CN105968293B - A kind of modified polyurethane emulsified bitulith and its preparation method and application - Google Patents
A kind of modified polyurethane emulsified bitulith and its preparation method and application Download PDFInfo
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- CN105968293B CN105968293B CN201610322533.0A CN201610322533A CN105968293B CN 105968293 B CN105968293 B CN 105968293B CN 201610322533 A CN201610322533 A CN 201610322533A CN 105968293 B CN105968293 B CN 105968293B
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4833—Polyethers containing oxyethylene units
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/282—Polyurethanes; Polyisocyanates
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- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
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- C08G18/4808—Mixtures of two or more polyetherdiols
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/08—Polyurethanes from polyethers
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
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- C08L2205/00—Polymer mixtures characterised by other features
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- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The present invention relates to field of road, a kind of modified polyurethane emulsified bitulith and its preparation method and application is disclosed.The invention discloses a kind of polyurethane slurries and its applications.The invention also discloses a kind of modified polyurethane emulsified bituliths, by weight, including gather materials 100 parts, 8~11 parts of modified emulsifying asphalt and 0~4 part of water；Wherein, the modified emulsifying asphalt includes: emulsified asphalt and polyurethane slurries, by weight, 100 parts and 1~15 part of polyurethane slurries of emulsified asphalt.The invention also discloses the application of the preparation method of the modified polyurethane emulsified bitulith and the modified polyurethane emulsified bitulith in road surface pit repairing and pavement crack repair.Polyurethane slurries in modified polyurethane emulsified bitulith disclosed by the invention can absorb the moisture in emulsified asphalt and promote emulsified asphalt demulsification, and can control the intensity formation time of Emulsified Asphalt Mixture, have better pavement performance.
Description
Technical field
The present invention relates to field of road, in particular to a kind of modified polyurethane emulsified bitulith and its preparation side
Method and application.
Background technique
As the increase and vehicle overload phenomenon of the volume of traffic are got worse, it is easy that bituminous pavement is made to occur disease too early, it is special
Be not in length and breadth crack, pit slot the problems such as.If handled not in time, moisture penetration to surface layer, base can accelerate pavement destruction.Existing road
Face patching material mainly has a heated bitumen and two kinds of emulsified asphalt, heated bitumen patching material there is waste of energy, pollution environment and
The problems such as construction is inconvenient；Emulsified asphalt patching material there is with pit slot surrounding bond strength is insufficient, de-emulsification speed is slow, intensity at
The problems such as type is slow and water resistant removing is poor, therefore be restricted in actual use.
In order to improve the performance of emulsified asphalt, often blast blending or modifying agent into pitch.Existing polyurethanes
Modified emulsifying asphalt mainly uses adhesive for polyurethane to be modified to emulsified asphalt, and effect is only when moisture is evaporated
Intensity is provided by gluing after complete, adhesive for polyurethane can not absorb the moisture in emulsified asphalt and promote emulsified asphalt demulsification,
The intensity that Emulsified Asphalt Mixture can not be controlled forms the time.
Therefore, a kind of new polyurethane modified emulsifying asphalt is developed, it is modified for solving polyurethanes in the prior art
Emulsified asphalt there is the moisture that cannot absorb in emulsified asphalt promote emulsified asphalt demulsification, not can control emulsified asphalt mixing
The intensity of material forms the technological deficiency of time, becomes those skilled in the art's urgent problem to be solved.
Summary of the invention
In view of this, the invention discloses a kind of modified polyurethane emulsified bitulith and its preparation method and application,
It is broken for solving the moisture promotion emulsified asphalt that polyurethanes modified emulsifying asphalt in the prior art cannot absorb in emulsified asphalt
Cream, and not can control Emulsified Asphalt Mixture intensity formed the time the shortcomings that.
The invention discloses a kind of polyurethane slurries, including base polyurethane prepolymer for use as and auxiliary agent；
The auxiliary agent include: in catalyst or retarder any one, solvent, defoaming agent, surfactant and plasticising
Agent；
Wherein, by weight, 100 parts of base polyurethane prepolymer for use as, 0~1.5 part of catalyst, 5~15 parts of solvent, defoaming agent
0.2~1 part, 0.5~1 part of surfactant and 10~25 parts of plasticizer；
Or by weight, 100 parts of base polyurethane prepolymer for use as, 0~1 part of retarder, 5~15 parts of solvent, defoaming agent 0.2~1
Part, 0.5~1 part of surfactant and 10~25 parts of plasticizer.
Preferably, the solvent is any one in dimethylbenzene, cyclohexanone, acetone and toluene；
The catalyst be triethylamine, triethanolamine, stannous chloride and dibutyl tin dilaurate in any one or
Two kinds；
The retarder is benzene sulfonyl chloride or paratoluensulfonyl chloride；
The defoaming agent is BYK-066N；
The surfactant is water-soluble silicon oil；
The plasticizer is dibutyl phthalate or dioctyl phthalate.
Preferably, the base polyurethane prepolymer for use as includes: polyisocyanates, the pure and mild acetone of polyether polyols；
Wherein, by weight, 100 parts of polyisocyanates, 29~90 parts of polyether polyol and 3~8 parts of acetone.
Preferably, the polyisocyanates is that toluene di-isocyanate(TDI), methyl diphenylene diisocyanate or more phenyl are more
Any one in isocyanates；
The polyether polyol is N-204 polyethers, N-303 polyethers, propylene oxide polyether, ethylene oxide polyethers, epoxy third
Any one in alkane ethylene oxide admixtured polyether or two kinds.
The invention also discloses a kind of modified polyurethane emulsified bituliths, by weight, comprising: gather materials 100 parts,
8~11 parts and 0~4 part of water of modified emulsifying asphalt；
Wherein, the modified emulsifying asphalt includes: emulsified asphalt and the polyurethane slurries, by weight, emulsification drip
Green 100 parts and 1~15 part of the polyurethane slurries.
Preferably, the emulsified asphalt is cationic emulsified bitumen.
The invention discloses the preparation methods of the modified polyurethane emulsified bitulith, comprising the following steps:
Step 1: preparing base polyurethane prepolymer for use as；
Step 2: the base polyurethane prepolymer for use as and auxiliary agent are mixed with polyurethane slurries；
Step 3: the polyurethane slurries and emulsified asphalt are mixed with modified emulsifying asphalt；
Step 4: by the modified emulsifying asphalt, gathering materials is mixed to get product with water, i.e., the described modified polyurethane emulsification drip
Green concrete.
Preferably, the preparation method comprises the following steps:
Polyisocyanates and polyether polyol are mixed, 50~60 DEG C are reacted 2.5~3 hours, are diluted after being cooled to room temperature
Obtain the base polyurethane prepolymer for use as；
Step 2: by the base polyurethane prepolymer for use as and catalyst or retarder any one, solvent, defoaming agent, table
Face activating agent and plasticizer mix in proportion, stir evenly, and obtain the polyurethane slurries, are sealed；
Step 3: the polyurethane slurries are mixed with emulsified asphalt, stirring obtains the modified emulsifying drip for 20~30 seconds
It is green；
Intermediate product is mixed 1~2 minute to obtain with water Step 4: will gather materials, by the modified emulsifying asphalt and centre
Product is mixed 30 seconds, obtains product, i.e., the described modified polyurethane emulsified bitulith.
The invention discloses the polyurethane slurries to prepare the application in emulsified bitulith.
The invention discloses modified poly- ammonia made from the modified polyurethane emulsified bitulith and the preparation method
Application of the ester emulsified bitulith in road surface pit slot cold repair and pavement crack cold repair.
Base polyurethane prepolymer for use as synthetic reaction formula:
The cross-linking reaction being related in modified polyurethane emulsified bitulith is as follows:
Polyurethane slurries are reacted with the water in emulsified asphalt, generate carbon dioxide and urea bond
Cross-linked gel body is further generated later
When construction, road surface pit slot is cleared up first, pit slot cut and clean up slot bottom, then with brush hole
Gathering materials for slot surrounding and pit slot bottom is wet, but slot bottom cannot have ponding, then pour into mixture, the polyurethane in mixture
The reaction of the water of slurries and cell wall, plays cementation, makes mixture and pit slot that an entirety be more readily formed.Polyurethane slurries energy
It is reacted with the water in emulsified asphalt, consumes the moisture in emulsified asphalt, promoting to generate while emulsified asphalt demulsification can glue
The solidfied material for tying surface of aggregate, asphalt from asphalt mixture matter can partial penetration to polyurethane liquid solidfied material
In achieve the effect that collaborative work.
Polyurethane liquid is reacting heat release simultaneously with the water in emulsified asphalt, and exothermic heat of reaction enhances the mixed of mixture
Dissolubility accelerates emulsified asphalt demulsification, and mixture intensity forms the time for shortening barring traffic fastly；While polyurethane slurries are certainly
Body crosslinking curing generates crosslinking net solidfied material, is interspersed in one entirety of formation in mixture, improves the globality of mixture
And integral strength.And urethane cures object itself is functional, to the anti-aging of emulsified bitulith, resist chemical, resistance to
Fatigue and toughness improve.Contain carbamate groups, urea groups, ehter bond in the solidfied material of polyurethane liquid simultaneously
Isopolarity group, it is very strong to the adhesion gathered materials, improve the water resistant stripping performance of mixture.
It is measured through test, modified polyurethane emulsified asphalt disclosed by the invention is to gathering materials with good adhesion；Right
When road surface carries out cementation of fissures repairing, when polyurethane slurries disclosed by the invention control demulsification while emulsified asphalt can be promoted to be demulsified
Between, and the repair efficiency of the road pavement cementation of fissures is good；In Marshall Test, modified polyurethane emulsified asphalt coagulation disclosed by the invention
Soil shows good performance, is suitble to patch repair disease.
Outstanding advantages of the invention and the utility model has the advantages that
(1) polyurethane slurries can be reacted with the water in emulsified asphalt, consume the moisture in emulsified asphalt, promote emulsification drip
Blueness demulsification accelerates emulsified asphalt demulsification, and mixture intensity forms the time for shortening barring traffic fastly；
(2) solidification of polyurethane slurries self-crosslinking generates crosslinking net solidfied material after reacting, and is interspersed in mixture and is formed
One entirety, improves the globality of mixture.Contain carbamate groups, urea in the solidfied material of polyurethane liquid simultaneously
Base, ehter bond isopolarity group, it is very strong to the adhesion gathered materials, improve the water resistant stripping performance of mixture；
(3) when pit slot is repaired, cell wall need to be only scrubbed with water, a small amount of moisture can be emulsified with modified polyurethane around pit slot drips
Green concrete reacts gluing together, and mixture and former road surface is made to form an entirety, guarantees to go back while pit slot repairing quality
It can keep clean and environmental protection；
(4) auxiliary agent added in polyurethane slurries can control the time that reaction occurs, and guarantee polyurethane after the completion of construction
Slurries just start to react with water, since mixture moisture reduction causes the problem of workability difference when avoiding the occurrence of construction；
(5) polyurethane liquid modified emulsifying asphalt can be used as a kind of pavement crack cementation of fissures material, the cementation of fissures material production side
Just, construction is simple, is influenced small by weather, and the emulsified asphalt demulsification time is controllable, and permeability is strong；
(6) adhesive force for enhancing pitch and gathering materials improves the water resistant stripping ability and Nai Gao of modified asphalt mixture
Warm nature energy, the adhesive property of virgin material and old material when increasing pit repairing, construction is simple are convenient.
Specific embodiment
The invention discloses a kind of modified polyurethane emulsified bituliths and its preparation method and application, existing for solving
There is the moisture that polyurethanes modified emulsifying asphalt cannot absorb in emulsified asphalt in technology to promote emulsified asphalt demulsification, and cannot
The shortcomings that controlling the intensity formation time of Emulsified Asphalt Mixture.
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment 1
It prepares base polyurethane prepolymer for use as: 100g toluene di-isocyanate(TDI), 57g N-204 polyethers and 5g acetone is weighed, toluene
Diisocyanate pours into porcelain enamel barrel, and N-204 polyethers is added, stirs evenly, and 50 DEG C are reacted 2.5 hours, is cooled to room temperature, adds
Enter acetone dilution, obtains base polyurethane prepolymer for use as；
Prepare polyurethane slurries: 100g base polyurethane prepolymer for use as, 5g acetone (solvent), 1g triethylamine (catalyst), 1g is poly-
Diisobutyl ketone (defoaming agent), 0.8g water-soluble silicon oil (surfactant) and the 20g dibutyl phthalate of siloxanes (increase
Mould agent) mixing, it stirs evenly, products therefrom is polyurethane slurries, is sealed；
It prepares modified emulsifying asphalt: 100 parts of emulsified asphalts and 1 part of polyurethane slurries being mixed, stirring is modified for 20 seconds
Emulsified asphalt；
It prepares modified polyurethane emulsified bitulith: 100 parts being gathered materials and is mixed 1.5 minutes intermediate with 1 part of water
10 parts of modified emulsifying asphalts and intermediate product are mixed 30 seconds immediately for product, products obtained therefrom, that is, modified polyurethane emulsification drip
Green concrete.
Embodiment 2
It prepares base polyurethane prepolymer for use as: it is poly- to weigh 100g polyphenyl polyisocyanate, 18g N-303 polyethers and 72g N-303
Ether and 8g acetone, polyphenyl polyisocyanate are poured into porcelain enamel barrel, and N-204 polyethers and N-303 polyethers is added, stirs evenly,
60 DEG C are reacted 3 hours, are cooled to room temperature, and acetone dilution is added, obtains base polyurethane prepolymer for use as；
Prepare polyurethane slurries: by 100g base polyurethane prepolymer for use as, 15g toluene (solvent), 0.2g polysiloxanes two isobutyls
Ketone (defoaming agent), 0.5g water-soluble silicon oil (surfactant) and 10g dibutyl phthalate (plasticizer) mixing, stirring are equal
Even, products therefrom is polyurethane slurries, is sealed；
It prepares modified emulsifying asphalt: 100 parts of emulsified asphalts and 15 parts of polyurethane slurries being mixed, stirring is modified for 30 seconds
Emulsified asphalt；
It prepares modified polyurethane emulsified bitulith: immediately 11 parts of modified emulsifying asphalts gathering materials to mix with 100 parts and stir
It mixes 30 seconds, products obtained therefrom, that is, modified polyurethane emulsified bitulith.
Embodiment 3
It prepares base polyurethane prepolymer for use as: weighing 100g methyl diphenylene diisocyanate, 29g propylene oxide polyether and 3g third
Ketone pours into methyl diphenylene diisocyanate in porcelain enamel barrel, and propylene oxide polyether is added, stirs evenly, and 55 DEG C of reactions 2.5 are small
When, it is cooled to room temperature, acetone dilution is added, obtains base polyurethane prepolymer for use as；
Prepare polyurethane slurries: by 100g base polyurethane prepolymer for use as, 5g acetone (solvent), 1.5g triethylamine (catalyst),
Diisobutyl ketone (defoaming agent), 1g water-soluble silicon oil (surfactant) and the 25g dibutyl phthalate of 0.8g polysiloxanes
(plasticizer) mixing, stirs evenly, and products therefrom is polyurethane slurries, is sealed；
It prepares modified emulsifying asphalt: 100 parts of emulsified asphalts and 8 parts of polyurethane slurries being mixed, stirring is modified for 25 seconds
Emulsified asphalt；
It prepares modified polyurethane emulsified bitulith: 100 parts being gathered materials, intermediate production is mixed 1 minute to obtain with 4 parts of water
8 parts of modified emulsifying asphalts and intermediate product are mixed 30 seconds immediately for object, and products obtained therefrom, that is, modified polyurethane emulsified asphalt is mixed
Solidifying soil.
Embodiment 4
It prepares base polyurethane prepolymer for use as: 100g toluene di-isocyanate(TDI), 29g ethylene oxide polyethers and 3g acetone is weighed, first
Phenylene diisocyanate pours into porcelain enamel barrel, and ethylene oxide polyethers is added, stirs evenly, and 50 DEG C are reacted 2.5 hours, is cooled to often
Temperature is added acetone dilution, obtains base polyurethane prepolymer for use as；
Prepare polyurethane slurries: by 100g base polyurethane prepolymer for use as, 5g acetone (solvent), 1.5g triethylamine (catalyst), 1g
Diisobutyl ketone (defoaming agent), 0.8g water-soluble silicon oil (surfactant) and the 20g dioctyl phthalate of polysiloxanes
(plasticizer) mixing, stirs evenly, and products therefrom is polyurethane slurries, is sealed；
It prepares modified emulsifying asphalt: 100 parts of emulsified asphalts and 8 parts of polyurethane slurries being mixed, stirring is modified for 25 seconds
Emulsified asphalt；
It prepares modified polyurethane emulsified bitulith: 100 parts being gathered materials, intermediate production is mixed 2 minutes to obtain with 2 parts of water
Object 11 parts of modified emulsifying asphalts and intermediate product is mixed 30 seconds immediately, products obtained therefrom, that is, modified polyurethane emulsified asphalt
Concrete.
Embodiment 5
It prepares base polyurethane prepolymer for use as: 100g toluene di-isocyanate(TDI), 57g N-204 polyethers and 5g acetone is weighed, toluene
Diisocyanate pours into porcelain enamel barrel, and N-204 polyethers is added, stirs evenly, and 50 DEG C are reacted 2.5 hours, is cooled to room temperature, adds
Enter acetone dilution, obtains base polyurethane prepolymer for use as；
Prepare polyurethane slurries: by 100g base polyurethane prepolymer for use as, 5g acetone (solvent), 0.8g paratoluensulfonyl chloride (slow setting
Agent), the diisobutyl ketone (defoaming agent) of 1g polysiloxanes, 0.8g water-soluble silicon oil (surfactant) and 20g phthalic acid two
Butyl ester (plasticizer) mixing, stirs evenly, and products therefrom is polyurethane slurries, is sealed；
It prepares modified emulsifying asphalt: 100 parts of emulsified asphalts and 1 part of polyurethane slurries being mixed, stirring is modified for 30 seconds
Emulsified asphalt；
It prepares modified polyurethane emulsified bitulith: 100 parts being gathered materials and is mixed 2 minutes intermediate with 2.5 parts of water
10 parts of modified emulsifying asphalts and intermediate product are mixed 30 seconds immediately for product, products obtained therefrom, that is, modified polyurethane emulsification drip
Green concrete.
Embodiment 6
Prepare base polyurethane prepolymer for use as: weigh 100g toluene di-isocyanate(TDI), 57g propylene oxide ethylene oxide admixtured polyether and
5g acetone, toluene di-isocyanate(TDI) is poured into porcelain enamel barrel, and propylene oxide ethylene oxide admixtured polyether is added, stirs evenly, 50
DEG C reaction 2.5 hours, be cooled to room temperature, be added acetone dilution, obtain base polyurethane prepolymer for use as；
Prepare polyurethane slurries: by 100g base polyurethane prepolymer for use as, 5g acetone (solvent), 0.2g polysiloxanes diisobutyl ketone
(defoaming agent), 0.5g water-soluble silicon oil (surfactant) and 10g dibutyl phthalate (plasticizer) mixing, stirring are equal
Even, products therefrom is polyurethane slurries, is sealed；
It prepares modified emulsifying asphalt: 100 parts of emulsified asphalts and 8 parts of polyurethane slurries being mixed, stirring is modified for 25 seconds
Emulsified asphalt；
It prepares modified polyurethane emulsified bitulith: 100 parts being gathered materials, intermediate production is mixed 1 minute to obtain with 4 parts of water
Object 10 parts of modified emulsifying asphalts and intermediate product is mixed 30 seconds immediately, products obtained therefrom, that is, modified polyurethane emulsified asphalt
Concrete.
Embodiment 7
It prepares base polyurethane prepolymer for use as: 100g toluene di-isocyanate(TDI), 29gN-303 polyethers and 3g acetone is weighed, toluene two
Isocyanates pours into porcelain enamel barrel, and N-303 polyethers is added, stirs evenly, and 50 DEG C are reacted 2.5 hours, are cooled to room temperature, and is added
Acetone dilution, obtains base polyurethane prepolymer for use as；
Prepare polyurethane slurries: by 100g base polyurethane prepolymer for use as, 5g acetone (solvent), 1g paratoluensulfonyl chloride (slow setting
Agent), the diisobutyl ketone (defoaming agent) of 0.5g polysiloxanes, 1g water-soluble silicon oil (surfactant) and 25g phthalic acid two
Butyl ester (plasticizer) mixing, stirs evenly, and products therefrom is polyurethane slurries, is sealed；
It prepares modified emulsifying asphalt: 100 parts of emulsified asphalts and 8 parts of polyurethane slurries being mixed, stirring is modified for 25 seconds
Emulsified asphalt；
It prepares modified polyurethane emulsified bitulith: 100 parts being gathered materials, intermediate production is mixed 1 minute to obtain with 4 parts of water
Object 10 parts of modified emulsifying asphalts and intermediate product is mixed 30 seconds immediately, products obtained therefrom, that is, modified polyurethane emulsified asphalt
Concrete.
The test of 8 modified emulsifying asphalt adhesion of embodiment
The present embodiment tests influence of the modified emulsifying asphalt to adhesion of gathering materials, test method according to " highway asphalt and
Asphalt Mixture Experiment regulation " in T0654- emulsified asphalt and coarse aggregate adhesion assay, base polyurethane prepolymer for use as and polyurethane slurry
The preparation method is the same as that of Example 1 for liquid.Test specimen is divided into 6 groups, wherein 1 group is control group, remaining 5 groups are test group.By weight
Part meter, emulsified asphalt is 100 parts, and the polyurethane slurries of control group are 0 part, and the polyurethane slurries of test group 1~5 are respectively 1
Part, 3 parts, 5 parts, 7 parts and 9 parts, i.e. the polyurethane slurries volume of test group 1~5 account for respectively emulsified asphalt quality 1%, 3%,
5%, 7% and 9%.Test result is as shown in table 1.
Influence of 1 modified emulsifying asphalt of table to adhesion of gathering materials
| Emulsified asphalt | Polyurethane slurries | Gather materials and averagely wraps up in outside of belly product (%) | |
| Control group | 100 | 0 | 96 |
| Test group 1 | 100 | 1 | 96 |
| Test group 2 | 100 | 3 | 98 |
| Test group 3 | 100 | 5 | 100 |
| Test group 4 | 100 | 7 | 100 |
| Test group 5 | 100 | 9 | 96 |
In bituminous pavement reparation, it is also the most thorny issue that Moisture Damage, which is urgently to be resolved,.It can be with from the test result of table 1
Find out, when the volume of polyurethane slurries in emulsified asphalt is 3~7%, modified emulsifying asphalt is best to the adhesion gathered materials.Change
Property emulsified asphalt the water resistant stripping performance of mixture can be improved to the adhesion enhancing gathered materials, improve the anti-water damage energy of mixture
Power.The base polyurethane prepolymer for use as and polyurethane slurries prepared with embodiment 2~4 repeats same test, obtains same conclusion.
The repairing test of 9 pavement seam filling of embodiment
When crack disease occurs in road surface, the modified emulsifying asphalt that polyurethane slurries and emulsified asphalt preparation can be used is carried out
It squeegees, the preparation method is the same as that of Example 1 for base polyurethane prepolymer for use as and polyurethane slurries, when preparing polyurethane slurries using catalysis
Agent promotes polyurethane slurries that can quickly react with water, makes emulsified asphalt fast emulsion breaking to reach the repair efficiency in road pavement crack.
Test specimen is divided into 10 groups, wherein 1 group is control group, remaining 9 groups are test group.By weight, emulsified asphalt is 100
Part, the polyurethane slurries of control group are 0 part, and the polyurethane slurries of test group 1~9 are respectively 1 part, 3 parts, 5 parts, 7 parts, 9 parts, 11
Part, 13 parts, 15 parts and 17 parts, i.e., volume of the polyurethane slurries of test group 1~9 in emulsified asphalt be respectively 1%, 3%,
5%, 7%, 9%, 11%, 13%, 15% and 17%.Test result is as shown in table 2.
From test result as can be seen that when carrying out pavement seam filling repairing using modified emulsifying asphalt prepared by embodiment 1,
Demulsification time when volume of the polyurethane slurries in emulsified asphalt is 5~15% is controllable and cementation of fissures repair efficiency is good, very few
Or excessive polyurethane slurries volume can all influence the repair efficiency in road pavement crack.The auxiliary agent added in polyurethane slurries can
The time that control reaction occurs, polyurethane slurries just start to react with water after the completion of guaranteeing construction, when avoiding the occurrence of construction due to
Mixture moisture reduces the problem for causing workability difference.The base polyurethane prepolymer for use as and polyurethane slurries weight prepared with embodiment 2~4
Multiple same test, obtains same conclusion.
The repairing test of 2 pavement seam filling of table
10 Marshall Test of embodiment
When road surface breakage is more serious, preferably carried out with mixture, that is, modified polyurethane disclosed by the invention emulsified bitulith
Repairing is suitably gathered materials according to pit slot size according to " standard specification for construction and acceptance of highway asphalt pavement " selection, and the present embodiment gathers materials
Using limestone, the preparation method of base polyurethane prepolymer for use as and polyurethane slurries is used with embodiment 5 when preparing polyurethane slurries
Retarder guarantees that polyurethane slurries just start to react with the water in emulsified asphalt after the completion of construction, form intensity, are not in
Moisture reduces due to influences the workability of construction when construction.Test specimen is divided into 6 groups, wherein 1 group be control group, remaining 5 groups
For test group, the parts by weight of emulsified asphalt and polyurethane slurries are with table 1, i.e. the polyurethane slurries of control group in every group of sample
0 part, the polyurethane slurries of test group 2~5 are respectively 1 part, 3 parts, 5 parts, 7 parts and 9 parts, i.e. the polyurethane slurries of test group 1~5
Volume accounts for 1%, 3%, 5%, 7% and the 9% of emulsified asphalt quality respectively.After preparing 6 groups of modified emulsifying asphalts, every group of sample
By gather materials 100 parts, 10 parts of modified emulsifying asphalt and 1 part of water of parts by weight prepare modified polyurethane emulsified bitulith.
Test method according to cold repairing asphalt mixture Marshall method in " standard specification for construction and acceptance of highway asphalt pavement ",
The concrete 1180g for weighing above-mentioned preparation is fitted into die trial at normal temperature, two-sided respectively to hit 50 times in fact, together with die trial with side
It is for 24 hours, two-sided again after taking-up respectively to hit 25 times in fact that face setting mode sets health in 110 degrees Celsius of baking ovens, then at room temperature together with die trial
Erect place for 24 hours, after demoulding in 60 degrees Celsius of thermostatic water baths health 30min, then carry out Marshall Test.Soak Marshall
Test and measurement dynamic stability test are according to hot-mix asphalt mixture test operation.Test result is as shown in table 3:
3 modified polyurethane emulsified bitulith performance test of table
As can be seen that the performance of test group 2, test group 3 and test group 4 is best from test result, i.e., when polyurethane is starched
Liquid is that prepared concrete performance is best between 3~7% in the volume in emulsified asphalt, stability, flow valuve, immersion Marshall
Value and dynamic stability are all satisfied code requirement.Dynamic stability height illustrate when volume of the polyurethane slurries in emulsified asphalt be 3~
The high-temperature stability of prepared concrete is good between 7%, advantageously ensures that mixture works normally during the broiling summer.In conjunction with
8 adhesion of embodiment test as a result, when polyurethane slurries the volume in emulsified asphalt be 3~7% between, prepared changes
Property emulsified asphalt adhesion and prepared concrete performance it is best, be suitble to patch repair disease.With 6 He of embodiment
Base polyurethane prepolymer for use as and polyurethane slurries prepared by embodiment 7 repeats above-mentioned test, obtains same conclusion.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of polyurethane slurries characterized by comprising base polyurethane prepolymer for use as and auxiliary agent；
The auxiliary agent include: in catalyst or retarder any one, solvent, defoaming agent, surfactant and plasticizer；
Wherein, by weight, 100 parts of base polyurethane prepolymer for use as, 0~1.5 part of catalyst, 5~15 parts of solvent, defoaming agent 0.2~1
Part, 0.5~1 part of surfactant and 10~25 parts of plasticizer；
Or by weight, 100 parts of base polyurethane prepolymer for use as, 0~1 part of retarder, 5~15 parts of solvent, 0.2~1 part of defoaming agent, table
0.5~1 part and 10~25 parts of plasticizer of face activating agent；
The solvent is any one in dimethylbenzene, cyclohexanone, acetone and toluene；
The catalyst is any one or two kinds in triethylamine, triethanolamine, stannous chloride and dibutyl tin dilaurate；
The retarder is benzene sulfonyl chloride or paratoluensulfonyl chloride；
The defoaming agent is BYK-066N；
The surfactant is water-soluble silicon oil；
The plasticizer is dibutyl phthalate or dioctyl phthalate；
The base polyurethane prepolymer for use as includes: polyisocyanates, the pure and mild acetone of polyether polyols；
Wherein, by weight, 100 parts of polyisocyanates, 29~90 parts of polyether polyol and 3~8 parts of acetone.
2. polyurethane slurries according to claim 1, which is characterized in that the polyisocyanates is toluene diisocynate
Any one in ester, methyl diphenylene diisocyanate or polyphenyl polyisocyanate；
The polyether polyol is N-204 polyethers, N-303 polyethers, propylene oxide polyether, ethylene oxide polyethers, propylene oxide ring
Any one in oxidative ethane admixtured polyether or two kinds.
3. a kind of modified polyurethane emulsified bitulith, which is characterized in that by weight, comprising: gather materials 100 parts, modification
8~11 parts and 0~4 part of water of emulsified asphalt；
Wherein, the modified emulsifying asphalt includes: emulsified asphalt and polyurethane slurries of any of claims 1 or 2, by weight
1~15 part of meter, 100 parts of emulsified asphalt and the polyurethane slurries.
4. modified polyurethane emulsified bitulith according to claim 3, which is characterized in that the emulsified asphalt is sun
Ion emulsified asphalt.
5. the preparation method of modified polyurethane emulsified bitulith described in a kind of claim 3 or 4, which is characterized in that packet
Include following steps:
Step 1: preparing base polyurethane prepolymer for use as；
Step 2: the base polyurethane prepolymer for use as and auxiliary agent are mixed with polyurethane slurries；
Step 3: the polyurethane slurries and emulsified asphalt are mixed with modified emulsifying asphalt；
Step 4: by the modified emulsifying asphalt, gathering materials is mixed to get product with water, i.e., the described modified polyurethane emulsified asphalt is mixed
Solidifying soil.
6. preparation method according to claim 5, which comprises the following steps:
Step 1: polyisocyanates and polyether polyol are mixed, 50~60 DEG C are reacted 2.5~3 hours, are cooled to room temperature rear dilute
It releases to obtain the base polyurethane prepolymer for use as；
Step 2: by the base polyurethane prepolymer for use as and catalyst or retarder any one, solvent, defoaming agent, surface it is living
Property agent and plasticizer mix in proportion, stir evenly, obtain the polyurethane slurries, are sealed；
Step 3: the polyurethane slurries are mixed with emulsified asphalt, stirring obtains the modified emulsifying asphalt in 20~30 seconds；
Intermediate product is mixed 1~2 minute to obtain with water Step 4: will gather materials, by the modified emulsifying asphalt and intermediate product
It is mixed 30 seconds, obtains product, i.e., the described modified polyurethane emulsified bitulith.
7. polyurethane slurries of any of claims 1 or 2 are preparing the application in emulsified bitulith.
8. modified polyurethane emulsified bitulith and preparation method described in claim 5 or 6 described in claim 3 or 4
Application of the modified polyurethane emulsified bitulith obtained in road surface pit repairing and pavement crack repair.
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| CN110079103A (en) * | 2019-03-22 | 2019-08-02 | 广东工业大学 | A kind of SH modified emulsifying asphalt and its preparation method and application |
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| CN113668324A (en) * | 2021-08-16 | 2021-11-19 | 宁波路宝科技实业集团有限公司 | Pavement repairing method |
| CN114853390B (en) * | 2022-05-12 | 2023-04-18 | 泰州职业技术学院 | Modified emulsified asphalt cold-mixing repeated regeneration aggregate pavement patching material and preparation method thereof |
| CN114751769B (en) * | 2022-05-24 | 2023-03-17 | 南京盛科道路新材料科技有限公司 | Anti-rutting pavement asphalt mixture and preparation method thereof |
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