CN102127365A - Hydrophobic coating capable of lowering adhesion of ice layers for asphalt pavements - Google Patents
Hydrophobic coating capable of lowering adhesion of ice layers for asphalt pavements Download PDFInfo
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- CN102127365A CN102127365A CN2011100299081A CN201110029908A CN102127365A CN 102127365 A CN102127365 A CN 102127365A CN 2011100299081 A CN2011100299081 A CN 2011100299081A CN 201110029908 A CN201110029908 A CN 201110029908A CN 102127365 A CN102127365 A CN 102127365A
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Abstract
The invention relates to hydrophobic coating capable of lowering the adhesion of ice layers for asphalt pavements and relates to highway, ramps, overhead roads, bridge surfaces and other asphalt pavements. The invention provides double-component organic silicon rubber coating, which comprises components A and B, wherein the component A mainly comprises 107 organic silicon rubber emulsion, a reinforcing agent, a filler, a catalyst, a film-forming agent, a defoamer and the like; the component B comprises organic silicon crosslinking agent having multiple functional groups, silane coupling agent and the like; and a dispersion medium is alkaline distilled water or deionized water. When the coating is sprayed or brushed on the asphalt pavements and part of the coating permeates into the structural gaps of the asphalt pavements or into the surface of the aggregate, hydrophobic films are formed on the surface of the asphalt pavements. The coating can obviously reduce the adhesion of the ice layers for the asphalt pavements, so that the ice layers on the asphalt pavements can be removed easily in winter. The coating has high permeability and adhesion force for the asphalt pavements and high wear resistance and antiskid performance. In addition, the construction technique is simple, quick and widely applicable.
Description
Technical field
The present invention relates to a kind ofly can effectively reduce cryosphere and the adhering hydrophobic coating of bituminous pavement, by apply a layered low-surface energy hydrophobic coating at bituminous pavement, can significantly reduce the winter cryosphere to the sticking power of bituminous pavement, make power shovel remove or tire traditional deicing mode such as rolls and can remove the road surface accumulated ice easily.
Background technology
In the winter time, vehicular traffic safety in the cryosphere serious threat of bituminous pavement formation.Particularly cold moist season, the thin ice that the road surface produced, accumulated snow make the sliding resistance of various bituminous pavements sharply descend, and usually cause defective steering stabilizer, out of control even rollover, be to cause the major cause that winter, traffic accident took place frequently, bring very big hidden danger and threat to traffic safety.Since large-scale snowfall, freezing disaster appear in the many provinces in south in 2008, researched and developed outstanding removing bituminous pavement thin ice technology and seemed particularly urgent.
Because before icy on road, frozen water has usually infiltrated through blacktop, in the hole of bituminous pavement structure, form " ice palpus ", tightly " peg " road surface, make that the stiction force of ice sheet and bituminous pavement is very big, even if make the spade shovel of digging with a pick, even tank rolls, and its deicing effect is still very undesirable.Therefore, seek initiatively, the bituminous pavement ice and snow removing technology of energy-conservation, efficient, environmental protection, guarantee the traffic safety in winter, become traffic in the winter subject matter that needs to be resolved hurrily
At present, snow-removing and ice-thawing method in countries in the world mainly adopts mechanical removal method and thawing method
1. mechanical deicing's snow dust: mainly adopt snow removing machineries such as snow throwing car, snow suction vehicle, snow pushing car and jet snow sweeper.Though snow removing efficient is higher, because the ice in the bituminous pavement structure is difficult to be eliminated, make road surface deicing efficient but very low, the pavement skid resistance difficulty or ease improve.Therefore, not only benefit is low, cost is high only to rely on mechanical deicing, and the infringement of road pavement is very big.After the annual extensive deicing action,, greatly reduce the work-ing life of bituminous pavement because the asphalt membrane on building stones surface by considerable damage, causes bituminous pavement hole groove, disease such as loose to occur on a large scale.
2. near salt compounds deicing method:,, make rainwater zero centigrade, should not freeze to reduce the apparent freezing point of rainwater mainly by salting.This method have material source extensively, characteristics such as low price, change ice and snow be effective, thereby obtained widespread usage., a large amount of saltings, not only heavy corrosion vehicle, the iron structure that destroys a bridge also cause secular destruction to ecotopes such as urban soil, vegetation.For example, salt causes that the plant yellowing is withered, soil constituent salinization, the decline of underground utilities burn into pavement life, the corrosion of bridge floor steel fiber etc.2010, provinces such as Henan prohibited and have used the salt Snow Agent.
In recent years Chang Yong environment-friendly type snow-melting agent, cardinal principle are still and add a small amount of sanitas in villaumites.Japan preceding field Co., Ltd. has developed the Mafilon snow-clearing technique, this technology will be by containing muriate isoreactivity composition (sodium-chlor, calcium chloride etc.) material add in asphalt, form salt slow-releasing bituminous pavement, can reduce by 3～5 ℃ of freezing points, thereby make the road surface have reduction effect icy on road about 2 years.Though this technology snow melt validity is long,, its essence remains the release salt, and the damage effect of traffic facilities and ecotope is still existed, and does not meet modern environment protection requirement.
For this reason, in recent years, some deicing technology based on physical principle have obtained development faster, and have been applied to some special road surfaces.Wherein, " heating and melting technology " and " stress deicing technology " is comparatively typical.
1. heating and melting method, mainly be to utilize all kinds of thermals source, carry out snow melt as electric energy, Sweet natural gas, steam, underground heat etc., ice-melt snow speed is fast, safety and environmental protection, still, energy consumption is big usually, expense is high, complex process, road pavement material, structure and difficulty of construction all have special or very high requirement, and also there is certain restriction in suitable highway section; In addition, the later period maintenance maintenance often needs excavated pavement, and its cost is higher, thereby use range is very restricted.Wherein, using conducting concrete technology (patent No. ZL02139160.2) mainly is by add the conduction discrete state material of suitable kind, content in bituminous concrete, as graphite, carbon black, carbon fiber etc., the electrical conductor that bituminous concrete is become have certain resistance.When there is the accumulated snow accumulated ice in the road surface, by the alternating-current heating, pavement temperature is raise, and then melting road surface ice and snow, ensure The coast is clear and traffic safety.From the low-carbon energy-saving angle, obviously, the valuable electric power that this Technology Need consumption is a large amount of, simultaneously because inorganic materials is poor with the bituminous consistency, the very high requirement of performance proposition of also can road pavement mating formation.As adopt the wire netting electric-heating technology, and crack infiltration phenomenon also can cause heating wire netting gets rusty, ruptures, and the maintenance in later stage also can be very high.
2. the stress deicing method is meant at the road surfacing resilient material.Because the elasticity of resilient material, when wheel rolled, the road surface had slight deformation, and this microdeformation has destroyed the ice and snow one-piece construction, ice sheet is produced break, and was easy to be eliminated.Usually, resilient material often adopts rubber, waste tyre rubber powder particle, mephenesin Carbamate resin etc.Add the method for resilient material, admixture resilient material in pitch is arranged, also have on new petrolize road surface to sprinkle resilient material, and be pressed into supercrust, or insert in the space of drainage road.The patented technology of Harbin Institute of Technology (application number 200710144972.8) proposes, when temperature-2 ℃, ice layer thickness 2mm, and effectively deicing of stress technique; But when low temperature below-12 ℃, accumulated snow thickness is when 10mm, and this technology then will diminish to the destructive force of ice sheet.
Summary of the invention
Main purpose of the present invention is to overcome the defective of above-mentioned prior art deicing on bituminous pavement, proposed a kind of by reducing the interface de-icing method of ice sheet and road surface cohesive force, that is: by apply the silicone rubber coating of a layered low-surface energy at bituminous pavement, to reduce the surface energy of bituminous pavement, thereby significantly reduce the cohesiveness of ice sheet road pavement, make that traditional mechanical deicing technology is able to efficiently, environmental protection, nondestructively remove the bituminous pavement cryosphere.
Summary of the invention
Influence the adhering principal element in ice sheet and road surface pavement temperature and ground surface material character, the particularly surface energy of ground surface material character are arranged.On the surface of low-surface-energy material, water reduces the wetting property to material surface, and ice crystal presents hydrophobic state, can greatly reduce the adhesivity of ice crystal to material surface, thereby the road surface accumulated ice is eliminated easily.Therefore, the gordian technique of road surface deicing just must reduce the wetting property of water road pavement, makes the road surface have hydrophobic nature or hydrophobicity, thereby reduces the adhesivity of ice sheet road pavement
Based on the superior low surface energy (24 * 10 of organo-silicone rubber molecule
-3N/m) and low glass transition temp point (105 ℃) characteristic, the present invention proposes a kind of bicomponent environment-friendly type organosilicon rubber emulsion hydrophobic coating.This coating sprayed or round brush behind bituminous pavement, but rapid permeability forms hydrophobic film to bituminous pavement slit and surface of aggregate inside, this film can significantly reduce the adhesivity of ice crystal road pavement.When ice sheet is subjected to the vibrations of vehicle tyre or rolls, the energy or the stress that are applied to ice sheet can't be delivered on the road surface again, and these energy will be absorbed by ice sheet, and then make ice sheet form reflection shape or netted cracked.Therefore, by this technology, can make the road surface ice sheet easier by the thoroughly removing of mechanical forces such as tire institute.
Realize that technical scheme of the present invention is: the main component of this coating is the A component that 40～57% organosilicon rubber emulsion, 5～30 portions of strengthening agents, 8～15 parts of fillers, 0.5～3 part of catalyzer, 1～2 part of membrane-forming agent, 5～10 parts of softening agent and 0.001～0.15 part of defoamer etc. constitute by 100 parts of solid contents; B component with formations such as 0.3～4 part of polyfunctional group organosilicon cross-linking agent and 0.2～3 part of silane coupling agent and 0.001～0.15 part of defoamers; Dispersion medium is 150～250 parts of alkaline distilled water or deionized water.
The agent of described component A MR medium reinforcing is that solid content is a kind of in 25% alkaline silica sol, the gas-phase silica; Described filler is one or more the mixture in lime carbonate, barium sulfate, the diatomite; Described catalyzer is a dibutyl tin laurate; Defoamer is 201 methyl-silicone oil emulsions; Membrane-forming agent is an ethyl acetate; Softening agent is an emulsified bitumen; Dispersion medium is distilled water or deionized water, and regulating pH value with ammoniacal liquor is 8.5～9.
Linking agent in the described B component is a kind of in tetraethoxysilane, methyl triacetoxysilane, vinyltriacetoxy silane, the methyl tributanoximo silane; Silane coupling agent is a kind of in γ-An Bingjisanyiyangjiguiwan, the γ-glycidyl ether oxygen base propyl trimethoxy silicane anilinomethyl triethoxysilane; Defoamer is 201 methyl-silicone oil emulsions.
Better for the deicing and the mechanical property that make the hydrophobic coating coating, by weight, B component/component A is 3～6/100.
Double component room temperature vulcanization silicon rubber road paint of the present invention, its preparation realizes as follows:
1. by weight, 150～250 parts of alkaline waters are dropped in the high speed dispersion jar, strengthen stirring velocity, by elder generation's heavy order in light back, comply with 5～30 portions of strengthening agents, 8～15 parts of fillers join in the multifunctional mixer, rotating speed with 800-1200rpm stirs 20min, after dispersing and mixing is even, add 100 parts of solid contents and be 40～57% organosilicon rubber emulsion, 1～2 part of membrane-forming agent, 0.5～3 parts of dibutyl tin laurates, 5～10 parts of emulsified bitumens and 0.001～0.15 part of defoamer, rotating speed with 300-500rpm stirs 20min, makes the A component after mixing.
2.0.3～4 parts of silicone rubber kinds linking agents, 0.2～3 part of silane coupling agent and 0.001～0.15 part of defoamer disappear to mix to stir and make the B component.
3. when using, by weight, be that 100/3～6 ratio joins B component in the A component that stirs at a slow speed lentamente with component A/ B component, the rotating speed with 300-500rpm stirs 20min then, makes after mixing to reduce ice sheet and the adhering hydrophobic coating of bituminous pavement.
The present invention compared with prior art has following beneficial effect:
1. double component room temperature vulcanization silicon rubber road paint of the present invention has good adsorption and perviousness to bituminous concrete pavement, and elasticity and wear-proof sliding-proof, stretch-proof performance are good.
2. double component room temperature vulcanization silicon rubber road paint of the present invention has good pavement construction.Envrionment temperature during construction if greater than 4 ℃, relative humidity less than 75%, wind speed is less than 6 grades, the freezing generation of no sleet gets final product in 24 hours.
3. double component room temperature vulcanization silicon rubber road paint of the present invention has that excellent ice and snow easily removes property, good migration of hydrophobicity and hydrophobic is restorative.
4. double component room temperature vulcanization silicon rubber road paint of the present invention is a water-borne coatings, has environment friendly.
Embodiment
Below by specific examples the present invention is described.
Embodiment 1
By weight, just 150 parts of alkaline waters drop in the high speed dispersion jar, strengthen stirring velocity, by elder generation's heavy order in light back, comply with 5 parts of hydrophobic meteorological silicon-dioxide, 10 parts of hydrophobic barium sulfate join in the multifunctional mixer, rotating speed with 800-1200rpm stirs 20min, after dispersing and mixing is even, add 100 parts of solid contents and be 57% organosilicon rubber emulsion, 5 parts of ethyl acetate, 2 parts of dibutyl tin laurates, 2 parts of dimethyl sulfoxide (DMSO), 5 parts of emulsified bitumens and 0.15 part of 201 methyl-silicone oil emulsion, rotating speed with 300-500rpm stirs 20min, makes the A component after mixing.4 parts of methyl triacetoxysilanes, 0.8 part of anilinomethyl triethoxysilane and 0.15 part of 201 methyl-silicone oil emulsion are mixed stirring make the B component.During use, by weight, be that 100/6 ratio joins B component in the A component that stirs at a slow speed lentamente with component A/ B component, rotating speed with 300-500rpm stirs 20min then, makes after mixing to reduce ice and snow and road surface cohesive force and make the double component room temperature vulcanization silicon rubber road paint that ice and snow is easy to root out.
On new and old petrolize road surface, thoroughly cleaning is clean before spraying for bituminous pavement, to rut, hole groove, handle in the crack or mend by replacing a damaged part.Require road surfaces thorough drying, cleaning, smooth.Use the emulsified bitumen spraying vehicle when the full width of cloth sprays, the lap width of spraying face is 1/2-1/3.If spraying twice o'clock, for the first time along the direction of traffic spraying, spraying is for the second time carried out against direction of traffic.Once spraying consumption is 0.3kg/m
2Twice spraying pitch time can not be oversize, approximately 3-4h.Behind the first pass coating curing, when spraying second time again, the film after the curing has begun hydrophobic, just can't spray up for second time.Get final product open to traffic behind curing of coating 6～8h.In order to improve the adhesion strength that is connected on coating and road surface, guarantee the affinity on coating and road surface, old bituminous pavement need be with emulsified bitumen spraying vehicle spraying tack coat, and the sprinkling amount is 0.3kg/m
2
Embodiment 2
By weight, the silicon rubber emulsion of 100 parts of solid contents 57%, 30 parts of alkaline silica sols (solid content 25%), 5 parts of ethyl acetate, 0.015 part of 201 methyl-silicone oil emulsion, 2 parts of dibutyl tin laurates, 5 parts of emulsified bitumens and 2g dimethyl sulfoxide (DMSO) are joined in the 250g alkaline aqueous solution (PH:8.5-9), rotating speed with 300-500rpm stirs 20min, mixes the A component of back system.0.8 part of methyl triacetoxysilane, 5 parts of γ-An Bingjisanyiyangjiguiwans and 0.015 part of 201 methyl-silicone oil emulsion are mixed, during use, by weight, be that 100/6 ratio joins B component in the A component that stirs at a slow speed lentamente with component A/ B component, rotating speed with 300-500rpm stirs 20min then, makes after mixing to reduce ice and snow and road surface cohesive force and make the double component room temperature vulcanization silicon rubber road paint that ice and snow is easy to root out.
Embodiment 3
Test of bituminous pavement construction depth and surface friction coefficient test
Is overlying on the sliding resistance (construction depth, frictional coefficient) that road surfaces may road pavement owing to film and produces material impact, and pavement skid resistance is an important indicator of reaction road surface security that therefore, we test the sliding resistance of actual road surface coating.
Embodiment 1 and embodiment 2 construction depth detected results are listed in table 1 and table 2, and data show that the prototectonics effect of depth of coating road pavement is less, and the pavement structural depth that asphalt tack coat arranged is more smaller than the pavement structural depth of no asphalt tack coat.
Embodiment 1 and embodiment 2 frictional coefficient detected results are listed in table 3 and table 4, data show: the frictional coefficient of coating road pavement slightly descends, belong in the medium sliding resistance safety range, meet pavement antiskid paint industry standard regulation: be anti-skidding in when 55≤BPN＜70, belonging to.Wherein, the surface friction coefficient that uses emulsified bitumen to make the tack coat sample compares the smaller of no emulsification asphalt tack coat.
Table 1 embodiment 1 construction depth detected result
| Road surface types | Before the processing | After the processing |
| Dope layer | 0.56 | 0.53 |
| Asphalt tack coat+dope layer | 0.54 | 0.48 |
Table 2 embodiment 2 construction depth detected results
| Road surface types | Before the processing | After the processing |
| Dope layer | 0.57 | 0.54 |
| Asphalt tack coat+dope layer | 0.55 | 0.47 |
Table 3 embodiment 1 frictional coefficient detected result
| Road surface types | Measure 1 | Measure 2 | Measure 3 |
| Control group | ?87 | ?75 | ?84 |
| Asphalt tack coat+dope layer | ?65 | ?55 | ?68 |
| Dope layer | ?68 | ?59 | ?72 |
Table 4 embodiment 2 frictional coefficient detected results
| Road surface types | Measure 1 | Measure 2 | Measure 3 |
| Control group | ?65 | ?70 | ?69 |
| Asphalt tack coat+dope layer | ?55 | ?58 | ?54 |
| Dope layer | ?58 | ?59 | ?56 |
Claims (5)
1. one kind is reduced ice sheet and the adhering hydrophobic coating of bituminous pavement, it is characterized in that the component of this coating and weight part proportioning are:
Component A:
Solid content is 100 parts of 40～57% 107 organosilicon rubber emulsions
5～30 parts of strengthening agents
8～15 parts of fillers
0.001～0.15 part of defoamer
1～2 part of membrane-forming agent
5～10 parts in softening agent
1～5 part of permeate agent
0.5～3 part of catalyzer
150～250 parts in dispersion medium
B component:
0.3～4 part of silicone rubber kinds linking agent
0.2～3 part of silane coupling agent
0.001～0.15 part of defoamer
2. a kind of reduction ice sheet according to claim 1 and the adhering hydrophobic coating of bituminous pavement is characterized in that: 107 organosilicon rubber emulsion solid contents are 40～57% among the described component A, and viscosity (25 ℃) is 7000～120000mPas; Described strengthening agent is that gas-phase silica or solid content are 20～30% alkaline silica sol; Described filler is one or more the mixture in lime carbonate, barium sulfate, the diatomite; Described catalyzer is a dibutyl tin laurate; Described defoamer is 201 methyl-silicone oil emulsions; Described membrane-forming agent is an ethyl acetate; Described softening agent is a kind of in common matrix pitch and the emulsified bitumen; Described permeate agent is a dimethyl sulfoxide (DMSO); Described thinner is the alkaline deionized water or the alkaline distilled water of ammoniacal liquor preparation, and pH value is 8.5～9.
3. a kind of reduction ice sheet according to claim 1 and the adhering hydrophobic coating of bituminous pavement is characterized in that: the silicone rubber crosslinking agent in the described B component is a kind of in tetraethoxysilane, methyl triacetoxysilane, vinyltriacetoxy silane, the methyl tributanoximo silane; Described silane coupling agent is a kind of in γ-An Bingjisanyiyangjiguiwan, the γ-glycidyl ether oxygen base propyl trimethoxy silicane anilinomethyl triethoxysilane; Described defoamer is 201 methyl-silicone oil emulsions.
4. a kind of reduction ice sheet according to claim 1 and the adhering hydrophobic coating of bituminous pavement is characterized in that by weight B component/component A is 3～6/100.
5. a kind of reduction ice sheet according to claim 1 and the adhering hydrophobic coating of bituminous pavement is characterized in that comprising the steps:
A. by weight, 150～250 parts of alkaline waters are dropped in the high speed dispersion jar, add 5～30 portions of strengthening agents, 8～15 parts of fillers successively, and progressively increase stirring velocity, finally the rotating speed with 800-1200rpm stirs 20min.Behind the homodisperse, adding 100 parts of solid contents is 40～57% organosilicon rubber emulsion, 1～2 part of membrane-forming agent, 0.5～3 part of dibutyl tin laurate, 5～10 parts of emulsified bitumens and 0.001～0.15 part of defoamer, stir 20min with the rotating speed of 300-500rpm, to be mixedly make the A component after evenly.
B.0.3～4 part silicone rubber kinds linking agent, 0.2～3 part of silane coupling agent and 0.001～0.15 part of defoamer mixing are stirred and are made the B component.
When c. using, by weight, in B component/component A is 3～6/100 ratios, B component is joined in the A component that stirs at a slow speed lentamente, stir 20min with rotating speed 300-500rpm then, to be mixedly make a kind of ice sheet and adhering aqueous organosilicon rubber coating of bituminous pavement of reducing after evenly.
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| CN2011100299081A CN102127365A (en) | 2011-01-26 | 2011-01-26 | Hydrophobic coating capable of lowering adhesion of ice layers for asphalt pavements |
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| CN2011100299081A CN102127365A (en) | 2011-01-26 | 2011-01-26 | Hydrophobic coating capable of lowering adhesion of ice layers for asphalt pavements |
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Application publication date: 20110720 |