CN103602084A - Improved pavement asphalt mixture and preparation method thereof - Google Patents
Improved pavement asphalt mixture and preparation method thereof Download PDFInfo
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- CN103602084A CN103602084A CN201310595618.2A CN201310595618A CN103602084A CN 103602084 A CN103602084 A CN 103602084A CN 201310595618 A CN201310595618 A CN 201310595618A CN 103602084 A CN103602084 A CN 103602084A
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Abstract
The invention discloses an improved pavement asphalt mixture, comprising the following components in parts by weight: 5-90 parts of petroleum asphalt, 5-90 parts of coal pitch, 0.2-6 parts of modified nano material and 1-15 parts of composite interface modifier. The improved pavement asphalt mixture has the advantages of being low in cost, long in service life and excellent in performance.
Description
Technical field
The invention belongs to a kind of road modified asphalt and preparation method thereof, be specifically related to mix asphalt and preparation method thereof for a kind of modification road.
Background technology
Road bitumen is as the main raw of road construction, the underproduce skewness again of petroleum pitch, price is also along with the rise of oil price is also promoting gradually, and coal-tar pitch drug on the market, low price, have again wetting and adhesion property preferably, anti-oil corrosion performance is good, large with the surface friction coefficient of coal-tar pitch making.So by petroleum pitch and the mixed and modified use of coal-tar pitch, that will extenuate the problems such as resource shortage that road bitumen faces and Pavement Condition defect effectively.
Petroleum pitch and coal-tar pitch are mixed to use at present having been reported and using both at home and abroad, as far back as the 60 to 70's of last century, just started coal-tar pitch and petroleum pitch blend abroad as the research of road-making material.Using Germany, Poland and the developed country as representative such as French by coal-tar pitch and petroleum pitch blended composite modified asphalt as motorway road-making material.Chinese patent CN101386707A is only simply mixed and modified by coal-tar pitch and petroleum pitch; CN101508789A, mixes coal-tar pitch with petroleum pitch, added a certain amount of organic polymer material simultaneously; Chinese patent CN101081933A is in mixing and emulsifying pitch, inorganic materials and inorganic nano material have been added, gained emulsion is applied to motorway and common road crack repairing and filleting and repairs, this patent has demonstrated the prospect that inorganic nano material is applied in mixing and emulsifying pitch, but is not applied to large-scale road asphalt material;
Before comprehensive, data is visible, its technique is have two kinds of pitches are mixed simply substantially, when having plenty of mixing, add certain organic high molecular polymer study on the modification in addition, although obtained certain success, but exist cost higher, merely add the impact that organism is subject to oxygen and ultraviolet ray and moisture in air simultaneously, and the ageing resistance that makes road surface a little less than, affect work-ing life on road surface.
Summary of the invention
The object of this invention is to provide a kind of cost low, long service life, mix asphalt and preparation method thereof for the modification road of excellent performance.
Nano material has obtained good effect because of four application of large effect in every field of its uniqueness, the present invention has utilized nano material and tensio-active agent technology to carry out modification to mixing petroleum pitch and coal-tar pitch, nanoparticle is dispersed better in mix asphalt system after surface modification, its performance of gained nano modification mix asphalt has a very large change, reached the service requirements of bitumen for road use, weathering resistance strengthens, elasticity, wear resistance, anti-heavily loaded ability also strengthens, the nano material particularly adding has uvioresistant and antioxidant property, the ageing resistance of modifying asphalt is obviously strengthened, the application of this product will increase life cycle and the life-span of high-grade highway, and added nano material and dosage of surfactant little, mix and used coal-tar pitch, price is low, can make the cost of bitumen for road use obviously reduce.Also utilized fully coal-tar pitch resource, avoided the pollution to environment in its combustion processes, reached the object that makes full use of resource simultaneously.
Nano-material modified road of the present invention is composed as follows by mix asphalt mass parts:
5～90 parts, petroleum pitch
5～90 parts of coal-tar pitch
0.2～6 part of modified Nano material
1～15 part of compound interface properties-correcting agent.
Modified Nano material as above is prepared by the following method:
(1) preparing metal salt brine solution, its volumetric molar concentration is 0.02～1.0mol/L;
(2) properties-correcting agent is added to step (1) aqueous metal salt, its add-on is the 1.5wt ‰～5wt% of metal ion weight in metal-salt, obtains mixing solutions;
(3) preparation alkali aqueous solution, its volumetric molar concentration is 0.04～2.0mol/L;
(4) step (3) alkali aqueous solution being added drop-wise to step (2) produces in mixing solutions, rotating speed with 500～10000r/min must precipitate at 40 ℃～105 ℃ reaction 30min～1hr, and wherein the consumption of alkali is the amount of 1～4 times mole of metal ion in step (1) aqueous metal salt;
(5) sedimentation and filtration of step (4), washing, 100～250 ℃ is dry, obtain modified Nano material.
Described metal-salt is one or both of magnesium sulfate, zinc sulfate, Tai-Ace S 150.
Described alkali is sodium carbonate, bicarbonate of ammonia, salt of wormwood or sodium bicarbonate;
Described properties-correcting agent be titanic acid ester, Aluminate, stearic one or more.
Described modified Nano material is zinc subcarbonate, magnesium basic carbonate, the compound subcarbonate of zinc-magnesium or Mg-Al composite subcarbonate.
The particle diameter of described modified Nano material is at 3nm～90nm.
The purposes Shi road of described modified Nano material is with applying in coal tar pitch modification process.
Compound interface properties-correcting agent as above is prepared by the following method:
Take 40～60 parts of sodium alkyl benzene sulfonates, then take 20～40 parts of nonionogenic tenside AEO-9, join in 80～120 parts of solvent oils, be heated to 70～80 degree, mixing and stirring, obtains making by oneself compound interface properties-correcting agent.
Described solvent oil is that weight ratio is fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture.
Coal-tar pitch as above is medium temperature coal pitch or low temperature coal-tar pitch.
Preparation method of the present invention comprises the steps:
(1) by petroleum pitch and the fusing of coal-tar pitch Hybrid Heating, obtain mix asphalt;
(2) by modified Nano material and compound interface properties-correcting agent, join in mix asphalt, at 70 ℃～140 ℃, under the rotating speed with 1500～4000r/min, utilize high dispersive boxshear apparatus to stir rapidly 10～40min, obtain modification road mix asphalt.
The present invention compared with prior art tool has the following advantages:
(1), due to the nano material of using with dosage of surfactant is little, and mix and used coal-tar pitch, price is low, can make the cost of bitumen for road use obviously reduce.
(2) modifying process adds nano material and compound interface promoting agent, can make modification mix asphalt have antiultraviolet and ageing resistance.
(3) this nano modification mix asphalt technique preparation process is simple and easy to do, is easy to suitability for industrialized production.
(4) the mixed and modified pitch that prepared by this technique has that good weathering resistance, high temperature are not trickled, not embrittlement of low temperature, wear resistance is good, bearing capacity is strong, have very strong ageing resistance, and cost performance is high, is a kind of road-making material with broad prospect of application.
Embodiment
Embodiment 1:
(1) prepare modified Nano material: the zinc sulfate solution 500ml that compound concentration is 0.02mol/L is heated to 60 ℃, then add 1.5wt ‰ Zn
2+the Aluminate of amount, stirs; The aqueous sodium carbonate 350ml that compound concentration is 0.04mol/L is more slowly added drop-wise to above-mentioned solution and constantly stirs with the speed of 500r/min, stirs after 30min, and filtered while hot is constantly washed with tap water, to SO
4 2-till ion completely dissolve.In air dry oven, in 120 ℃ of oven dry, obtain the zinc subcarbonate that median size is 35nm.
(2) prepare compound interface properties-correcting agent: take 60 parts of sodium alkyl benzene sulfonates, take again 40 parts of nonionogenic tenside AEO-9, join 80 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 80 ℃, mixing and stirring, obtains making by oneself compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 5 parts, petroleum pitch and 90 parts of heat fused of medium temperature coal pitch, again the nanometer zinc subcarbonate of 0.2 part of Aluminate modification and 15 parts of self-control compound interface properties-correcting agent are joined in mix asphalt, be uniformly mixed, controlling mix asphalt modified-reaction temperature is 90 ℃, utilize under the fast rotating speed with 4000r/min of high dispersive boxshear apparatus, whip modified reaction 40min, obtains nano modification road mix asphalt.Its performance characterization result is: 43.8 ℃ of softening temperatures, and penetration degree 74mm(25 ℃, 100g), and ductility > 100cm(15 ℃), reach bitumen for road use performance index.Quality change ± 0.3 after TFOT, ageing resistance obviously strengthens.
Embodiment 2:
(1) prepare modified Nano material: the zinc sulfate solution 500ml that compound concentration is 0.04mol/L is heated to 80 ℃, then add 4wt ‰ Zn
2+the titanic acid ester of amount, stirs; The wet chemical 10ml that compound concentration is 2mol/L again, the speed slowly dripping with 10000r/min constantly stirs, and stirs after 30min, and filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In air dry oven, in 180 ℃ of oven dry, obtain the zinc subcarbonate that median size is 75nm.
(2) prepare compound interface properties-correcting agent: take 40 parts of sodium alkyl benzene sulfonates, take again 20 parts of nonionogenic tenside AEO-9, join 120 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 70 ℃, mixing and stirring, obtains making by oneself compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 10 parts, petroleum pitch and 80 parts of heat fused of low temperature coal-tar pitch, the nanometer zinc subcarbonate and the 15 parts of self-control compound interface properties-correcting agent that take the titanic acid ester modification of 0.5 part add in mix asphalt again, after being uniformly mixed, controlling mix asphalt modified-reaction temperature is 90 ℃, utilize under the fast rotating speed with 3000r/min of high dispersive boxshear apparatus, whip modified reaction 40min, obtains nano modification road mix asphalt.Its performance characterization result is: 43.2 ℃ of softening temperatures, and penetration degree 70mm(25 ℃, 100g), and ductility > 100cm(15 ℃), reach bitumen for road use performance index.Quality change ± 0.1 after TFOT, ageing resistance obviously strengthens.
Embodiment 3:
Modification mix asphalt preparation process following (1) is prepared modified Nano material: the magnesium sulfate solution 500ml that compound concentration is 0.08mol/L is heated to 60 ℃, then adds 1wt%Mg
2+stearic acid and the titanic acid ester (mass ratio 1:1) of amount, stir; The aqueous sodium carbonate 800ml that compound concentration is 0.08mol/L again, slowly drips and constantly stirs with the speed of 5000r/min, stirs after 30min, and filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In air dry oven, in 250 ℃ of oven dry, obtain the magnesium basic carbonate that median size is 40nm, this material adds approach with in the modified system of coal-tar pitch, can improve significantly softening temperature and the penetration degree of modified coal pitch, is a good properties-correcting agent.
(2) prepare compound interface properties-correcting agent: take 40 parts of sodium alkyl benzene sulfonates, take again 40 parts of nonionogenic tenside AEO-9, join 120 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 70 ℃, mixing and stirring, obtains making by oneself compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 90 parts, petroleum pitch and 5 parts of heat fused of low temperature coal-tar pitch, again the nanometer magnesium basic carbonate of 6 parts of stearic acid and titanic acid ester modification and 1 part of self-control compound interface properties-correcting agent are added in mix asphalt, after being uniformly mixed, controlling mix asphalt modified-reaction temperature is 90 ℃, utilize under the fast rotating speed with 4000r/min of high dispersive boxshear apparatus, whip modified reaction 10min, obtains nano modification road mix asphalt.Its performance characterization result is: 45 ℃ of softening temperatures, and penetration degree 86mm(25 ℃, 100g), and ductility > 100cm(15 ℃), reach bitumen for road use performance index.Quality change ± 0.2 after TFOT, ageing resistance obviously strengthens
Embodiment 4:
Modification mix asphalt preparation process following (1) is prepared modified Nano material: the magnesium sulfate solution 250ml Hybrid Heating to 70 ℃ of the zinc sulfate solution 250ml that compound concentration is 0.10mol/L and 0.10mol/L, then add 8wt ‰ Mg
2+and Zn
2+the stearic acid of amount, stirs; The wet chemical 700ml that compound concentration is 0.20mol/L again, slowly drips and constantly stirs with the speed of 4000r/min, stirs after 30min, and filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In air dry oven, in 140 ℃ of oven dry, obtaining median size is the compound subcarbonate of zinc-magnesium of 80nm.
(2) prepare compound interface properties-correcting agent: take 40 parts of sodium alkyl benzene sulfonates, take again 30 parts of nonionogenic tenside AEO-9, join 100 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 75 ℃, mixing and stirring, obtains making by oneself compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 20 parts, petroleum pitch and 80 parts of heat fused of low temperature coal-tar pitch, again 2 parts of stearic acid modified compound subcarbonates of nanometer zinc-magnesium and 12 parts of self-control compound interface properties-correcting agent are joined in mix asphalt, after being uniformly mixed, controlling mix asphalt modified-reaction temperature is 140 ℃, utilize under the fast rotating speed with 3500r/min of high dispersive boxshear apparatus, whip modified reaction 50min, obtains nano modification road mix asphalt.Its performance characterization result is: 44 ℃ of softening temperatures, and penetration degree 72mm(25 ℃, 100g), and ductility > 100cm(15 ℃), reach bitumen for road use performance index.Quality change ± 0.2 after TFOT, ageing resistance obviously strengthens
Embodiment 5:
Modification mix asphalt preparation process following (1) is prepared modified Nano material: the aluminum sulfate aqueous solution 250ml Hybrid Heating to 80 ℃ of the magnesium sulfate solution 250ml that compound concentration is 0.10mol/L and 0.05mol/L, then add 4wt%Mg
2+stearic acid and the Aluminate (mass ratio 1:1) of amount, stir; The aqueous sodium carbonate 700ml that compound concentration is 0.20mol/L again, slowly drips and constantly stirs with the speed of 4000r/min, stirs after 30min, and filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In air dry oven, in 200 ℃ of oven dry, obtaining median size is the Mg-Al composite subcarbonate of 90nm.
(2) prepare compound interface properties-correcting agent: take 40 parts of sodium alkyl benzene sulfonates, take again 30 parts of nonionogenic tenside AEO-9, join 100 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 75 ℃, mixing and stirring, obtains making by oneself compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 20 parts, petroleum pitch and 80 parts of heat fused of medium temperature coal pitch, again 4 parts of stearic acid and the composite modified compound subcarbonate of nanometer zinc-magnesium and the 12 parts of self-control compound interface properties-correcting agent of Aluminate are joined in mix asphalt, after being uniformly mixed, controlling mix asphalt modified-reaction temperature is 130 ℃, utilize under the fast rotating speed with 2000r/min of high dispersive boxshear apparatus, whip modified reaction 30min, obtains nano modification road mix asphalt.Its performance characterization result is: 43.5 ℃ of softening temperatures, and penetration degree 70mm(25 ℃, 100g), and ductility > 100cm(15 ℃), reach bitumen for road use performance index.Quality change ± 0.3 after TFOT, ageing resistance obviously strengthens
Embodiment 6:
Modification mix asphalt preparation process following (1) is prepared modified Nano material: the magnesium sulfate solution 500ml that compound concentration is 0.02mol/L is heated to 40 ℃, then adds 3wt%Mg
2+titanic acid ester and the stearic acid (mass ratio 1:1) of amount, stir; Join this magnesium sulfate solution, then the compound concentration sodium bicarbonate aqueous solution 600ml that is 0.04mol/L, slowly drip and constantly stir with the speed of 3000r/min, stir after 30min, filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In air dry oven, in 130 ℃ of oven dry, obtain the magnesium basic carbonate that median size is 10nm.This material adds approach with in the modified system of coal-tar pitch, can improve significantly softening temperature and the penetration degree of modified coal pitch, is a good properties-correcting agent.
(2) prepare compound interface properties-correcting agent: take 40 parts of sodium alkyl benzene sulfonates, take again 20 parts of nonionogenic tenside AEO-9, join 90 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 70 ℃, mixing and stirring, obtains making by oneself compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 30 parts, petroleum pitch and 70 parts of heat fused of low temperature coal-tar pitch, again 0.8 part of titanic acid ester and composite modified nanometer magnesium basic carbonate and the 10 parts of self-control compound interface properties-correcting agent of stearic acid are added in mix asphalt, after being uniformly mixed, controlling mix asphalt modified-reaction temperature is 100 ℃, utilize under the fast rotating speed with 4000r/min of high dispersive boxshear apparatus, whip modified reaction 20min, obtains nano modification road mix asphalt.Its performance characterization result is: 46 ℃ of softening temperatures, and penetration degree 65mm(25 ℃, 100g), and ductility > 100cm(15 ℃), reach bitumen for road use performance index.Quality change ± 0.1 after TFOT, ageing resistance obviously strengthens
Embodiment 7:
Modification mix asphalt preparation process following (1) is prepared modified Nano material: the aluminum sulfate aqueous solution 200ml Hybrid Heating to 105 ℃ that the magnesium sulfate solution 300ml that compound concentration is 0.02mol/L and concentration are 0.02mol/L, then add 5wt%Mg
2+and Al
3+the Aluminate of amount, stirs; The aqueous sodium carbonate 660ml that compound concentration is 0.08mol/L again, slowly drips and constantly stirs with the speed of 6000r/min, stirs after 30min, and filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In air dry oven, in 180 ℃ of oven dry, obtaining median size is the Mg-Al composite subcarbonate of 75nm.
(2) prepare compound interface properties-correcting agent: take 60 parts of sodium alkyl benzene sulfonates, take again 30 parts of nonionogenic tenside AEO-9, join 110 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 75 ℃, mixing and stirring, obtains making by oneself compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 40 parts of heat fused of petroleum pitch 80 and medium temperature coal pitch, again the compound subcarbonate of the nano magnalium of 1 part of Aluminate modification and 3 parts of self-control compound interface properties-correcting agent are added in mix asphalt, after being uniformly mixed, controlling mix asphalt modified-reaction temperature is 75 ℃, utilize under the fast rotating speed with 2000r/min of high dispersive boxshear apparatus, whip modified reaction 40min, obtains nano modification road mix asphalt.Its performance characterization result is: 45.3 ℃ of softening temperatures, and penetration degree 80mm(25 ℃, 100g), and ductility > 100cm(15 ℃), reach bitumen for road use performance index.Quality change ± 0.2 after TFOT, ageing resistance obviously strengthens.
Embodiment 8:
Modification mix asphalt preparation process following (1) is prepared modified Nano material: the solution of zinc sulfate water 500ml that compound concentration is 0.02mol/L is heated to 60 ℃, then adds 5wt ‰ Zn
2+the stearic acid of amount, stirs; The wet chemical 20ml that compound concentration is 2mol/L again, is slowly added drop-wise to above-mentioned solution and constantly stirs with the speed of 800r/min, stirs after 30min, and filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In air dry oven, in 120 ℃ of oven dry, obtain the zinc subcarbonate that median size is 45nm.
(2) prepare compound interface properties-correcting agent: take 60 parts of sodium alkyl benzene sulfonates, take again 30 parts of nonionogenic tenside AEO-9, join 100 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 75 ℃, mixing and stirring, obtains making by oneself compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 50 parts of Hybrid Heating fusings of 40 parts, petroleum pitch and medium temperature coal pitch, again 8 parts of stearic acid modified nanometer zinc subcarbonates and 15 parts of self-control compound interface properties-correcting agent are joined in the mix asphalt of melting, controlling mix asphalt modified-reaction temperature is 100 ℃, utilize under the fast rotating speed with 2500r/min of high dispersive boxshear apparatus, whip modified reaction 15min, obtains nano modification road mix asphalt.Its performance characterization result is: 46 ℃ of softening temperatures, and penetration degree 88mm(25 ℃, 100g), and ductility > 100cm(15 ℃), reach bitumen for road use performance index.Quality change ± 0.1 after TFOT, ageing resistance obviously strengthens.
Embodiment 9:
Modification mix asphalt preparation process following (1) is prepared modified Nano material: the zinc sulfate solution 500ml that compound concentration is 0.02mol/L is heated to 60 ℃, then adds 1wt ‰ Zn
2+the titanic acid ester of amount, stirs; The sodium bicarbonate aqueous solution 650ml that compound concentration is 0.04mol/L again, is slowly added drop-wise to above-mentioned solution and constantly stirs with the speed of 500r/min, stirs after 30min, and filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In air dry oven, in 120 ℃ of oven dry, obtain the zinc subcarbonate that median size is 35nm.
(2) prepare compound interface properties-correcting agent: take 40 parts of sodium alkyl benzene sulfonates, take again 20 parts of nonionogenic tenside AEO-9, join 120 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 70 ℃, mixing and stirring, obtains making by oneself compound interface properties-correcting agent.
(3) take 15 parts, petroleum pitch and 85 parts of heat fused of low temperature coal-tar pitch, again the nanometer zinc subcarbonate of 4 parts of titanic acid ester modifications and 10 parts of self-control compound interface properties-correcting agent are added in mix asphalt, after being uniformly mixed, controlling mix asphalt modified-reaction temperature is 90 ℃, utilize under the fast rotating speed with 2000r/min of high dispersive boxshear apparatus, whip modified reaction 30min, obtains nano modification road mix asphalt.Its performance characterization result is: 44.8 ℃ of softening temperatures, and penetration degree 78mm(25 ℃, 100g), and ductility > 100cm(15 ℃), reach bitumen for road use performance index.Quality change ± 0.2 after TFOT, ageing resistance obviously strengthens.
Embodiment 10:
Modification mix asphalt preparation process following (1) is prepared modified Nano material: the magnesium sulfate solution 500ml that compound concentration is 0.08mol/L is heated to 60 ℃, then adds 2wt%Mg
2+stearic acid and the titanic acid ester (mass ratio 1:1) of amount, stir; The sodium hydrogen carbonate solution 300ml that compound concentration is 0.16mol/L again and 0.16mol/L ammonium bicarbonate aqueous solution 300ml, slowly drip mixed solution and constantly stir with the speed of 7000r/min, stirs after 30min, and filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In air dry oven, in 160 ℃ of oven dry, obtain the magnesium basic carbonate that median size is 20nm.(2.4)
(2) prepare compound interface properties-correcting agent: take 45 parts of sodium alkyl benzene sulfonates, take again 20 parts of nonionogenic tenside AEO-9, join 120 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 75 ℃, mixing and stirring, obtains making by oneself compound interface properties-correcting agent.
(3) take 50 parts, petroleum pitch and 50 parts of heat fused of medium temperature coal pitch, again 6 parts of stearic acid and mixed and modified nanometer magnesium basic carbonate and the 14 parts of self-control compound interface properties-correcting agent of titanic acid ester are joined in mix asphalt, after being uniformly mixed, controlling mix asphalt modified-reaction temperature is 120 ℃, utilize under the fast rotating speed with 4000r/min of high dispersive boxshear apparatus, whip modified reaction 30min, obtains nano modification road mix asphalt.Its performance characterization result is: 45.8 ℃ of softening temperatures, and penetration degree 87mm(25 ℃, 100g), and ductility > 100cm(15 ℃), reach bitumen for road use performance index.Quality change ± 0.1 after TFOT, ageing resistance obviously strengthens.
Claims (11)
1. a modification road mix asphalt, is characterized in that modification road is composed as follows by mix asphalt mass parts:
5～90 parts, petroleum pitch
5～90 parts of coal-tar pitch
0.2～6 part of modified Nano material
1～15 part of compound interface properties-correcting agent.
2. a kind of modification as claimed in claim 1 road mix asphalt, is characterized in that described modified Nano material prepared by the following method:
(1) preparing metal salt brine solution, its volumetric molar concentration is 0.02～1.0mol/L;
(2) properties-correcting agent is added to step (1) aqueous metal salt, its add-on is the 1.5wt ‰～5wt% of metal ion weight in metal-salt, obtains mixing solutions;
Preparation alkali aqueous solution, its volumetric molar concentration is 0.04～2.0mol/L;
(4) step (3) alkali aqueous solution being added drop-wise to step (2) produces in mixing solutions, rotating speed with 500～10000r/min must precipitate at 40 ℃～105 ℃ reaction 30min～1hr, and wherein the consumption of alkali is the amount of 1～4 times mole of metal ion in step (1) aqueous metal salt;
(5) sedimentation and filtration of step (4), washing, 100～250 ℃ is dry, obtain modified Nano material.
3. a kind of modification as claimed in claim 2 road mix asphalt, is characterized in that described metal-salt is one or both of magnesium sulfate, zinc sulfate, Tai-Ace S 150.
4. a kind of modification as claimed in claim 2 road mix asphalt, is characterized in that described alkali is sodium carbonate, bicarbonate of ammonia, salt of wormwood or sodium bicarbonate.
5. a kind of modification as claimed in claim 2 road mix asphalt, it is characterized in that described properties-correcting agent be titanic acid ester, Aluminate, stearic one or more.
6. a kind of modification as claimed in claim 1 road mix asphalt, is characterized in that described modified Nano material is zinc subcarbonate, magnesium basic carbonate, the compound subcarbonate of zinc-magnesium or Mg-Al composite subcarbonate.
7. a kind of modification as claimed in claim 1 road mix asphalt, is characterized in that the particle diameter of described modified Nano material is at 3nm～90nm.
8. a kind of modification as claimed in claim 1 road mix asphalt, is characterized in that described compound interface properties-correcting agent prepared by the following method:
Take 40～60 parts of sodium alkyl benzene sulfonates, then take 20～40 parts of nonionogenic tenside AEO-9, join in 80～120 parts of solvent oils, be heated to 70～80 degree, mixing and stirring, obtains making by oneself compound interface properties-correcting agent.
9. a kind of modification as claimed in claim 8 road mix asphalt, is characterized in that described solvent oil weight ratio is fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture.
10. a kind of modification as claimed in claim 1 road mix asphalt, is characterized in that described coal-tar pitch is medium temperature coal pitch or low temperature coal-tar pitch.
The preparation method of mix asphalt for 11. a kind of modification roads as described in claim 1-10 any one, is characterized in that comprising the steps:
(1) by petroleum pitch and the fusing of coal-tar pitch Hybrid Heating, obtain mix asphalt;
(2) by modified Nano material and compound interface properties-correcting agent, join in mix asphalt, at 70 ℃～140 ℃, under the rotating speed with 1500～4000r/min, utilize high dispersive boxshear apparatus to stir rapidly 10～40min, obtain modification road mix asphalt.
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