CN1289801A - Process for preparing polymer-asphalt composition - Google Patents
Process for preparing polymer-asphalt composition Download PDFInfo
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- CN1289801A CN1289801A CN 99119742 CN99119742A CN1289801A CN 1289801 A CN1289801 A CN 1289801A CN 99119742 CN99119742 CN 99119742 CN 99119742 A CN99119742 A CN 99119742A CN 1289801 A CN1289801 A CN 1289801A
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Abstract
A polymer-asphalt composition is prepared through heating asphalt (85-94.9 wt.%) to 100-220 deg.C, sequentially adding polymer (3-10), compatible agent (2-10) and reaction assistant (0.1-2), stirring and reacting for 0.5-3.5 hr. Its advantages include simple process, better storage stability and excellent high temp and low-temp performance.
Description
The invention belongs to a kind of bituminous material preparation of compositions method, more specifically saying so belongs to a kind of preparation method of polymer-asphalt composition.
Petroleum pitch has good plasticity-, adhesivity and visco-elasticity, so it is always as the topmost organic binding material of countries in the world urban road laying.But along with the fast development of highway communication, the handling characteristics of high grade pavement is: traffic density is big, vehicle maximizes, overload increases the weight of, the loading action time is short, the speed of a motor vehicle increases and the density increase is very fast.Above-mentioned these characteristics make original bituminous pavement suffer serious destruction, and especially under high-temperature condition, crowded carbuncle bag is serious.South is aging and be subjected to that the water logging bubble is peeled off etc. situation happens occasionally during rainy season; At northern frore area since day and night temperature to reach nocturnal temperature more greatly low excessively, cause ground low temperature reflection crack and freeze thawing phenomenon, cause the various aspects of performance on road surface to descend, quicken the destruction on road surface.Therefore be necessary bituminous material is carried out improvement in performance.
Asphalt modification mainly uses high molecular polymer, to improve bituminous visco-elasticity and rheological characteristics.Asphalt modifier commonly used is generally polyethylene (PE), phthalic acid allyl group/propyl diester (APP), styrene-isoprene-styrene copolymer-(SIS), styrene-butadiene-styrene terpolymer (SBS) and ethene-acetic acid-ethylene-dien terpolymer (EVA), polyamine class, polyester, epoxy resin etc.
WO97/30121 using polystyrol (PS) is as modified asphalt material, but vinylbenzene and pitch intermiscibility are bad, become homogeneous phase for PS can be merged better in pitch, adding contains the segmental triblock polymer SBS of PS and prepares the good modified pavement asphalt of package stability as compatilizer.Because PS unusual indissoluble in pitch only relies on the effect of SBS, effect is also unsatisfactory.
USP5,348,994 elder generations with the pitch sulfonation, are properties-correcting agent with isoprene-isobutylene rubber SBS or EPDM with oleum, also be to form stable continuous mutually with sulfonated gilsonite behind the process sulfuric acid sulfonation earlier, and be that neutralizing agent neutralizes with alkali again.This patent is that pitch and polymkeric substance are all carried out mixing and stirring technology after the modification.But its preparation process is more loaded down with trivial details, needs pitch and properties-correcting agent are all carried out modification, and this increases production difficulty and cost undoubtedly.
CN1121939A directly carries out modification to pitch in the input pitch after using waste polymer SBR and SBS or PE fragmentation, and the pitch after the modification has better rheological characteristics than material asphalt.But the general stability of the pitch of this method preparation is bad, and separation phenomenon easily takes place for polymkeric substance and pitch, is applicable to on-site preparation, and on-the-spot and aggregate mixes and stirs.
CN1068835A also is that technology is mixed and stirred at the scene, uses rubber powder modified asphalt, and method is for carrying out making 140～160 ℃ of following and pitch blend after earlier rubber powder being mixed with the mineral aggregate fine powder, and the advantage of this method is simple.Weak point is that rubber powder can not fully merge with pitch, only depends on physical mechanical power with mineral aggregate, and pitch is bonding to press together, anti-water peel off and ageing resistance not high, also be necessary for simultaneously on-site preparation, rig-site utilization.
In sum, the road modified asphalt technology that CN1121939A, CN1068835A narrated mainly is on-site preparation, rig-site utilization, mostly package stability is not ideal enough for the modifying asphalt of preparation, promptly at high temperature (160～180 ℃), polymer modifiers and material asphalt separation phenomenon easily take place during standing storage, therefore modified bitumen product needs constantly to stir to store, and reduces the degree that is separated.USP5,348,994 relatively pay attention to properties-correcting agent and bituminous consistency and stable problem, have only the good pitch of properties-correcting agent and bitumen compatibility just can reach the purpose product of shelf-stable, this method preparation process is more loaded down with trivial details, need pitch and properties-correcting agent are all carried out modification, this increases production difficulty and cost undoubtedly.WO97/30121 PS modifying asphalt, owing to PS unusual indissoluble in pitch, only rely on the effect of SBS, effect is also unsatisfactory.
The purpose of this invention is to provide a kind of preparation method of polymer-asphalt composition, said composition has satisfactory stability.
The preparation method of polymer-asphalt composition provided by the invention is: the pitch of 85～94.9 heavy % is heated to 100～220 ℃ preferably 150～180 ℃, add the polymkeric substance of 3～10 heavy %, the compatilizer of 2～10 heavy % and the reaction promoter of 0.1～2 heavy % successively, under agitation reacted 0.5～3.5 hour preferably 1.0～2.0 hours.
Described pitch is one or more the mixture that is selected among petroleum pitch, coal-tar pitch, oil sands bitumen, the rock asphalt, wherein petroleum pitch is one or more the mixture that is selected among straight-run pitch, solvent deoiling pitch, the oxidized bitumen, straight-run pitch can be the long residuum of crude oil, also can be the vacuum residuum of crude oil.The bituminous stable hydrocarbon is 9～20 heavy %, and aromatic hydrocarbon is 25～60 heavy %, and colloid is 15～40 heavy %, and bituminous matter is 5～15 heavy %.
Described polymkeric substance is the ter-polymers (following brief note SBS) of the binary polymer (following brief note SB) that is selected from vinylbenzene-conjugated diolefine, vinylbenzene-conjugated diolefine, one or both the mixture among the ethene-propene-diene terpolymer thing (following brief note EPDM), and wherein conjugated diolefine is isoprene or divinyl.Cinnamic content is 50～70% in SB, and cinnamic content is 20～40% among the SBS.
Described compatilizer is to be rich in polarity gelationus compound or petroleum by-product, and its boiling point is preferably in more than 350 ℃ more than 300 ℃.The effect of compatilizer is to make polymkeric substance and pitch be fused into homogeneous system better, and this compatilizer finally becomes the part of composition.The compatilizer that is adopted among the present invention be selected from nilox resin, contain sour Yatall MA, pyrolysis fuel oil, catalytically cracked oil, heavy deasphalted oil, solvent treatment extract one or more the mixture among oil, the ethylene bottom oil out, wherein heavy deasphalted oil also is referred to as colloid, is the byproduct that is rich in aromatic hydrocarbons that obtains in two sections solvent deasphalting technologies.
Described reaction promoter is the cross-linking type reaction promoter, is selected from one or more the mixture among organo-peroxide linking agent, metal oxide cross-linked agent, resene linking agent, sulfide linking agent, sulphur class, the vulcanization accelerator.This linking agent can be to be rich in sulphur body linking agent, also can be the non-sulphur body compound of giving.
Preparation method's technology provided by the invention is simple, both can produce in the refinery, is transported to the making scene then, can prepare at the scene again, at any time making.Compare with the bituminous composition that mix and stir at the scene by the bituminous composition that method provided by the invention makes, difference is that the former has good stability, in the preparation process just by grinding with the physical process of polymer dispersed in pitch, macromolecular chemical reaction also takes place simultaneously.Make pitch-reaction promoter-stable macromolecule network structure of polymer formation, as shown below:
As can be seen from the figure, have only to have formed crosslinked macromolecular network structure, could guarantee that pitch and polymkeric substance are difficult for separating, stability just can be guaranteed.
After the package stability of bituminous composition was meant that composition is placed a couple of days at a certain temperature, pitch and polymkeric substance still were in the homogeneous state that mixes.The testing method of package stability is as follows: pitch is placed in the elongate tube, placed under the high temperature more than 170 ℃ 48～50 hours, represent the state of composition stable with the difference of upper and lower layer bituminous softening temperature in the pipe.When the difference of softening temperature was lower than 4 ℃, phenomenon of phase separation did not take place in pitch and polymkeric substance substantially, was the good composition of package stability.
The bituminous composition that is made by method provided by the invention can be used as the high grade highway pavement pavement material, and this product has the viscoelastic region of broad, and the high-temperature aging resisting performance is good, has the good low-temperature flexibility.This application range of products is very wide, both applicable to the higher southern area of temperature, again applicable to north cold region, is particularly useful for the abominable area of weather condition, also applicable to the resistant to elevated temperatures particular requirement laying of roadway of airfield runway.
Aspect the high-temperature behavior of bituminous composition, the viscosity of the bituminous composition that is made by method provided by the invention improves greatly, 135 ℃ of viscosity of material asphalt are below 500 centipoises, and 135 ℃ of viscosity of bituminous composition are brought up to more than 1200 centipoises, and aging resistance improves greatly, viscosity is very little in the rangeability before and after aging, and 135 ℃ of viscosity of aging front and back are almost constant, illustrate that this bituminous composition has stronger resistance of aging.In addition, the bituminous softening temperature increases substantially after adding polymkeric substance, generally between 65～90 ℃, softening temperature is an important index weighing pitch opposing high-temperature behavior, therefore, the bituminous composition that is made by the inventive method can prevent that not only the hot mastication trickling phenomenon on southern area road surface in summer from taking place, and can also satisfy the airfield runway TRANSIENT HIGH TEMPERATURE to the bituminous requirement.
Aspect the low-temperature performance of bituminous composition, bituminous composition low temperature (5 ℃) ductility that is made by the inventive method is generally greater than 40 centimetres, and the low-temperature ductility of material asphalt is only about 10 centimetres.The low temperature brittle point of bituminous composition also reduces significantly, and the brittle point of bituminous composition can reach below-15 ℃, and the low temperature brittle point of material asphalt is between-5～-10 ℃, illustrate bituminous composition at low temperatures the cracking resistance ability improve greatly.
Therefore, the bituminous composition that is made by the inventive method has higher softening temperature and good low-temperature performance, and the use temperature range of choice is wide, especially can be used in the more abominable area of weather condition, the area that promptly day and night temperature is big, nocturnal temperature is low.
The load deformation characteristic of bituminous material represents that with the sticking toughness of bituminous sticking toughness is the index that is specifically designed to the anti-weight bearing power of measuring modifying asphalt.The amplitude that sticking toughness improves is big more, and the anti-weight bearing power of this bituminous is strong more, and the bond stress to building stones is strong more simultaneously, and enough opposing aggregate displacement deformations and the ability that comes off can be provided in asphalt.In highway Modified Bitumen Pavement construction technique normalizing (JTJ036-98), sticking toughness＞5.0 Newton meters of regulation polymer modified asphalt, toughness＞2.5 Newton meters.The sticking toughness of material asphalt is general＜5.0 Newton meters, toughness＜2.0 Newton meters, the sticking toughness of pitch after polymer modification can reach 20～30 Newton meters, toughness also improves a lot, can reach more than 15 Newton meters, explanation is improved a lot by anti-load deformability of bituminous composition and the impact resistance that the inventive method makes, this not only can be used as the paver of high grade highway pavement, also can be used as simultaneously the laying of roadway material of airfield runway, this will help the heavy burden of airport pavement opposing aircraft, can cushion pavement cracking that the impact owing to aircraft landing produces and loose destructiveness simultaneously.In addition, because the sticking good toughness of the bituminous composition of present method preparation is stronger to the attached power of wrapping up in of building stones, also be highly suitable for southern area rainy and that humidity is bigger.
In sum, preparation method's technology provided by the invention is simple, both can produce in the refinery, is transported to the making scene then, can prepare at the scene again, at any time making.The bituminous composition that is made by preparation method provided by the invention has good storage stability, consistency and good high and low temperature performance.
Below in conjunction with embodiment the preparation method of polymer-asphalt composition provided by the invention is further specified, but not thereby limiting the invention.
The character of the asphalt stock that the present invention is used is as shown in table 1.The high-speed shearing machine model is L100, is produced by Qidong, Jiangsu chemical industry equipment factory.Isolation test is to carry out according to the method that ASTM D5892-96a provides.
Embodiment 1
540 gram solvent deoiling bitumen A are preheating to 150 ℃, (wherein styrene content is 30% to add 30 gram polymkeric substance SBS earlier, its trade names are 4303 types, are produced by chemical plant, the Yanshan Mountain), as the consecutive reaction in the table 2 after 10 minutes, add 24 gram compatilizer catalytically cracked oils, 6 gram reaction promoter sulphur then successively, temperature of reaction control is constant, stirs in high-speed shearing machine L100, and rotating speed is 1000 rev/mins, react after 1.0 hours, promptly make the bituminous composition product.Test-results is as shown in table 2.
As can be seen from Table 2, the difference of levels softening temperature is only 1 ℃ in the isolation test, promptly polymkeric substance and pitch be regardless of substantially from, stability fine.
Comparative Examples 1
Compare with embodiment 1, do not add compatilizer and reaction promoter in the Comparative Examples 1.
570 gram solvent deoiling bitumen A are preheating to 150 ℃, only add 30 gram polymkeric substance SBS, as the consecutive reaction in the table 2 after 10 minutes, temperature of reaction control is constant, stirs in high-speed shearing machine L100, and rotating speed is 1000 rev/mins, react after 1.0 hours, promptly make the bituminous composition product.Test-results is as shown in table 2.
As can be seen from Table 2, the difference of levels softening temperature is up to 72 ℃ in the isolation test, and promptly the situation of polymkeric substance and separated from bitumen is very serious, and stability is very poor.
Comparative Examples 2
Compare with embodiment 1, do not add reaction promoter in the Comparative Examples 1.
546 gram solvent deoiling bitumen A are preheating to 150 ℃, add 30 gram polymkeric substance SBS earlier, as the consecutive reaction in the table 2 after 10 minutes, add 24 gram compatilizer catalytically cracked oils then, temperature of reaction control is constant, stirs in high-speed shearing machine L100, and rotating speed is 1000 rev/mins, react after 1.0 hours, promptly make the bituminous composition product.Test-results is as shown in table 2.
As can be seen from Table 2, the difference of levels softening temperature is 45 ℃ in the isolation test, and promptly the situation of polymkeric substance and separated from bitumen is comparatively serious, less stable.Illustrate and only add the bituminous composition that compatilizer can not obtain having good stability, and behind the embodiment 1 adding reaction promoter, bituminous composition experiment showed, that through segregation the difference of levels softening temperature can reach 1 ℃ the level that is not more than, bituminous stability improves, and aging resistance improves.
Embodiment 2
568 gram coal-tar pitch B are preheating to 150 ℃, add 18 gram polymkeric substance SBS earlier, as the consecutive reaction in the table 3 after 10 minutes, add 12 gram compatilizer nilox resins, 2.4 gram reaction promoter urethane then successively, temperature of reaction control is constant, stirs in high-speed shearing machine L100, and rotating speed is 1000 rev/mins, react after 1.5 hours, promptly make the bituminous composition product.Test-results is as shown in table 3.
As can be seen from Table 3, the difference of levels softening temperature is only 0.8 ℃ in the isolation test, promptly polymkeric substance and pitch be regardless of substantially from, stability fine.The sticking toughness of bituminous composition is more a lot of than the increase of material asphalt, illustrates that the anti-weight bearing power of bituminous composition obtains bigger raising.
Embodiment 3
547 gram coal-tar pitch B are preheating to 170 ℃, add each 7.5 gram of polymkeric substance SBS, SB earlier, as the consecutive reaction in the table 3 after 10 minutes, add 20 gram compatilizer heavy deasphalted oils, 3 gram reaction promoter sulphur then successively, temperature of reaction control is constant, stirs in high-speed shearing machine L100, and rotating speed is 1000 rev/mins, react after 1.0 hours, promptly make the bituminous composition product.Test-results is as shown in table 3.
As can be seen from Table 3, the difference of levels softening temperature is only 0.5 ℃ in the isolation test, promptly polymkeric substance and pitch be regardless of substantially from, stability fine.The sticking toughness of bituminous composition is more a lot of than the increase of material asphalt, illustrates that the anti-weight bearing power of bituminous composition obtains bigger raising.
Embodiment 4
532 gram coal-tar pitch B are preheating to 180 ℃, add 42 gram polymkeric substance EPDM (by Jilin Chemical Industry Company production) earlier, as the consecutive reaction in the table 4 after 10 minutes, add 20 gram compatilizers then successively and contain sour Yatall MA, 6 gram reaction promoter benzoyl peroxides (rubber plant produces by Daxing, Beijing), temperature of reaction control is constant, stirs in high-speed shearing machine L100, and rotating speed is 1000 rev/mins, react after 1.0 hours, promptly make the bituminous composition product.Test-results is as shown in table 4.
As can be seen from Table 4, the difference of levels softening temperature is only 1 ℃ in the isolation test, promptly polymkeric substance and pitch be regardless of substantially from, stability fine.The sticking toughness of bituminous composition is more a lot of than the increase of material asphalt, illustrates that the anti-weight bearing power of bituminous composition obtains bigger raising.
Embodiment 5
516 gram oil sands bitumen C are preheating to 200 ℃, (wherein styrene content is 70% to add 48 gram polymkeric substance SB earlier, by Jilin Chemical Industry Company production),, add 30 gram compatilizers then successively and contain sour Yatall MA, 2 gram reaction promoter zinc oxide, 4 gram reaction promoter sulphur after 10 minutes as the consecutive reaction in the table 4, temperature of reaction control is constant, in high-speed shearing machine L100, stir, rotating speed is 1000 rev/mins, reacts after 1.0 hours, promptly makes the bituminous composition product.Test-results is as shown in table 4.
As can be seen from Table 4, the difference of levels softening temperature is only 1.5 ℃ in the isolation test, promptly polymkeric substance and pitch be regardless of substantially from, stability fine.The sticking toughness of bituminous composition is more a lot of than the increase of material asphalt, illustrates that the anti-weight bearing power of bituminous composition obtains bigger raising.
Table 1
Table 2
Table 3
Table 4
Claims (10)
1, a kind of preparation method of polymer-asphalt composition, it is characterized in that the pitch of 85～94.9 heavy % is heated to 100～220 ℃, add the polymkeric substance of 3～10 heavy %, the compatilizer of 2～10 heavy % and the reaction promoter of 0.1～2 heavy % successively, under agitation reacted 0.5～3.5 hour.
2, according to the preparation method of claim 1, it is characterized in that temperature of reaction is 150～180 ℃, the reaction times is 1.0～2.0 hours.
3, according to the preparation method of claim 1, it is characterized in that described pitch is one or more the mixture that is selected among petroleum pitch, coal-tar pitch, oil sands bitumen, the rock asphalt, the bituminous stable hydrocarbon is 9～20 heavy %, aromatic hydrocarbon is 25～60 heavy %, colloid is 15～40 heavy %, and bituminous matter is 5～15 heavy %.
4,, it is characterized in that described petroleum pitch is one or more the mixture that is selected among straight-run pitch, solvent deoiling pitch, the oxidized bitumen according to the preparation method of claim 3.
5, according to the preparation method of claim 4, it is characterized in that described straight-run pitch can be the long residuum of crude oil, also can be the vacuum residuum of crude oil.
6,, it is characterized in that described polymkeric substance is the ter-polymers of the binary polymer that is selected from vinylbenzene-conjugated diolefine, vinylbenzene-conjugated diolefine, one or both the mixture among the ethene-propene-diene terpolymer thing according to the preparation method of claim 1.
7, according to the preparation method of claim 6, it is characterized in that cinnamic content is 50～70% in the binary polymer of described vinylbenzene-conjugated diolefine, cinnamic content is 20～40% in the ter-polymers of vinylbenzene-conjugated diolefine.
8,, it is characterized in that described conjugated diolefine is isoprene or divinyl according to the preparation method of claim 6 or 7.
9, according to the preparation method of claim 1, it is characterized in that described compatilizer be selected from nilox resin, contain sour Yatall MA, pyrolysis fuel oil, catalytically cracked oil, heavy deasphalted oil, solvent treatment extract one or more the mixture among oil, the ethylene bottom oil out.
10,, it is characterized in that described reaction promoter is one or more the mixture that is selected among organo-peroxide linking agent, metal oxide cross-linked agent, resene linking agent, sulfide linking agent, sulphur class, the vulcanization accelerator according to the preparation method of claim 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991197429A CN1148416C (en) | 1999-09-29 | 1999-09-29 | Process for preparing polymer-asphalt composition |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB991197429A CN1148416C (en) | 1999-09-29 | 1999-09-29 | Process for preparing polymer-asphalt composition |
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| CN1289801A true CN1289801A (en) | 2001-04-04 |
| CN1148416C CN1148416C (en) | 2004-05-05 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100343337C (en) * | 2003-03-06 | 2007-10-17 | 深圳市海川实业股份有限公司 | Modified asphalt mixture |
| WO2008055401A1 (en) * | 2006-11-09 | 2008-05-15 | Shenzhen Oceanpower Industrial Co., Ltd. | High viscosity asphalt modifier |
| CN100451057C (en) * | 2006-12-29 | 2009-01-14 | 四川师范大学 | Adjuvant for promoting SBS modified asphalt high low temperature property and its usage method |
| CN101143968B (en) * | 2006-09-15 | 2011-04-06 | 中国石油化工股份有限公司抚顺石油化工研究院 | Waste rubber powder modified asphalt composition for increasing storage stability and preparation method thereof |
| CN103232714A (en) * | 2013-05-03 | 2013-08-07 | 中海油（青岛）重质油加工工程技术研究中心有限公司 | High-softening-point SBS (styrene-butadiene-styrene) modified asphalt and preparation method thereof |
| CN103773011A (en) * | 2012-10-25 | 2014-05-07 | 中国石油化工股份有限公司 | Asphalt regenerant and preparation method thereof |
| CN104495211A (en) * | 2014-11-28 | 2015-04-08 | 周正英 | Multifunctional belt conveyor |
| CN106633269A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | High-modulus asphalt mixture additive and preparation method thereof |
| CN113801486A (en) * | 2020-06-17 | 2021-12-17 | 中国石油化工股份有限公司 | Epoxy asphalt material and preparation method thereof |
| CN113969064A (en) * | 2020-07-24 | 2022-01-25 | 中国石油化工股份有限公司 | SBR modified asphalt and preparation method and application thereof |
| CN113969063A (en) * | 2020-07-24 | 2022-01-25 | 中国石油化工股份有限公司 | Polymer modified asphalt and preparation method and application thereof |
-
1999
- 1999-09-29 CN CNB991197429A patent/CN1148416C/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100343337C (en) * | 2003-03-06 | 2007-10-17 | 深圳市海川实业股份有限公司 | Modified asphalt mixture |
| CN101143968B (en) * | 2006-09-15 | 2011-04-06 | 中国石油化工股份有限公司抚顺石油化工研究院 | Waste rubber powder modified asphalt composition for increasing storage stability and preparation method thereof |
| WO2008055401A1 (en) * | 2006-11-09 | 2008-05-15 | Shenzhen Oceanpower Industrial Co., Ltd. | High viscosity asphalt modifier |
| CN100451057C (en) * | 2006-12-29 | 2009-01-14 | 四川师范大学 | Adjuvant for promoting SBS modified asphalt high low temperature property and its usage method |
| CN103773011B (en) * | 2012-10-25 | 2015-11-18 | 中国石油化工股份有限公司 | A kind of bitumen regenerant and preparation method thereof |
| CN103773011A (en) * | 2012-10-25 | 2014-05-07 | 中国石油化工股份有限公司 | Asphalt regenerant and preparation method thereof |
| CN103232714A (en) * | 2013-05-03 | 2013-08-07 | 中海油（青岛）重质油加工工程技术研究中心有限公司 | High-softening-point SBS (styrene-butadiene-styrene) modified asphalt and preparation method thereof |
| CN103232714B (en) * | 2013-05-03 | 2015-04-15 | 中国海洋石油总公司 | High-softening-point SBS (styrene-butadiene-styrene) modified asphalt and preparation method thereof |
| CN104495211A (en) * | 2014-11-28 | 2015-04-08 | 周正英 | Multifunctional belt conveyor |
| CN106633269A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | High-modulus asphalt mixture additive and preparation method thereof |
| CN106633269B (en) * | 2015-11-02 | 2019-08-06 | 中国石油化工股份有限公司 | A kind of High Modulus Bituminous Mixtures Additive and preparation method thereof |
| CN113801486A (en) * | 2020-06-17 | 2021-12-17 | 中国石油化工股份有限公司 | Epoxy asphalt material and preparation method thereof |
| CN113801486B (en) * | 2020-06-17 | 2023-02-03 | 中国石油化工股份有限公司 | Epoxy asphalt material and preparation method thereof |
| CN113969064A (en) * | 2020-07-24 | 2022-01-25 | 中国石油化工股份有限公司 | SBR modified asphalt and preparation method and application thereof |
| CN113969063A (en) * | 2020-07-24 | 2022-01-25 | 中国石油化工股份有限公司 | Polymer modified asphalt and preparation method and application thereof |
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| Publication number | Publication date |
|---|---|
| CN1148416C (en) | 2004-05-05 |
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