CN102010603B - Rubber powder modified emulsified asphalt and preparation method thereof - Google Patents
Rubber powder modified emulsified asphalt and preparation method thereof Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention provides rubber powder modified emulsified asphalt. The rubber powder modified emulsified asphalt consists of emulsified asphalt, rubber powder and composite treatment fluid, and is characterized in that: the rubber powder modified emulsified asphalt contains macroscopic rubber powder particles, wherein the mass ratio of emulsified asphalt evaporation residues to the rubber powder is 5:2-10:1; and the mass ratio of the rubber powder to the composite treatment fluid is 1:1-2:1. A preparation method of the rubber powder modified emulsified asphalt comprises the following steps of: performing surface treatment on the rubber powder to substantially form dough-like fibers with rubber cores; and treating through the composite treatment fluid so as to make the dough-like fibers excellently compatible with the emulsified asphalt. Therefore, the rubber powder modified emulsified asphalt can be used at normal temperature, the evaporation residues of the rubber powder modified emulsified asphalt has the same performance as that of the rubber asphalt, and the rubber powder modified emulsified asphalt and the method has the advantages of simple and convenient process, low cost, energy conservation, emission reduction, environmental friendliness and resource recycling and the like.
Description
Technical field
The present invention relates to a kind of road-making material, a kind of rubber powder modified emulsified bitumen and preparation method thereof is provided especially.
Background technology
Rubber asphalt is with its good pavement performance; In bituminous pavement construction and maintenance project, be widely used, but rubber asphalt must carry out under hot conditions in making and use at present; It is bigger to have produced energy consumption thus; Performance is prone to decay, and construction is inconvenient, problems such as secondary environmental pollution.
Emulsified bitumen is with also widespread uses in bituminous pavement of characteristics such as its environmental protection, energy-conservation, easy constructions.But; Common emulsified asphalt exists the problem that aspects such as high-temperature stability, low-temperature cracking-resistance, anti-water damage property can not satisfy the road request for utilization fully; Especially in the volume of traffic bigger highway section or the bigger area of the temperature difference, be prone to cause that the road surface comes off, disease such as crack and hole groove.For reducing these diseases, at present in special area or the highway section all use emulsified modified asphalt, used material modified mostly of emulsified modified asphalt are SBS, SBR, still, the road that the low-temperature performance of these emulsified modified asphalts still can not satisfy low temp area fully is with requiring.In addition, these properties-correcting agent all exist cost an arm and a leg, the problem of manufacture craft more complicated.
Therefore, but people seeking always a kind of premium properties that can keep rubber asphalt have again advantage such as emulsified bitumen normal temperature use, non-environmental-pollution and cheap desirable road-making material.
Summary of the invention
The object of the present invention is to provide a kind of rubber powder modified emulsified bitumen and preparation method thereof; When having kept the rubber asphalt pavement performance; Solved the problem that rubber asphalt normal temperature can't be stored and use down; Overcome shortcomings such as the higher energy consumption of rubber asphalt, construction inconvenience, performance degradation, replenished the technological gap of rubber powder modified emulsified bitumen simultaneously.
We are through a large amount of discovering, the rubber grain in the rubber asphalt does not form reticulated structure, but relatively independent bulk structure.That is to say why rubber asphalt has good pavement performance mainly to be because rubber grain forms the bulk corpus fibrosum with rubbery core in pitch; The rubber particle surface fiber adsorbs a large amount of pitches; Form good the connection with pitch; When the condition of high temperature, it is mobile that the surface fiber of rubber grain has suppressed bituminous, makes rubber asphalt have higher high-temperature stability; When low-temperature condition, pitch is near vitreum, and the rubber grain of combining closely with it, rubbery core provide bigger deformability, make rubber asphalt have good low-temperature stability.Therefore, the performance quality of rubber asphalt depends on whether rubber grain has formed the bulk fiber with rubbery core in pitch.
Emulsified bitumen is that petroleum pitch and water are washed in backwash under the effects such as surfacant (emulsifying agent), stablizer, the bitumen emulsion that processes through emulsification.Wherein pitch particle is dispersed in the water medium, forms the grain pattern form of " water-in-oil " or " oil-in-water ", is emulsion state under the normal temperature condition.Will form oily water separation when this grain pattern breaks, after the loss of water, remainder is a residue after the evaporation of emulsified bitumen, has had original bituminous performance.Therefore, the performance of residue has determined the pavement performance of emulsified bitumen after the evaporation of emulsified bitumen.And, keep not breakdown of emulsion before use, can in specific time, breakdown of emulsion be the key of emulsified bitumen production technology after the use.
Rubber powder modified emulsified bitumen provided by the invention is exactly the intensity formation mechanism according to rubber asphalt and emulsified bitumen; At first rubber powder is carried out surface treatment; Make it basically form bulk fiber with rubbery core; Handle making itself and emulsified bitumen have good consistency again through Combined Processing liquid, make aspects such as its viscosity, stability, de-emulsification speed identical, behind the breakdown of emulsion with emulsified bitumen; Disperseed to have the bulk fiber of rubbery core in its evaporation back residue, made it have the performance identical with rubber asphalt.But use thereby reached rubber powder modified emulsified bitumen normal temperature, the performance of its evaporation back residue has the purpose with the identical performance of rubber asphalt.Since the rubber powder modified emulsified bitumen employed main material modified be waste-tyre rubber-powder, and can produce at normal temperatures and use.Therefore, reduced product cost, turned waste into wealth again, reduced pollution, reduced the energy, reduce the carbon emission amount, it has the superperformance of rubber asphalt again simultaneously, has satisfied the request for utilization of road.Therefore, good, the easy construction, cheap, energy-conservation, non-secondary pollution of rubber powder modified emulsified bitumen pavement performance.It is the road-making material of the excellent property of a kind of energy-conservation, reduction of discharging, environmental protection, resource circulation utilization.
Rubber powder modified emulsified bitumen provided by the invention; Form by emulsified bitumen, rubber powder and Combined Processing liquid; It is characterized in that: macroscopic rubber powder particle is arranged in the said rubber powder modified emulsified bitumen; Wherein, the mass ratio of Asphalt Emulsion Evaporation Residue and rubber powder is 5: 2～10: 1, and the mass ratio of rubber powder and Combined Processing liquid is 1: 1～2: 1
At normal temperatures, the En Gela viscosity of rubber powder modified emulsified bitumen is 2-30, and stable 5d attaches area greater than 2/3 with the adhesivity of gathering materials for wrapping up in less than 5%, de-emulsification speed for split soon, in a kind of in splitting or splitting slowly;
Behind the breakdown of emulsion, the correlation parameter of evaporation back residue is following: 5 ℃ of ductility＞10cm, softening temperature＞50 ℃, recovery of elasticity＞50%, 180 ℃ rotary viscosity＞0.5Pa.s;
Wherein, the emulsified bitumen that said emulsified bitumen should be satisfied " asphalt highway construction technique normalizing " requires, the penetration degree of its evaporation back residue in the time of 25 ℃ is 5mm～30mm; Ductility＞40cm in the time of 15 ℃; Solubleness is greater than 97.5%; Residual components content is greater than 50%.
Said Combined Processing liquid is that in SBS emulsion, SBR emulsion, shoddy emulsion, the soap lye one or more are composited;
Said rubber powder be particle less than 20 orders, and through surface treatment, its treatment process is that one or more method synthesis in desulfurization, activation, the silication are handled.Find rubber powder granule is crossed influences the rubber powder modified emulsified bitumen greater than meeting stability after deliberation, also can bring bad influence the result of use of rubber powder modified emulsified bitumen.Therefore, the maximum particle diameter of rubber powder granule should not be greater than 20 orders.Rubber powder should adopt waste tyre rubber powder, characteristics such as impurity is less because waste tyre rubber powder has, natural gum content is higher, steady quality, sufficient material source, and be used to rubber asphalt production.So, utilize waste tyre rubber powder as properties-correcting agent, can make the pavement performance of rubber powder modified emulsified bitumen and the pavement performance basically identical of rubber asphalt.Reduced rubber powder modified emulsified bitumen cost simultaneously.
Rubber powder modified Preparation of Emulsification Asphalt method provided by the invention is characterized in that: the concrete preparation process of rubber powder modified emulsified bitumen is following:
---bitumen production is become emulsified bitumen;
---rubber powder is carried out surface treatment, adopt one or more method synthesis in desulfurization, activation, the silicification method to handle, rubber powder is basically formed have the bulk fiber of rubbery core;
---preparation Combined Processing liquid, said Combined Processing liquid is composited by in SBS emulsion, SBR emulsion, shoddy emulsion, the soap lye one or more;
---with rubber powder after the surface treatment and Combined Processing liquid, be 1: 1～2: 1 mixed and stir, obtain the rubber powder after the Combined Processing, let rubber powder and emulsified bitumen have good consistency according to the respective quality ratio;
---with the rubber powder after the Combined Processing with stir after the emulsified bitumen that has been prepared into mixes or overground 1～3 time of high speed shear after, promptly obtain the rubber powder modified emulsified bitumen.
The storing temp of said rubber powder modified emulsified bitumen is not more than 50 ℃.
Rubber powder modified emulsified bitumen provided by the invention can be widely used in being mainly used in the normal temperature asphalt in road construction and the maintenance, semi-flexible pavement mixture, stress absorbing layer, bridge surface waterproof layer, crushed stone sealing, engineerings such as slurry seal, little table place.Have high-temperature stability preferably, low-temperature cracking-resistance has the ability that rises on can the delayed reflex crack; Can play waterproof, antiskid, suppress the effect of crackle.
Rubber powder modified emulsified bitumen provided by the invention and preparation method thereof, it is easy to have technology, and cheap, energy-conservation, reduction of discharging, environmental protection, resource can obtain advantages such as recycle.
Embodiment
Embodiment below in conjunction with concrete further specifies the present invention:
Embodiment 1
Get No. 90 pitch 1.5t in the Liaohe River, adopt cationic emulsifier, be emulsified into companion and type emulsified bitumen; Water intaking divides less than 5%, and metal content is less than 0.4%, and ash oontent is less than 8%; The order number is less than 20 order waste-tyre rubber-powder 0.3t, adds the acvator of rubber powder quality 0.3% again, in mixing tank; Stirring at low speed (300～1000 rev/mins) 5 minutes; Be warming up to 150 ℃, hold warm 60min, process the surface active rubber powder; The cooling back adds 50% Combined Processing liquid of rubber powder quality, and Combined Processing liquid is by 2 mass parts SBR emulsions and 5 mass parts soap lye solution compositions, and stirring at low speed (300～1000 rev/mins) is 5 minutes again; Rubber powder after the Combined Processing is added in the emulsified bitumen, use high-speed shearing machine more overground 1 time, make rubber powder modified asphalt, its performance index are:
De-emulsification speed: in split;
En Gela viscosity 25:
5d is less than 5% for stability,
Attaches area greater than 2/3 with the adhesivity of gathering materials for wrapping up in;
(evaporation back residue) performance is behind the breakdown of emulsion:
Penetration degree: 86 (0.1mm)
5 ℃ of ductility: 14cm,
Softening temperature: 56 ℃,
Recovery of elasticity: 66%,
180 ℃ of rotary viscosity: 1.5Pa.s.
Embodiment 2
Get No. 90 pitch 1.5t in the Liaohe River, adopt cationic emulsifier, be emulsified into companion and type emulsified bitumen; Water intaking divides less than 5%, and metal content is less than 0.4%, and ash oontent is less than 8%; The order number is less than 20 order waste-tyre rubber-powder 0.15t, adds that to account for the rubber powder massfraction be 1.2% coupling agent, adds the acvator of rubber powder quality 0.3% again; In mixing tank, stirring at low speed (300～1000 rev/mins) 5 minutes is warming up to 150 ℃; Hold warm 60min; Cooling back adds and rubber powder Combined Processing liquid identical in quality, and wherein Combined Processing liquid is made up of 2 mass parts SBS emulsions and 2 mass parts shoddy solution and 6 mass parts soap lyes, and stirring at low speed (300～1000 rev/mins) is 5 minutes again; Rubber powder after the Combined Processing is added in the emulsified bitumen, use high-speed shearing machine more overground 2 times, make rubber powder modified asphalt, its performance index are:
En Gela viscosity is 30,
5d is less than 5% for stability,
Attach area greater than 2/3 with the adhesivity of gathering materials for wrapping up in,
De-emulsification speed is for split slowly;
(evaporation back residue) performance index do behind the breakdown of emulsion,
Penetration degree: 80 (0.1mm);
5 ℃ of ductility: 20cm,
Softening temperature: 60 ℃,
Recovery of elasticity: 68%,
180 ℃ of rotary viscosity: 3.5Pa.s.
Embodiment 3
Get No. 90 pitch 1.5t in the Liaohe River, adopt cationic emulsifier, be emulsified into companion and type emulsified bitumen; Water intaking divides less than 5%, and metal content is less than 0.4%, and ash oontent is less than 8%; The order number is less than 20 order waste-tyre rubber-powder 0.2t, adds that to account for the rubber powder massfraction be 1.2% coupling agent, adds the acvator of rubber powder quality 0.3% again; In mixing tank, stirring at low speed (300～1000 rev/mins) 5 minutes is warming up to 150 ℃; Hold warm 60min; The cooling back adds 60% Combined Processing liquid of rubber powder quality, and Combined Processing liquid is made up of 2 mass parts SBR emulsions, 2 mass parts SBS emulsions and 6 mass parts soap lyes, and stirring at low speed (300～1000 rev/mins) is 5 minutes again; Rubber powder after the Combined Processing is added in the emulsified bitumen, use high-speed shearing machine more overground 3 times, make rubber powder modified asphalt, its performance index situation is:
The En Gela viscosity of rubber powder modified emulsified bitumen is 30,
5d is less than 5% for stability,
Attach area greater than 2/3 with the adhesivity of gathering materials for wrapping up in,
De-emulsification speed: split slowly;
(evaporation back residue) performance index are behind the breakdown of emulsion:
Penetration degree 78 (0.1mm),
5 ℃ of ductility: 20cm,
Softening temperature: 60 ℃,
Recovery of elasticity: 65%,
180 ℃ of rotary viscosity＞2.5Pa.s.
Embodiment 4
Get No. 90 pitch 1.5t in the Liaohe River, adopt cationic emulsifier, be emulsified into companion and type emulsified bitumen; Water intaking divides less than 5%, and metal content is less than 0.4%, and ash oontent is less than 8%; The order number is less than 20 order waste-tyre rubber-powder 0.5t, adds that to account for the rubber powder massfraction be 1.2% coupling agent, adds the acvator of rubber powder quality 0.3% again; In mixing tank, stirring at low speed (300～1000 rev/mins) 5 minutes is warming up to 150 ℃; Hold warm 60min; The cooling back adds 70% Combined Processing liquid of rubber powder quality, and Combined Processing liquid is that 2 mass parts SBS emulsions and 5 mass parts soap lyes are formed, and stirring at low speed (300～1000 rev/mins) is 5 minutes again; Rubber powder after the Combined Processing is added in the emulsified bitumen, stir, make rubber powder modified asphalt, its performance index situation is:
The En Gela viscosity of rubber powder modified emulsified bitumen is 25,
5d is less than 5% for stability,
Attach area greater than 2/3 with the adhesivity of gathering materials for wrapping up in,
De-emulsification speed splits in being;
(evaporation back residue) performance index do behind the breakdown of emulsion,
Penetration degree: 89 (0.1mm)
5 ℃ of ductility: 15cm,
Softening temperature: 55 ℃,
Recovery of elasticity: 62%,
180 ℃ of rotary viscosity: 1.5Pa.s.
Embodiment 5
Get No. 90 pitch 1.5t in the Liaohe River, adopt cationic emulsifier, be emulsified into companion and type emulsified bitumen; Water intaking divides less than 5%, and metal content is less than 0.4%, and ash oontent is less than 8%; The order number is less than 20 order waste-tyre rubber-powder 0.6t, adds that to account for the rubber powder massfraction be 1.5% coupling agent, adopts constant temperature oven to be warming up to 150 ℃; Hold warm 60min; The cooling back adds 80% Combined Processing liquid of rubber powder quality, and Combined Processing liquid is 2 mass parts SBS emulsions and 5 mass parts soap lyes, and stirring at low speed (300～1000 rev/mins) is 5 minutes again; Rubber powder after the Combined Processing is added in the emulsified bitumen, stir, make rubber powder modified asphalt, its performance index situation is:
The En Gela viscosity of rubber powder modified emulsified bitumen is 28,
5d is less than 5% for stability,
Attach area greater than 2/3 with the adhesivity of gathering materials for wrapping up in,
De-emulsification speed is for split slowly;
(evaporation back residue) performance index are behind the breakdown of emulsion:
Penetration degree: 86 (0.1mm)
5 ℃ of ductility: 18cm,
Softening temperature: 55 ℃,
Recovery of elasticity: 63%,
180 ℃ of rotary viscosity: 1.8Pa.s.
Embodiment 6
Get No. 90 pitch 1.5t in the Liaohe River, adopt cationic emulsifier, be emulsified into companion and type emulsified bitumen; Water intaking divides less than 5%, and metal content is less than 0.4%, and ash oontent is less than 8%; The order number is less than 20 order waste-tyre rubber-powder 0.4t, accounts for the rubber powder massfraction and be 1.5% coupling agent, adopts constant temperature oven to be warming up to 150 ℃; Hold warm 60min, the cooling back adds 90% Combined Processing liquid of rubber powder quality, and Combined Processing liquid is 2 mass parts shoddy emulsions and 5 mass parts soap lyes; Stirring at low speed (300～1000 rev/mins) is 5 minutes again, and the rubber powder after the Combined Processing is added in the emulsified bitumen, uses high-speed shearing machine more overground 3 times; Make rubber powder modified asphalt, its performance index situation is:
The En Gela viscosity of rubber powder modified emulsified bitumen is 23,
5d is less than 5% for stability,
Attach area greater than 2/3 with the adhesivity of gathering materials for wrapping up in,
De-emulsification speed can be soon split, in split and split slowly;
(evaporation back residue) performance index are behind the breakdown of emulsion:
Penetration degree: 84 (0.1mm)
5 ℃ of ductility: 13cm,
Softening temperature: 52 ℃,
Recovery of elasticity: 60%,
180 ℃ of rotary viscosity: 1.2Pa.s.
Embodiment 7
Get No. 90 pitch 2t in the Liaohe River, adopt cationic emulsifier, be emulsified into companion and type emulsified bitumen; Water intaking divides less than 5%, and metal content is less than 0.4%, and ash oontent is less than 8%, and the order number is less than 20 order waste-tyre rubber-powder 0.2t; Add that to account for the rubber powder massfraction be 1.2% coupling agent, add the acvator of rubber powder quality 0.3% again, in mixing tank; Stirring at low speed (300～1000 rev/mins) 5 minutes is warming up to 150 ℃, holds warm 60min; The cooling back adds 55% Combined Processing liquid of rubber powder quality, and Combined Processing liquid is soap lye, and stirring at low speed (300～1000 rev/mins) is 5 minutes again; Rubber powder after the Combined Processing is added in the emulsified bitumen, use high-speed shearing machine more overground 2 times, make rubber powder modified asphalt, its performance index are:
The En Gela viscosity of rubber powder modified emulsified bitumen is 20,
5d is less than 5% for stability,
Attach area greater than 2/3 with the adhesivity of gathering materials for wrapping up in,
De-emulsification speed: split slowly;
(evaporation back residue) performance is behind the breakdown of emulsion:
Penetration degree: 89 (0.1mm)
5 ℃ of ductility: 12cm,
Softening temperature: 53 ℃,
Recovery of elasticity: 55%,
180 ℃ of rotary viscosity: 1.1Pa.s.
Embodiment 8
Get No. 90 pitch 2t in the Liaohe River, adopt cationic emulsifier, be emulsified into companion and type emulsified bitumen; Water intaking divides less than 5%, and metal content is less than 0.4%, and ash oontent is less than 8%; The order number is less than 20 order waste-tyre rubber-powder 0.8t, adds the acvator of rubber powder quality 0.3%, in mixing tank; Stirring at low speed (300～1000 rev/mins) 5 minutes is warming up to 150 ℃, holds warm 60min; Add that to account for the rubber powder massfraction be 1.5% coupling agent, adopt constant temperature oven to be warming up to 150 ℃, hold warm 60min; The cooling back adds 65% Combined Processing liquid of rubber powder quality, and Combined Processing liquid is made up of 2 mass parts SBR emulsions, 2 mass parts shoddy emulsions and 6 mass parts soap lyes, and stirring at low speed (300～1000 rev/mins) is 5 minutes again; Rubber powder after the Combined Processing is added in the emulsified bitumen, use high-speed shearing machine more overground 1 time, make rubber powder modified asphalt, its performance index are:
The En Gela viscosity of rubber powder modified emulsified bitumen is 26,
5d is less than 5% for stability,
Attach area greater than 2/3 with the adhesivity of gathering materials for wrapping up in,
De-emulsification speed is for split slowly;
(evaporation back residue) performance index are behind the breakdown of emulsion:
Penetration degree: 89 (0.1mm)
5 ℃ of ductility: 15cm,
Softening temperature: 60 ℃,
Recovery of elasticity: 61%,
180 ℃ of rotary viscosity: 1.6Pa.s.
Embodiment 9
Get No. 90 pitch 2t in the Liaohe River, adopt cationic emulsifier, be emulsified into the spray-type emulsified bitumen; Water intaking divides less than 5%, and metal content is less than 0.4%, and ash oontent is less than 8%; The order number is less than 20 order waste-tyre rubber-powder 0.6t, adds that to account for the rubber powder massfraction be 1.2% coupling agent, adds the acvator of rubber powder quality 0.3% again; In mixing tank, stirring at low speed (300～1000 rev/mins) 5 minutes is warming up to 150 ℃; Hold warm 60min; The cooling back adds 75% Combined Processing liquid of rubber powder quality, and Combined Processing liquid is made up of 2 mass parts SBR emulsions, 2 mass parts shoddy emulsions and 6 mass parts soap lyes, and stirring at low speed (300～1000 rev/mins) is 5 minutes again; Rubber powder after the Combined Processing is added in the emulsified bitumen, use high-speed shearing machine more overground 2 times, make rubber powder modified asphalt, its performance index situation is:
The En Gela viscosity of rubber powder modified emulsified bitumen is 16,
5d is less than 5% for stability,
Attach area greater than 2/3 with the adhesivity of gathering materials for wrapping up in,
De-emulsification speed is for split soon;
(evaporation back residue) performance index are behind the breakdown of emulsion:
Penetration degree: 87 (0.1mm)
5 ℃ of ductility: 18cm,
Softening temperature: 56 ℃,
Recovery of elasticity: 65%,
180 ℃ of rotary viscosity: 1.5Pa.s.
Embodiment 10
Get No. 90 pitch 2t in the Liaohe River, adopt cationic emulsifier, be emulsified into the spray-type emulsified bitumen; Water intaking divides less than 5%, and metal content is less than 0.4%, and ash oontent is less than 8%; The order number is 1.5% coupling agent for account for the rubber powder massfraction less than 20 order waste-tyre rubber-powder 0.4t; Adopt constant temperature oven to be warming up to 150 ℃, hold warm 60min, the cooling back adds 85% Combined Processing liquid of rubber powder quality; Combined Processing liquid is made up of 2 mass parts SBR emulsions and 5 mass parts soap lyes, and stirring at low speed (300～1000 rev/mins) is 5 minutes again; Rubber powder after the Combined Processing is added in the emulsified bitumen, stir, make rubber powder modified asphalt, its performance index situation is:
The En Gela viscosity of rubber powder modified emulsified bitumen is 13,
5d is less than 5% for stability,
Attach area greater than 2/3 with the adhesivity of gathering materials for wrapping up in,
De-emulsification speed is for split soon;
(evaporation back residue) performance index are behind the breakdown of emulsion:
Penetration degree: 90 (0.1mm)
5 ℃ of ductility: 18cm,
Softening temperature: 56 ℃,
Recovery of elasticity: 66%,
180 ℃ of rotary viscosity: 1.8Pa.s.
Embodiment 11
Get No. 90 pitch 2t in the Liaohe River, adopt cationic emulsifier, be emulsified into the spray-type emulsified bitumen; Water intaking divides less than 5%, and metal content is less than 0.3%, and ash oontent is less than 8%; The order number is less than 20 order waste-tyre rubber-powder 0.3t, adds that to account for the rubber powder massfraction be 1.2% coupling agent, adds the acvator of rubber powder quality 0.3% again; In mixing tank, stirring at low speed (300～1000 rev/mins) 5 minutes is warming up to 150 ℃; Hold warm 60min; The cooling back adds 95% Combined Processing liquid of rubber powder quality, and Combined Processing liquid is made up of 2 mass parts shoddy emulsions and 8 mass parts soap lyes, and stirring at low speed (300～1000 rev/mins) is 5 minutes again; Rubber powder after the Combined Processing is added in the emulsified bitumen, stir, make rubber powder modified asphalt, its performance index situation is:
The En Gela viscosity of rubber powder modified emulsified bitumen is 18,
5d is less than 5% for stability,
Attach area greater than 2/3 with the adhesivity of gathering materials for wrapping up in,
De-emulsification speed is for split soon;
(evaporation back residue) performance index are behind the breakdown of emulsion:
Penetration degree: 89 (0.1mm)
5 ℃ of ductility: 17cm,
Softening temperature: 52 ℃,
Recovery of elasticity: 68%,
180 ℃ of rotary viscosity: 1.8Pa.s.
Comparative Examples 1:
Adopt the rubber asphalt processing units, get No. 90 pitch 10t in the Liaohe River, water intaking divides less than 5%; Metal content is less than 0.4%, and ash oontent is less than 8%, and the order number is 20-30 order waste tyre rubber powder 2t; The rubber powder volume is 20%, and pitch is heated to 195 ℃, after the adding rubber powder fully stirs; Grew 1 hour, developmental temperature is 190 ℃.Make rubber asphalt, keep temperature to be 190 ℃ and store 4 days, its performance is shown in the table 1.
Table 1
Comparative Examples 2
The rubber asphalt processing units is adopted in rubber asphalt production, gets No. 90 pitch 10t in the Liaohe River, and water intaking divides less than 5%; Metal content is less than 0.4%, and ash oontent is less than 8%, and the order number is 20-30 order waste tyre rubber powder 15t; The rubber powder volume is 15%, and pitch is heated to 195 ℃, after the adding rubber powder fully stirs; Grew 1 hour, developmental temperature is 190 ℃.Make rubber asphalt, keep temperature to be 190 ℃ and store 4 days, its performance is shown in the table 1.
Claims (3)
1. rubber powder modified emulsified bitumen; Mainly form by emulsified bitumen, rubber powder and Combined Processing liquid; It is characterized in that: macroscopic rubber powder particle is arranged in the said rubber powder modified emulsified bitumen; Wherein, the mass ratio of Asphalt Emulsion Evaporation Residue and rubber powder is 5:2～10:1, and the mass ratio of rubber powder and Combined Processing liquid is 1:1～2:1; Said Combined Processing liquid is that several kinds in SBS emulsion, SBR emulsion, shoddy emulsion, the soap lye are composited;
At normal temperatures, the En Gela viscosity of rubber powder modified emulsified bitumen is 2-30, and stable 5d attaches area greater than 2/3 with the adhesivity of gathering materials for wrapping up in less than 5%, de-emulsification speed for split soon, in a kind of in splitting or splitting slowly;
Behind the breakdown of emulsion, the correlation parameter of evaporation back residue is following: 5 ℃ of ductility＞10cm, softening temperature＞50 ℃, recovery of elasticity＞50%, 180 ℃ rotary viscosity＞0.5 Pa.s.
2. according to the described rubber powder modified emulsified bitumen of claim 1, it is characterized in that: said rubber powder be particle less than 20 purpose waste tyre rubber powders, and through surface treatment, its treatment process is that one or more method synthesis in desulfurization, activation, the silication are handled.
3. one kind according to the described rubber powder modified Preparation of Emulsification Asphalt of claim 1 method, and it is characterized in that: the concrete preparation process of rubber powder modified emulsified bitumen is following:
---bitumen production is become emulsified bitumen;
---rubber powder is carried out surface treatment, adopt one or more comprehensive treating processs in desulfurization, activation, the silicification method;
---preparation Combined Processing liquid, said Combined Processing liquid is composited by several kinds in SBS emulsion, SBR emulsion, shoddy emulsion, the soap lye;
---with rubber powder after the surface treatment and Combined Processing liquid, than for the mixed of 1:1～2:1 and stir, obtain the rubber powder after the Combined Processing according to respective quality;
---with the rubber powder after the Combined Processing with stir after the emulsified bitumen that has been prepared into mixes or overground 1～3 time of high-speed shearing machine after, promptly obtain the rubber powder modified emulsified bitumen.
Priority Applications (1)
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| CN104610766B (en) * | 2014-12-30 | 2017-05-03 | 南通福伦利新材料有限公司 | Efficient composite emulsion modifier |
| CN105670320B (en) * | 2016-03-22 | 2018-11-06 | 杭州天翔新型建材股份有限公司 | CA mortar anionic emulsified bitumens and preparation method thereof |
| CN108276911A (en) * | 2018-02-01 | 2018-07-13 | 四川邑诚科技有限公司 | Macromolecule waterproof adhesive powder, high polymer waterproof material and preparation method thereof |
| CN108559289B (en) * | 2018-05-14 | 2021-03-30 | 重庆路维康交通科技有限公司 | Nano modified emulsified asphalt and preparation and use methods thereof |
| CN109227999B (en) * | 2018-09-03 | 2020-04-10 | 东莞市超业塑胶制品有限公司 | Swelling development device for high-fracture-resistance SBS composite material and preparation process thereof |
| CN111057383B (en) * | 2018-10-17 | 2022-03-11 | 北京路德永泰环保科技有限公司 | Rubber modified emulsified asphalt and preparation method thereof |
| CN110372937A (en) * | 2019-08-02 | 2019-10-25 | 王云莲 | Organosilicon-emulsified asphalt glue powder material, Roof system and preparation method thereof |
| CN112394042A (en) * | 2020-12-17 | 2021-02-23 | 华运通达(广东)道路科技有限公司 | Method and system for measuring influence of rubber powder on demulsification speed of emulsified asphalt |
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