CN109535751A - Stress absorbing layer high solids content emulsified asphalt and its preparation and construction method - Google Patents
Stress absorbing layer high solids content emulsified asphalt and its preparation and construction method Download PDFInfo
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- CN109535751A CN109535751A CN201811612721.2A CN201811612721A CN109535751A CN 109535751 A CN109535751 A CN 109535751A CN 201811612721 A CN201811612721 A CN 201811612721A CN 109535751 A CN109535751 A CN 109535751A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
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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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/18—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
- E01C19/185—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect for both depositing and spreading-out or striking-off the deposited mixture
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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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
- E01C7/325—Joining different layers, e.g. by adhesive layers; Intermediate layers, e.g. for the escape of water vapour, for spreading stresses
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2395/00—Bituminous materials, e.g. asphalt, tar or pitch
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- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses stress absorbing layer high solids content emulsified asphalt and its preparation and construction methods, it is made by plain asphalt, asphalt additive, emulsifier, modifying agent, water and pH adjusting agent, solid content is 67-75%, the mass component ratio of raw material are as follows: plain asphalt 50-70%, asphalt additive 1-12%, emulsifier 0.2-3.0%, modifying agent 2.0-10.0%, remaining as water and pH adjusting agent, step is: plain asphalt being heated, asphalt additive is proportionally added into the mixture for being uniformly mixing to obtain pitch and asphalt additive in plain asphalt；Emulsifier is configured to aqueous solution, and modifying agent is added, and emulsifier soap lye is made, and adjusts emulsifier soap lye pH value with pH adjusting agent, then heats；The mixture of emulsifier soap lye and pitch and asphalt additive is passed sequentially through into colloid mill, emulsified asphalt finished product is obtained after grinding.The present invention spills/dispenses emulsified asphalt and rubble by synchronous macadam seal paver, and the effect of " permeable layers+should be with absorbed layer " can be achieved in primary construction, reduces working procedure, reduces construction cost.
Description
Technical field
The present invention relates to emulsified asphalt and technical field of construction more particularly to a kind of stress absorbing layer to be emulsified with high solids content
Pitch and preparation method thereof and construction method.
Background technique
The principal mode of the current Pavement Structures of High Type Highways in China is semi-rigid structure, wherein about 90% or more
Bituminous pavement has used semi-rigid type base, since semi-rigid type base has good compactness and intensity height, in use
Reflection is formed since the effect of load repeatedly inevitably generates fatigue cracking, and from the bottom to top on reflective road face to split
Seam.For the generation of pre- Anti-reflective Crack of Overlaying, the measure that the country takes is that mainly have: (1) in semi-rigid type base and pitch cutting optimal
Between pave asphalt macadam stress absorption layer；(2) pave one layer of rubber asphalt stress absorbing layer on semi-rigid type base；(3) exist
The earth grille that paves on semi-rigid type base Anti-crack layer；(4) geotextile Anti-crack layer is overlayed on semi-rigid type base.
Its cold plasticity of rubber asphalt stress absorbing layer and toughness improve, and can achieve the effect of delayed reflex,
But it is high that there is the quality requirements that construction is paved and rolled, and be easy to cause the defect of environmental pollution；Asphalt macadam stress is inhaled
Layer is received, its main feature is that mixture hole is larger, stress is reduced and concentrates, so that basic crack is not expanded to surface layer, but there are engineerings
Cost is high, less economical problem, using being restricted；Earth grille Anti-crack layer is several years ago using more wide
It is general, but there is due to construction requirement it is higher, construction quality is difficult to control, and the quality constructed directly affects the anti-of Anti-crack layer
The defect of effect is split, therefore seldom application at present.In addition, the effect of anti-cracking of geotextile Anti-crack layer by geotextile influenced compared with
Greatly, since the technical standard and quality of domestic nonweaven geotextile are difficult to meet the requirements, thus geotextile Anti-crack layer is limited
Application.
Grant number provides a kind of asphalt macadam stress absorption layer and its construction method for the invention of CN200710019042,
The stress absorbing layer is once made of metalling, stress absorption adhesive layer and articulamentum from top to bottom.Stress used in the present invention
Absorbed layer high solids content emulsified asphalt solid content 67-75%, does not need the laying of articulamentum when using as stress absorbing layer,
Construction cost is reduced while guaranteeing laying effect.
Patent of invention CN201210406539 discloses a kind of fiber reinforcement type bituminous pavement stress absorbing layer and its construction
Method, the stress absorbing layer are made of SBS modified emulsifying asphalt, glass fibre or basalt fibre, rubble.Height used in the present invention
Solid content stress absorption coating emulsified asphalt alleviates stress concentration without glass fibre or basalt fibre, by asphalt additive
And the performance of modifying agent also can reach effect same.
In conclusion country's stress absorbing layer construction at present haves the shortcomings that construction cost is high, working procedure is complicated.
Summary of the invention
The present invention is exactly in order to solve the above problems existing in the present technology, to provide a kind of stress absorbing layer high solids content
Emulsified asphalt is a kind of cheap, efficient, environmental-friendly high polymer regenerative emulsified asphalt, subtracts applied to stress absorbing layer
Reflection cracking in a pavement problem is delayed, and once the effect of " permeable layers+stress absorbing layer " is realized in construction, reduces priming construct work
Sequence reduces construction cost.
The present invention also provides a kind of stress absorbing layer preparation methods of high solids content emulsified asphalt.
The present invention also provides a kind of stress absorbing layer construction methods of high solids content emulsified asphalt.
In terms of the application of stress absorbing layer high solids content emulsified asphalt includes following four:
(1) on the cement stabilized macadam layer for being used to create bituminous pavement as stress absorbing layer.
(2) it is applied on old asphalt pavement as stress absorbing layer, upper berth hot-mix asphalt mixture realizes old pavement
Transformation.
(3) it is applied on old cement concrete road as stress absorbing layer, upper berth hot-mix asphalt mixture, realizes that road surface is " white
Change black ".
(4) it is applied between bituminous pavement upper layer and middle surface layer as stress absorbing layer.
Above-mentioned purpose of the invention is achieved by the following technical solution:
A kind of stress absorbing layer high solids content emulsified asphalt, passes through plain asphalt, asphalt additive, emulsifier, modification
Agent, water and pH adjusting agent are made for raw material, solid content 67-75%, the mass component ratio of the raw material are as follows: plain asphalt 50-
70%, asphalt additive 1-12%, emulsifier 0.2-3.0%, modifying agent 2.0-10.0%, remaining as water and pH adjusting agent.
The plain asphalt is bi tumenf orr oad, and the emulsifier is cationic emulsifier, the modification
Agent is thermoplastic elastomer (TPE) class latex.
The plain asphalt is any one of AH-50, AH-70, AH-90, AH-110 or AH-130.
The asphalt additive is that aromatic hydrocarbons extracts oil, furfural extract oil, waste cooking oils, remaining oil, bitumen regenerant out
One or more of.
The emulsifier is alkyl polyamine class, oxygen amine, quaternary ammonium salt, fatty amines, lignin amine, imidazolines
Or one of amides or a variety of.
The modifying agent is one of styrene-butadiene latex, NBR latex, butadiene-vinylpyridine copylymer latex, polychloroprene latex or a variety of.
The water is any one of tap water, industrial water, distilled water or deionized water；
The pH adjusting agent is hydrochloric acid, formic acid, acetic acid or phosphoric acid.
A kind of preparation method of stress absorbing layer high solids content emulsified asphalt, comprising the following steps:
1) plain asphalt is heated to 120-150 DEG C, asphalt additive is proportionally added into plain asphalt and is stirred evenly
Obtain the mixture of pitch and asphalt additive；
2) emulsifier is configured to aqueous solution by the 0.2-3.0% of emulsified asphalt gross mass, and modifying agent is added, and emulsifier is made
Emulsifier soap lye pH value is adjusted to 1.5-2.5 with pH adjusting agent, is then heated to 35-60 DEG C by soap lye；
3) mixture of mentioned emulsifier soap lye and pitch and asphalt additive is passed sequentially through into colloid mill, is obtained after grinding
Emulsified asphalt finished product.
The construction method of stress absorbing layer high solids content emulsified asphalt, comprising the following steps:
1) control of emulsified asphalt spread temperature is at 80 ± 5 DEG C, spread quantity 1.2-2.3L/m2, emulsified when using I type rubble
Pitch sprinkling amount is 1.5-2.2L/m2, emulsified asphalt spread quantity is 1.6-3.0L/m when using II type rubble2；
2) synchronous macadam seal paver enters designated position, starts emulsified asphalt spread and crushed stone spreading and according to calibration speed
It drives at a constant speed；
3) it is rolled immediately using pneumatic-tired rollers after the completion of emulsified asphalt and crushed stone spreading, gross area rolls one time；
After the evaporation of work surface moisture, preferably roll again one time, it is extra after having pressed to gather materials and handle in time.
When emulsified asphalt spread or/and crushed stone spreading suspend for some reason or construct end, and vehicle is caused to halt, in time
Emulsified asphalt spread device and road-metal spreading apparatus are closed, when constructing again, emulsified asphalt spread should be continued in transverse joint edge
And crushed stone spreading, it avoids repeating to spill/dispense.
The stress absorbing layer uses framing operation, and Longitudinal Construction Jointing should ensure that sub-layer area all standing.
It when defect occur in emulsified asphalt spread or crushed stone spreading, should manually handle in time, emulsified asphalt accumulation should give
It strikes off, rubble processing should be completed before emulsified asphalt is demulsified.
Stress absorbing layer used in the present invention is transported with high solids content emulsified asphalt by clean special train, and stress is inhaled
It receives layer construction and uses synchronous macadam seal paver, daily minimal tcmperature should be higher than that 4 DEG C in the construction time, and must not construct in the rainy day.
The intensity of the step 1) rubble meets current J TG F40 standard requirements, and specification meets to be required as defined in table 1:
1 rubble sieve pore percent of pass of table
Wherein I type crushed stone spreading amount is 4-11Kg/m2, II type crushed stone spreading amount is 5-12Kg/m2, part, which is leaked, spreads or spreads more
It should be in the preceding artificial treatment of emulsified asphalt demulsification.
The work of preparation of construction and attention of the invention include: semi-rigid type base as sub-layer when, should be by current specifications
It is required that checking base's appearance and inherent quality technical indicator, repair process is carried out to the defects of Local Cracking, pollution.Old cement road
When face is as sub-layer, Shot Blasting should be carried out to cement pavement, remove panel laitance, dust and other impurities, formed coarse, dry
Operation surface.Building stones should dry, clean, Ying Shuixi when dust content is excessively high, dry, or use after mixer dust removal process.
It is equipped with rubber roller 2 not less than 25 tons.Check crushed stone sealing vehicle use state, cleaning is interior and vehicle body may be dirty
The other materials for contaminating work surface spills the/parameters such as dispensing apparatus oil pipe nozzle at high speeds, running speed according to design quantity calibration.It answers
Should construct asphalt surface course as early as possible after the completion of the construction of power absorbed layer, intermediate unsuitable open to traffic；If have special circumstances that must open,
The rear 2h should be finished in stress absorbing layer operation allows vehicle to drive into.No entry, and vehicle carries out suddenly in stress absorption layer region
The operation such as brake and u-turn.
Beneficial effects of the present invention:
1. the present invention provides a kind of cheap, efficient, environmental-friendly high polymer regenerative emulsified asphalt, applied to answering
Power absorbed layer solves the problems, such as reflection cracking in a pavement, and once the effect of " permeable layers+stress absorbing layer " is realized in construction, is reduced
Layer working procedure, reduces construction cost.
2. it is of the invention by the way that high solids content emulsified asphalt applied to stress absorbing layer, is solved the problems, such as reflection cracking in a pavement,
The emulsified asphalt of spreading plays the role of permeable layers and stress absorbing layer simultaneously, reduces working procedure, improves work efficiency.
3. the present invention cannot only be applied to bituminous pavement it is newly-built in stress absorbing layer, can also be applied to rebuilding old road,
Old road surfaces (bituminous pavement or cement pavement) is spread in as stress absorbing layer, upper berth hot-mix asphalt mixture is completed
The transformation on old road.
4. the present invention has excellent adhesion property.Since stress absorbing layer high solids content emulsified asphalt has large arch dam
Amount, highly viscous characteristic, solid content 67-75%, 50 DEG C of Saybolt viscosity 200s or more, are to supply emulsified asphalt in the market
10 times or more, ensure that the adhesiveness of material；Due to the stress absorbing layer bitumen content of high solids content emulsified asphalt superelevation
With high viscosity characteristic, there is better adhesiveness with building stones and semi-rigid type base；Meanwhile stress absorbing layer high solids content cream
Change pitch and used dedicated modifying agent, this kind of modifying agent is very good with the adhesion of cement and building stones, ensure that emulsified asphalt
It can be firmly adhered to each other with building stones and semi-rigid type base.
5. the present invention has excellent anti-fatigue performance.Simulating lab test shows to make using high solids content emulsified asphalt
Fatigue life for stress absorbing layer test specimen is the 2 times or more using rubber asphalt as stress absorbing layer test specimen, antifatigue to open
It is excellent to split ability.
6. waterproof performance of the present invention is good.Dedicated modifying agent can form fine and close, uniform polymer film, be adhered to half
Long-acting adhesive layer is formed in rigid base, prevents moisture from entering semi-rigid type base and road is caused further to endanger.
7. the present invention has excellent low temperature anti-cracking ability.Stress absorbing layer high solids content emulsified asphalt PG low temperature etc.
Grade is at least -28 DEG C, and cryogenic property is good, can effectively prevent cold cracking.
8. the present invention can effectively repair crack disease.Stress absorbing layer high solids content emulsified asphalt contains special asphalt
Additive, with good power of regeneration and penetrating power, can fracture be sufficient filling with, and can the old road of highly efficient regeneration
Pitch inside road table and crack.There is Special modifier excellent viscous toughness, intensity, high temperature performance and elasticity to restore, and guarantee
The pavement performance of material, thus stress absorbing layer can effectively be sealed with high solids content emulsified asphalt, repair semi-rigid type base and
Road table crack, improves the service life of road.
9. construction efficiency of the invention is high, the effect of " permeable layers+stress absorbing layer " is can be realized in primary construction, quick high
Effect.
10. environmentally protective, energy-saving and emission-reduction of the invention.Compared with the traditional asphalt material used in the prior art, this hair
Harmful bitumen flue gas will not be generated in bright stress absorbing layer high solids content emulsified asphalt construction, it is non-toxic to humans,
Meet the industry trend on current development green road surface.Stress absorbing layer is 75-85 DEG C with high solids content emulsified asphalt construction temperature,
The heating (160-180 DEG C) to pitch is avoided, energy consumption is significantly reduced.
11. fast using open to traffic after present invention construction.Stress absorbing layer with high solids content emulsified asphalt after construction at
Type speed is fast, quick open to traffic, social influence caused by reduction traffic control can also significantly increase construction effect in 2h
Rate.
12. the present invention has a wide range of application.Stress absorbing layer use high solids content emulsified asphalt as stress absorbing layer in use,
It can be applied not only to newly-built bituminous pavement, can be also used for the transformation of old asphalt pavement and old cement concrete road.
Detailed description of the invention
Fig. 1 is present invention construction schematic diagram of a layer structure one；
Fig. 2 is present invention construction schematic diagram of a layer structure two.
In Fig. 1, cement stabilized macadam layer, old asphalt pavement or the old cement concrete road of 1. newly-built bituminous pavements, 2. emulsification drips
Cyan layer, 3. metallings, 4. asphalt surface courses.
In Fig. 2, surface layer in 1. pitches, 2. emulsified asphalt layers, 3. metallings, 4. asphalt uplayers.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.
A kind of stress absorbing layer high solids content emulsified asphalt, passes through plain asphalt, asphalt additive, emulsifier, modification
Agent, water and pH adjusting agent are made for raw material, solid content 67-75%, the mass component ratio of the raw material are as follows: plain asphalt 50-
70%, asphalt additive 1-12%, emulsifier 0.2-3.0%, modifying agent 2.0-10.0%, remaining as water and pH adjusting agent.
The plain asphalt is bi tumenf orr oad, and the emulsifier is cationic emulsifier, the modification
Agent is thermoplastic elastomer (TPE) class latex.
The plain asphalt is any one of AH-50, AH-70, AH-90, AH-110 or AH-130.
The asphalt additive is that aromatic hydrocarbons extracts oil, furfural extract oil, waste cooking oils, remaining oil, bitumen regenerant out
One or more of.
The emulsifier is alkyl polyamine class, oxygen amine, quaternary ammonium salt, fatty amines, lignin amine, imidazolines
Or one of amides or a variety of.
The modifying agent is one of styrene-butadiene latex, NBR latex, butadiene-vinylpyridine copylymer latex, polychloroprene latex or a variety of.
The water is any one of tap water, industrial water, distilled water or deionized water；
The pH adjusting agent is hydrochloric acid, formic acid, acetic acid or phosphoric acid.
Embodiment 1:
1. the preparation of emulsified asphalt
A. the preparation of raw material: AH-50 plain asphalt accounts for 50wt%, and oxygen amine emulsifier accounts for 0.7wt%, styrene butadiene latex modified
Agent accounts for 10.0wt%, and furfural extract oil asphalt additive accounts for 12wt%, and remaining ingredient is water and pH adjusting agent, and wherein water uses certainly
Water, pH adjusting agent are hydrochloric acid, by percentage to the quality；
B. asphalt modifier described in a is added to plain asphalt to be uniformly mixed, and is heated to 135 DEG C；
C. emulsifier, modifying agent and water are weighed in proportion and prepares soap lye, and soap lye pH value is adjusted to 2.0 with acid, is then heated
To 50 DEG C；
D. the mixture of mentioned emulsifier soap lye and pitch and asphalt additive is passed sequentially through into colloid mill, is obtained after grinding
Emulsified asphalt finished product.
2. the construction of emulsified asphalt
It is illustrated in conjunction with construction procedure of the Fig. 1 to this example.
It a.1 is the cement stabilized macadam layer of newly-built bituminous pavement.Feather plucking is carried out to semi-rigid type base using sweeper, and clear
Except panel laitance, dust and other impurities, coarse, drying operation surface is formed；
B. emulsified asphalt layer 2, the I type metalling 3 of synchronous macadam seal paver spread stress absorbing layer, emulsified asphalt layer are used
2 spread quantity are 1.2L/m2, 80 DEG C of spread temperature；The building stones spreading amount of I type metalling 3 is 4Kg/m2；
C. emulsified asphalt layer 2, I type metalling 3 are rolled using pneumatic-tired rollers immediately after the completion of dispensing, and gross area is ground
Pressure one time；
D. stress absorbing layer operation finish after 2h can open to traffic, and carry out the construction of asphalt surface course 4.
Embodiment 2:
1. the preparation of emulsified asphalt
A. the preparation of raw material: AH-70 plain asphalt accounts for 61wt%, and alkyl polyamine class or quaternary ammonium salt emulsifier account for
0.2wt%, NBR latex modifying agent account for 5.0wt%, and aromatic hydrocarbons extraction oil asphalt additive accounts for 7wt%, and remaining ingredient is water and pH
Regulator, wherein water uses industrial water, and pH adjusting agent is formic acid, by percentage to the quality；
B. asphalt additive described in a is added to plain asphalt to be uniformly mixed, and is heated to 135 DEG C；
C. emulsifier, modifying agent and water are weighed in proportion and prepares soap lye, and soap lye pH value is adjusted to 2.0 with acid, is then heated
To 50 DEG C；
D. the mixture of mentioned emulsifier soap lye and pitch and asphalt additive is passed sequentially through into colloid mill, is obtained after grinding
Emulsified asphalt finished product.
2. the construction of emulsified asphalt
It is illustrated in conjunction with construction procedure of the Fig. 1 to this example.
It a.1 is old cement concrete road.Feather plucking is carried out to old pavement using sweeper, and removes panel laitance, dust and other impurities,
Form coarse, drying operation surface；
B. synchronous macadam seal paver spread stress absorbing layer, i.e. emulsified asphalt layer 2, I type metalling 3 are used.Emulsified asphalt
2 spread quantity of layer are 1.8L/m2, 80 DEG C of spread temperature, the building stones spreading amount of I type metalling 3 is 9Kg/m2；
C. emulsified asphalt layer 2, I type metalling 3 can be rolled using pneumatic-tired rollers immediately after the completion of dispensing, gross area
It rolls one time；
D. stress absorbing layer operation finish after 2h can open to traffic, and carry out the construction of asphalt surface course 4.
Embodiment 3:
1. the preparation of emulsified asphalt
A. the preparation of raw material: AH-130 plain asphalt accounts for 70wt%, and imidazolines or amides emulsifier account for 2.0wt%,
Butadiene-vinylpyridine copylymer latex modifying agent accounts for 2.0wt%, and remaining oil asphalt additive accounts for 1wt%, and remaining ingredient is water and pH adjusting agent, wherein water
Using distilled water, pH adjusting agent is hydrochloric acid, by percentage to the quality；
B. asphalt additive described in a is added to plain asphalt to be uniformly mixed, and is heated to 135 DEG C；
C. emulsifier, modifying agent and water are weighed in proportion and prepares soap lye, and soap lye pH value is adjusted to 2.0 with acid, is then heated
To 50 DEG C；
D. the mixture of mentioned emulsifier soap lye and pitch and asphalt additive is passed sequentially through into colloid mill, is obtained after grinding
Emulsified asphalt finished product.
2. the construction of emulsified asphalt
It is illustrated in conjunction with construction procedure of the Fig. 1 to this example.
It a.1 is old asphalt pavement.Old pavement is cleaned using sweeper, and removes panel laitance, dust and other impurities,
Form coarse, drying operation surface；
B. synchronous macadam seal paver spread stress absorption layer material, i.e. emulsified asphalt layer 2, I type metalling 3, emulsification are used
2 spread quantity of bitumen layer is 2.2L/m2, 80 DEG C of spread temperature, the building stones spreading amount of I type metalling 3 is 11Kg/m2；
C. emulsified asphalt layer 2, I type metalling 3 can be rolled using pneumatic-tired rollers immediately after the completion of dispensing, gross area
It rolls one time；
D. stress absorbing layer operation finish after 2h can open to traffic, and carry out the construction of asphalt surface course 4.
Embodiment 4:
1. the preparation of emulsified asphalt
A. the preparation of raw material: AH-90 plain asphalt accounts for 62wt%, and fatty amines emulsifier accounts for 3.0wt%, and polychloroprene latex changes
Property agent account for 3.0wt%, waste cooking oils asphalt additive accounts for 4wt%, and remaining ingredient is water and pH adjusting agent, and wherein hydromining is spent
Ionized water, pH adjusting agent are acetic acid, by percentage to the quality；
B. asphalt additive described in a is added to plain asphalt to be uniformly mixed, and is heated to 135 DEG C；
C. emulsifier, modifying agent and water are weighed in proportion and prepares soap lye, and soap lye pH value is adjusted to 2.0 with acid, is then heated
To 50 DEG C；
D. the mixture of mentioned emulsifier soap lye and pitch and asphalt additive is passed sequentially through into colloid mill, is obtained after grinding
Emulsified asphalt finished product.
2. the construction of emulsified asphalt
It is illustrated in conjunction with construction procedure of the Fig. 2 to this example.
It a.1 is surface layer in pitch.Surface layer laitance, dust and other impurities in removing form coarse, drying operation surface；
B. emulsified asphalt layer 2, the II type metalling 3 of synchronous macadam seal paver spread stress absorbing layer, emulsified asphalt are used
2 spread quantity of layer are 1.4L/m2, 80 DEG C of spread temperature；The building stones spreading amount of II type metalling 3 is 5Kg/m2；
C. emulsified asphalt layer 2, II type metalling 3 are rolled using pneumatic-tired rollers immediately after the completion of dispensing, gross area
It rolls one time；
D. stress absorbing layer operation finish after 2h can open to traffic, and carry out the construction of asphalt uplayer 4.
Embodiment 5:
1. the preparation of emulsified asphalt
A. the preparation of raw material: AH-90 plain asphalt accounts for 59wt%, and oxygen amine is accounted for quaternary ammonium salt composite emulsifier
1.2wt%, styrene-butadiene latex and butadiene-vinylpyridine copylymer latex compound modifier account for 5wt%, and aromatic hydrocarbons extraction oil compounds pitch with furfural extract oil and adds
Agent is added to account for 8wt%, remaining ingredient is water and pH adjusting agent, and wherein water uses tap water, and pH adjusting agent is hydrochloric acid, with quality percentage
Than meter；
B. asphalt additive described in a is added to plain asphalt to be uniformly mixed, and is heated to 135 DEG C；
C. emulsifier, modifying agent and water are weighed in proportion and prepares soap lye, and soap lye pH value is adjusted to 2.0 with acid, is then heated
To 50 DEG C；
D. the mixture of mentioned emulsifier soap lye and pitch and asphalt additive is passed sequentially through into colloid mill, is obtained after grinding
Emulsified asphalt finished product.
2. the construction of emulsified asphalt
It is illustrated in conjunction with construction procedure of the Fig. 1 to this example.
It a.1 is old cement concrete road.Feather plucking is carried out to old pavement using sweeper, and removes panel laitance, dust and other impurities,
Form coarse, drying operation surface；
B. synchronous macadam seal paver spread stress absorbing layer, i.e. emulsified asphalt layer 2, II type metalling 3, emulsified asphalt are used
2 spread quantity of layer are 2.4L/m2, 80 DEG C of spread temperature, the building stones spreading amount of II type metalling 3 is 8Kg/m2；
C. emulsified asphalt layer 2, II type metalling 3 can be rolled using pneumatic-tired rollers immediately after the completion of dispensing, comprehensively
Product rolls one time；
D. stress absorbing layer operation finish after 2h can open to traffic, and carry out the construction of asphalt surface course 4.
Embodiment 6:
1. the preparation of emulsified asphalt
A. the preparation of raw material: AH-110 plain asphalt accounts for 66wt%, and lignin amine class emulsifier accounts for 1.5wt%, fourth pyrrole
Latex modified agent accounts for 3.0wt%, and bitumen regenerant class asphalt additive accounts for 3wt%, and remaining ingredient is water and pH adjusting agent, wherein
Water uses deionized water, and pH adjusting agent is hydrochloric acid, by percentage to the quality；
B. asphalt additive described in a is added to plain asphalt to be uniformly mixed, and is heated to 135 DEG C；
C. emulsifier, modifying agent and water are weighed in proportion and prepares soap lye, and soap lye pH value is adjusted to 2.0 with acid, is then heated
To 50 DEG C；
D. the mixture of mentioned emulsifier soap lye and pitch and asphalt additive is passed sequentially through into colloid mill, is obtained after grinding
Emulsified asphalt finished product.
2. the construction of emulsified asphalt
It is illustrated in conjunction with construction procedure of the Fig. 1 to this example.
It a.1 is old asphalt pavement.Old pavement is cleaned using sweeper, and removes panel laitance, dust and other impurities,
Form coarse, drying operation surface；
B. synchronous macadam seal paver spread stress absorption layer material, i.e. emulsified asphalt layer 2, II metalling 3, emulsification drip are used
2 spread quantity of cyan layer is 3.0L/m2, 80 DEG C of spread temperature, the building stones spreading amount of II type metalling 3 is 12Kg/m2；
C. emulsified asphalt layer 2, II type metalling 3 can be rolled using pneumatic-tired rollers immediately after the completion of dispensing, comprehensively
Product rolls one time；
D. stress absorbing layer operation finish after 2h can open to traffic, and carry out the construction of asphalt surface course 4.
The stress absorbing layer of the above embodiment of the present invention is as follows with the performance indicator of high solids content emulsified asphalt, is shown in Table 2 institutes
Show.The performance indicator that 2 stress absorbing layer high solids content emulsified asphalt of table reaches
As can be seen from the above table, the Saybolt viscosity that stress absorbing layer high solids content emulsified asphalt of the invention reaches
(50 DEG C) in 200s or more, solid content is within the scope of 67-75%.
Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, should fall within the scope of the present invention.
Claims (10)
1. a kind of stress absorbing layer high solids content emulsified asphalt, which is characterized in that pass through plain asphalt, asphalt additive, cream
Agent, modifying agent, water and pH adjusting agent are made for raw material, solid content 67-75%, the mass component ratio of the raw material are as follows:
Plain asphalt 50-70%, asphalt additive 1-12%, emulsifier 0.2-3.0%, modifying agent 2.0-10.0%, remaining as water and
PH adjusting agent.
2. stress absorbing layer according to claim 1 high solids content emulsified asphalt, which is characterized in that the common drip
Blueness is bi tumenf orr oad, and the emulsifier is cationic emulsifier, and the modifying agent is thermoplastic elastomer (TPE) class glue
Cream.
3. stress absorbing layer according to claim 2 high solids content emulsified asphalt, which is characterized in that the common drip
Blueness is any one of AH-50, AH-70, AH-90, AH-110 or AH-130.
4. stress absorbing layer according to claim 1 high solids content emulsified asphalt, which is characterized in that the pitch adds
Adding agent is that aromatic hydrocarbons extracts one or more of oil, furfural extract oil, waste cooking oils, remaining oil, bitumen regenerant out.
5. stress absorbing layer according to claim 2 high solids content emulsified asphalt, which is characterized in that the emulsifier
For one of alkyl polyamine class, oxygen amine, quaternary ammonium salt, fatty amines, lignin amine, imidazolines or amides or more
Kind.
6. stress absorbing layer according to claim 2 high solids content emulsified asphalt, which is characterized in that the modifying agent
For one of styrene-butadiene latex, NBR latex, butadiene-vinylpyridine copylymer latex, polychloroprene latex or a variety of.
7. stress absorbing layer according to claim 1 high solids content emulsified asphalt, which is characterized in that the water is certainly
Any one of water, industrial water, distilled water or deionized water；The pH adjusting agent be hydrochloric acid, formic acid, acetic acid or
Phosphoric acid.
8. the preparation method of the stress absorbing layer high solids content emulsified asphalt as described in claim 1-7 any one, special
Sign is, comprising the following steps:
1) plain asphalt is heated to 120-150 DEG C, asphalt additive is proportionally added into plain asphalt and is uniformly mixing to obtain
The mixture of pitch and asphalt additive；
2) emulsifier is configured to aqueous solution by the 0.2-3.0% of emulsified asphalt gross mass, and modifying agent is added, and emulsifier soap is made
Emulsifier soap lye pH value is adjusted to 1.5-2.5 with pH adjusting agent, is then heated to 35-60 DEG C by liquid；
3) mixture of mentioned emulsifier soap lye and pitch and asphalt additive is passed sequentially through into colloid mill, is emulsified after grinding
Pitch finished product.
9. utilizing the construction method of stress absorbing layer high solids content emulsified asphalt obtained by claim 8, which is characterized in that
The following steps are included:
1) control of emulsified asphalt spread temperature is at 80 ± 5 DEG C, and emulsified asphalt spread quantity is 1.2-2.2L/m when using I type rubble2,
Emulsified asphalt spread quantity is 1.4-3.0L/m when using II type rubble2；
2) synchronous macadam seal paver enters designated position, start emulsified asphalt spread and crushed stone spreading and according to calibration speed at the uniform velocity
Traveling；
3) it is rolled immediately using pneumatic-tired rollers after the completion of emulsified asphalt and crushed stone spreading, gross area rolls one time；Operation
After the evaporation of face moisture, preferably roll again one time, it is extra after having pressed to gather materials and handle in time；
The intensity of the rubble meets current J TG F40 standard requirements, and specification meets to be required as defined in table:
Wherein I type crushed stone spreading amount is 4-11Kg/m2, II type crushed stone spreading amount is 5-12Kg/m2, part leakage is spread or spread more should be
Artificial treatment before emulsified asphalt is demulsified.
10. the stress absorbing layer according to claim 9 construction method of high solids content emulsified asphalt, which is characterized in that
When emulsified asphalt spread or/and crushed stone spreading suspend for some reason or construct end, and vehicle is caused to halt, emulsification is closed in time
Bituminous matter distributor and road-metal spreading apparatus when constructing again, should continue emulsified asphalt spread in transverse joint edge and rubble spread
Cloth avoids repeating to spill/dispense；The stress absorbing layer uses framing operation, and Longitudinal Construction Jointing should ensure that sub-layer area is complete
Covering；It when defect occur in emulsified asphalt spread or crushed stone spreading, should manually handle in time, emulsified asphalt accumulation, which should give, scrapes
It removes, rubble processing should be completed before emulsified asphalt is demulsified.
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| CN114892465A (en) * | 2022-04-29 | 2022-08-12 | 北京智华通科技有限公司 | Asphalt surface course with convertible functions, pavement structure and construction method |
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