CN101265045A - Covering material for treating asphalt macadam seal coat stone material and method for treating stone material - Google Patents
Covering material for treating asphalt macadam seal coat stone material and method for treating stone material Download PDFInfo
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- CN101265045A CN101265045A CNA2008100181073A CN200810018107A CN101265045A CN 101265045 A CN101265045 A CN 101265045A CN A2008100181073 A CNA2008100181073 A CN A2008100181073A CN 200810018107 A CN200810018107 A CN 200810018107A CN 101265045 A CN101265045 A CN 101265045A
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Abstract
The invention belongs to the field of asphalt pavement and relates to a coating material for treating stone materials as asphalt macadam seal coat and a method for treating stone materials. The inventive coating material comprises 27-52 wt% of petroleum asphalt, 0.6-4 wt% of cationic asphalt emulsifier, 1-5 wt% of tackifier, 0-8 wt% of diluting agent and water. The production method thereof comprises: the petroleum asphalt is diluted with the diluting agent and then heated or is directly heated, and is emulsified to obtain a concentrated asphalt emulsion; and the concentrated asphalt emulsion is mixed with an aqueous solution of the tackifier, to obtain the coating material. The method for treating stone materials as asphalt macadam seal coat comprises: the stone materials are sorted, washed and sieved, and then the coating material is sprayed onto the surface of the stone materials at room temperature. After the stone materials are treated with the coating material, the bonding performance of the stone material to the asphalt binder is improved, thereby avoiding the looseness and stripping of stone materials in the road surface and improving the driving safety.
Description
Technical field
The invention belongs to bituminous pavement engineering field, particularly a kind of method that wraps material and processing building stones of handling the bitumen macadam seal coat building stones.
Background technology
The bitumen macadam seal coat technology is a certain amount of rubble of spreading immediately behind a kind of sprinkling pitch class agglutinate, rubble 2/3 is embedded in the agglutinate and forms thin seal technology durable, antiskid through rolling.The crushed stone sealing technology has remarkable antiskid, water shutoff performance, good retinue's deformability because of it and advantage such as cost is low, construction technology is easy, speed of application is fast, has been widely used in wearing course, the surface layer of newly-built road and has built the preventive maintenance of road.
Building stones are pressed SiO usually
2Content is greater than 65%, 65%～52% and be divided into acidity, neutrality and alkaline less than 52%.It is generally acknowledged alkalescence gather materials good with the bituminous adhesivity, acidity aggregate (as grouan, sandstone and quartzite) and bituminous poor adhesion, but its compact structure, hard, wear resistance good, effect is squeezed in the embedding that can give full play between gathering materials, roll in the process non-friable, so crushed stone sealing with the building stones multiselects with acidity aggregates such as grouan, sandstone and quartzites.In the crushed stone sealing technology, because acid stone and bituminous adhesivity are relatively poor, after open to traffic was driven a vehicle, building stones were very easily loose, peel off, and particularly on motorway, the speed of a motor vehicle is very fast, causes to fly to expect phenomenon, and road pavement and traffic safety all can threaten.How increasing acid stone and bituminous adhesivity and antistrip performance is the key of crushed stone sealing technology.
The admixture antistripping agent is to improve crushed stone sealing technology medium pitch and building stones adhesion property method comparatively commonly used in pitch at present, but this method cost height, need in asphalt tank, to increase agitating procedure, technology is complicated, and most of antistripping agent poor high temperature stability, easily decompose, the life-time service effect is undesirable.Improving pitch and the adhering another kind of method of building stones is that lime powder or cement are added in the asphalt, or with the surface that liming is handled acid stone, increases building stones and bituminous adhesivity.Although this method can suitably improve building stones and bituminous adhesivity, because of temperature in the construction is lower, liming or lime powder or cement etc. all do not produce chemical reaction with pitch basically, and the adhesivity of pitch and building stones still can not satisfy service requirements.Chinese patent CN1239625C discloses a kind of method and equipment thereof of bitumen coating particulate material, mainly be to adopt foam asphalt that particulate material is applied, need in the coating process particulate material is heated, and need the qualified foam asphalt of preparation, although can reach the purpose that particulate material is wrapped, energy consumption is higher, technology is complicated.Chinese patent CN101031523A discloses and a kind ofly has been used for that hot-mixed asphaltic concrete is used and the pretreated of other related application gathered materials, it is add the end binder of asphaltic base in gathering materials before, base paint is joined surface temperature to be at least on 250 heat gathers materials, base paint heat gather materials and end binder between form the base paint middle layer, can improve the performance of bituminous concrete, but in the heat-processed of gathering materials, consumed lot of energy, increased the cost of this technology.
Summary of the invention
Problem to be solved by this invention is to overcome the shortcoming that exists in the existing building stones preconditioning technique, and the method that wraps material and processing building stones of the good processing bitumen macadam seal coat building stones of a kind of easy to use, with low cost, building stones and bituminous binder adhesion property is provided.
The material that wraps of processing bitumen macadam seal coat building stones provided by the present invention is made up of the component of following weight ratio: petroleum pitch 27～52%, and cationic pitch emulsifying agent 0.6～4%, tackifier 1～5%, thinner 0～8%, surplus is a water.
Processing bitumen macadam seal coat building stones provided by the invention to wrap material preparation method as follows:
1) preparation enriching brea emulsion, wherein the weight percentage of each component is: petroleum pitch 45～65%, cationic pitch emulsifying agent 1～5%, thinner 0～10%, all the other are water;
The preparation process of enriching brea emulsion is: thinner is joined in the petroleum pitch, mix, be heated to 100～130 ℃ stand-by, or directly pitch is heated to 100～130 ℃ stand-by; With the emulsifying agent stirring that is added to the water, form emulsifier aqueous solution; With petroleum pitch after the above-mentioned heating and mixing diluents liquid or directly the pitch after the above-mentioned heating is joined emulsifier aqueous solution,, obtain the enriching brea emulsion then through emulsification, shearing;
2) tackifier are added in the above-mentioned enriching brea emulsion, promptly get the material that wraps of processing bitumen macadam seal coat building stones of the present invention after stirring, wherein the enriching brea emulsion accounts for 60～80%, and tackifier account for 1～5%, and all the other are water, and above ratio is weight percentage.
Above-mentioned cationic pitch can adopt positively charged ion to split soon to split in type emulsifying agent or the positively charged ion a kind of in the type emulsifying agent with emulsifying agent;
Above-mentioned positively charged ion splits the optional alkyl diamine class of type emulsifying agent soon, preferably adopts tallow base Pn or hydrogenated-tallow group Pn.
Split the optional quaternary ammonium salts of type emulsifying agent in the above-mentioned positively charged ion, preferably adopt in cetyl trimethylammonium bromide, octadecyl trimethylammonium bromide, octadecyl trimethyl benzyl ammonia chloride, the octadecyl tri-methyl benzyl ammonium bromide one or more.
Above-mentioned tackifier are a kind of in styrene-butadiene latex (SBR), natural rubber breast (NR), polychloroprene latex (CR), nitrile rubber (ABR), liquid styrene-butadiene-styrene (SBS) or the liquid ethylene-vinyl acetate copolymer (EVA).
Asphalt flux is selected the mixture of kerosene, diesel oil or kerosene and diesel oil usually for use.
The method of processing bitumen macadam seal coat building stones provided by the present invention is:
1) building stones is screened or clean, its objective is the content that reduces pin, sheet building stones, make the building stones shape of selecting be block, and meet among the industry standard JTG F40-2004 of the People's Republic of China (PRC), satisfy the requirement of bitumen macadam seal coat technology the regulation of coarse aggregate grain size specification;
2) wrap building stones: at normal temperatures with 27～52% petroleum pitch, 0.6～4% cationic pitch emulsifying agent, 1～5% tackifier, 0～8% thinner, surplus is that the material that wraps that water is formed is sprayed onto the building stones surface, the building stones surface is formed wrap layer, promptly obtains the building stones that wrap that are used for bitumen macadam seal coat of the present invention, wrap the rate of wrapping that material is sprayed onto behind the building stones surface and be at least 50%, more than each components contents ratio be weight percentage.
For being formed, the building stones surface wraps layer more uniformly, can reach the required rate that wraps again, the method that preferably adopts gradation to spray will wrap material and be sprayed onto the building stones surface, sprinkling is to carry out when building stones roll, wrap the rate of wrapping that material is sprayed onto behind the building stones surface and be at least 2/3rds, spraying twice generally speaking can meet the demands.
In order further to reduce cost, the part by weight that wraps material and building stones generally is controlled at 0.2～0.8: 100, so that form the thin layer that wraps.
Of the present inventionly wrap the base number that material can improve the building stones surface, and has an excellent permeability energy, may penetrate in the building stones surface pore, emulsifying agent wherein is a tensio-active agent, can effectively reduce interfacial tension, these factors have all increased building stones and bituminous adhesion property, have improved the water stability of bituminous pavement, prevent damage by water evil destruction, strengthened the endurance quality and the work-ing life on road surface.In addition, wrap material and be sprayed onto that some forms projection behind the building stones surface, increased the roughness on building stones surfaces, help bituminous material the wetting of building stones surface with sprawl; The material that wraps of the present invention is a black, with the road surface solid colour, has avoided building stones in the crushed stone sealing technology to be exposed to the grey material phenomenon of road surface part, has increased the road surface aesthetic property.In addition, the present invention wraps material and building stones and is the normal temperature state in the building stones of bitumen macadam seal coat are handled, need not heat, not only saved a large amount of energy, and reduced the environmental pollution that brings owing to heating, the present invention also has advantage easy to use, lower-cost.The present invention is particularly suitable for wrapping acid stone, also can make itself and bituminous adhesivity obtain certain raising if wrap alkaline building stones.
Embodiment
Below in conjunction with specific embodiment content of the present invention is described in detail.
Embodiment 1
1) screening building stones: with pending building stones,, reduce the content of faller gill shape building stones, make the shape of building stones be block, to satisfy the requirement of bitumen macadam seal coat technology by the building stones trimmer.
2) clean building stones: the building stones water after the shaping is cleaned, remove the building stones surface and drift along, then oven dry or natural air drying.
3) screening building stones: according among the industry standard JTG F40-2004 of the People's Republic of China (PRC) " asphalt highway construction technique normalizing " to the regulation of coarse aggregate grain size specification, take into account the characteristics and the demand of bitumen macadam seal coat technology, to clean the exsiccant building stones by multistage sieve, being divided into particle diameter is 4 grades of simple grain footpath building stones of 3～5mm, 5～10mm, 10～15mm and 10～20mm, be that the building stones specification is respectively S14, S12, S10 and S9, to satisfy the diversified demand of bitumen macadam seal coat technology.It is the building stones of S14 that this example is selected specification for use.
4) preparation wraps material, and wrapping material with preparation 100kg is example.
The first step: prepare spissated bitumen emulsion
4kg kerosene thinner is joined in No. 90 pitches in 40kg Kelamayi, mixture heating up to 110～130 of pitch and kerosene are ℃ stand-by.Again 2.3kg cetyl trimethylammonium bromide emulsifying agent is joined in 50～60 ℃ the 23.7kg water and stir, cetyl trimethylammonium bromide is dissolved in the water.Earlier the cetyl trimethylammonium bromide aqueous solution is joined in the shears, then pitch and kerosene mixed solution are slowly joined in the emulsifier aqueous solution, emulsification 5 minutes promptly obtains the enriching brea emulsion.
Second step: 3kg styrene-butadiene latex tackifier are joined in the 27kg normal temperature tap water, stir, styrene-butadiene latex is dispersed in the water, again the styrene-butadiene latex aqueous solution is joined in the enriching brea emulsion, artificial or mechanical stirring 5 minutes, the building stones that promptly get bitumen macadam seal coat of the present invention wrap material.
5) sprinkling wraps material
Spray and carry out at twice at normal temperatures: building stones are put into spiral conveyer trough, first sprinkler head is positioned at the front end position of spiral conveyer trough, second sprinkler head and first sprinkler head are at a distance of certain distance, building stones roll in helical stir, advance, the weight ratio that wraps material and building stones is 0.5: 100, after twice sprinkling, stirring, the building stones surface has formed the uniform ultra-thin layer that wraps.
Embodiment 2
27kg Korea S SK90 pitch is heated to 100～120 ℃, again 0.6kg tallow base Pn emulsifying agent is joined in 60～70 ℃ the 32.4kg water stir, dissolving; The tallow base Pn aqueous solution is joined in the colloidal mill, then 100～120 ℃ pitch is slowly joined in the tallow base Pn aqueous solution, emulsification 3 minutes obtains the enriching brea emulsion; 1kg natural rubber breast tackifier are joined in the 39kg normal temperature tap water, stir, natural rubber whey solution is joined in the enriching brea emulsion again, artificial or mechanical stirring 3 minutes promptly obtains 100kg and wraps material.
To specification is that the building stones of S 12 spray and to wrap material, and its process is identical with embodiment 1, and the weight ratio that wherein wraps material and building stones is 0.8: 100.
Embodiment 3
100Kg wraps material and is formed by the method configuration by embodiment 1 of 8kg kerosene, No. 70 pitches in the joyful mountain range of 52kg, 4kg octadecyl trimethyl benzyl ammonia chloride emulsifying agent, 5kg liquid styrene-butadiene-styrene tackifier and water, and the Heating temperature of its medium pitch and kerosene mixture is 110～120 ℃.The weight ratio that wraps material and specification and be the S10 building stones is 0.2: 100, and the sprinkling process is identical with embodiment 1.
Embodiment 4
100Kg wraps material and is formed by the method configuration by embodiment 1 of 5kg kerosene, No. 110 pitches in 35kg Kelamayi, 2kg octadecyl trimethylammonium bromide emulsifying agent, 3kg liquid ethylene-vinyl acetate copolymer tackifier and water, and the Heating temperature of its medium pitch and kerosene mixture is 100～120 ℃.The weight ratio that wraps material and specification and be the S9 building stones is 0.4: 100, and the sprinkling process is identical with embodiment 1.
Embodiment 5
The emulsifying agent that wraps in the material adopts the octadecyl tri-methyl benzyl ammonium bromide, and tackifier adopt polychloroprene latex, and other component is identical with embodiment 2, and the proportional quantity of each component is also identical with embodiment 2.The weight ratio that wraps material and specification and be the S12 building stones is 0.7: 100, and the sprinkling process is identical with embodiment 1.
Embodiment 6
The building stones pretreatment process of bitumen macadam seal coat is identical with method among the embodiment 2.Usedly in the building stones pretreatment process of bitumen macadam seal coat wrap material prescription and the preparation method is substantially the same manner as Example 2, different is that emulsifying agent adopts hydrogenated-tallow group Pn and octadecyl trimethylammonium bromide, ratio is 3: 1, and tackifier adopt nitrile rubber.
Embodiment 7
The emulsifying agent that wraps in the material adopts octadecyl Pn and cetyl trimethylammonium bromide, and both weight ratios are 5: 1, and tackifier adopt nitrile rubber, and other component is identical with embodiment 2, and the proportional quantity of each component is also identical with embodiment 2.Wrapping material and the weight of building stones, when to spray process identical with embodiment 3.
Embodiment 8
Wrapping the preparation of material and building stones, to wrap process substantially the same manner as Example 1, and different is that thinner adopts diesel oil.
Embodiment 9
Wrapping the preparation of material and building stones, to wrap process substantially the same manner as Example 1, and different is the composition that thinner adopts diesel oil and diesel oil, and ratio is 3: 1.
Embodiment 1～9 prepared building stones are carried out the adhesivity simultaneous test with the building stones that nothing wraps layer, and test medium pitch floor is No. 90 pitches in Kelamayi.According to the relevant adhesiveness test regulation of the T0616-1993 among the ministerial standard JTJ052-2000 of the Ministry of Communications " highway engineering pitch and asphalt testing regulation ", detect, test-results is as shown in the table.
| Test-results | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 | Embodiment 9 |
| The rate that wraps of building stones, % | 100 | 85 | 70 | 55 | 100 | 100 | 95 | 90 | 95 |
| Do not have and wrap a layer building stones adhesivity grade | 2 | 2 | 2 | 2 | 2 | 3 | 2 | 2 | 2 |
| Wrap building stones adhesivity grade | 5 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 |
Test-results shows, wraps with provided by the invention that building stones and bituminous adhesion property are significantly improved behind the material processing building stones.
According to thinking of the present invention, when the material that wraps that requires when not too high also fluxed asphalt (eu-bitumen) or emulsified bitumen (comprising modifying asphalt) to be used as building stones.
Claims (10)
1, a kind of material that wraps of handling the bitumen macadam seal coat building stones is characterized in that being made up of the component of following weight ratio: petroleum pitch 27～52%, and cationic pitch emulsifying agent 0.6～4%, tackifier 1～5%, thinner 0～8%, surplus is a water.
2, the material that wraps according to claim 1 is characterized in that said cationic pitch emulsifying agent is that positively charged ion splits soon and splits the type emulsifying agent in type emulsifying agent or the positively charged ion.
3, the material that wraps according to claim 2 is characterized in that it is alkyl diamine that positively charged ion splits the type emulsifying agent soon, and splitting the type emulsifying agent in the positively charged ion is quaternary amine.
4, the material that wraps according to claim 3, the said alkyl diamine emulsifying agent of its feature is tallow base Pn or hydrogenated-tallow group Pn, and the quaternary amine emulsifying agent is one or more in cetyl trimethylammonium bromide, octadecyl trimethylammonium bromide, octadecyl trimethyl benzyl ammonia chloride, the octadecyl tri-methyl benzyl ammonium bromide.
5, according to each described material that wraps in the claim 1 to 4, the said tackifier of its feature are a kind of in styrene-butadiene latex, natural rubber breast, polychloroprene latex, nitrile rubber, liquid styrene-butadiene-styrene or the liquid ethylene-vinyl acetate copolymer.
6, prepare the described method that wraps material of claim 1, it is characterized in that carrying out as follows:
1) preparation enriching brea emulsion, wherein the weight percentage of each component is: petroleum pitch 45～65%, cationic pitch emulsifying agent 1～5%, thinner 0～10%, all the other are water; Preparation process is: thinner is joined in the petroleum pitch, mix, be heated to 100～130 ℃ stand-by, or directly pitch is heated to 100～130 ℃ stand-by; With the emulsifying agent stirring that is added to the water, form emulsifier aqueous solution; With petroleum pitch after the above-mentioned heating and mixing diluents liquid or directly the pitch after the above-mentioned heating is joined emulsifier aqueous solution,, promptly obtain the enriching brea emulsion then through emulsification, shearing;
2) tackifier are added in the above-mentioned enriching brea emulsion, promptly get the material that wraps of processing bitumen macadam seal coat building stones of the present invention after stirring, wherein the enriching brea emulsion accounts for 60～80%, and tackifier account for 1～5%, and all the other are water, and above ratio is weight percentage.
7, preparation according to claim 6 wraps the method for material, it is characterized in that said emulsifying agent is alkyl diamine and quaternary amine, said tackifier are a kind of in styrene-butadiene latex, natural rubber breast, polychloroprene latex, nitrile rubber, liquid styrene-butadiene-styrene or the liquid ethylene-vinyl acetate copolymer.
8, preparation according to claim 7 wraps the method for material, it is characterized in that said emulsifying agent is a kind of in tallow base Pn or the hydrogenated-tallow group Pn, or in the cetyl trimethylammonium bromide, octadecyl trimethylammonium bromide, octadecyl trimethyl benzyl ammonia chloride, octadecyl tri-methyl benzyl ammonium bromide one or more.
9, with the described method that wraps material processing bitumen macadam seal coat building stones of claim 1, step is as follows:
1) building stones is screened or clean;
2) wrap building stones: at normal temperatures with 27～52% petroleum pitch, 0.6～4% cationic pitch emulsifying agent, 1～5% tackifier, 0～8% thinner, surplus is that the material that wraps that water is formed is sprayed onto the building stones surface, the building stones surface is formed wrap layer, promptly obtains the building stones that wrap that are used for bitumen macadam seal coat of the present invention, wrap the rate of wrapping that material is sprayed onto behind the building stones surface and be at least 50%, more than each components contents ratio be weight percentage.
10, according to the described method that wraps material processing bitumen macadam seal coat building stones of claim 9, it is characterized in that the method that adopts gradation to spray will wrap material and be sprayed onto the building stones surface, sprinkling is to carry out when building stones roll, the weight ratio that wraps material and building stones is 0.2～0.8: 100, wraps the rate of wrapping that material is sprayed onto behind the building stones surface and is at least 2/3rds.
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| CN104086219A (en) * | 2014-06-26 | 2014-10-08 | 华南理工大学 | Stone surface performance improvement system and stone surface performance improvement method |
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| CN108103875A (en) * | 2017-12-13 | 2018-06-01 | 江苏中路工程技术研究院有限公司 | Antiskid crushed stone sealing road surface and its construction method |
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