, at the degree of depth of the basic unit of the asphalt mixtures layer that surmounts the road of mating formation and the boundary face between the top layer or corresponding to the degree of depth apart from road surface 6～10cm of this degree of depth, be difficult in that the mode by cyclic regeneration thoroughly changes the life-span on the road surface, up to the present, the road of mating formation of this character and state can only depend on for example rebuilding (reconstruct) worker method.
The application's applicant discloses following heating means and device in No. the 4024293rd, Japan Patent, promptly, be used in the road surface heater of the hot blast of 600～700 ℃ of the jet surfaces of asphalt mixtures layer moving, the surface temperature on road surface is remained on about 250 ℃, do not light at short notice and can make heat leak to the degree of depth of the boundary face between basic unit that surmounts the asphalt mixtures layer and the top layer or be equivalent to the degree of depth of the asphalt mixtures of this degree of depth under the situation of pitch, thus on the road surface cyclic regeneration asphalt mixtures layer.The applicant utilizes this heating means and device, at arriving to the degree of depth of the boundary face between basic unit that surmounts the asphalt mixtures layer and the top layer or being equivalent to the damage or the deterioration of the degree of depth of the asphalt mixtures layer of this degree of depth, conscientiously examined the realization that re-lays worker's method that can significantly improve the road life of mating formation.
Non-patent literature 1: " the regeneration brief guide of mating formation " (civic organization Japan road association)
Patent documentation 1: No. 4024293 communique of Japan Patent
Patent documentation 2: United States Patent (USP) the 4th, 534, No. 674 manuals
Summary of the invention
Pitch is made of the asphaltene (asphaltene) of particulate component and the malthenes (malthene) of oil component.If mat formation by deterioration, then the malthenes of oil component reduces and hardens, and the ratio of the particulate component asphaltene in malthenes that swims can increase.Its result, the viscosity of pitch can descend.At this, the top layer has identical characteristic with basic unit, just the degree difference.And according to the deterioration of mating formation, the aggregate that is included in the asphalt mixtures layer can take place to reduce or breakage owing to abrasion.The object that will be used as old material as the asphalt mixtures of the generating material of mating formation and utilize preferably should be the asphalt mixtures layer that comprises the integral body of top layer and basic unit.
Utilize above-mentioned heating means and device, promptly at short notice, make heat leak to the degree of depth of the boundary face between basic unit that surmounts the asphalt mixtures layer and the top layer or be equivalent to the degree of depth of the asphalt mixtures layer of this degree of depth under the situation of not lighting pitch, thereby make heat leak to the degree of depth of the degree of depth of the boundary face between basic unit that surmounts the asphalt mixtures layer and the top layer or suitable therewith about 6～10cm and soften, with this as shown in Figure 6, to scarifying to the degree of depth that surmounts the boundary face between basic unit and the top layer or be equivalent to the asphalt mixtures of this degree of depth, not only add the pitch regenerative agent, but also add the aggregate of big particle diameter or be attached with the aggregate of pitch, perhaps contain certain new material in the asphalt mixtures of size distribution of big diameter aggregate, and and after constituting the reinforcement asphalt mixtures with it mixing, on the rest layers of the remaining asphalt mixtures layer of scarifying, the even reinforcement asphalt mixtures in shop, thus coefficient of elasticity formed greater than the rest layers of asphalt mixtures layer and contain the intermediate layer of big diameter aggregate.At this, the intermediate layer of containing big diameter aggregate is called " big particle diameter strengthening course ".Then, be included in also that big particle diameter strengthening course upper berth is even to be used for the asphalt mixtures on new top layer and to form new top layer, and both compactings that will be in the accumulation of heat state are the step of one, the object of the present invention is to provide the aforesaid self-propelled vehicle system that re-lays the method for asphalt mixtures layer and be used for this method.
Above-mentioned problem realizes with the present invention with technical characterictic described later based on following opinion.Promptly; by making self-propelled vehicle system voluntarily; the surface of heating asphalt mixtures layer; make heat leak to the thickness of the boundary face between basic unit that surmounts the asphalt mixtures layer and the top layer or be equivalent to this thickness described asphalt mixtures layer thickness and soften; and to carrying out scarifying and make it to become old asphalt mixtures until the degree of depth of the boundary face between basic unit that surmounts the asphalt mixtures layer and the top layer or till being equivalent to the degree of depth of described asphalt mixtures layer of this degree of depth; add with not by the temperature pre-stored of granuleization to this asphalt mixtures; the aggregate of big particle diameter or be attached with the aggregate of pitch; perhaps contain any first material in the asphalt mixtures of size distribution of big diameter aggregate; and mix and form the reinforcement asphalt mixtures; to the even described reinforcement asphalt mixtures in the rest layers upper berth of the remaining asphalt mixtures layer of scarifying; to form the big particle diameter strengthening course of coefficient of elasticity greater than the coefficient of elasticity of rest layers; add with not by i.e. second new material of the asphalt mixtures that is used to form new top layer of the temperature pre-stored of granuleization to this big particle diameter strengthening course again; and the shop is spared this second new material and is formed new top layer; with big particle diameter strengthening course of accumulation of heat state one compacting and new top layer, can on the road surface, re-lay the asphalt mixtures layer of the road of mating formation in view of the above continuously.
The invention that is recorded in claim 1 is by making self-propelled vehicle system voluntarily, the asphalt mixtures layer of road of will mating formation repaves the method for being located at the road surface continuously, it is characterized in that described method comprises: (a) thermoplastic step, heat the surface of described asphalt mixtures layer, make heat leak to the degree of depth of the boundary face between basic unit that surmounts described asphalt mixtures layer and the top layer or be equivalent to this degree of depth described asphalt mixtures layer the degree of depth and soften; (b) scarifying step, to surmount be heated and the degree of depth of the described boundary face of softening described asphalt mixtures or be equivalent to the degree of depth of described asphalt mixtures layer of this degree of depth till carry out scarifying and form old asphalt mixtures; (c) first adds step, to described old asphalt mixtures through scarifying, interpolation to be to be pre-stored in the aggregate of particle diameter in the pre-cryopreservation device, big by the temperature of granuleization or to be attached with the aggregate of pitch, perhaps contains any first new material in the asphalt mixtures of size distribution of big diameter aggregate; (d) blend step mixes the described old asphalt mixtures that is added with described first new material, and forms the reinforcement asphalt mixtures; (e) big particle diameter strengthening course forms step, in described scarifying step by scarifying after on the rest layers of remaining described asphalt mixtures layer, the even described reinforcement asphalt mixtures in shop is to form the big particle diameter strengthening course of coefficient of elasticity greater than the coefficient of elasticity of described rest layers; (f) second adds step, on formed described big particle diameter strengthening course, adds not to be pre-stored in asphalt mixtures in the pre-cryopreservation device, that be used to form new top layer, i.e. second new material by the temperature of granuleization; (g) new top layer forms step, and the shop is spared described second new material and formed new top layer, and this step forms step with described big particle diameter strengthening course and is associated; (h) compacting step, under the accumulation of heat state, the one compacting is formed on described big particle diameter strengthening course and the described new top layer on the described rest layers.
The invention that is recorded in claim 2 is the invention of appending following feature on the feature of invention as claimed in claim 1, promptly, it is characterized in that also comprising before described scarifying step: new material is moved into step, with described first new material and described second new material that be transported into outside the described self-propelled vehicle system different opportunitys, move into respectively in the pre-cryopreservation device on described different opportunitys.
The invention that is recorded in claim 3 is the invention of appending following feature on the feature of invention as claimed in claim 1 or 2, that is, it is characterized in that described first new material is that the aggregate of comparing the maximum particle diameter that is included in described asphalt mixtures layer has the aggregate of bigger particle diameter or is attached with the aggregate of pitch or contains in the asphalt mixtures of size distribution of the bigger aggregate of the aggregate particle diameter of comparing the maximum particle diameter that is included in described asphalt mixtures layer any one.
The invention that is recorded in claim 4 is the invention of appending following feature on the feature as any described invention in the claim 1 to 3, promptly, it is characterized in that being added with the described reinforcement asphalt mixtures of described first new material, include the aggregate that the aggregate that will compare the maximum particle diameter that is included in described asphalt mixtures layer has bigger particle diameter, its content is for comprising about 5%～35% on the whole.
The invention that is recorded in claim 5 is the invention of appending following feature on the feature as any described invention in the claim 1 to 4, promptly, it is characterized in that described blend step also comprises: regenerative agent adds step, when the described old asphalt mixtures that is added with described first new material is mixed, add the pitch regenerative agent.
The invention that is recorded in claim 6 is the invention of appending following feature on the feature as any described invention in the claim 1 to 5, that is, it is characterized in that described second new material contains and the aggregate that is included in the size distribution that aggregate the had size distribution much at one of described asphalt mixtures layer.
The invention that is recorded in claim 7 is the invention of appending following feature on the feature as any described invention in the claim 1 to 6, promptly, it is characterized in that described big particle diameter strengthening course forms step and also comprises: the interlayer bonding step, scatter pitch emulsion or be used to improve the material of water proofing property and cementability to described rest layers, thus bonding described rest layers and described big particle diameter strengthening course.
The invention that is recorded in claim 8 is to be used for the asphalt mixtures layer of the road of mating formation is repaved the self-propelled vehicle system of being located at the road surface continuously, it is characterized in that comprising: preheating vehicle (A), this preheating vehicle (A) comprises heater, the mat formation surface of described asphalt mixtures layer of road of this heater heating, make heat leak to the degree of depth of the boundary face between basic unit that surmounts described asphalt mixtures layer and the top layer or be equivalent to this degree of depth described asphalt mixtures layer the degree of depth and soften; Milling vehicle (B), this milling vehicle (B) comprises: first tank, with big diameter aggregate or be attached with the aggregate of pitch, perhaps contain any first material in the asphalt mixtures of size distribution of big diameter aggregate, not stored by the temperature of granuleization; The scarifying device, until surmount be heated and the degree of depth of the described boundary face of softening described asphalt mixtures layer or be equivalent to the degree of depth of asphalt mixtures layer of this degree of depth till carry out scarifying, thereby make it to become old asphalt mixtures; First adding set, with discharge from described first tank, add described old asphalt mixtures to described first new material of not stored by the temperature of granuleization; Stir vehicle (C), this stirrings vehicle (C) comprising: second tank is second new material with the asphalt mixtures that is not used to form new top layer by the temperature pre-stored of granuleization; Mixing arrangement receives and mixes the described old asphalt mixtures that is added with described first new material, to form the reinforcement asphalt mixtures; First ironing machine, on the rest layers of remaining described asphalt mixtures layer, the even described reinforcement asphalt mixtures in shop is to form the big particle diameter strengthening course of coefficient of elasticity greater than the coefficient of elasticity of described rest layers after by the scarifying of described scarifying device; Second adding set, on formed described big particle diameter strengthening course, add discharge from described second tank, with not by described second new material of the temperature pre-stored of granuleization; Second ironing machine that is associated with first ironing machine is used to spread even described second new material that adds, to form new top layer.
The invention that is recorded in claim 9 is the invention of appending following feature on the feature of invention as claimed in claim 8, promptly, it is characterized in that also comprising Roller compaction device (D), be formed on the described big particle diameter strengthening course on the described rest layers and be formed on described new top layer on this big particle diameter strengthening course with the state one compacting of accumulation of heat.
The invention that is recorded in claim 10 is the invention of appending following feature on the feature of invention as claimed in claim 8 or 9, promptly, it is characterized in that described milling vehicle (B) also comprises: discharger is gone in a centre, receives and discharge described first new material and described second new material that are transported into outside the described self-propelled vehicle system on different opportunitys; The new material that comprises at least two continuous transport paths is moved into device, has switching device shifter on the described transport path, to be used for moving into described first new material and described second new material of being gone into the discharger discharge from described centre to described first tank and described second tank respectively on described different opportunitys; Wherein, when described first new material being gone into discharger from described centre when moving into described first tank, continuous two transport paths that described switching device shifter makes described new material move into device cut off and form and move into mouth, by the formed described mouth of moving into described first new material is moved into described first tank, and when described second new material being gone into discharger from described centre when moving into described second tank, described switching device shifter cuts out and is formed on the described mouth of moving into that described new material is moved into device, thereby connect described two transport paths and form a transport path, make described second new material be gone into discharger from described centre thus and move into described second tank via a described transport path.
The invention that is recorded in claim 11 is the invention of appending following feature on the feature as any described invention in the claim 8 to 10, that is, it is characterized in that described first new material is that the aggregate of comparing the maximum particle diameter that is included in described asphalt mixtures layer has the aggregate of bigger particle diameter or is attached with the aggregate of pitch or contains in the asphalt mixtures of size distribution of the bigger aggregate of the aggregate particle diameter of comparing the maximum particle diameter that is included in described asphalt mixtures layer any one.
The invention that is recorded in claim 12 is the invention of appending following feature on the feature as any described invention in the claim 8 to 11, promptly, it is characterized in that being added with the described reinforcement asphalt mixtures of described first new material, include the aggregate that the aggregate that will compare the maximum particle diameter that is included in described asphalt mixtures layer has bigger particle diameter, its content is for comprising about 5%～35% on the whole.
The invention that is recorded in claim 13 is the invention of appending following feature on the feature as any described invention in the claim 8 to 12, that is, it is characterized in that described second new material contains and the aggregate that is included in the size distribution that aggregate the had size distribution much at one of described asphalt mixtures layer.
The invention that is recorded in claim 14 is the invention of appending following feature on the feature as any described invention in the claim 8 to 13, promptly, it is characterized in that described stirring vehicle (C) also comprises the regenerative agent adding set, to be used for when being added described first new material by the described old asphalt mixtures of scarifying, adding the pitch regenerative agent.
The invention that is recorded in claim 15 is the invention of appending following feature on the feature as any described invention in the claim 8 to 14, promptly, it is characterized in that described stirring vehicle (C) also comprises the 3rd tank, to be used for the material that pre-stored is used for the pitch emulsion of bonding described rest layers and described big particle diameter strengthening course or is used to improve water proofing property and cementability.
The invention that is recorded in claim 16 is the invention of appending following feature on the feature as any described invention in the claim 8 to 15, promptly, it is characterized in that described stirring vehicle (C) also comprises first memory space that is formed between described mixing arrangement and described first ironing machine, to be used to regulate the quantity delivered of the described reinforcement asphalt mixtures that is provided to described rest layers.
The invention that is recorded in claim 17 is the invention of appending following feature on the feature as any described invention in the claim 8 to 16, promptly, it is characterized in that described stirring vehicle (C) also comprises second memory space that is formed between described first ironing machine and described second ironing machine, to be used to regulate the quantity delivered of described second new material that is provided to described big particle diameter strengthening course.
Description of drawings
Fig. 1 is used to represent that heavy traffic brings the model of the influence that pitch mats formation.
The profile that Fig. 2 mats formation for general pitch.
Fig. 3 is the particle size distribution figure of the aggregate of asphalt mixtures.
Fig. 4 is the graph of a relation of the temperature and the viscosity of pitch.
Fig. 5 is used to represent the hybrid mode again (1) of heated type road crust regeneration operation and the figure of regeneration (2).
Fig. 6 for according to of the present invention by being formed for the big particle diameter strengthening course of reinforcement asphalt mixtures layer, the model that re-lays continuously with road surface at the road of mating formation.
Fig. 7 is the block diagram according to the asphalt mixtures layer that re-lays the road of mating formation on the road surface continuously of the embodiment of the invention.
Fig. 8 is the skeleton diagram of self-propelled vehicle system of asphalt mixtures layer that is used for re-laying continuously the road of mating formation on the road surface according to the embodiment of the invention.
Fig. 9 is the probability graph of heater body 100 of preheating vehicle A that is used to constitute self-propelled vehicle system according to the embodiment of the invention.
Figure 10 is formed with the skeleton diagram of the device body of moving into mouthful 300 of first new material for the milling vehicle B that is used for constituting self-propelled vehicle system according to the embodiment of the invention.
Figure 11 is for being formed with the skeleton diagram of the device body of moving into device 300 of second material according to the milling vehicle B that is used for constituting self-propelled vehicle system of the embodiment of the invention.
Figure 12 is the skeleton diagram of the device body 300 that is made of other dual link vehicle according to the milling vehicle B that is used for constituting self-propelled vehicle system of the embodiment of the invention.
Figure 13 is the skeleton diagram of heater body 500 of stirring vehicle C that is used to constitute self-propelled vehicle system according to the embodiment of the invention.
Figure 14 is size distribution analysis result and the particle size distribution figure that cooperates the aggregate of " No. 4 quarrying " new material to the asphalt mixtures of the part (thickness is 2cm) of top layer (thickness is 4cm) and basic unit with 7 to 3 ratio.
Figure 15 is standard the mat formation paving structure and the multilayer tomography analysis result of model.
Paving structure and multilayer tomography analysis result that Figure 16 regenerates with the new asphalt mixtures with aggregate size distribution much at one for the top layer of the paving structure of model that standard is mated formation.
Figure 17 be for will surmounting standard the mat formation top layer of paving structure of model and the asphalt mixtures layer of the boundary face 10cm degree of depth between the basic unit, the paving structure and the multilayer tomography analysis result that re-lay with method of the present invention.
Figure 18 is the synoptic diagram that is used for the comparison paving structure.
Figure 19 is the sequence of operation figure of preparation method of model of mating formation.
Figure 20 compressive strain that to be the testing machine that utilizes defined in the crooked test of concrete undertaken by load such as 3 branch points such as grade and the test synoptic diagram of stretcher strain.
Figure 21 resolves the measured value that compares test for two-layer model and the paving structure that contains the three layer model of big particle diameter strengthening course to existing worker's method based on the multilayer tomography.
Figure 22 illustrates the figure that is used in paving structure test, the full scale test body of mating formation that carries out according to the reinforcing effect of mating formation of big particle diameter strengthening course for quantitative assessment.
Figure 23 is used to illustrate the figure of quality test content of test body of mating formation.
Figure 24 is when being illustrated in the fatigue failure number of times that calculates the test body of mating formation, and is used to calculate the figure of the calculating formula of the position of stretcher strain and compressive strain and fatigue failure number of times.
Figure 25 is result's the figure that the quality test of the test body of mating formation is shown.
Figure 26 illustrates the figure that tests the surperficial displacement of mating formation of body according to mating formation of FWD test.
Figure 27 illustrates utilization at the mat formation figure of coefficient of elasticity of the asphalt mixtures that the test test body that employed material is made during body measures of construction.
Figure 28 is the figure that the value of mat formation test stretcher strain of body and compressive strain is shown.
Figure 29 illustrates being recorded in mat formation the plan traffic volume of design and construction in the guide and the relation between the fatigue failure number of times, and value that will stretcher strain shown in Figure 28 and compressive strain is updated to the figure of the fatigue failure number of times that respectively mating formation of acquisition in the calculating formula shown in Figure 24 test body.
The specific embodiment
Below, the asphalt mixtures layer that describes the road of will mating formation according to the preferred embodiment of the invention with reference to Fig. 7 to Figure 21 in detail repaves the method for being located at the road surface and the self-propelled vehicle system that is used for this method continuously.
Fig. 7 shows the whole step that repaves the method for being located at the road surface according to the asphalt mixtures layer of the road of will mating formation of the embodiment of the invention continuously.This method comprises: thermoplastic step (hereinafter referred to as " thermoplastic step "), the surface of heating asphalt mixtures layer, make heat leak to the degree of depth of the boundary face between basic unit that surmounts the asphalt mixtures layer and the top layer or be equivalent to this degree of depth the asphalt mixtures layer the degree of depth and soften; Scarifying step (hereinafter referred to as " scarifying step "), to surmount be heated and the degree of depth of the basic unit of softening asphalt mixtures and the boundary face between the top layer or be equivalent to the degree of depth of described asphalt mixtures layer of this degree of depth till carry out scarifying and form old asphalt mixtures; First adds step (hereinafter referred to as " first adds step "), to by the old asphalt mixtures of scarifying, add not to be pre-stored in the aggregate of particle diameter in the pre-cryopreservation device, big or to be attached with the aggregate of pitch or to contain in the asphalt mixtures of size distribution of big diameter aggregate certain as first new material by the temperature of granuleization; Blend step (hereinafter referred to as " blend step ") mixes the old asphalt mixtures that is added with first new material, and forms the reinforcement asphalt mixtures; Big particle diameter strengthening course formation step (below, be called " big particle diameter strengthening course forms step "), by on the rest layers of the remaining asphalt mixtures layer of scarifying, the even reinforcement asphalt mixtures in shop is to form the big particle diameter strengthening course of coefficient of elasticity greater than the coefficient of elasticity of rest layers in the scarifying step; Second adds step (hereinafter referred to as " second adds step "), on formed big particle diameter strengthening course, adds not to be pre-stored in asphalt mixtures in the pre-cryopreservation device, that be used to form new top layer, i.e. second new material by the temperature of granuleization; Newly the top layer forms step (hereinafter referred to as " new top layer forms step "), and the shop is spared second new material and formed new top layer, and this step forms step with big particle diameter strengthening course and is associated; Compacting step (hereinafter referred to as " compacting step "), under the accumulation of heat state, the one compacting is formed on the big particle diameter strengthening course and new top layer on the rest layers.
Described method can also comprise: the new material before the scarifying step is moved into step (hereinafter referred to as " new material is moved into step "), with first new material and second new material that be transported into outside the self-propelled vehicle system different opportunitys, move into respectively in the pre-cryopreservation device on different opportunitys; Regenerative agent adds step (hereinafter referred to as " regenerative agent interpolation step "), when the old asphalt mixtures that is added with first new material is mixed, adds the pitch regenerative agent; Interlayer bonding step (hereinafter referred to as " interlayer bonding step ") forms step at big particle diameter strengthening course, and scatter pitch emulsion or be used to improve the material of water proofing property and cementability to rest layers, thus bonding rest layers and big particle diameter strengthening course.
Fig. 8 shows a kind of embodiment of the self-propelled vehicle system that is used to implement above steps.This self-propelled vehicle system is by preheating vehicle A, milling (miller) vehicle B and stir vehicle (mixer) C formation, in case of necessity, can also comprise roll milling wheel D.Below, with each inscape of vehicle and function together, the self-propelled vehicle system of asphalt mixtures layer that is used for re-laying the road of mating formation continuously on the road surface of present embodiment is described.
As shown in Figure 8, the heater of preheating vehicle A is opposed and be provided with the road surface between the tire of the front and back of vehicle, operates this heater this operator who is controlling vehicle.Fig. 9 shows corresponding to the observed from the side heater body 100 of vehicle moving direction, in this detailed.The high-temperature combustion gas (solid arrow) that section radiates for a plurality of spray-holes 130 of circular pipeline (duct) 120 is that the fuel that will carry to high-temperature combustion gas generating unit 110 according to burner (burner) 140 and Air mixing gas are lighted and is heated to about 550 ℃～about 750 ℃, preferably is heated to about 650 ℃ high-temperature combustion gas.The center tube 160 of the part of the collection portion 150 by constituting high-temperature combustion gas, at certain intervals along the length direction that moves be arranged side by side and constitute the curtain shape, supply with high-temperature combustion gas as the section of the part of collection portion 150 equably for each circular pipeline 120.Thereby open surface 180 and the heating region between the pitch surface at cover body (hood) 170 form the high-temperature combustion gas layer.Then, after high-temperature combustion gas conducts heat, become and reclaim burning gases (dotted line arrow), be the formed gap of periphery of each circular pipeline 120 according to the flow through section of curtain shape of getter device 190, be drawn into burning gases circulating line 200 via the inside of cover body 170, and be delivered to high-temperature combustion gas generating unit 110.
And then, preheating vehicle A advances with the speed that about 2～5m/ divides, meanwhile form about 550 ℃～about 750 ℃ high-temperature combustion gas layer on the surface of the road of mating formation, and its surface maintained 230～260 ℃ all the time, thereby under the state of not lighting pitch, make heat leak to the degree of depth of the boundary face on basic unit that surmounts the asphalt mixtures layer and top layer or be equivalent to the degree of depth of about 6～10cm of this degree of depth, can make innermost temperature reach 50～60 ℃.Realize thermoplastic step of the present invention thus, thus make milling vehicle B described later scarifying device 340 scarifying asphalt mixtures layer under the situation of not damaging and destroying aggregate and make it to become old asphalt mixtures, can implement the scarifying step with this.Certainly, unquestionable, heater is not to be confined to above-mentioned form, so long as have the heater of said function, any can employing.
As shown in Figure 8, milling vehicle B is controlling the device that the operator of this vehicle operates.Figure 10 shows corresponding to the observed from the side device body 300 of the moving direction of vehicle.Milling vehicle B comprises: first tank 320, the big diameter aggregate that will outside self-propelled vehicle system, be transported into or be attached with the aggregate of pitch or contain first material 310 arbitrarily the asphalt mixtures of size distribution of big diameter aggregate by large truck 400A, with not by the temperature of granuleization, promptly about 120～150 ℃ temperature storage; Scarifying device 340, until surmount heated by described heater 100 and the degree of depth of the basic unit of softening asphalt mixtures layer 330 and the boundary face between the top layer or be equivalent to the degree of depth of asphalt mixtures layer of this degree of depth till carry out scarifying, thereby make it to become old asphalt mixtures 331; First adding set 350, with discharge from described first tank 320, add to by the asphalt mixtures 331 of scarifying with first new material of not stored 310 by promptly about 120～150 ℃ temperature of the temperature of granuleization.
More concrete inscape to milling vehicle B describes as follows.As shown in figure 10; first new material, 310 usefulness that large truck 400A is transported into do not have illustrated equipment (plant) to produce; it is required in an amount that re-lays that connects; in the temperature of keeping 120～150 ℃; promptly, be contained in a centre and gone into discharger 400 not by under the situation of the temperature of granuleization.First new material 310 that is held is carried according to first conveyer 410 and is moved into first tank 320.At this, the top of first tank 320 is formed with to be moved into mouthful 420, the first new materials 310 and moves into mouthfuls 420 via this and move into from the input port 321 of first tank 320.Moving into mouthfuls 420 can be closed according to first conveyer 410 and second conveyer 430 slidably.Second conveyer 430 is set to link with the 3rd conveyer 440.And then according to moving into mouthfuls 420 close, as described later, first conveyer 410 and the 3rd conveyer 440 second transmission device 430 by sliding according to actuator (actuator) etc. constitutes a conveying device 450.
Then, as shown in figure 10, scarifying device 340 has the rotary scarifier (road surface scarifying pawl) that is set to two groups of spiral helicine, front and back from the left and right sides of the road width direction of mating formation to central authorities, this scarifier is that for example two pulverizing (grinding) install 341 and 342, carries out the interior rotation of surveying in the face of being provided with mutually according at least two axles that with the oil pressure are drive source usually.In view of the above, be heated and the degree of depth of the basic unit of softening asphalt mixtures layer 330 and the boundary face between the top layer or the degree of depth that is equivalent to the asphalt mixtures layer of this degree of depth are carried out scarifying, in the road Central Line, form old asphalt mixtures 331 with the ridge shape until surmounting.Propose in passing, shown in other embodiment of the milling vehicle B of Figure 12, the scarifying device 340 that is made of two reducing mechanisms 341,342 can be arranged on the front vehicles B1 of duplex vehicle (B1+B2).
In addition, preferably attemperator is set at first tank 320 that is used for pre-stored first new material 310.First new material 310 of stored preheat mode is carried according to set within it the 4th transmitting device 351 of first adding set 350 of portion of an end from the outlet opening 322 of first tank 320, and is added old asphalt mixtures 331 to.
Before vehicle C is stirred in explanation,, describe as follows to each inscape of being gone into the milling vehicle B of discharger 400 when being transported into second new material 510 described later to the centre according to other large truck B with reference to Figure 11.Second new material, 510 usefulness do not have illustrated equipment (plant) to produce, and it is required is keeping about 120～150 ℃ temperature in an amount that re-lays that connects, and promptly keeps not by under the situation of the temperature of granuleization, is contained in a centre and is gone into discharger 400.At this moment, second conveyer 430 is moved into mouth 420 by sliding closing.Meanwhile, be connected with the 3rd conveyer 440 according to second conveyer, 430, the first conveyers 410 and form a conveying device 450.More specifically, when second new material 510 of being gone into discharger 400 in the middle of will being transported into according to large truck B is moved into second tank 520, the operator of milling vehicle B by operation slidably the switching device shifter 460 of second conveyer 430 close and move into mouthfuls 420, first conveyer 410 is connected to the 3rd conveyer 440 by second conveyer 420, thereby forms a conveying device 450.Propose in passing, preferably the attemperator identical with first tank 320 also should be set at second tank 520.
Thus, second new material 510 is transported to second tank 520 that stirs vehicle C according to conveying device 450.And then, clearly illustrate as Figure 10 and Figure 11, discharger 400 is gone in centre to milling vehicle B, outside self-propelled vehicle system, be transported into first new material 310 and second new material 510 on different opportunitys, and move into first new material 310 and second new material 510 respectively to first tank 320 and second tank 520 on different opportunitys.
As shown in Figure 8, stirring vehicle C is the device of being operated by the operator who is controlling this vehicle equally.Figure 13 shows the observed from the side device body 500 of moving direction of relative vehicle.As mentioned above, stirring vehicle C comprises: second tank 520, to be transported into the asphalt mixtures that is used for new top layer of being gone into second new material 510 of discharger 400 to the centre according to the large truck 400B outside the self-propelled vehicle system, with about 120～150 ℃ not stored by the temperature of granuleization; The 5th conveyer 530 promotes and carries the old asphalt mixtures 331 that is added with first new material 310; Mixing arrangement 550, the old asphalt mixtures 331 of carrying and being added with first new material 310 to being raised receives and mixes, and makes it to become reinforcement asphalt mixtures 540; First ironing machine (screed) 580 on by the rest layers 560 of the remaining asphalt mixtures layer 330 of scarifying device 340 scarifyings, is paved reinforcement asphalt mixtures 540, to form the big particle diameter strengthening course 570 of coefficient of elasticity greater than the coefficient of elasticity of rest layers 560; Second adding set 590 on formed big particle diameter strengthening course 570, adds second new material 510 of discharging from second tank 520; Second ironing machine 610 that is associated with first ironing machine 580 is spared second new material, 510 shops of being added on big particle diameter strengthening course 570, thereby is formed new top layer 600.
In addition, stir vehicle C and also comprise: regenerative agent adding set 620 when mixing is added with the old asphalt mixtures 331 of first new material 310, is used to add the pitch regenerative agent; The 3rd tank 630, pre-stored are used for the pitch emulsion of bonding rest layers 560 and big particle diameter strengthening course 570 or are used to improve the material of water proofing property and cementability; Memory space 640 is provided with the two side between the mixing arrangement 550 and first ironing machine 580, be used to regulate the quantity delivered of reinforcement asphalt mixtures 540 to rest layers 560; Memory space 650 is provided with the two side between first ironing machine 560 and second ironing machine 610, be used to regulate the quantity delivered to second new material 510 of big particle diameter strengthening course 570.
Stir first ironing machine 580 and second ironing machine 610 of vehicle C, when the reinforcement asphalt mixtures 540 and second new material 520 are spared in the shop respectively, not only have the even function in shop usually, but also have the function of compacting.And then roll milling wheel D as shown in Figure 8 can be used in the situation of carrying out compacting as required more strongly.
Link to each other with preheating vehicle A being pre-stored with the milling vehicle B of first new material 310 and second new material 520 respectively and stirring vehicle C, and make it to work together with the speed that 2～5m/ divides, make the degree of depth of heat leak simultaneously to about 6～10cm of asphalt mixtures layer 330, make the bosom temperature of asphalt mixtures layer reach 50～60 ℃, implement thermoplastic step of the present invention with this, then, the aggregate of scarifying device 340 scarifying asphalt mixtures layer 330 under the situation of not damaging and destroying and make it to become old asphalt mixtures 331 can be finished the scarifying step with this.Below, each step of the present invention then is described.
Add step first, to being added first new material 310 by the old asphalt mixtures of scarifying.First new material 310 should be that the aggregate of comparing the maximum particle diameter that is included in asphalt mixtures layer 330 has the aggregate of bigger particle diameter or is attached with the aggregate of pitch or contains in the asphalt mixtures of size distribution of the bigger aggregate of the aggregate particle diameter of comparing the maximum particle diameter that is included in asphalt mixtures layer 330 any one.The reinforcement asphalt mixtures 540 that is produced in ensuing blend step has the aggregate of bigger particle diameter with the aggregate of comparing the maximum particle diameter that is included in asphalt mixtures layer 330, comprises about 5%～35% on the whole.This is because when the amount of big diameter aggregate is 5% when following, can not obtain above the intensity based on the reinforcement of laying depth.In addition, when the amount of big diameter aggregate surpasses 35%, can break the balance of the size distribution of asphalt mixtures, thereby be difficult to form closely knit asphalt mixtures layer.In view of the above, form in the step at the big particle diameter strengthening course that is continued, on the rest layers 560 of asphalt mixtures layer 330, the even reinforcement asphalt mixtures in shop, thereby as the layer that has utilized asphalt mixtures layer 330 again, though its thickness can increase, as described later, can form the big particle diameter strengthening course of coefficient of elasticity greater than the coefficient of elasticity of rest layers 560.At this, the structure that re-lays that has formed new top layer is in order to strengthen paving structure (Hot In-place Strengthening) by constructing big particle diameter strengthening course.
For Figure 14 detailed, this Figure 14 constructs big particle diameter strengthening course by adding new material to old asphalt mixtures, thus the result when strengthening paving structure.Data based on experimental data about the paving structure that is reinforced, be recorded in Figure 18～Figure 21, but this result is to be that the thickness of the aggregate size distribution of 13mm is the top layer of 4cm and to have maximum particle diameter be that the thickness of the aggregate size distribution of 20mm is that about 2cm among the x cm carries out scarifying to having maximum particle diameter, thereby to the old asphalt mixtures that thickness amounts to 6cm mix with 7 to 3 ratio and the shop even as new material by particle diameter be the aggregate of 20～30mm constitute " No. 4 quarrying " time, measure its thickness and the result that draws.At this, integral thickness reaches 8.6cm.That is, compare by the asphalt mixtures layer of the 6cm of scarifying, thickness has increased 2.6cm.
Figure 15 will put down into 11 years laying constructions in the standard of arterial road (national highway, local road) that is applicable in Japan of the purple open country of building of the nine divisions of China in remote antiquity-Gu He line model of mating formation, and utilizes multilayer elastic to resolve (GAMCS: the result who estimates building association of civic organization) in 15 years putting down into.Paving structure constitutes by the roadbed that constitutes with the upper strata of the lower floor of 35cm and 25cm on the roadbed with the asphalt mixtures layer that the basic unit of the top layer of 5cm and 12cm constitutes.This is the situation of the traffic volume when dividing into C traffic (1000～3000/day, direction), be used to represent the coefficient of elasticity of distortion repellence of each layer of roadbed and asphalt mixtures layer, be recuperability (E), shown in the table of Figure 15, its result is also surplus 1 year top layer life-span, and the whole life-span is 5 years.
Propose in passing, the top layer Life Prediction be one day, during the above-mentioned C traffic volume of 3000 vehicle traffic volume of a direction, with the destruction number of times (N of asphalt mixtures f) divided by the value of 3000 (platform) * 365 (day).At this, asphalt mixtures is destroyed number of times (N f) calculate by following fatigue failure reference type (source: Japanese road association pitch is laid main points in December, 1992).
(formula 1)
N f＝8.108×10 (M-3)/ε t? 3.291×E 0.854
At this, ε tBe the stretcher strain below the asphalt mixtures layer; E is the coefficient of elasticity (kgf/cm of asphalt mixtures 2); M is the void content (V of asphalt mixtures V) and pitch amount (V b) function, by formula M=4.84 * { [V b/ (V V-V b)]-value that 0.69} calculates.
Then, Figure 16 is that only above-mentioned standard the is mated formation thickness of model is the top layer part of 5cm, the model of mating formation when for example regenerating with mixing worker's method is again divided at the same traffic volume under the condition of C traffic, utilizes same multilayer elastic to resolve the result who estimates.The coefficient of elasticity on top layer before regenerate 24,000kgf/cm 2Being reinforced is 35,000kgf/cm 2But top layer Life Prediction value only is 2 years.Compare the situation of Figure 15, the life-span has only prolonged 1 year.This master pattern shows by the state of deterioration, to such an extent as to have to change basic unit and top layer according to rebuilding worker method.
Corresponding to this, Figure 17 has represented the result about the multilayer elastic parsing of the following road of mating formation, paving structure when promptly dividing into the C traffic for the same traffic volume, with 7 to 3 the ratio same with the situation of Figure 14, the thickness of scarifying from the road surface to the 10cm that surmounts the boundary face between basic unit and the top layer, to this interpolation and to mix by particle diameter be that " No. 4 quarrying " that the aggregate of 20～30mm constitutes constitutes the reinforcement asphalt mixtures, forming thickness thus on remaining rest layers after the scarifying is the big particle diameter strengthening course of 7cm, thereby be 5cm with the top layer, basic unit is 5cm and whole change on the asphalt mixtures layer of 14cm thickness for the thickness of 10cm, add second new material, thereby according to so second adding step to form thickness be the new top layer of 3cm, and under the state of accumulation of heat, be one with new top layer compacting with big particle diameter strengthening course.
Situation to Figure 15 and Figure 16 compares as can be known, the thickness of double-layer structure is that the asphalt mixtures layer of 17cm repaves the asphalt mixtures layer that the thickness of being located at three layer construction is 24cm, thereby increase according to the thickness of the 4cm of first new material and according to the thickness of the 3cm of second new material, but if the same traffic volume of hypothesis is divided into the situation of C traffic, then according to the heavy traffic flow pointed out at first for vertically and the coefficient of elasticity of horizontal stress bending, the old basic unit of coarseness layer is 24,000kgf/cm 2, and the coefficient of elasticity of big particle diameter strengthening course reaches 50 more than 2 times, 000kgf/cm 2Measured value shown in Figure 21 has also proved this point.Its result can significantly extend to 11 years with the top layer life-span in 5 years to 6 years.That is, compare use in the past according to heated type top layer regeneration operation the time situation, the present invention has can prolong the life-span the significant beneficial effect in 5～6 years.
As shown in figure 21, these are proved by experimental data.Concrete bending strength experiment, is abideed by " the crooked strength test method of JIS A 1106 concrete " according to 2 concentrated load tests and is carried out.Bending strength acts on the maximum stress in bend (tensile stress) that test occurs in test body inside during body with flexural stress and defines, and the hypothesis test body is when being elastic body, with following formula calculating.
(formula 2)
σ b＝M/Z＝(Pl/6)/(bd 2/6)＝Pl/bd 2[N/mm 2]
At this, M is the maximum bending moment (moment) that is created in the test body; Z is section factor [mm 3]; P is maximum load [N]; L be bottom length of support [mm] (300mm); B is the section width [mm] of test body, and d is the profile height [mm] (b, d are respectively 100mm) of test body.
The result is defined as, and employed coefficient of elasticity is similar to the coefficient of elasticity that calculates from bend test in the numeric value analysis of expression material behavior.In addition, observe " coefficient of elasticity that is synthesized " as can be known, the two-layer model in worker's method was 3 in the past, 395N/mm 2With respect to this, the same coefficient of elasticity that contains 3 layer models of big particle diameter strengthening course is 4,796N/mm 2, improved 1.41 times.At this moment, the bending strength of two-layer model is 6.41N/mm 2, relatively, the bending strength of 3 layer models is 8.1N/mm 2The result can determine that reinforcing effect is about 1.3 times.At this,, can be easy to judge significant reinforcing effect from measured value even if consider to strengthen according to the reinforcement of laying depth.
Propose in passing, experimental data is a benchmark with following agreement (protocol).Its objective is in order to confirm the reinforcing effect of the paving structure that worker's method according to the present invention is constructed by laboratory experiment.The following stretcher strain of mating formation of compressive strain when measurement puts on load on the model of respectively mating formation before and after the reinforcement and pitch.
Then, Figure 18 shows the paving structure summary that is compared.
A reference value during the technical data of employed mixture reference " laying construction brief guide " and American National flexible pavement association (National Asphalt Pavement Association) " has used the test evaluation of the big particle diameter mixture of Marshall proportion design " is used the general proportioning that satisfies this a reference value.Following table shows the source of a reference value.
[table 1]
The mixture title The source
Close granularity asphalt mixtures (13) The test construction brief guide
Coarseness asphalt mixtures (20) The test construction brief guide
The mixture title The source
Big particle diameter asphalt mixtures (30) The NAPA reference
The mat formation preparation method of model is carried out according to the sequence of operation shown in Figure 19.
Test method is used the testing machine of stipulating in the crooked test of concrete, prop up point load with trisection and apply load, to measure compressive strain and stretcher strain.(with reference to Figure 20)
Measure the method for distortion, on the test body and below a plurality of distortion instruments of attaching (gauge) and image data.
Test number (TN) respectively carries out 3 times for the model of respectively mating formation.
Maximum load when breaking by body bending that pitch is mated formation compares, and existing worker's method is compared with worker's method according to the present invention.
Utilization results from the mat formation distortion of upper end and lower end of body of pitch, go out the coefficient of elasticity of each layer (top layer, big particle diameter strengthening course, basic unit) according to the contrary analytical Calculation of multilayer elastic opinion, existing worker's method and the difference according to the reinforcing effect of worker's method of the present invention are confirmed with this.
Its result as shown in figure 21.
In addition, the present invention also comprises: regenerative agent adds step, when mixing is added with the old asphalt mixtures of first new material, adds the pitch regenerative agent; Interlayer bonding step (hereinafter referred to as " interlayer bonding step ") forms in the step at big particle diameter strengthening course, and scatter pitch emulsion or be used to improve the material of water proofing property and cementability to rest layers, thus bonding rest layers and big particle diameter strengthening course.In view of the above, pitch to deterioration is regenerated, even if or when surmounting the damage of the boundary face between basic unit and the top layer or crackle and reaching darker rest layers, can control to Min. reciprocal influence by between rest layers and big particle diameter strengthening course, adhesives being set.In addition, formed big particle diameter strengthening course and new top layer, under the state of accumulation of heat, be compacted and be one, thereby between big particle diameter strengthening course and new top layer, need not to be provided with adhesives, the bottom surface portions on new top layer can form with the engagement that contains aggregate with the surface portion of big particle diameter strengthening course, therefore according to stress longitudinally and the dislocation that incidental interlayer slip caused also is difficult for producing.
Figure 22 to Figure 29 shows summary and the result who utilizes the full scale test body (model of mating formation) of mating formation to be tested, and to be used for the laying reinforcing effect of quantitative assessment according to big particle diameter strengthening course, promptly durability promotes effect.Figure 22 shows the paving structure of the full scale test body of mating formation, and this test body is applicable to the test of quantitative assessment according to the laying effect of big particle diameter strengthening course.The test system of mating formation makes the paving structure of the pitch laying that is applicable to the urban district.In Figure 22, the test body No.1～No.4 that mats formation has following structure.
No.1: standard laying structure
No.2: utilize the old top layer 3cm+ top 3cm of old basic unit to form the structure of big particle diameter strengthening course 8cm
No.3: roadbed thickness is reduced to 1/2 and reduced the structure of support force for the standard paving structure
No.4: the structure that the structure of No.3 is carried out reinforcement according to big particle diameter strengthening course 8cm
Carry out FWD (Falling Weight Deflect meter) test for these test bodies of respectively mating formation, thereby detect the displacement on surface of mating formation that occurs in the test body of respectively mating formation, and relatively lay reinforcing effect.The design condition of test body of mating formation is that traffic loading is that wheel load, the design traffic volume of 5t is that daily traffic volume reaches about 100～250, the roadbed support force is roadbed CBR=8.Figure 23 shows the quality test content of the test body of mating formation of made.
The laying reinforcing effect of testing body of mating formation can be estimated according to the fatigue failure number of times (fatigue failure is returned number or allowed the traveling number of times) of the test body of mating formation.The fatigue failure number of times of testing body of mating formation is meant on the road of mating formation, and applies certain wheel load repeatedly to the surface of mating formation, until the number of times that cracks at the body of mating formation.As shown in figure 24, the fatigue failure number of times utilizes wheel load with 5t being applied to the value of the stretcher strain below the asphalt mixtures that is created in the test body of mating formation when mating formation the test body and the value that is created in the compressive strain above the roadbed is calculated.The paving structure that illustrates the existing body of mating formation of upper left side among Figure 24, the paving structure that illustrates the body of mating formation that contains big particle diameter strengthening course of upper right side.The mathematical expression of Figure 24 is the calculating formula that is used to calculate the fatigue failure number of times that American National flexible pavement association (NAPA) formulates.
Figure 25 shows the quality test result of the test body of mating formation, and Figure 26 shows according to (D under the weight whereabouts of FWD test 0) the surface displacement amount.This displacement is the bending that faces down and produced when recessed according to mat formation to pitch plate whereabouts weight and plate, and the value of the big more described displacement of support force of mating formation is more little.As shown in figure 25, No.2 mat formation the test body displacement at the mat formation test body of all its displacements of detection position less than other.In addition, can learn following content from Figure 26.
(1) for the difference on the paving structure of No.1 and No.2, the structure of No.2 is replaced into big particle diameter strengthening course with the part of the portion of basic unit of the structure of No.1.The displacement of No.2 is less than the displacement of No.1, when the support force of roadbed and roadbed is identical, improves according to big particle diameter strengthening course and to lay support force.
(2) No.3 and No.4 are the paving structures that respectively the roadbed thickness of No.1 and No.2 is changed to half.These test bodies of mating formation change for the support force that makes the body roadbed depths of mating formation on same roadbed and set.As the situation of above-mentioned (1), by big particle diameter strengthening course is set, make displacement diminish, improve and lay support force.
(3) for the support force that the minimizing according to roadbed thickness changes, when utilization was estimated according to the equivalent conversion thickness of Ta design method, if roadbed thickness reduces 10cm, then the support force characteristic descended about 20%.
Figure 27 shows utilization in construction mat formation test employed material and coefficient of elasticity of the asphalt mixtures that the test body made detects during body.The coefficient of elasticity of asphalt mixtures detects according to " modulus of elasticity of asphalt mixtures (resilient modulus) test method(s) " (laying the other volume of test method(s) brief guide).Test temperature is 25 ℃.This coefficient of elasticity is used as input value when calculating the fatigue failure number of times of pitch laying described later.And according to the record of " the design and construction guides (Japanese road association) of mating formation ", the coefficient of elasticity of general asphalt mixtures is 600～12,000 (MPa).
As shown in figure 27, the coefficient of elasticity of coarseness asphalt mixtures or big particle diameter asphalt mixtures is greater than close granularity asphalt mixtures.This expression is when the aggregate floor increases, and it is big that the coefficient of elasticity of asphalt mixtures becomes.
Figure 28 shows by multilayer elastic is theoretical and resolves the stretcher strain below each the asphalt mixtures layer that is created in the test body of mating formation that is calculated and be created in compressive strain above the roadbed.As the input value of calculation procedure, used the coefficient of elasticity (with reference to Figure 27) of the asphalt mixtures that detects according to elasticity modulus test and the bed thickness of the test body of respectively mating formation.
Upside figure from Figure 28 can learn following content.
(1) result from stretcher strain below the asphalt mixtures layer when big, expression asphalt mixtures layer is in the state that crackle destroys that is easy to generate.Relatively No.1 and No.2 as can be known, No.2 is by being provided with big particle diameter strengthening course, it is about 1/2 that stretcher strain is reduced to, and compares No.1 and be in crackle and destroy the state that is difficult for generation.
(2) relatively No.2 and No.4 as can be known, even if become half for the thickness of the roadbed thickness roadbed of the 20cm of No.2, but the size of stretcher strain is almost identical with No.2.Hence one can see that, even under the state (be estimated as and descend 20% approximately) how many support forces of roadbed depths has reduced, by the effect that big particle diameter strengthening course can obtain scatteredload is set, the repellence of destroying for the crackle of asphalt mixtures can rise.
In addition, can learn following content from figure below of Figure 28.
When (1) compressive strain above the roadbed was big, expression applied according to the wheel load, was easy to generate the distortion (rut seal depression) that compression causes at the body of mating formation.By comparing No.1 and No.2 as can be known, No.2 becomes thick and heavy by big particle diameter strengthening course is set, the decrement minimizing that its result mats formation whole.
(2) for No.1 and No.4, the whole thickness No.1 that mats formation is slightly thicker.Though the roadbed thickness of No.4 is 10cm and less, is provided with big particle diameter strengthening course.The size of the compressive strain above the roadbed, it is slightly smaller that No.4 compares No.1, thus the effect that can suppress compressive strain that big as can be seen particle diameter strengthening course is brought.
Figure 29 shows being recorded in mat formation the plan traffic volume of design and construction in the guide and the relation between the fatigue failure number of times, and value that will stretcher strain shown in Figure 28 and compressive strain is input in the calculating formula shown in Figure 24 respectively mating formation of acquisition and tests the fatigue failure number of times of body.And the fatigue failure number of times of Figure 29 has adopted N shown in Figure 24 FaAnd N FbIn less number of times.
Can learn following content from Figure 29.
(1) the fatigue failure number of times (about 950,000) that is provided with the No.2 of big particle diameter strengthening course reaches 6 of No.1 and accompanies abovely, can learn from its result, and the durability of mating formation when big particle diameter strengthening course is set can rise.As a result, for No.2, the plan traffic volume is distinguished and is equaled the above paving structure of 1 grade.
(2) the fatigue failure number of times of No.3 is about 50,000 times, and No.4 is about 250,000 times, has increased about 5 times.Can learn from this result, even if under how many situations about descending of support force of mating formation in the attenuation of roadbed thickness, as long as big particle diameter strengthening course is set, the effect of the durability that then can improve.

Claims (17)

1. the asphalt mixtures layer of the road of will mating formation repaves the method for being located at the road surface continuously, and this method is finished voluntarily by making self-propelled vehicle system, it is characterized in that described method comprises:
(a) thermoplastic step, the surface of heating described asphalt mixtures layer, make heat leak to the degree of depth of the boundary face between basic unit that surmounts described asphalt mixtures layer and the top layer or be equivalent to this degree of depth described asphalt mixtures layer the degree of depth and soften;
(b) scarifying step, to surmount be heated and the degree of depth of the described boundary face of softening described asphalt mixtures or be equivalent to the degree of depth of described asphalt mixtures layer of this degree of depth till carry out scarifying and form old asphalt mixtures;
(c) first adds step, to described old asphalt mixtures through scarifying, interpolation to be to be pre-stored in the aggregate of particle diameter in the pre-cryopreservation device, big by the temperature of granuleization or to be attached with the aggregate of pitch, perhaps contains any first new material in the asphalt mixtures of size distribution of big diameter aggregate;
(d) blend step mixes the described old asphalt mixtures that is added with described first new material, and forms the reinforcement asphalt mixtures;
(e) big particle diameter strengthening course forms step, in described scarifying step by scarifying after on the rest layers of remaining described asphalt mixtures layer, the even described reinforcement asphalt mixtures in shop is to form the big particle diameter strengthening course of coefficient of elasticity greater than the coefficient of elasticity of described rest layers;
(f) second adds step, on formed described big particle diameter strengthening course, adds not to be pre-stored in asphalt mixtures in the pre-cryopreservation device, that be used to form new top layer, i.e. second new material by the temperature of granuleization;
(g) new top layer forms step, and the shop is spared described second new material and formed new top layer, and this step forms step with described big particle diameter strengthening course and is associated;
(h) compacting step, under the accumulation of heat state, the one compacting is formed on described big particle diameter strengthening course and the described new top layer on the described rest layers.
2. method according to claim 1, it is characterized in that also comprising before described scarifying step: new material is moved into step, with described first new material and described second new material that be transported into outside the described self-propelled vehicle system different opportunitys, move into respectively in the pre-cryopreservation device on described different opportunitys.
3. method according to claim 1 and 2 is characterized in that described first new material is that the aggregate of comparing the maximum particle diameter that is included in described asphalt mixtures layer has the aggregate of bigger particle diameter or is attached with the aggregate of pitch or contains in the asphalt mixtures of size distribution of the bigger aggregate of the aggregate particle diameter of comparing the maximum particle diameter that is included in described asphalt mixtures layer any one.
4. according to any described method in the claim 1 to 3, it is characterized in that being added with the described reinforcement asphalt mixtures of described first new material, include the aggregate that the aggregate of comparing the maximum particle diameter that is included in described asphalt mixtures layer has bigger particle diameter, its content is for comprising about 5%～35% on the whole.
5. according to any described method in the claim 1 to 4, it is characterized in that described blend step also comprises: regenerative agent adds step, when the described old asphalt mixtures that is added with described first new material is mixed, adds the pitch regenerative agent.
6. according to any described method in the claim 1 to 5, it is characterized in that described second new material contains and the aggregate that is included in the size distribution that aggregate the had size distribution much at one of described asphalt mixtures layer.
7. according to any described method in the claim 1 to 6, it is characterized in that described big particle diameter strengthening course forms step and also comprises: the interlayer bonding step, scatter pitch emulsion or be used to improve the material of water proofing property and cementability to described rest layers, thus bonding described rest layers and described big particle diameter strengthening course.
8. self-propelled vehicle system is used for asphalt mixtures layer with the road of mating formation and repaves continuously and be located at the road surface, it is characterized in that comprising:
Preheating vehicle (A), this preheating vehicle (A) comprises heater, the mat formation surface of described asphalt mixtures layer of road of this heater heating, make heat leak to the degree of depth of the boundary face between basic unit that surmounts described asphalt mixtures layer and the top layer or be equivalent to this degree of depth described asphalt mixtures layer the degree of depth and soften;
Milling vehicle (B), this milling vehicle (B) comprises: first tank, with big diameter aggregate or be attached with the aggregate of pitch, perhaps contain any first material in the asphalt mixtures of size distribution of big diameter aggregate, not stored by the temperature of granuleization; The scarifying device, until surmount be heated and the degree of depth of the described boundary face of softening described asphalt mixtures layer or be equivalent to the degree of depth of asphalt mixtures layer of this degree of depth till carry out scarifying, thereby make it to become old asphalt mixtures; First adding set, with discharge from described first tank, add described old asphalt mixtures to described first new material of not stored by the temperature of granuleization;
Stir vehicle (C), this stirrings vehicle (C) comprising: second tank is second new material with the asphalt mixtures that is not used to form new top layer by the temperature pre-stored of granuleization; Mixing arrangement receives and mixes the described old asphalt mixtures that is added with described first new material, to form the reinforcement asphalt mixtures; First ironing machine, on the rest layers of remaining described asphalt mixtures layer, the even described reinforcement asphalt mixtures in shop is to form the big particle diameter strengthening course of coefficient of elasticity greater than the coefficient of elasticity of described rest layers after by the scarifying of described scarifying device; Second adding set, on formed described big particle diameter strengthening course, add discharge from described second tank, with not by described second new material of the temperature pre-stored of granuleization; Second ironing machine that is associated with first ironing machine is used to spread even described second new material that adds, to form new top layer.
9. self-propelled vehicle system according to claim 8 is characterized in that also comprising Roller compaction device (D), is formed on the described big particle diameter strengthening course on the described rest layers and is formed on described new top layer on this big particle diameter strengthening course with the state one compacting of accumulation of heat.
10. according to Claim 8 or 9 described self-propelled vehicle systems, it is characterized in that described milling vehicle (B) also comprises: discharger is gone in a centre, receives and discharge described first new material and described second new material that are transported into outside the described self-propelled vehicle system on different opportunitys; The new material that comprises at least two continuous transport paths is moved into device, has switching device shifter on the described transport path, to be used for moving into described first new material and described second new material of being gone into the discharger discharge from described centre to described first tank and described second tank respectively on described different opportunitys; Wherein, when described first new material being gone into discharger from described centre when moving into described first tank, continuous two transport paths that described switching device shifter makes described new material move into device cut off and form and move into mouth, by the formed described mouth of moving into described first new material is moved into described first tank, and when described second new material being gone into discharger from described centre when moving into described second tank, described switching device shifter cuts out and is formed on the described mouth of moving into that described new material is moved into device, thereby connect described two transport paths and form a transport path, make described second new material be gone into discharger from described centre thus and move into described second tank via a described transport path.
11. any described self-propelled vehicle system in 10 according to Claim 8 is characterized in that described first new material is that the aggregate of comparing the maximum particle diameter that is included in described asphalt mixtures layer has the aggregate of bigger particle diameter or is attached with the aggregate of pitch or contains in the asphalt mixtures of size distribution of the bigger aggregate of the aggregate particle diameter of comparing the maximum particle diameter that is included in described asphalt mixtures layer any one.
12. any described self-propelled vehicle system in 11 according to Claim 8, it is characterized in that being added with the described reinforcement asphalt mixtures of described first new material, include the aggregate that the aggregate of comparing the maximum particle diameter that is included in described asphalt mixtures layer has bigger particle diameter, its content is for comprising about 5%～35% on the whole.
13. any described self-propelled vehicle system in 12 is characterized in that described second new material contains and the aggregate that is included in the size distribution that aggregate the had size distribution much at one of described asphalt mixtures layer according to Claim 8.
14. any described self-propelled vehicle system in 13 according to Claim 8, it is characterized in that described stirring vehicle (C) also comprises the regenerative agent adding set, to be used for when being added described first new material by the described old asphalt mixtures of scarifying, adding the pitch regenerative agent.
15. any described self-propelled vehicle system in 14 according to Claim 8, it is characterized in that described stirring vehicle (C) also comprises the 3rd tank, to be used for the material that pre-stored is used for the pitch emulsion of bonding described rest layers and described big particle diameter strengthening course or is used to improve water proofing property and cementability.
16. any described self-propelled vehicle system in 15 according to Claim 8, it is characterized in that described stirring vehicle (C) also comprises first memory space that is formed between described mixing arrangement and described first ironing machine, to be used to regulate the quantity delivered of the described reinforcement asphalt mixtures that is provided to described rest layers.
17. any described self-propelled vehicle system in 16 according to Claim 8, it is characterized in that described stirring vehicle (C) also comprises second memory space that is formed between described first ironing machine and described second ironing machine, to be used to regulate the quantity delivered of described second new material that is provided to described big particle diameter strengthening course.
CN2008801157756A 2007-11-12 2008-11-12 Method of continuously repaving asphalt mixture layer of paved road in-situ and self-propelled vehicle system therefor Expired - Fee Related CN101855404B (en)

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