CN103602084B - A kind of modification road mix asphalt and preparation method thereof - Google Patents
A kind of modification road mix asphalt and preparation method thereof Download PDFInfo
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Abstract
A kind of modification road mix asphalt mass parts consists of 5 ~ 90 parts, petroleum pitch, coal-tar pitch 5 ~ 90 parts, modified Nano material 0.2 ~ 6 part, compound interface properties-correcting agent 1 ~ 15 part.It is low that the present invention has cost, long service life, the advantage of excellent performance.
Description
Technical field
The invention belongs to a kind of road modified asphalt and preparation method thereof, be specifically related to a kind of modification road mix asphalt and preparation method thereof.
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, oil resistant erosion 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 problem such as resource shortage and Pavement Condition defect that road bitumen faces effectively.
Domestic and international by petroleum pitch with coal-tar pitch is used in combination has been reported and use at present, just start coal-tar pitch and the blended research as road-making material of petroleum pitch abroad as far back as the 60 to 70's of last century.Using Germany, Poland and the developed country for representative such as French by coal-tar pitch and petroleum pitch blended composite modified asphalt as motorway road-making material.Chinese patent CN101386707A only by coal-tar pitch and petroleum pitch simply mixed and modified; CN101508789A, mixes coal-tar pitch with petroleum pitch, with the addition of a certain amount of organic polymer material simultaneously; Chinese patent CN101081933A is in mixing and emulsifying pitch, with the addition of inorganic materials and inorganic nano material, gained emulsion is applied to motorway and common road crack repairing and filleting and repairs, this patent shows 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 being mixed simply by two kinds of pitches of having substantially, certain organic high molecular polymer study on the modification is in addition added while having plenty of mixing, although achieve certain success, but it is higher to there is cost, merely add the impact that organism is subject to oxygen and ultraviolet and moisture in air simultaneously, and make the ageing resistance on road surface more weak, affect the 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, modification road mix asphalt of excellent performance and preparation method thereof.
Nano material has achieved good effect because of four application of large effect in every field of its uniqueness, present invention utilizes nano material and surfactant technology and modification has been carried out 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, reach the service requirements of bitumen for road use, weathering resistance strengthens, elasticity, wear resistance, anti-heavily loaded ability also strengthens, the nano material particularly added 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, coal-tar pitch used in combination, price is low, the cost of bitumen for road use can be made obviously to reduce.Also make use of coal-tar pitch resource fully simultaneously, avoid the pollution to environment in its combustion processes, reach the object making full use of resource.
Nano-material modified road of the present invention mix asphalt mass parts is composed as follows:
5 ~ 90 parts, petroleum pitch
Coal-tar pitch 5 ~ 90 parts
Modified Nano material 0.2 ~ 6 part
Compound interface properties-correcting agent 1 ~ 15 part.
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 step (1) aqueous metal salt, its add-on is the 1.5wt ‰ ~ 5wt% of metal ion weight in metal-salt, obtains mixing solutions;
(3) prepare 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, must precipitate at 40 DEG C ~ 105 DEG C reaction 30min ~ 1hr with the rotating speed of 500 ~ 10000r/min, wherein the consumption of alkali is the amount of 1 ~ 4 times mole of metal ion in step (1) aqueous metal salt;
(5) by the sedimentation and filtration of step (4), washing, 100 ~ 250 DEG C of dryings, modified Nano material is obtained.
Described metal-salt be magnesium sulfate, zinc sulfate, Tai-Ace S 150 one or both.
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, zinc-magnesium compound subcarbonate or Mg-Al composite subcarbonate.
The particle diameter of described modified Nano material is at 3nm ~ 90nm.
Apply in the purposes Shi road coal tar pitch modification process of described modified Nano material.
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, namely obtain self-control compound interface properties-correcting agent.
Described solvent oil is 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, mix asphalt is obtained;
(2) by modified Nano material and compound interface properties-correcting agent, join in mix asphalt, at 70 DEG C ~ 140 DEG C, with under the rotating speed of 1500 ~ 4000r/min, utilize high dispersive boxshear apparatus to stir 10 ~ 40min rapidly, obtain modification road mix asphalt.
The present invention compared with prior art tool has the following advantages:
(1) due to the nano material that uses and the little and coal-tar pitch used in combination of dosage of surfactant, price is low, and the cost of bitumen for road use can be made obviously to reduce.
(2) modifying process add nano material and compound interface promoting agent, modification mix asphalt can be made to 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) prepared by this technique, and mixed and modified pitch has good weathering resistance, high temperature does not trickle, low temperature not embrittlement, 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) modified Nano material is prepared: compound concentration is that the zinc sulfate solution 500ml of 0.02mol/L is heated to 60 DEG C, then adds 1.5wt ‰ Zn
2+the Aluminate of amount, stirs; Compound concentration is that the aqueous sodium carbonate 350ml of 0.04mol/L is slowly added drop-wise to above-mentioned solution and constantly stirs with the speed of 500r/min again, and after stirring 30min, filtered while hot tap water constantly washs, to SO
4 2-till ion completely dissolve.In 120 DEG C of oven dry in air dry oven, obtain the zinc subcarbonate that median size is 35nm.
(2) compound interface properties-correcting agent is prepared: take 60 parts of sodium alkyl benzene sulfonates, take 40 parts of nonionogenic tenside AEO-9 again, join in 80 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 80 DEG C, mixing and stirring, namely obtains self-control compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 5 parts, petroleum pitch and medium temperature coal pitch 90 parts of heat fused, 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 DEG C, utilize high dispersive boxshear apparatus fast with under the rotating speed of 4000r/min, whip modified reaction 40min, obtains nano modification road mix asphalt.Its performance characterization result is: softening temperature 43.8 DEG C, penetration degree 74mm(25 DEG C, 100g), ductility > 100cm(15 DEG C), reach bitumen for road use performance index.Quality change ± 0.3 after TFOT, ageing resistance obviously strengthens.
Embodiment 2:
(1) modified Nano material is prepared: compound concentration is that the zinc sulfate solution 500ml of 0.04mol/L is heated to 80 DEG C, then adds 4wt ‰ Zn
2+the titanic acid ester of amount, stirs; Compound concentration is the wet chemical 10ml of 2mol/L again, slowly drips and constantly stirs with the speed of 10000r/min, and after stirring 30min, filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In 180 DEG C of oven dry in air dry oven, obtain the zinc subcarbonate that median size is 75nm.
(2) compound interface properties-correcting agent is prepared: take 40 parts of sodium alkyl benzene sulfonates, take 20 parts of nonionogenic tenside AEO-9 again, join in 120 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 70 DEG C, mixing and stirring, namely obtains self-control compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 10 parts, petroleum pitch and low temperature coal-tar pitch 80 parts of heat fused, 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 again add in mix asphalt, after being uniformly mixed, controlling mix asphalt modified-reaction temperature is 90 DEG C, utilize high dispersive boxshear apparatus fast with under the rotating speed of 3000r/min, whip modified reaction 40min, obtains nano modification road mix asphalt.Its performance characterization result is: softening temperature 43.2 DEG C, penetration degree 70mm(25 DEG C, 100g), ductility > 100cm(15 DEG C), 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) prepares modified Nano material: compound concentration is that the magnesium sulfate solution 500ml of 0.08mol/L is heated to 60 DEG C, then adds 1wt%Mg
2+the stearic acid of amount and titanic acid ester (mass ratio 1:1), stir; Compound concentration is the aqueous sodium carbonate 800ml of 0.08mol/L again, slowly drips and constantly stirs with the speed of 5000r/min, and after stirring 30min, filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In 250 DEG C of oven dry in air dry oven, obtain the magnesium basic carbonate that median size is 40nm, this material adds in the modified system of approach coal-tar pitch, can improve softening temperature and the penetration degree of modified coal pitch significantly, is a good properties-correcting agent.
(2) compound interface properties-correcting agent is prepared: take 40 parts of sodium alkyl benzene sulfonates, take 40 parts of nonionogenic tenside AEO-9 again, join in 120 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 70 DEG C, mixing and stirring, namely obtains self-control compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 90 parts, petroleum pitch and low temperature coal-tar pitch 5 parts of heat fused, 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 DEG C, utilize high dispersive boxshear apparatus fast with under the rotating speed of 4000r/min, whip modified reaction 10min, obtains nano modification road mix asphalt.Its performance characterization result is: softening temperature 45 DEG C, penetration degree 86mm(25 DEG C, 100g), ductility > 100cm(15 DEG C), 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) prepares modified Nano material: compound concentration be the magnesium sulfate solution 250ml Hybrid Heating of zinc sulfate solution 250ml and 0.10mol/L of 0.10mol/L to 70 DEG C, then add 8wt ‰ Mg
2+and Zn
2+the stearic acid of amount, stirs; Compound concentration is the wet chemical 700ml of 0.20mol/L again, slowly drips and constantly stirs with the speed of 4000r/min, and after stirring 30min, filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In 140 DEG C of oven dry in air dry oven, obtain the zinc-magnesium compound subcarbonate that median size is 80nm.
(2) compound interface properties-correcting agent is prepared: take 40 parts of sodium alkyl benzene sulfonates, take 30 parts of nonionogenic tenside AEO-9 again, join in 100 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 75 DEG C, mixing and stirring, namely obtains self-control compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 20 parts, petroleum pitch and low temperature coal-tar pitch 80 parts of heat fused, again 2 parts of stearic acid modified nanometer zinc-magnesium compound subcarbonates 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 DEG C, utilize high dispersive boxshear apparatus fast with under the rotating speed of 3500r/min, whip modified reaction 50min, obtains nano modification road mix asphalt.Its performance characterization result is: softening temperature 44 DEG C, penetration degree 72mm(25 DEG C, 100g), ductility > 100cm(15 DEG C), 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) prepares modified Nano material: compound concentration be the aluminum sulfate aqueous solution 250ml Hybrid Heating of magnesium sulfate solution 250ml and 0.05mol/L of 0.10mol/L to 80 DEG C, then add 4wt%Mg
2+the stearic acid of amount and Aluminate (mass ratio 1:1), stir; Compound concentration is the aqueous sodium carbonate 700ml of 0.20mol/L again, slowly drips and constantly stirs with the speed of 4000r/min, and after stirring 30min, filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In 200 DEG C of oven dry in air dry oven, obtain the Mg-Al composite subcarbonate that median size is 90nm.
(2) compound interface properties-correcting agent is prepared: take 40 parts of sodium alkyl benzene sulfonates, take 30 parts of nonionogenic tenside AEO-9 again, join in 100 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 75 DEG C, mixing and stirring, namely obtains self-control compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 20 parts, petroleum pitch and medium temperature coal pitch 80 parts of heat fused, again 4 parts of stearic acid and the composite modified nanometer zinc-magnesium compound subcarbonate of Aluminate 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 130 DEG C, utilize high dispersive boxshear apparatus fast with under the rotating speed of 2000r/min, whip modified reaction 30min, obtains nano modification road mix asphalt.Its performance characterization result is: softening temperature 43.5 DEG C, penetration degree 70mm(25 DEG C, 100g), ductility > 100cm(15 DEG C), 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) prepares modified Nano material: compound concentration is that the magnesium sulfate solution 500ml of 0.02mol/L is heated to 40 DEG C, then adds 3wt%Mg
2+the titanic acid ester of amount and stearic acid (mass ratio 1:1), stir; Join this magnesium sulfate solution, then compound concentration is the sodium bicarbonate aqueous solution 600ml of 0.04mol/L, slowly drips and constantly stir with the speed of 3000r/min, after stirring 30min, filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In 130 DEG C of oven dry in air dry oven, obtain the magnesium basic carbonate that median size is 10nm.This material adds in the modified system of approach coal-tar pitch, can improve softening temperature and the penetration degree of modified coal pitch significantly, is a good properties-correcting agent.
(2) compound interface properties-correcting agent is prepared: take 40 parts of sodium alkyl benzene sulfonates, take 20 parts of nonionogenic tenside AEO-9 again, join in 90 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 70 DEG C, mixing and stirring, namely obtains self-control compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 30 parts, petroleum pitch and low temperature coal-tar pitch 70 parts of heat fused, again 0.8 part of titanic acid ester and the composite modified nanometer magnesium basic carbonate of stearic acid 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 100 DEG C, utilize high dispersive boxshear apparatus fast with under the rotating speed of 4000r/min, whip modified reaction 20min, obtains nano modification road mix asphalt.Its performance characterization result is: softening temperature 46 DEG C, penetration degree 65mm(25 DEG C, 100g), ductility > 100cm(15 DEG C), 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) prepares modified Nano material: compound concentration to be the magnesium sulfate solution 300ml of 0.02mol/L and concentration the be aluminum sulfate aqueous solution 200ml Hybrid Heating of 0.02mol/L to 105 DEG C, then adds 5wt%Mg
2+and Al
3+the Aluminate of amount, stirs; Compound concentration is the aqueous sodium carbonate 660ml of 0.08mol/L again, slowly drips and constantly stirs with the speed of 6000r/min, and after stirring 30min, filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In 180 DEG C of oven dry in air dry oven, obtain the Mg-Al composite subcarbonate that median size is 75nm.
(2) compound interface properties-correcting agent is prepared: take 60 parts of sodium alkyl benzene sulfonates, take 30 parts of nonionogenic tenside AEO-9 again, join in 110 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 75 DEG C, mixing and stirring, namely obtains self-control compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take petroleum pitch 80 and medium temperature coal pitch 40 parts of heat fused, again the nano magnalium compound subcarbonate 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 DEG C, utilize high dispersive boxshear apparatus fast with under the rotating speed of 2000r/min, whip modified reaction 40min, obtains nano modification road mix asphalt.Its performance characterization result is: softening temperature 45.3 DEG C, penetration degree 80mm(25 DEG C, 100g), ductility > 100cm(15 DEG C), 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) prepares modified Nano material: compound concentration is that the solution of zinc sulfate water 500ml of 0.02mol/L is heated to 60 DEG C, then adds 5wt ‰ Zn
2+the stearic acid of amount, stirs; Compound concentration is the wet chemical 20ml of 2mol/L again, is slowly added drop-wise to above-mentioned solution and constantly stirs with the speed of 800r/min, and after stirring 30min, filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In 120 DEG C of oven dry in air dry oven, obtain the zinc subcarbonate that median size is 45nm.
(2) compound interface properties-correcting agent is prepared: take 60 parts of sodium alkyl benzene sulfonates, take 30 parts of nonionogenic tenside AEO-9 again, join in 100 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 75 DEG C, mixing and stirring, namely obtains self-control compound interface properties-correcting agent.
(3) preparation of modification mixing bitumen for road use: take 40 parts, petroleum pitch and medium temperature coal pitch 50 parts of Hybrid Heating fusings, 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 DEG C, utilize high dispersive boxshear apparatus fast with under the rotating speed of 2500r/min, whip modified reaction 15min, obtains nano modification road mix asphalt.Its performance characterization result is: softening temperature 46 DEG C, penetration degree 88mm(25 DEG C, 100g), ductility > 100cm(15 DEG C), 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) prepares modified Nano material: compound concentration is that the zinc sulfate solution 500ml of 0.02mol/L is heated to 60 DEG C, then adds 1wt ‰ Zn
2+the titanic acid ester of amount, stirs; Compound concentration is the sodium bicarbonate aqueous solution 650ml of 0.04mol/L again, is slowly added drop-wise to above-mentioned solution and constantly stirs with the speed of 500r/min, and after stirring 30min, filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In 120 DEG C of oven dry in air dry oven, obtain the zinc subcarbonate that median size is 35nm.
(2) compound interface properties-correcting agent is prepared: take 40 parts of sodium alkyl benzene sulfonates, take 20 parts of nonionogenic tenside AEO-9 again, join in 120 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 70 DEG C, mixing and stirring, namely obtains self-control compound interface properties-correcting agent.
(3) 15 parts, petroleum pitch and low temperature coal-tar pitch 85 parts of heat fused are taken, 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 DEG C, utilize high dispersive boxshear apparatus fast with under the rotating speed of 2000r/min, whip modified reaction 30min, obtains nano modification road mix asphalt.Its performance characterization result is: softening temperature 44.8 DEG C, penetration degree 78mm(25 DEG C, 100g), ductility > 100cm(15 DEG C), 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) prepares modified Nano material: compound concentration is that the magnesium sulfate solution 500ml of 0.08mol/L is heated to 60 DEG C, then adds 2wt%Mg
2+the stearic acid of amount and titanic acid ester (mass ratio 1:1), stir; Compound concentration is sodium hydrogen carbonate solution 300ml and the 0.16mol/L ammonium bicarbonate aqueous solution 300ml of 0.16mol/L again, is slowly dripped by mixed solution and constantly stirs with the speed of 7000r/min, and after stirring 30min, filtered while hot, constantly washs with tap water, to SO
4 2-till ion completely dissolve.In 160 DEG C of oven dry in air dry oven, obtain the magnesium basic carbonate that median size is 20nm.(2.4)
(2) compound interface properties-correcting agent is prepared: take 45 parts of sodium alkyl benzene sulfonates, take 20 parts of nonionogenic tenside AEO-9 again, join in 120 parts of solvent oils (fatty acid methyl ester: carbolineum: heavy oil=1:1:1 mixture), be heated to 75 DEG C, mixing and stirring, namely obtains self-control compound interface properties-correcting agent.
(3) 50 parts, petroleum pitch and medium temperature coal pitch 50 parts of heat fused are taken, again 6 parts of stearic acid and the mixed and modified nanometer magnesium basic carbonate of titanic acid ester and 14 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 120 DEG C, utilize high dispersive boxshear apparatus fast with under the rotating speed of 4000r/min, whip modified reaction 30min, obtains nano modification road mix asphalt.Its performance characterization result is: softening temperature 45.8 DEG C, penetration degree 87mm(25 DEG C, 100g), ductility > 100cm(15 DEG C), reach bitumen for road use performance index.Quality change ± 0.1 after TFOT, ageing resistance obviously strengthens.
Claims (8)
1. a modification road mix asphalt, is characterized in that modification road mix asphalt mass parts is composed as follows:
Described modified Nano material is zinc subcarbonate, magnesium basic carbonate, zinc-magnesium compound subcarbonate or Mg-Al composite subcarbonate;
Described compound interface properties-correcting agent 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 DEG C, mixing and stirring, namely obtain self-control compound interface properties-correcting agent; Wherein solvent oil is weight ratio is fatty acid methyl ester: carbolineum: heavy oil=1: the mixture of 1: 1.
2. a kind of modification road as claimed in claim 1 mix asphalt, is characterized in that described modified Nano material 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 step (1) aqueous metal salt, its add-on is the 1.5wt ‰ ~ 5wt% of metal ion weight in metal-salt, obtains mixing solutions;
(3) prepare 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, must precipitate at 40 DEG C ~ 105 DEG C reaction 30min ~ 1hr with the rotating speed of 500 ~ 10000r/min, wherein the consumption of alkali is the amount of 1 ~ 4 times mole of metal ion in step (1) aqueous metal salt;
(5) by the sedimentation and filtration of step (4), washing, 100 ~ 250 DEG C of dryings, modified Nano material is obtained.
3. a kind of modification road as claimed in claim 2 mix asphalt, it is characterized in that described metal-salt be magnesium sulfate, zinc sulfate, Tai-Ace S 150 one or both.
4. a kind of modification road as claimed in claim 2 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 road as claimed in claim 2 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 road as claimed in claim 1 mix asphalt, is characterized in that the particle diameter of described modified Nano material is at 3nm ~ 90nm.
7. a kind of modification road as claimed in claim 1 mix asphalt, is characterized in that described coal-tar pitch is medium temperature coal pitch or low temperature coal-tar pitch.
8. the preparation method of a kind of modification road mix asphalt as described in any one of claim 1-7, is characterized in that comprising the steps:
(1) by petroleum pitch and the fusing of coal-tar pitch Hybrid Heating, mix asphalt is obtained;
(2) by modified Nano material and compound interface properties-correcting agent, join in mix asphalt, at 70 DEG C ~ 140 DEG C, with under the rotating speed of 1500 ~ 4000r/min, utilize high dispersive boxshear apparatus to stir 10 ~ 40min rapidly, obtain modification road mix asphalt.
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