CN105219003A - A kind of response type bitumen regenerant and preparation method thereof - Google Patents
A kind of response type bitumen regenerant and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of response type bitumen regenerant and preparation method thereof, its preparation methods steps is as follows: by petroleum pitch, maleic anhydride and Di Ersi-Alder addition reaction catalyst add in reaction vessel, be warming up to 160 ~ 180 DEG C of addition reaction 8 ~ 12h, reduce system temperature to 70 ~ 80 DEG C subsequently, add base polyurethane prepolymer for use as, chainextender, continue insulation reaction 8 ~ 10h, then viscosity-depression agent fatty acid amide is added, permeate agent polyoxyethylene nonylphenol ether and antiaging agent, at 80 ~ 90 DEG C, mechanical stirring 2 ~ 4h is to mixing, namely response type bitumen regenerant is obtained.Response type bitumen regenerant viscosity provided by the invention is lower, heating is not needed in use procedure, constructability operates, good to the ductility recovery effects of aged asphalt, the performance requriements of new pitch can be reached, and can improve the usage ratio regenerating old material, prepared reclaimed asphalt mixture is better than common regenerator in anti-water damage property.
Description
Technical field
The invention belongs to engineering materials technical field, relate to a kind of response type bitumen regenerant and preparation method thereof.
Background technology
Along with the development of national economy, China's automobile pollution sustainable growth, causes public transportation load to increase rapidly.In succession there is the diseases such as distortion, rut, wearing and tearing, crackle in asphalt pavement of highway.Aging for road conditions, worsening serious road surface, to carry out maintenance and renovation extremely urgent.The method that usual employing at present is directly excluded, then overlay new bituminous pavement, the method brings the asphalt waste of enormous amount, brings detrimentally affect to ecotope.According to related data display, calculating according to the life of bituminous pavement, starting at from newly repairing, within the 5th year, have the bituminous pavement of 12% will need to overhaul, the old asphalt mixture amount of discarding reaches annual 3200000 tons, this numeral with annual 15% speed increment.Associated specialist is predicted, along with the increase year by year of mileages of transport route, discarded pavement asphalt mixture also will increase year by year, if effectively do not utilized, both waste petroleum resources non-renewable in a large number, again land occupation, contaminate environment, destruction ecology etc.
Research find, waste asphalt mixture just functionally decreases, except pitch wherein exist part aging except, sand, stone performance did not lose efficacy.Therefore, by reclaiming waste asphalt mixture, mix appropriate new pitch or regenerator and newly gather materials, heating is mixed rear can be used as completely thoroughly and is newly mixed asphalt for pavement structure.So, a large amount of sandstone materials and limited petroleum resources can be saved.Therefore, recycling pitch can save sandstone material and pitch resource, has very important strategic importance in China.
US Patent No. 5578663 discloses a kind of asphalt pavement regeneration agent and preparation method.But need in the preparation process of this regenerator to add coal tar and 20 ~ 30wt% aromatic solvent, in use there is safety problem, all have detrimentally affect to the health of environment and people.
Patent CN101475746A discloses a kind of waste asphalt reclaiming agent and preparation method thereof, primarily of waste Crumb rubber 10 ~ 40wt%, heavy traffic paving asphalt 60 ~ 90wt%, antiaging agent 0 ~ 5wt%, stablizer 0.01 ~ 10wt% and solubilizing agent 0.1 ~ 2.5wt%, evenly obtains in high-speed shearing machine dispersed with stirring at 140 ~ 190 DEG C.The program can solve the high problem of currently available products cost, but the preparation of this regenerator to be each component simply composite, and add waste Crumb rubber, can not long-time storage, poor to the ductility recovery effects of pitch.
Preparation technology's great majority of prior art medium pitch regenerator are at petroleum pitch or be rich in aromatic hydrocarbons oil content and add a certain amount of polymer modifiers, by high-speed shearing machine high speed shear, or add vegetables oil, softening agent, oxidation inhibitor, antiaging agent etc. one or more mixtures are simply composite and namely prepare bitumen regenerant.Above method is that polycomponent is simply composite, and Problems existing is: the excessive use inconvenience of viscosity of regenerator; Add polymkeric substance and be unfavorable for long-time storage, ductility recovery effects is poor; Reclaimed asphalt mixture pavement performance is poor simultaneously, and reclaimed bituminous pavement is short for work-ing life.
Summary of the invention
Technical problem to be solved by this invention is for above shortcomings in prior art, a kind of response type bitumen regenerant and preparation method thereof is provided, viscosity is lower at normal temperatures for this response type bitumen regenerant, heating is not needed to use, during use, regenerator and waste asphalt react and define space net structure, good to the recovery effects of regeneration asphalt ductility, the work-ing life of reclaimed bituminous pavement can be significantly improved, avoid the repetition and waste of resource.
For solving the problems of the technologies described above, technical scheme provided by the invention is:
A kind of response type bitumen regenerant is provided, it is prepared by following methods: by weight, by 65 ~ 75 parts of petroleum pitch, 10 ~ 15 parts of maleic anhydrides and 0.01 ~ 0.04 part of Di Ersi-Alder addition reaction catalyst add in reaction vessel, be warming up to 160 ~ 180 DEG C of addition reactions 8 ~ 12 hours, reduce system temperature to 70 ~ 80 DEG C subsequently, add 10 ~ 15 parts of base polyurethane prepolymer for use as, 0.1 ~ 0.3 part of chainextender, continue insulation reaction 8 ~ 10 hours, then 3 ~ 5 parts of viscosity-depression agent fatty acid amides are added, 0.1 ~ 0.5 part of permeate agent polyoxyethylene nonylphenol ether and 0.1 ~ 0.5 part of antiaging agent, at temperature 80 ~ 90 DEG C, stirring 2 ~ 4 is little of mixing, namely response type bitumen regenerant is obtained.
By such scheme, described petroleum pitch is one or more the mixture in the 90# pitch of penetration degree 80-180dmm (1dmm=0.1mm), 110# pitch, 130# pitch and 160# pitch.
By such scheme, described Di Ersi-Alder addition reaction catalyst is the one in aluminum chloride, zinc chloride, boron trifluoride.
By such scheme, the synthetic method of described base polyurethane prepolymer for use as is: by weight, cooling will be started after 10 ~ 15 parts of polyether glycol vacuum hydro-extractions, keep in temperature-fall period vacuumizing state, add 3 ~ 5 parts of '-diphenylmethane diisocyanate (MDI) insulation reaction 2 ~ 4h when system temperature is down to 70 ~ 80 DEG C and obtain.
By such scheme, described vacuum hydro-extraction is dehydration reaction 2h under temperature 110 ~ 120 DEG C, vacuum tightness-0.08 ~-0.1MPa condition.
By such scheme, described polyether glycol is polyoxypropylene polyol, and number-average molecular weight is 1000-3000; Described '-diphenylmethane diisocyanate is one or more the mixture in MDI-50, MDI-80, MDI-100.
By such scheme, described viscosity-depression agent fatty acid amide is one or more the mixture in lauric amide, amine hydroxybenzene, palmitic amide, stearic amide.
By such scheme, described permeate agent polyoxyethylene nonylphenol ether is one or more the mixture in TX-3, TX-4, TX-6, TX-7, TX-10.
By such scheme, described antiaging agent is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, tricresyl phosphite (2,4-DTBP) ester, triphenyl, one or more mixture in the different certain herbaceous plants with big flowers ester of diphosphorous acid tetramethylolmethane two.
By such scheme, described chainextender is one or more the mixture in BDO, glycol ether, 1,2-PD.
Preparation method's step of response type bitumen regenerant of the present invention is as follows: by weight, by 65 ~ 75 parts of petroleum pitch, 10 ~ 15 parts of maleic anhydrides and 0.01 ~ 0.04 part of Di Ersi-Alder addition reaction catalyst add in reaction vessel, be warming up to 160 ~ 180 DEG C of addition reactions 8 ~ 12 hours, reduce system temperature to 70 ~ 80 DEG C subsequently, add 10 ~ 15 parts of base polyurethane prepolymer for use as, 0.1 ~ 0.3 part of chainextender, continue insulation reaction 8 ~ 10 hours, then 3 ~ 5 parts of viscosity-depression agent fatty acid amides are added, 0.1 ~ 0.5 part of permeate agent polyoxyethylene nonylphenol ether and 0.1 ~ 0.5 part of antiaging agent, at temperature 80 ~ 90 DEG C, mechanical stirring 2 ~ 4 is little of mixing, namely response type bitumen regenerant is obtained.
The using method step of response type bitumen regenerant of the present invention is as follows: by aging bituminous pavement milling, obtain waste asphalt mixture, its bitumen aggregate ratio and grating are surveyed in extracting, determine the consumption adding grating and the new pitch newly gathered materials, put in mix pot after waste asphalt mixture after fragmentation is heated 2 ~ 3 hours at temperature 140 ~ 180 DEG C, add described response type bitumen regenerant, add and mix mix 90s in pot, add and newly gather materials, or newly gather materials and continue mix 15s and make reclaimed asphalt mixture after new pitch, wherein the volume of response type bitumen regenerant is 3 ~ 5wt% of waste asphalt quality.
The present invention is reacted by the adduct of petroleum pitch and maleic anhydride and urethane resin and carries out chemical modification, form external phase, make regenerator energy stably stored, and viscosity is lower at normal temperatures to add the response type bitumen regenerant that a certain amount of viscosity-depression agent makes to obtain, and does not need heating in use procedure.Join in waste asphalt by this response type bitumen regenerant, urethane resin and waste asphalt react and define space net structure, good to the regeneration effect of waste asphalt ductility.
Beneficial effect of the present invention is: compared with commercially available regenerator, response type bitumen regenerant viscosity provided by the invention is lower, be conducive to regenerator infiltration, be specially adapted to in-situ heat regeneration, constructability operates, and can improve the usage ratio (increasing the usage quantity of 20 ~ 30wt%) of waste asphalt mixture compared with common regenerator, use cost is low.In addition, this response type bitumen regenerant adopts urethane resin modification, good to the ductility recovery effects of aged asphalt, the performance requriements of new pitch can be reached, preparation-obtained reclaimed asphalt mixture is better than the pavement performance of new hot-mix asphalt mixture at pavement performance (as low-temperature cracking-resistance and anti-water damage property), extends the work-ing life of reclaimed bituminous pavement.
Embodiment
For making those skilled in the art understand technical scheme of the present invention better, below in conjunction with embodiment, the present invention is described in further detail.
The present invention's lot of experiments proving effect in laboratory is good.
The present embodiment petroleum asphalt penetration used is 80-180dmm.
Embodiment 1
The preparation of base polyurethane prepolymer for use as: (take propylene glycol as initiator by 10 parts of polyoxypropylene polyols, potassium hydroxide is catalyzer, molecular weight is 2000, hydroxyl value is 56mgKOH/g, water content is 0.06wt%), cooling is started after vacuum hydro-extraction reaction 2h under temperature 110 ~ 120 DEG C, vacuum tightness-0.08 ~-0.1MPa condition, keep in temperature-fall period vacuumizing state, when system temperature is down to 70 ~ 80 DEG C, continue to add 3.22 parts of MDI-50 in reaction vessel, reaction 2 ~ 4h, namely stopped reaction obtains base polyurethane prepolymer for use as.
By 70 parts of 160# petroleum pitch, 12 parts of maleic anhydrides and 0.01 part of aluminum chloride add in the there-necked flask with agitator arm and thermometer, be warming up to 160 DEG C of addition reactions 12 hours, reduce system temperature to 80 DEG C subsequently, add the base polyurethane prepolymer for use as of 13 parts of above-mentioned preparations, 0.1 part of chainextender 1, 4-butyleneglycol, continue insulation reaction 8 hours, then 4.3 parts of viscosity-depression agent lauric amides are added, 0.1 part of permeate agent polyoxyethylene nonylphenol ether TX-3 and 0.5 part antiaging agent four [β-(3, 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, at 90 DEG C, mechanical stirring 3 is little of mixing, namely response type bitumen regenerant is obtained.
Embodiment 2
The preparation of base polyurethane prepolymer for use as: (take propylene glycol as initiator by 12 parts of polyoxypropylene polyols, take methylcarbonate as catalyzer, molecular weight is 3000, hydroxyl value is 38mgKOH/g, water content is 0.05wt%), cooling is started after dehydration reaction 2h under temperature 110 ~ 120 DEG C, vacuum tightness-0.08 ~-0.1MPa condition, keep in temperature-fall period vacuumizing state, when system temperature is down to 70 ~ 80 DEG C, continue to add 4.69 parts of MDI-100 in reaction vessel, reaction 2 ~ 4h, namely stopped reaction obtains base polyurethane prepolymer for use as.
By 45 parts of 110# petroleum pitch, 21 parts of 90# petroleum pitch, 15 parts of maleic anhydrides and 0.02 part of zinc chloride add in the there-necked flask with agitator arm and thermometer, be warming up to 170 DEG C of addition reactions 10 hours, reduce the temperature to 70 DEG C of system subsequently, add-NCO blocked polyurethane the performed polymer of 15 parts of above-mentioned preparations, 0.2 part of chainextender 1, 2-propylene glycol, continue insulation reaction 8 hours, then 3.3 parts of viscosity-depression agent amine hydroxybenzenes are added, permeate agent polyoxyethylene nonylphenol ether 0.1 part of TX-4, 0.1 part of TX-6 and 0.3 part of antiaging agent triphenyl, at 80 DEG C, mechanical stirring 4 is little of mixing, namely response type bitumen regenerant is obtained.
Embodiment 3
The preparation of base polyurethane prepolymer for use as: (take propylene glycol as initiator by 15 parts of polyoxypropylene polyols, potassium hydroxide is catalyzer, molecular weight is 1000, hydroxyl value is 112mgKOH/g, water content is 0.03wt%), cooling is started after dehydration reaction 2h under temperature 110 ~ 120 DEG C, vacuum tightness-0.08 ~-0.1MPa condition, keep in temperature-fall period vacuumizing state, when system temperature is down to 70 ~ 80 DEG C, continue to add 3 parts of MDI-100 and 1 part MDI-50 in reaction vessel, reaction 2 ~ 4h, namely stopped reaction obtains base polyurethane prepolymer for use as.
By 74.3 parts of 130# petroleum pitch, 10 parts of maleic anhydrides and 0.04 part of boron trifluoride add in the there-necked flask with agitator arm and thermometer, be warming up to 180 DEG C of addition reactions 8 hours, reduce system temperature to 80 DEG C subsequently, add the base polyurethane prepolymer for use as of 10 parts of above-mentioned preparations, 0.1 part of chainextender glycol ether, continue insulation reaction 8 hours, then 5 parts of viscosity-depression agent stearic amides are added, permeate agent polyoxyethylene nonylphenol ether 0.3 part of TX-7, 0.2 part TX-10 and the 0.1 part different certain herbaceous plants with big flowers ester of antiaging agent diphosphorous acid tetramethylolmethane two, at 100 DEG C, mechanical stirring 2 is little of mixing, namely response type bitumen regenerant is obtained.
Embodiment 4
The preparation of regeneration asphalt and performance measurement thereof
The preparation of regeneration asphalt: response type bitumen regenerant 5g prepared by Example 1-3, adds the aged asphalt 100g of extracting and reclaiming from milling material, stirs 10min, obtain regeneration asphalt at temperature 150 DEG C.Test aged asphalt, with the addition of the performance of the regeneration asphalt of response type bitumen regenerant, with the addition of commercially available common regenerator regeneration asphalt (comparative example) performance compare, result is as shown in table 1:
The performance of table 1 aged asphalt, regeneration asphalt
More than test is undertaken by " highway engineering pitch and Asphalt Mixture Experiment code " (JTGE20-2011), result shows, the three large performance index that response type bitumen regenerant prepared by the embodiment of the present invention adds gained regeneration asphalt in the aged asphalt of recovery to meet the service requirements of modifying asphalt, illustrate that this response type bitumen regenerant has good regeneration effect, aged asphalt can be made to revert to new pitch, and regeneration effect is better than commercially available bitumen regenerant.
Embodiment 5
The preparation and property of reclaimed asphalt mixture measures
The preparation of reclaimed asphalt mixture: will the aged asphalt road-surface milling repaired be needed, obtain waste asphalt mixture, its bitumen aggregate ratio and grating are surveyed in extracting, determine the consumption adding grating and the new pitch (the SBS modifying asphalt provided with Korea S SK is new pitch) newly gathered materials, put in mix pot after waste asphalt mixture after fragmentation is heated 2 ~ 3 hours at temperature 140 ~ 180 DEG C, add response type bitumen regenerant (embodiment 1-3 preparation) and commercially available plain asphalt reclaiming agent (comparative example) respectively, add and mix mix 90s in pot, add and newly gather materials and continue mix 15s after new pitch, mix makes reclaimed asphalt mixture.The quality of newly gathering materials and the mass ratio of waste asphalt mixture are determined according to aged asphalt performance in waste asphalt mixture, and the volume of bitumen regenerant is 3 ~ 5wt% of waste asphalt quality.It is example that the level of asphalt is equipped with AC-13.The regenerator preparation reclaimed asphalt mixture adopting embodiment 1-3 to prepare, prepare gained reclaimed asphalt mixture with the commercially available bitumen regenerant of employing and adopt new pitch SBS modifying asphalt (Korea S SK provides) to prepare new hot-mix asphalt mixture completely, contrast its performance, its test-results is shown in Table 2:
The pavement performance of the new asphalt of table 2, reclaimed asphalt mixture
Above-mentioned test event is carried out according to " highway engineering pitch and Asphalt Mixture Experiment code " (JTGE20-2011), and performance index are according to " standard specification for construction and acceptance of highway asphalt pavement " JTGF40-2004 requirement.
Test-results shows, the recycling asphalt mixtures performance that the compounds such as the response type bitumen regenerant prepared by the embodiment of the present invention and waste asphalt mixture obtain meets " standard specification for construction and acceptance of highway asphalt pavement " JTGF40-2004 requirement completely, its pavement performance (as low-temperature cracking-resistance and anti-water damage property) is better than adopting commercially available bitumen regenerant to prepare gained reclaimed asphalt mixture, even exceedes new hot-mix asphalt mixture.Add response type bitumen regenerant prepared by the present invention, also can improve the usage ratio of waste asphalt mixture, the usage quantity of 20 ~ 30wt% can be increased compared to common commercially available regenerator, there is good environmental benefit and economic benefit.
Claims (10)
1. a response type bitumen regenerant, it is characterized in that, it is prepared by following methods: by weight, by 65 ~ 75 parts of petroleum pitch, 10 ~ 15 parts of maleic anhydrides and 0.01 ~ 0.04 part of Di Ersi-Alder addition reaction catalyst add in reaction vessel, be warming up to 160 ~ 180 DEG C of addition reactions 8 ~ 12 hours, reduce system temperature to 70 ~ 80 DEG C subsequently, add 10 ~ 15 parts of base polyurethane prepolymer for use as, 0.1 ~ 0.3 part of chainextender, continue insulation reaction 8 ~ 10 hours, then 3 ~ 5 parts of viscosity-depression agent fatty acid amides are added, 0.1 ~ 0.5 part of permeate agent polyoxyethylene nonylphenol ether and 0.1 ~ 0.5 part of antiaging agent, at temperature 80 ~ 90 DEG C, stirring 2 ~ 4 is little of mixing, namely response type bitumen regenerant is obtained.
2. response type bitumen regenerant according to claim 1, is characterized in that described petroleum pitch is one or more the mixture in the 90# pitch of penetration degree 80-180dmm, 110# pitch, 130# pitch and 160# pitch.
3. response type bitumen regenerant according to claim 1, is characterized in that described Di Ersi-Alder addition reaction catalyst is the one in aluminum chloride, zinc chloride, boron trifluoride.
4. response type bitumen regenerant according to claim 1, it is characterized in that the synthetic method of described base polyurethane prepolymer for use as is: by weight, cooling will be started after 10 ~ 15 parts of polyether glycol vacuum hydro-extractions, keep in temperature-fall period vacuumizing state, add 3 ~ 5 parts of '-diphenylmethane diisocyanate insulation reaction 2 ~ 4h when system temperature is down to 70 ~ 80 DEG C and obtain.
5. response type bitumen regenerant according to claim 4, it is characterized in that described polyether glycol is polyoxypropylene polyol, number-average molecular weight is 1000-3000; Described '-diphenylmethane diisocyanate is one or more the mixture in MDI-50, MDI-80, MDI-100.
6. response type bitumen regenerant according to claim 1, is characterized in that described viscosity-depression agent fatty acid amide is one or more the mixture in lauric amide, amine hydroxybenzene, palmitic amide, stearic amide.
7. response type bitumen regenerant according to claim 1, is characterized in that described permeate agent polyoxyethylene nonylphenol ether is one or more the mixture in TX-3, TX-4, TX-6, TX-7, TX-10.
8. response type bitumen regenerant according to claim 1, it is characterized in that described antiaging agent is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, tricresyl phosphite (2,4-DTBP) ester, triphenyl, one or more mixture in the different certain herbaceous plants with big flowers ester of diphosphorous acid tetramethylolmethane two; Described chainextender is one or more the mixture in BDO, glycol ether, 1,2-PD.
9. the preparation method of the arbitrary described response type bitumen regenerant of claim 1-8, it is characterized in that step is as follows: by weight, by 65 ~ 75 parts of petroleum pitch, 10 ~ 15 parts of maleic anhydrides and 0.01 ~ 0.04 part of Di Ersi-Alder addition reaction catalyst add in reaction vessel, be warming up to 160 ~ 180 DEG C of addition reactions 8 ~ 12 hours, reduce system temperature to 70 ~ 80 DEG C subsequently, add 10 ~ 15 parts of base polyurethane prepolymer for use as, 0.1 ~ 0.3 part of chainextender, continue insulation reaction 8 ~ 10 hours, then 3 ~ 5 parts of viscosity-depression agent fatty acid amides are added, 0.1 ~ 0.5 part of permeate agent polyoxyethylene nonylphenol ether and 0.1 ~ 0.5 part of antiaging agent, at temperature 80 ~ 90 DEG C, stirring 2 ~ 4 is little of mixing, namely response type bitumen regenerant is obtained.
10. the using method of the arbitrary described response type bitumen regenerant of claim 1-8, it is characterized in that step is as follows: by aging bituminous pavement milling, obtain waste asphalt mixture, its bitumen aggregate ratio and grating are surveyed in extracting, determine the consumption adding grating and the new pitch newly gathered materials, put in mix pot after waste asphalt mixture after fragmentation is heated 2 ~ 3 hours at temperature 140 ~ 180 DEG C, add described response type bitumen regenerant, add and mix mix 90s in pot, add and newly gather materials, or newly gather materials and continue mix 15s and make reclaimed asphalt mixture after new pitch, wherein the volume of response type bitumen regenerant is 3 ~ 5wt% of waste asphalt quality.
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