CN102838874B - Asphalt modifier, modified asphalt and asphalt mixture - Google Patents
Asphalt modifier, modified asphalt and asphalt mixture Download PDFInfo
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Abstract
The invention belongs to the field of road engineering, and particularly relates to a hyperviscous and high-elastic asphalt modifier applicable to steel bridge deck pavement. The asphalt modifier comprises the following raw materials in parts by weight: 3-10 parts of junked tire rubber powder, 3-10 parts of polyethylene wastes, 3-8 parts of styrene-butadiene-styrene block copolymer, 1-5 parts of styrene-isoprene-styrene block copolymer, 1-5 parts of terpene resin, 5-10 parts of solvent naphtha, and 0.3-0.7 part of alcohol ether carboxylate adhesion agent. In addition, a modified asphalt and a modified asphalt mixture are prepared on the basis of the modifier, the 60 DEG C dynamic viscosity of the modified asphalt prepared by applying the modifier can reach more than 300000Pa.s, and the performance grading reaches PG 88-28; and the asphalt mixture has favorable water stability, higher dynamic modulus, higher track dynamic stability and low temperature failure strain, and can resist complicated mechanics and temperature environment of a steel bridge deck.
Description
Technical field
The invention belongs to the road engineering field, be specifically related to a kind of high-viscosity high-elasticity asphalt properties-correcting agent that is applicable to paving steel bridge deck, and use this properties-correcting agent and make modifying asphalt and asphalt.
Background technology
The pitch bridge deck pavement structure is the thin-layer bituminous road surface (usually at 5-10cm) of a kind of making on steel bridge deck, and the aspects such as the travel safety during building up operation, comfortableness and aesthetic property all play vital effect to the quality of its quality for bridge.
The residing temperature of bridge deck pavement structure and load environment are compared the many of general road complexity, mainly contain following some: one, the temperature field is more harsh: because steel case beam has good temperature conduction, be vulnerable to the outside temperature variable effect, cause to reach below-10 ℃ under extreme temperature its winter, summer high temperature steel case top surface of the beam steel plate reaches more than 70 ℃, and temperature rate of change is larger, therefore high temperature performance, the resisting temperature fatigue property of material of paving course is proposed requirements at the higher level.Two, load stress of living in is complicated: the Oscillation Amplitude distortion of steel case beam own is larger, and distortion is complicated, and the layer that requires to mat formation has good chasing after from deformability with steel plate, can bear oscillatory load effect repeatedly and does not produce stress fatigue destruction; Simultaneously serious along with heavy duty, overloading, make the Steel Bridge Deck Pavement force and deformation than highway pavement or airstrip complexity many, the acting in conjunction of extreme temperature in addition makes Steel Bridge Deck Pavement the early diseases such as rut, hole groove, crack very easily occur.Therefore, paving steel bridge deck also must have enough intensity and suitable rigidity, good anti-fatigue performance, higher high-temperature stability, good resistance to cleavage, resistance to shear and distortion retinue property preferably except needs satisfy the basic demand on plain asphalt road surface.
At present bridge deck pavement bituminous cements used is adopted bituminous epoxy more, perhaps uses rubber powder and SBS(styrene-butadiene-styrene block copolymer) composite modified, perhaps adopt rock asphalt, lake pitch composite modified to bi tumenf orr oad.The advantage of bituminous epoxy is that the high distortion of intensity is little, but poor fatigue properties, early strength is on the low side, complicated construction technique, and engineering is longer curing cycle, involves great expense.And other modifying asphalt fatigue property is better than bituminous epoxy, construction technology is simple, but be difficult to adapt to distinct temperature and the force environment of bridge floor, rigidity, elasticity, toughness, distortion retinue property be deficiency significantly, 60 ℃ of kinetic viscosities of pitch are less, make its asphalt be prone to rut under the gravity laod effect, occur passing, embracing under the shearing stress effect of interface, in the large and compound distortion of temperature head effect lower steel plate distortion association from the relatively poor cracking that is prone to of property, the tired and relatively poor easy generation of load fatigue property of the resisting temperature problem such as ftracture, come off.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of asphalt modifier, and use this properties-correcting agent and make modifying asphalt and asphalt, to use more than 60 ℃ of kinetic viscosities of modifying asphalt that this properties-correcting agent makes can reach 300000Pa.s, the performance classification reaches PG88-28; Asphalt has good water stability, higher dynamic modulus, and higher rut dynamic stability and low temperature damage strain can be resisted mechanics and the temperature environment of Steel Bridge Deck complexity.
Asphalt modifier of the present invention, by weight, its raw material consists of: waste-tyre rubber-powder 3-10 part, polyethylene waste 3-10 part, styrene-butadiene-styrene block copolymer 3-8 part, styrene isoprene styrene block copolymer (SIS) 1-5 part, terpine resin 1-5 part, solvent oil 5-10 part, alcohol ether carboxylate interfacial agents 0.3-0.7 part.
Wherein, waste-tyre rubber-powder is normal temperature after the meridian steel wire in the junked tire powder and fiber removal to be pulverized obtain.The chemical nature of waste-tyre rubber-powder determines that it has good asphalt modification function, natural rubber wherein, synthetic rubber make pitch have broad elastic temperature operation interval, carbon black and a small amount of calcium oxide make pitch have good anti-aging and wear resistance, therefore waste-tyre rubber-powder is improving the pitch low temperature flexibility, is improving and have excellent effect aspect the pitch fatigue resistance, but its high-temperature behavior to pitch is improved not obvious, separately and during asphalt grouting and the consistency of pitch relatively poor, cause the pitch storage stability relatively poor.The waste-tyre rubber-powder consumption is excessive, and its abundant swelling in pitch makes the viscosity of modifying asphalt excessive, affects the construction workability of pitch; Consumption is too small, does not have obvious modified effect, and is not obvious to low temperature flexibility and the fatigue resistance improvement of pitch, therefore needs to control its consumption 3-10 part.
The polyethylene waste is take waste or used plastics as raw material, and " white garbage " that namely is commonly called as is starting materials, and high-temperature fusion adopts the screw machine extruding pelletization to obtain.This material improves significantly to the high-temperature stability of pitch, is used for improving the high temperature rutting resistance of pitch, significantly improves 60 ℃ of kinetic viscosities of pitch.Adopt the electron microscopic study polyethylene modified asphalt, can find to have the connection of cotton-shaped hair shape, there are some submissive curling polyethylene branches to mutually combine, form cross-linked structure, and it is folding crosslinked together to wrap up in multiple pitch, forms three-dimensional reticulated structure, thereby has enlarged the visco-elasticity scope of pitch, retrain pitch mobility under external force, improved thus viscosity and the anti-current dynamic deformation ability of pitch under the condition of high temperature.But independent role is relatively poor with the consistency of pitch, and the excessive low-temperature performance damage to pitch of its volume is larger, so its used in amounts will be limited to certain limit, and the contriver finds that through many experiments the properties-correcting agent effect that its consumption makes when being 3-10 part is better.The comprehensive above-mentioned effect description during separately with asphalt grouting for waste-tyre rubber-powder if polyethylene waste and waste-tyre rubber-powder are compound, has synergistic effect, improves both consistencies in pitch, jointly improves the high temperature performance of pitch.The contriver finds that through many experiments waste-tyre rubber-powder is also 3-10 part when the polyethylene waste is 3-10 part, and both synergies are better, when especially both amount ratios are 1:1, and best results.
Styrene-butadiene-styrene block copolymer SBS and styrene isoprene styrene block copolymer (SIS) SIS are thermoplastic elastomer.SBS is as good asphalt modifier, the high temperature performance of pitch all had some improvement, if but independent role, volume is larger usually, and its price is higher, and more worker wishes to seek its substitute.SIS is as good jointing compound, and is more in glue field application, is applied to asphalt modification, can improve pitch elasticity and bonding characteristic.Both are combined with under certain proportioning, have not only improved the high temperature performance of modifying asphalt but also have improved elasticity and the bonding characteristic of modifying asphalt, and can not cause production cost too high.
The resene product has certain effect aspect the matrix denseness improving, and is also good jointing compound.As high-viscosity high-elasticity asphalt properties-correcting agent, require it to improve viscous-elastic behaviour between pitch 50-90 ℃, make pitch have larger viscosity, but wish that pitch is lower the viscosity of 135 ℃, so that modifying asphalt has construction workability preferably.Therefore select softening temperature between 90-110 ℃, acid number is less than the terpine resin of 20mgKOH/g.This terpine resin, substantially flows in pitch during lower than 80 ℃ in temperature, plays anchorage effect; But when temperature reaches 90-100 ℃, at first begin to soften, improve pitch in the visco-elasticity more than 120 ℃, guarantee that 135 ℃ of modifying asphalts are not more than 6Pa.s, have good construction workability.
Described solvent oil can adopt conventional furfural extract oil, also can adopt the mixture of discarded edible oil and furfural extract oil.Discarded edible oil is food and drink or eating at home oil waste, and in higher fatty acid glyceryl ester wherein and properties-correcting agent, multiple high molecular polymer consistency is better; And furfural extract oil is rich aromatic component, can accelerate the swelling of properties-correcting agent in pitch, impels properties-correcting agent better compatible in pitch.Both compound uses improve for the consistency of modifying asphalt and have more excellent value.The contriver finds to work as both with weight ratio 1:1 compound tense by many experiments, can obtain effect preferably.
Described interfacial agents is alcohol ether carboxylate, for example AEC-9Na, AEC-10Na, AEC-H, and that wherein effect is best is AEC-10Na.Because existing asphalt modification means are physically modified; properties-correcting agent can not dissolve in asphalt system fully, usually exists with more tiny particle, under hot store status; these small particles can produce sedimentation under action of gravity, cause the segregation of modifying asphalt.And alcohol ether carboxylate can effectively reduce the interfacial tension of solia particle and pitch phase, increases the network structure intensity of modifying asphalt, improves elasticity and the toughness of modifying asphalt, guarantees the hot storage stability that modifying asphalt is long-term, does not emanate.
The contriver gropes to find through test of long duration, by weight, when the raw material of asphalt modifier consists of: 3 parts of waste-tyre rubber-powders, 3 parts, polyethylene waste, 6 parts of styrene-butadiene-styrene block copolymers, 2 parts of styrene isoprene styrene block copolymer (SIS), 4 parts of terpine resins, when 6 parts of solvent oils, 0.7 part of alcohol ether carboxylate interfacial agents, modified effect is best.
Prepare asphalt modifier of the present invention; its concrete steps are: solvent oil, alcohol ether carboxylate interfacial agents, styrene-butadiene-styrene block copolymer, polyethylene waste, waste-tyre rubber-powder, styrene isoprene styrene block copolymer (SIS), terpine resin is even 180-190 ℃ of down cut ground and mixed by weight proportion; by the twin screw extruder extruding pelletization; by the dicing machine pelletizing, get the high-viscosity high-elasticity modified asphalt modifier.Temperature is 180-190 ℃ can guarantee above-mentioned raw materials energy fusion-grafting, and can begin granulation.
In addition, the present invention uses above-mentioned asphalt modifier and has made a kind of modifying asphalt, and by weight, its raw material consists of: matrix pitch 70-80 part, asphalt modifier 15-30 part, stablizer 0.05-0.4 part.
Wherein, the consumption of properties-correcting agent is too small, can not give pitch significant modified effect, and it is not remarkable that the high temperature performance of pitch and anti-fatigue performance improve effect; The properties-correcting agent consumption is excessive, and the viscosity of modifying asphalt is excessive, affects the construction workability of pitch; In addition, the consumption of properties-correcting agent also need be considered the compatibility problem of properties-correcting agent in pitch, owing to adopting different superpolymer composite modifiers in the present invention, has synergy between different superpolymer, make composite post-modification agent have consistency preferably, but the consumption of properties-correcting agent also should be controlled in OK range.The contriver gropes to find when 78 parts of matrix pitches through test of long duration, and when 22 parts of properties-correcting agent, 0.3 part of stablizer, effect is best.
Described stablizer is vulcanizing agent, such as sulphur, tetra-sulfurized pair penta-methylene thiuram, N-(tolysulfonyl amido)-N'-diphenyl-para-phenylene diamine, nickel dibutyl dithiocarbamate etc., make properties-correcting agent and pitch generation crosslinking reaction, can improve the stability of properties-correcting agent in pitch, be the requisite part of modifying asphalt.
The preparation method of modifying asphalt of the present invention, its concrete steps are:
(1) matrix pitch is heated to flow state, is trimmed to and mixes;
(2) properties-correcting agent added said mixture in proportion under the high speed shear condition, temperature remains on 185-200 ℃, is trimmed to mix;
(3) keeping temperature is 185-200 ℃, and stablizer is added in said mixture in proportion, mixes;
(4) said mixture is stirred 1-3h in 175-185 ℃, can obtain the high-viscosity high-elasticity modifying asphalt.
When properties-correcting agent mixed with matrix pitch, temperature was 185-200 ℃, was conducive to modified grain swelling in matrix pitch, and strengthened the mobility of matrix pitch.In the present invention, the effect of stablizer be make properties-correcting agent and matrix pitch full cross-linked, crosslinked will make whole mixed system within the of short duration time than thickness, temperature is too low, be unfavorable for full cross-linked, therefore, when adding stablizer, controlling whole system temperature is 185-200 ℃.Until crosslinking reaction after for some time, can be with the temperature of whole mixed system suitable reduction, because keep for a long time high temperature easily to cause the aging of whole mixed system, therefore add stablizer, after whole mixed system is stable, greenhouse cooling can be stirred to get the high-viscosity high-elasticity modifying asphalt to 175-185 ℃.Can be because sedimentation cause segregation in order to ensure properties-correcting agent, churning time is 1-3h.
The prepared modifying asphalt of the present invention, its technical indicator sees Table 1; Table 2 is the performance classification results according to U.S. Superpave bituminous cements PG grade, according to ASTM D6373 standard.
Table 1 high-viscosity high-elasticity modified asphalt technology index
Table 2 high-viscosity high-elasticity modifying asphalt PG classification
By above-mentioned table 1 and as seen from Table 2, it is common that the high-viscosity high-elasticity modifying asphalt can reach PG88-28(, for modified effect preferably common modifying asphalt can reach PG76-28 or PG88-16, but only can improve wherein a kind of performance, if it is more difficult to take into account high temperature performance), has high temperature performance well, more than 60 ℃ of kinetic viscosities reach 600000Pa.s, 135 ℃ of viscosity are less than 6Pa.s, recovery of elasticity reaches 98%, and aging rear recovery of elasticity also reaches 90%, has good high temperature performance, deformability, construction workability are good, can adapt to the special environment of Steel Bridge Deck.
Take the above-mentioned modifying asphalt that makes as agglutinate, in accordance with China's " standard specification for construction and acceptance of highway asphalt pavement " F40-2004, take stone mastic asphalt SMA-5 as bridge deck pavement asphalt type, gradation composition and the asphalt content of the Marshall method of design designing asphalt mixture that code requirement F40-2004 requires.The property indices of SMA-5 asphalt is as shown in table 3,4,5.
Table 3 SMA-5 performance of asphalt mixture index
| Project | Characteristic standard | Test-results | Test method |
| Bitumen aggregate ratio/% | 6.7 | ||
| Voidage/% | 3~4 | 3.8 | T?0706 |
| Void in mineral aggregate/% | Be not less than 17.0 | 18.8 | T?0705 |
| Pitch saturation ratio/% | 75~85 | 79.7 | T?0705 |
| Coarse aggregate skeleton clearance rate/% | Be not more than VCA DRC | 42.5 | T?0705 |
| Xie Lunbao pitch is analysed the Lou binder loss/% of test | Be not more than 0.1 | 0.008 | T?0732-2011 |
| The compound loss of Superpave mix-design test or the test/% that disperses that soaks | Be not more than 5 | 1.18 | T?0733-2011 |
| The rut dynamic stability (60 ℃, 0.7MPa)/(inferior/min) | Be not less than 8000 | 12249 | T?0719-2011 |
| Freeze thawing Ratio of split strength/% | Be not less than 80 | 87 | T?0729-2000 |
| The low-temperature bending breaking strain (10 ℃, 5cm/min)/μ ε | Be not less than 2800 | 4438 | T?0715-2011 |
Table 4 SMA-5 Dynamic Modulus of Asphalt Mixture test-results (MPa)
The fatigue test of table 5 SMA-5 asphalt four-point bending
| Strain level/μ ε | The fatigue lifetime/time |
| 800 | 612580 |
| 1000 | 150420 |
1, as can be seen from Table 3 the rut dynamic stability (60 ℃, 0.7MPa) 12249 times/min, much larger than general modified asphalt mixture (general 4000-5000 time/min); The low-temperature bending breaking strain (10 ℃, 5cm/min) up to 4438 μ ε, and rubber modified mixes 3264 μ ε only, SBS rubber composite modified pitch compound is 3202 μ ε only, so this modified asphalt mixture has good low-temperature performance.
2, table 4 provides dynamic modulus data under differing temps, different frequency effect, and its 0.1Hz, 55 ℃ of dynamic moduluss have reached 372.7MPa, therefore has mechanical property preferably.
3, table 5 provides its differently strained level lower fatigue lifetime, the common modified asphalt mixture of comparing, and its fatigue lifetime is better.
Therefore, the modifying asphalt that above-mentioned high-viscosity high-elasticity properties-correcting agent is produced and modified asphalt mixture technical indicator satisfy the related specifications of country, and superior performance can satisfy the requirement of harsh Steel Bridge Deck Pavement.
In sum, the present invention has following beneficial effect:
When 1, preparing properties-correcting agent, adopt terpine resin as viscosity modifier, with high molecular polymer, good consistency is arranged, the properties-correcting agent that makes has improved the adhesion characteristics of pitch, improves 60 ℃ of viscosity of modifying asphalt low temperature, reduces by 135 ℃ of viscosity of pitch;
2, preparation is during modifying asphalt, as interfacial agents, can effectively reduce the interfacial tension of solia particle and pitch phase with alcohol ether carboxylate, increase the network structure intensity of modifying asphalt, improve elasticity and the toughness of modifying asphalt, guarantee the hot storage stability that modifying asphalt is long-term, do not emanate;
3, take full advantage of junked tire, waste or used plastics goods and discarded edible oil, realized utilization of waste material when improving asphalt modifier and performance of modified bitumen, reduced manufacturing cost, alleviate environmental protection pressure.
Embodiment
The below will carry out more specifically detailed explanation to the present invention, and raw material of the present invention is commercial.
Embodiment 1
A kind of asphalt modifier, by weight, its raw material consists of: 10 parts of waste-tyre rubber-powders, 6 parts, polyethylene waste, 3 parts of styrene-butadiene-styrene block copolymers, 3 parts of styrene isoprene styrene block copolymer (SIS), 3 parts of terpine resins, 6 parts of solvent oils, 0.6 part of alcohol ether carboxylate interfacial agents.Wherein, described terpine resin softening temperature is 90-110 ℃, and acid number is less than 20mgKOH/g.Described solvent oil is the mixture of discarded edible oil and furfural extract oil, and its weight ratio is 1:1; Described alcohol ether carboxylate interfacial agents is AEC-9Na.
The concrete preparation method of asphalt modifier is: solvent oil, alcohol ether carboxylate interfacial agents, styrene-butadiene-styrene block copolymer, polyethylene waste, waste-tyre rubber-powder, styrene isoprene styrene block copolymer (SIS), terpine resin is even 180 ℃ of down cut ground and mixed by weight proportion; by the twin screw extruder extruding pelletization; by the dicing machine pelletizing, get asphalt modifier.
Take the above-mentioned asphalt modifier that makes as raw material, make modifying asphalt, by weight, the raw material of modifying asphalt consists of: 70 parts of matrix pitches, 26 parts of asphalt modifiers, 0.1 part of vulcanizing agent.Described vulcanizing agent is sulphur.
The concrete steps of modifying asphalt are:
(1) matrix pitch is heated to flow state, is trimmed to and mixes;
(2) properties-correcting agent added said mixture in proportion under the high speed shear condition, temperature remains on 185 ℃, is trimmed to mix;
(3) keeping temperature is 185 ℃, and stablizer is added in said mixture in proportion, mixes;
(4) said mixture is stirred 2.5h in 175 ℃, can obtain the high-viscosity high-elasticity modifying asphalt.
Take the above-mentioned modifying asphalt that makes as agglutinate, in accordance with China's " standard specification for construction and acceptance of highway asphalt pavement " F40-2004, make asphalt take stone mastic asphalt SMA-5 as bridge deck pavement asphalt type, wherein, modifying asphalt is 6.7% of mixture total weight amount.
Embodiment 2
A kind of asphalt modifier, by weight, its raw material consists of: 3 parts of waste-tyre rubber-powders, 10 parts, polyethylene waste, 5 parts of styrene-butadiene-styrene block copolymers, 4 parts of styrene isoprene styrene block copolymer (SIS), 2 parts of terpine resins, 9 parts of solvent oils, 0.4 part of alcohol ether carboxylate interfacial agents.Wherein, described terpine resin softening temperature is 90-110 ℃, and acid number is less than 20mgKOH/g.Described solvent oil is furfural extract oil; Described alcohol ether carboxylate interfacial agents is AEC-10Na.
The concrete preparation method of asphalt modifier is: solvent oil, alcohol ether carboxylate interfacial agents, styrene-butadiene-styrene block copolymer, polyethylene waste, waste-tyre rubber-powder, styrene isoprene styrene block copolymer (SIS), terpine resin is even 190 ℃ of down cut ground and mixed by weight proportion; by the twin screw extruder extruding pelletization; by the dicing machine pelletizing, get asphalt modifier.
Take the above-mentioned asphalt modifier that makes as raw material, make modifying asphalt, by weight, the raw material of modifying asphalt consists of: 80 parts of matrix pitches, 22 parts of asphalt modifiers, 0.2 part of vulcanizing agent.Described vulcanizing agent is sulphur.
Its concrete steps of modifying asphalt are:
(1) matrix pitch is heated to flow state, is trimmed to and mixes;
(2) properties-correcting agent added said mixture in proportion under the high speed shear condition, temperature remains on 188 ℃, is trimmed to mix;
(3) keeping temperature is 188 ℃, and stablizer is added in said mixture in proportion, mixes;
(4) said mixture is stirred 1.5h in 177 ℃, can obtain the high-viscosity high-elasticity modifying asphalt.
Be agglutinate with the above-mentioned modifying asphalt that makes, in accordance with China's " standard specification for construction and acceptance of highway asphalt pavement " F40-2004, make asphalt take stone mastic asphalt SMA-5 as bridge deck pavement asphalt type, wherein, modifying asphalt is 6.7% of mixture total weight amount.
Embodiment 3
A kind of asphalt modifier, by weight, its raw material consists of: 6 parts of waste-tyre rubber-powders, 8 parts, polyethylene waste, 4 parts of styrene-butadiene-styrene block copolymers, 2 parts of styrene isoprene styrene block copolymer (SIS), 4 parts of terpine resins, 7 parts of solvent oils, 0.3 part of alcohol ether carboxylate interfacial agents.Wherein, described terpine resin softening temperature is 90-110 ℃, and acid number is less than 20mgKOH/g.Described solvent oil is the mixture of discarded edible oil and furfural extract oil, and its weight ratio is 1:1; Described alcohol ether carboxylate interfacial agents is AEC-9Na.
The concrete preparation method of asphalt modifier is: solvent oil, alcohol ether carboxylate interfacial agents, styrene-butadiene-styrene block copolymer, polyethylene waste, waste-tyre rubber-powder, styrene isoprene styrene block copolymer (SIS), terpine resin is even 185 ℃ of down cut ground and mixed by weight proportion; by the twin screw extruder extruding pelletization; by the dicing machine pelletizing, get asphalt modifier.
Take the above-mentioned asphalt modifier that makes as raw material, make modifying asphalt, by weight, the raw material of modifying asphalt consists of: 72 parts of matrix pitches, 18 parts of asphalt modifiers, 0.3 part of vulcanizing agent.Described vulcanizing agent is nickel dibutyl dithiocarbamate.
Its concrete steps of modifying asphalt are:
(1) matrix pitch is heated to flow state, is trimmed to and mixes;
(2) properties-correcting agent added said mixture in proportion under the high speed shear condition, temperature remains on 192 ℃, is trimmed to mix;
(3) keeping temperature is 192 ℃, and stablizer is added in said mixture in proportion, mixes;
(4) said mixture is stirred 1h in 185 ℃, can obtain the high-viscosity high-elasticity modifying asphalt.
Be agglutinate with the above-mentioned modifying asphalt that makes, in accordance with China's " standard specification for construction and acceptance of highway asphalt pavement " F40-2004, make asphalt take stone mastic asphalt SMA-5 as bridge deck pavement asphalt type, wherein, modifying asphalt is 6.7% of mixture total weight amount.
Embodiment 4
A kind of asphalt modifier, by weight, its raw material consists of: 4.5 parts of waste-tyre rubber-powders, 5 parts, polyethylene waste, 8 parts of styrene-butadiene-styrene block copolymers, 5 parts of styrene isoprene styrene block copolymer (SIS), 1 part of terpine resin, 10 parts of solvent oils, 0.5 part of alcohol ether carboxylate interfacial agents.Wherein, described terpine resin softening temperature is 90-110 ℃, and acid number is less than 20mgKOH/g.Described solvent oil is the mixture of discarded edible oil and furfural extract oil, and its weight ratio is 1:1; Described alcohol ether carboxylate interfacial agents is AEC-10Na.
The concrete preparation method of asphalt modifier is: solvent oil, alcohol ether carboxylate interfacial agents, styrene-butadiene-styrene block copolymer, polyethylene waste, waste-tyre rubber-powder, styrene isoprene styrene block copolymer (SIS), terpine resin is even 182 ℃ of down cut ground and mixed by weight proportion; by the twin screw extruder extruding pelletization; by the dicing machine pelletizing, get asphalt modifier.
Take the above-mentioned asphalt modifier that makes as raw material, make modifying asphalt, by weight, the raw material of modifying asphalt consists of: 74 parts of matrix pitches, 30 parts of asphalt modifiers, 0.05 part of vulcanizing agent.Described vulcanizing agent is N-(tolysulfonyl amido)-N'-diphenyl-para-phenylene diamine.
Its concrete steps of modifying asphalt are:
(1) matrix pitch is heated to flow state, is trimmed to and mixes;
(2) properties-correcting agent added said mixture in proportion under the high speed shear condition, temperature remains on 196 ℃, is trimmed to mix;
(3) keeping temperature is 196 ℃, and stablizer is added in said mixture in proportion, mixes;
(4) said mixture is stirred 2h in 180 ℃, can obtain the high-viscosity high-elasticity modifying asphalt.
Be agglutinate with the above-mentioned modifying asphalt that makes, in accordance with China's " standard specification for construction and acceptance of highway asphalt pavement " F40-2004, make asphalt take stone mastic asphalt SMA-5 as bridge deck pavement asphalt type, wherein, modifying asphalt is 6.7% of mixture total weight amount.
Embodiment 5
A kind of asphalt modifier, by weight, its raw material consists of: 8 parts of waste-tyre rubber-powders, 3 parts, polyethylene waste, 7 parts of styrene-butadiene-styrene block copolymers, 1 part of styrene isoprene styrene block copolymer (SIS), 5 parts of terpine resins, 5 parts of solvent oils, 0.7 part of alcohol ether carboxylate interfacial agents.Wherein, described terpine resin softening temperature is 90-110 ℃, and acid number is less than 20mgKOH/g.Described solvent oil is furfural extract oil; Described alcohol ether carboxylate interfacial agents is AEC-H.
The concrete preparation method of asphalt modifier is: solvent oil, alcohol ether carboxylate interfacial agents, styrene-butadiene-styrene block copolymer, polyethylene waste, waste-tyre rubber-powder, styrene isoprene styrene block copolymer (SIS), terpine resin is even 187 ℃ of down cut ground and mixed by weight proportion; by the twin screw extruder extruding pelletization; by the dicing machine pelletizing, get asphalt modifier.
Take the above-mentioned asphalt modifier that makes as raw material, make modifying asphalt, by weight, the raw material of modifying asphalt consists of: 76 parts of matrix pitches, 15 parts of asphalt modifiers, 0.4 part of vulcanizing agent.Described vulcanizing agent is tetra-sulfurized pair penta-methylene thiuram.
Its concrete steps of modifying asphalt are:
(1) matrix pitch is heated to flow state, is trimmed to and mixes;
(2) properties-correcting agent added said mixture in proportion under the high speed shear condition, temperature remains on 200 ℃, is trimmed to mix;
(3) keeping temperature is 200 ℃, and stablizer is added in said mixture in proportion, mixes;
(4) said mixture is stirred 3h in 179 ℃, can obtain the high-viscosity high-elasticity modifying asphalt.
Be agglutinate with the above-mentioned modifying asphalt that makes, in accordance with China's " standard specification for construction and acceptance of highway asphalt pavement " F40-2004, make asphalt take stone mastic asphalt SMA-5 as bridge deck pavement asphalt type, wherein, modifying asphalt is 6.7% of mixture total weight amount.
Embodiment 6
A kind of asphalt modifier, by weight, its raw material consists of: 3 parts of waste-tyre rubber-powders, 3 parts, polyethylene waste, 6 parts of styrene-butadiene-styrene block copolymers, 2 parts of styrene isoprene styrene block copolymer (SIS), 4 parts of terpine resins, 6 parts of solvent oils, 0.7 part of alcohol ether carboxylate interfacial agents.Wherein, described terpine resin softening temperature is 90-110 ℃, and acid number is less than 20mgKOH/g.Described solvent oil is furfural extract oil; Described alcohol ether carboxylate interfacial agents is AEC-10Na.
The concrete preparation method of asphalt modifier is: solvent oil, alcohol ether carboxylate interfacial agents, styrene-butadiene-styrene block copolymer, polyethylene waste, waste-tyre rubber-powder, styrene isoprene styrene block copolymer (SIS), terpine resin is even 187 ℃ of down cut ground and mixed by weight proportion; by the twin screw extruder extruding pelletization; by the dicing machine pelletizing, get asphalt modifier.
Take the above-mentioned asphalt modifier that makes as raw material, make modifying asphalt, by weight, the raw material of modifying asphalt consists of: 78 parts of matrix pitches, 22 parts of properties-correcting agent, 0.3 part of stablizer.Described vulcanizing agent is sulphur.
Its concrete steps of modifying asphalt are:
(1) matrix pitch is heated to flow state, is trimmed to and mixes;
(2) properties-correcting agent added said mixture in proportion under the high speed shear condition, temperature remains on 200 ℃, is trimmed to mix;
(3) keeping temperature is 200 ℃, and stablizer is added in said mixture in proportion, mixes;
(4) said mixture is stirred 3h in 179 ℃, can obtain the high-viscosity high-elasticity modifying asphalt.
Be agglutinate with the above-mentioned modifying asphalt that makes, in accordance with China's " standard specification for construction and acceptance of highway asphalt pavement " F40-2004, make asphalt take stone mastic asphalt SMA-5 as bridge deck pavement asphalt type, wherein, modifying asphalt is 6.7% of mixture total weight amount.
Claims (9)
1. asphalt modifier, it is characterized in that: by weight, its raw material consists of: waste-tyre rubber-powder 3-10 part, polyethylene waste 3-10 part, styrene-butadiene-styrene block copolymer 3-8 part, styrene isoprene styrene block copolymer (SIS) 1-5 part, terpine resin 1-5 part, solvent oil 5-10 part, alcohol ether carboxylate interfacial agents 0.3-0.7 part;
Described terpine resin softening temperature is 90-110 ℃, and acid number is less than 20mgKOH/g.
2. asphalt modifier according to claim 1, it is characterized in that: by weight, its raw material consists of: 3 parts of waste-tyre rubber-powders, 3 parts, polyethylene waste, 6 parts of styrene-butadiene-styrene block copolymers, 2 parts of styrene isoprene styrene block copolymer (SIS), 4 parts of terpine resins, 6 parts of solvent oils, 0.7 part of alcohol ether carboxylate interfacial agents.
3. asphalt modifier according to claim 1, it is characterized in that: described solvent oil is the mixture of furfural extract oil or discarded edible oil and furfural extract oil.
4. asphalt modifier according to claim 3 is characterized in that: in the mixture of described discarded edible oil and furfural extract oil, the weight ratio of discarded edible oil and furfural extract oil is 1:1.
5. the method for preparing asphalt modifier claimed in claim 1; it is characterized in that: its concrete steps are: solvent oil, alcohol ether carboxylate interfacial agents, styrene-butadiene-styrene block copolymer, polyethylene waste, waste-tyre rubber-powder, styrene isoprene styrene block copolymer (SIS), terpine resin is even 180-190 ℃ of down cut ground and mixed by weight proportion; by the twin screw extruder extruding pelletization; by the dicing machine pelletizing, get asphalt modifier.
6. modifying asphalt, it is characterized in that: comprise the described asphalt modifier of any one in claim 1-2, by weight, its raw material consists of: matrix pitch 70-80 part, asphalt modifier 15-30 part, stablizer 0.05-0.4 part.
7. modifying asphalt according to claim 6, it is characterized in that: described stablizer is vulcanizing agent.
8. prepare the method for modifying asphalt claimed in claim 6, it is characterized in that: its concrete steps are:
(1) matrix pitch is heated to flow state, is trimmed to and mixes;
(2) properties-correcting agent added said mixture in proportion under the high speed shear condition, temperature remains on 185-200 ℃, is trimmed to mix;
(3) keeping temperature is 185-200 ℃, and stablizer is added in said mixture in proportion, mixes;
(4) said mixture is stirred 1-3h in 175-185 ℃, can obtain the high-viscosity high-elasticity modifying asphalt.
9. asphalt is characterized in that: be mixed with the described modifying asphalt of claim 6-7 any one by gathering materials and form.
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