CN102617070A - Polyurethane asphalt concrete as well as preparation method and application thereof - Google Patents
Polyurethane asphalt concrete as well as preparation method and application thereof Download PDFInfo
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- CN102617070A CN102617070A CN2012100802215A CN201210080221A CN102617070A CN 102617070 A CN102617070 A CN 102617070A CN 2012100802215 A CN2012100802215 A CN 2012100802215A CN 201210080221 A CN201210080221 A CN 201210080221A CN 102617070 A CN102617070 A CN 102617070A
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Abstract
The invention discloses polyurethane asphalt concrete prepared from aggregate, diluted asphalt and polyurethane prepolymer which serve as raw materials, wherein the aggregate is basalt, diabase or limestone; the diluted asphalt is a mixture formed by diluting road petroleum asphalt and gasoline or diesel at a weight ratio of 100:(18-100); and the polyurethane prepolymer is prepared by reacting isocyanate with a polyalcohol compound, a catalyst and a plasticizer. The polyurethane asphalt concrete serving as cool-mixed and cool-spread type asphalt concrete is applied to pavement or repair of an asphalt road surface; compared with the conventional hot state technology for a hot-mixed and hot-repaired asphalt mixture, the polyurethane asphalt concrete has the advantages that the energy is saved, emission of a large amount of greenhouse gas and emission of toxic and harmful gas during asphalt heating are reduced, the surrounding environment is protected, and the environment pollution is reduced; and furthermore, the polyurethane asphalt concrete is operated easily and high in efficiency and cannot be limited by a transparent condition, a repair dispersion condition and the like during production and construction.
Description
Technical field
The present invention relates to a kind of bituminous concrete, be specifically related to a kind of polyurethane asphalt concrete.
Background technology
In recent decades,, bituminous material is had higher requirement, impel its research work further to carry out in a deep going way along with improving constantly of road quality classification.Various modifying asphalts have appearred; As in pitch, mixing rubber, resin, sulphur and other superpolymer; Improve the pavement performance of bituminous concrete; But traditional asphalt all is a heat mixes thermopave, promptly adopts asphalt cement as binder, need pitch and mineral aggregate be constructed at hot mix down, hot making down.Obviously the energy consumption that needs is high, and is big to the influence of environment, and corresponding material cost has also increased.Therefore, many investigators are devoted to seek and can substitute the method that heat is mixed production.Under this target, cold mixing cold laid asphaltic compound arises at the historic moment.
But the moulding product of wide popularization and application all is solvent-borne type cold-mix asphalt compounds on the market in recent years, and the application of the cold-mix asphalt compound of response type still belongs to blank on the market at home and abroad at present.Though traditional cold-mix asphalt compound can be realized mixing and stirring construction under the normal temperature to a certain extent; Reduce energy consumption; But relative hot mix asphalt material; The volatilization of its solvent causes environmental pollution, pavement performance poor, and the shortcoming of poor durability also manifests gradually, can't satisfy now the requirement to bituminous material.
Summary of the invention
The object of the present invention is to provide the polyurethane asphalt concrete of a kind of pavement performance excellence, cold mixing cold-application.
Another object of the present invention is to provide above-mentioned polyurethane asphalt concrete preparation method.
Another purpose of the present invention be to provide above-mentioned polyurethane asphalt concrete bituminous pavement pave or repair in application.
The object of the invention realizes through following technical measures:
A kind of polyurethane asphalt concrete is characterized in that: it by gather materials, fluxed asphalt and base polyurethane prepolymer for use as be that raw material makes; Said gathering materials is Irish touchstone, diabase or ls; To be bi tumenf orr oad and gasoline or diesel oil count 100: 18～mixture after 100 the dilution proportion with weight ratio to said fluxed asphalt, and said base polyurethane prepolymer for use as is to be that raw material reaction makes with isocyanic ester and polyol compound, catalyzer, softening agent.
In order further to improve the concrete pavement performance of polyurethane asphalt of the present invention; Above-mentioned gathering materials is divided into coarse aggregate and fine aggregate; Described coarse aggregate is Irish touchstone, diabase or ls, and nominal particle diameter is 4.75 millimeters＜Φ≤9.5 millimeter, and described fine aggregate is Irish touchstone, diabase or ls; Nominal particle diameter is Φ＜4.75 millimeter, is respectively by weight percentage: fine aggregate accounts for 30%～50%, coarse aggregate accounts for 50～70%.Clear and definite in the nominal particle diameter art technology handbook for thick, fine aggregate, be the boundary with 4.75mm, be gathering materials of 4.75mm but all there is not nominal particle diameter.
In order further to improve polyurethane asphalt concrete pavement performance of the present invention and weather resistance, above-mentionedly gather materials, fluxed asphalt and base polyurethane prepolymer for use as be by weight being respectively 100: 3～8: 0.2～4.
Specifically, in the preparation raw material of above-mentioned base polyurethane prepolymer for use as, the composition of each component is respectively by weight percentage:
Said isocyanic ester is tolylene diisocyanate (TDI), poly methylene poly phenyl poly isocyanate or hexamethylene diisocyanate; Said polyol compound is polyoxyethylene glycol, polyether glycol or polyester polyol; Said polyester polyol preferably adopts commercially available benzoic anhydride polyester polyol CZP-400, polyester polyol HT218 or polyester polyol PS-3152 etc., and said polyether glycol preferably adopts commercially available polyether glycol 1618, polyether glycol HSH206 or polyether glycol 4110 etc.; Described catalyzer is dibutyl tin dilaurate (DBDTL) or triethylenediamine; Described softening agent is DOP (DOP) or Witcizer 300 (DBP).
More preferably, above-mentioned base polyurethane prepolymer for use as follows these steps to make:
By above-mentioned weight proportion above-mentioned polyol compound is added reaction kettle; 100～120 ℃ of temperature in the kettle, vacuumize the dehydration 2～3h after, be cooled to 60～70 ℃; Add above-mentioned isocyanic ester, catalyzer, softening agent more in proportion; Under the nitrogen protection condition, react 4h down at 80～90 ℃ and be cooled to about 60 ℃, promptly get base polyurethane prepolymer for use as.
More particularly, a kind of polyurethane asphalt concrete is characterized in that: it by gather materials, fluxed asphalt and base polyurethane prepolymer for use as be that raw material makes; Said gathering materials is made up of with the coarse aggregate that accounts for 60% fine aggregate that accounts for 40%; By weight percentage; Wherein coarse aggregate is Irish touchstone, diabase or ls; Nominal particle diameter is 4.75 millimeters＜Φ≤9.5 millimeter, and fine aggregate is Irish touchstone, diabase or ls, and nominal particle diameter is Φ＜4.75 millimeter; Said fluxed asphalt is 70# bi tumenf orr oad and gasoline or the diesel oil mixture after with the dilution proportion of weight ratio 100: 37～55; Said base polyurethane prepolymer for use as is to be that raw material reaction makes with isocyanic ester and polyol compound, catalyzer, softening agent; Wherein isocyanic ester accounts for 26%, polyol compound accounts for 55%, catalyzer accounts for 1.5%, softening agent accounts for 17.5%, and by weight percentage, said isocyanic ester is 1; Hexamethylene-diisocyanate; Said polyol compound is a polyoxyethylene glycol, and described catalyzer is or triethylenediamine that described softening agent is Witcizer 300 (DBP); Saidly gather materials, fluxed asphalt and base polyurethane prepolymer for use as be by weight being respectively 100: 4.5: 2.
The concrete preparation method of above-mentioned polyurethane asphalt is characterized in that, as follows:
1) preparation of base polyurethane prepolymer for use as
By above-mentioned weight proportion above-mentioned polyol compound is added reaction kettle; 100～120 ℃ of temperature in the kettle, vacuumize the dehydration 2～3h after, be cooled to 60～70 ℃; Add above-mentioned isocyanic ester, catalyzer, softening agent more in proportion; Under the nitrogen protection condition, 80～90 ℃ down reaction 4h be cooled to about 60 ℃, base polyurethane prepolymer for use as;
2) the concrete preparation of polyurethane asphalt
Above-mentioned fluxed asphalt is mixed with above-mentioned base polyurethane prepolymer for use as according to the above ratio, and stirring makes polyurethane asphalt; Above-mentioned gathering materials stirred in container, in container, add the said polyurethane asphalt that makes then in proportion, mix is even under the normal temperature, and vacuum packaging promptly gets high performance polyurethane bituminous concrete of the present invention.
Above-mentioned polyurethane asphalt concrete bituminous pavement pave or repair in application.
Above-mentioned application, specifically the packaged polyurethane asphalt concrete of the above-mentioned preparation scene that is transported to is directly paved or repair the tunnel, maintenance got final product open to traffic in 1～3 day.
The present invention has following beneficial effect:
1, polyurethane asphalt concrete of the present invention; As cold mixing cold-application formula bituminous concrete; Be applied to bituminous pavement paving or repairing, mix the hot technology of vulcanizing asphalt, not only save energy with respect to traditional heat; And reduced the discharging of toxic and harmful in a large amount of greenhouse gases and the pitch heat-processed, protect peripheral environment, reduced environmental pollution; And its produce and construction in easy and simple to handle, efficient is high, is not transported, repairs the restriction of condition such as dispersion.
2, adopt polyurethane asphalt concrete speading of the present invention, Reparation of Bituminous Pavement; With low cost, its pavement performance excellence; (and 60 ℃ of Marshall stabilitys of conventional bituminous concrete feed supplement are 3.5～4.5KN), excellent in durability, 600 μ ε strain four-point bending girder fatigue lifetime＞1000000 (N can to reach 50～70KN like 60 ℃ of Marshall stabilitys
f); Adopt the concrete curing time of polyurethane asphalt to lack, be 1～3 day simultaneously; And curing temperature can tolerate 0～10 ℃ low temperature but need maintenance about 3 days; The summer high temperature maintenance effect is better only to need maintenance to get final product quick open to traffic in 1 day, has bigger application prospect.Polyurethane asphalt concrete of the present invention is a kind of material of response type; Under external environment consolidation reaction taking place, make compound form intensity, not only has the advantage of traditional cold-mixed asphaltic concrete; And its pavement performance is excellent; Reduce environmental pollution, and prolonged greatly the road surface work-ing life, in the application of cold-mixed asphaltic concrete, opened up new research field.
Embodiment
Through instance the present invention is specifically described below.Be necessary to be pointed out that at this; Following instance only is used for the present invention is further specified; Can not be interpreted as the restriction to protection domain of the present invention, the person skilled in the art in this field can make some nonessential improvement and adjustment to the present invention according to the foregoing invention content.
Embodiment 1
A kind of polyurethane asphalt concrete makes as follows:
90kg polyether Glycols (molecular weight 1000) is added reaction kettle, 100～120 ℃ of temperature in the kettle, vacuumize dehydration 2～3h after; Be cooled to 60～70 ℃, add the 18kg poly methylene poly phenyl poly isocyanate, 0.24kg dibutyl tin dilaurate (DBDTL); 12kg o-phthalic acid dibutyl ester (DOP); Under the nitrogen protection condition, react 4h down at 80～90 ℃ and be cooled to about 60 ℃, make base polyurethane prepolymer for use as.
After 60kg bi tumenf orr oad (70#) is heated to fusing, mix, stir, make fluxed asphalt with 60kg gasoline.
Choose 1.6t Irish touchstone fine aggregate, 2.4t Irish touchstone coarse aggregate (the coarse aggregate nominal particle diameter is 4.75 millimeters＜Φ≤9.5 millimeter, and the fine aggregate nominal particle diameter is Φ＜4.75 millimeter), subsequent use.The fluxed asphalt that makes is mixed with base polyurethane prepolymer for use as, and stirring makes polyurethane asphalt; Coarse aggregate and fine aggregate are stirred in container, in container, add prepared polyurethane asphalt then, mix is even at normal temperatures, obtains high performance polyurethane bituminous concrete 1#.
Embodiment 2
A kind of polyurethane asphalt concrete makes as follows:
72kg polyoxyethylene glycol (molecular weight 400) is added reaction kettle, 100～120 ℃ of temperature in the kettle, vacuumize dehydration 2～3h after; Be cooled to 60～70 ℃, add 36kg tolylene diisocyanate (TDI), the 0.4kg triethylenediamine; 12kg dibutyl phthalate (DBP) (DBP); Under the nitrogen protection condition, react 4h down at 80～90 ℃ and be cooled to about 60 ℃, make base polyurethane prepolymer for use as.
After 60kg bi tumenf orr oad (70#) is heated to fusing, mix, stir, make fluxed asphalt with 60kg diesel oil.
Next according to the method identical, make high performance polyurethane bituminous concrete 2# with embodiment 1.
Embodiment 3
A kind of polyurethane asphalt concrete makes as follows:
88kg polyether Glycols (molecular weight 1000) is added reaction kettle, 100～120 ℃ of temperature in the kettle, vacuumize dehydration 2～3h after; Be cooled to 60～70 ℃, add the 20kg hexamethylene diisocyanate; 0.48kg dibutyl tin dilaurate (DBDTL), 12kg o-phthalic acid dibutyl ester (DOP) is under the nitrogen protection condition; React 4h down at 80～90 ℃ and be cooled to about 60 ℃, make base polyurethane prepolymer for use as.
After 60kg bi tumenf orr oad (70#) is heated to fusing, mix, stir, make fluxed asphalt with 60kg gasoline.
Next according to the method identical, make high performance polyurethane bituminous concrete 3# with embodiment 1.
With polyurethane asphalt concrete of the present invention according to standard " highway engineering pitch and asphalt testing regulation (JTJ E20-2011) " shaping test piece, health and test.
The polyurethane asphalt concrete is pressed the test result of JTJE20-2011
Can find out from the test result of above three embodiment; The high performance polyurethane bituminous concrete stability property prepared by the present invention is good, freeze thawing cleavage strength height has the pavement performance excellent characteristics; Endurance quality is excellent simultaneously, has improved the inferior position of traditional cold mixing cold laid asphaltic concrete pavement performance difference, and has had the advantage of cold-mixed asphaltic concrete concurrently; Lower cost has great application value in actual engineering.
Embodiment 4～9
A kind of polyurethane asphalt concrete, the raw material and the proportioning thereof of according to the form below make, and all the other are with embodiment 1.
The polyurethane asphalt concrete that the foregoing description makes is tested through JTJ E20-2011; 60 ℃ of Marshall stabilitys (KN) are 58～65; Immersion Marshall residual stability is 91～95%; 60 ℃ of dynamic stabilities (mm/ time) are 10500～21000, and freeze thawing cleavage strength ratio is at 90%～93%, 600 μ ε strain four-point bending girder (N fatigue lifetime
f)＞1000000; This polyurethane asphalt concrete pavement performance and endurance quality are excellent, and have the advantage of cold-mixed asphaltic concrete concurrently.
Claims (8)
1. polyurethane asphalt concrete is characterized in that: it by gather materials, fluxed asphalt and base polyurethane prepolymer for use as be that raw material makes; Said gathering materials is Irish touchstone, diabase or ls; Said fluxed asphalt is bi tumenf orr oad and gasoline or the diesel oil mixture after with the dilution proportion of weight ratio 100:18 ~ 100, and said base polyurethane prepolymer for use as is to be that raw material reaction makes with isocyanic ester and polyol compound, catalyzer, softening agent.
2. polyurethane asphalt concrete as claimed in claim 1; It is characterized in that: said gathering materials is divided into coarse aggregate and fine aggregate; Described coarse aggregate is Irish touchstone, diabase or ls, and nominal particle diameter is 4.75 millimeters＜Φ≤9.5 millimeter, and described fine aggregate is Irish touchstone, diabase or ls; Nominal particle diameter is Φ＜4.75 millimeter, is respectively by weight percentage: fine aggregate accounts for 30% ~ 50%, coarse aggregate accounts for 50 ~ 70%.
3. according to claim 1 or claim 2 polyurethane asphalt concrete is characterized in that: saidly gather materials, fluxed asphalt and base polyurethane prepolymer for use as be by weight being respectively 100:3 ~ 8:0.2 ~ 4.
4. like claim 1,2 or 3 described polyurethane asphalt concrete, it is characterized in that: in the preparation raw material of said base polyurethane prepolymer for use as, the composition of each component is respectively by weight percentage:
Isocyanic ester 10 ~ 30%
Polyol compound 47 ~ 80%
Catalyzer 0.1 ~ 3%
Softening agent 1 ~ 20%;
Said isocyanic ester is tolylene diisocyanate (TDI), poly methylene poly phenyl poly isocyanate or hexamethylene diisocyanate; Said polyol compound is polyoxyethylene glycol, polyether glycol or polyester polyol; Described catalyzer is dibutyl tin dilaurate (DBDTL) or triethylenediamine; Described softening agent is DOP (DOP) or Witcizer 300 (DBP).
5. polyurethane asphalt concrete as claimed in claim 4 is characterized in that: said base polyurethane prepolymer for use as follows these steps to make:
By said weight proportion said polyol compound is added reaction kettle; 100 ~ 120 ℃ of temperature in the kettle, vacuumize the dehydration 2 ~ 3h after, be cooled to 60 ~ 70 ℃; Add described isocyanic ester, catalyzer, softening agent more in proportion; Under the nitrogen protection condition, react 4h down at 80 ~ 90 ℃ and be cooled to about 60 ℃, promptly get base polyurethane prepolymer for use as.
6. polyurethane asphalt concrete as claimed in claim 1 is characterized in that: it by gather materials, fluxed asphalt and base polyurethane prepolymer for use as be that raw material makes; Said gathering materials is made up of with the coarse aggregate that accounts for 60% fine aggregate that accounts for 40%; By weight percentage; Wherein coarse aggregate is Irish touchstone, diabase or ls; Nominal particle diameter is 4.75 millimeters＜Φ≤9.5 millimeter, and fine aggregate is Irish touchstone, diabase or ls, and nominal particle diameter is Φ＜4.75 millimeter; Said fluxed asphalt is 70# bi tumenf orr oad and gasoline or the diesel oil mixture after with the dilution proportion of weight ratio 100:37～55; Said base polyurethane prepolymer for use as is to be that raw material reaction makes with isocyanic ester and polyol compound, catalyzer, softening agent; Wherein isocyanic ester accounts for 26%, polyol compound accounts for 55%, catalyzer accounts for 1.5%, softening agent accounts for 17.5%, and by weight percentage, said isocyanic ester is 1; Hexamethylene-diisocyanate; Said polyol compound is a polyoxyethylene glycol, and described catalyzer is or triethylenediamine that described softening agent is Witcizer 300 (DBP); Saidly gather materials, fluxed asphalt and base polyurethane prepolymer for use as be by weight being respectively 100:4.5:2.
7. like the concrete preparation method of each said polyurethane asphalt of claim 1～6, it is characterized in that, as follows:
1) preparation of base polyurethane prepolymer for use as
By above-mentioned weight proportion above-mentioned polyol compound is added reaction kettle; 100 ~ 120 ℃ of temperature in the kettle, vacuumize the dehydration 2 ~ 3h after, be cooled to 60 ~ 70 ℃; Add above-mentioned isocyanic ester, catalyzer, softening agent more in proportion; Under the nitrogen protection condition, 80 ~ 90 ℃ down reaction 4h be cooled to about 60 ℃, base polyurethane prepolymer for use as;
2) the concrete preparation of polyurethane asphalt
Above-mentioned fluxed asphalt is mixed with above-mentioned base polyurethane prepolymer for use as according to the above ratio, and stirring makes polyurethane asphalt; Above-mentioned gathering materials stirred in container, in container, add the said polyurethane asphalt that makes then in proportion, mix is even under the normal temperature, promptly gets the polyurethane asphalt concrete.
8. will be applied to paving or repairing of bituminous pavement like each said polyurethane asphalt concrete of claim 1～6.
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