CN104016612B - A kind of blend graft modifiies prepares the method that the anti-rut of bituminous concrete splits agent - Google Patents
A kind of blend graft modifiies prepares the method that the anti-rut of bituminous concrete splits agent Download PDFInfo
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Abstract
The present invention relates to a kind of blend graft to modifiy and prepare the method that the anti-rut of bituminous concrete splits agent.It concretely comprises the following steps: 1) by polymer 100 mass parts, anhydride 0.1～5 mass parts, initiator 0.1～2 mass parts, be sufficiently mixed, prepare with double-screw extruding pelletizing polymer-modified in high-speed mixer；2) by polymer-modified 50～80 mass parts, filler 10～30 mass parts, toughener 10～50 mass parts, viscosifier 0.5～10 mass parts, antioxidant 0.1～5 mass parts, high-speed mixer is sufficiently mixed, it is then added in double screw extruder and carries out melt blending, control temperature 160 DEG C～200 DEG C, screw speed 20～40r/min, extruding pelletization, obtains anti-rut and splits agent.Compared with prior art, the inventive method technique is simple, and cost is low, is suitable for industrialized production, eliminates the process procedure of asphalt modification, remarkable in economical benefits, and the anti-rut of gained splits agent can significantly improve bituminous concrete high temperature anti-rut behavior and crack resistance at low-temperature.
Description
Technical field
The invention belongs to asphalt concrete modifying agent preparing technical field, it particularly relates to a kind of blend graft modifiies prepares the method that the anti-rut of bituminous concrete splits agent.
Background technology
Along with the fast development of national economy and transportation, traffic big flow vehicle maximization heavy duty overload and canalized traffic etc. are increasingly becoming distinguishing feature and the inexorable trend of Modern Traffic.The continuing of simultaneous global climate is warmed, and road occupation condition becomes day by day harsh.At present, high temperature rut that asphalt pavement of highway is produced by road researcher, cold cracking have understanding and mental preparation relatively fully, for this, in the combination of bituminous texture layer and Bitumen Concrete Mixture Ratio Design, take a series of measure.But; emphasize to improve the anti-rut behavior of bituminous paving simply; and the cold cracking that asphalt pavement of highway is likely to occur and water stability not enough (main manifestations is pit, loose phenomenon); but it is not contemplated to; be particularly in average temperature of the whole year low, the highway of sunshine-duration length and rainy humid area, road surface often occur cracking, pitted skin, loose, fall the cracking such as grain or even pit and Moisture Damage; this noticeable earlier period damage, is that people are quite unexpected.The generation of rut disease, cold cracking and Moisture Damage can cause bituminous paving shortening in service life as can be seen here; road surface is made to enter maintenance and alteration stage in advance; heavily spread cover still entrance reconstruction in advance whether through milling and all can cause the huge wasting of resources and investment loss; the former ground surface material that milling is got off also can become huge polluter, is unfavorable for environmental conservation.
For solving the various diseases of bituminous paving, the improvement of bituminous concrete constantly in research prevention and solution, is mainly had two aspects by road researcher both at home and abroad.One is that Colophonium is modified, namely by adding various polymer in Colophonium or other inorganic material improve the pavement performance of Colophonium；Two is that bituminous concrete is modifiied, and namely mixes certain anti-rut agent, fiber in the production process of bituminous concrete to improve the Rut resistance effect of bituminous concrete.Centered by asphalt modification technical research, most study is physical modification agent, as a series of with polymer modification in SBS SBR and SIS etc.；Part company also develops chemical modifier, and modified effect is good, such as the epoxy polymer E.I.Du Pont Company Elvaloy product etc. of Shell Co. Ltd.Attach most importance to the research of bituminous concrete modification technology, develop and various outer mix modifying agent, such as special outer-penetrating agents such as waste old fiber waste or used plastics kieselguhr and anti-rut agents.
On market, anti-rut agent product mainly has the PRIPLAST etc. of SEAM and the French PR I company of the DUROFLEX of German Ba Saier group, shell Colophonium company.These products are notable, easy to use to improving bituminous concrete anti-rut behavior effect, but to improving bituminous concrete crack resistance at low-temperature DeGrain, selling price is expensive simultaneously, promotes the use of and is restricted.
Summary of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of blend graft and modifiy and prepare the method that the anti-rut of bituminous concrete splits agent.The method technique is simple, less costly, is suitable for industrialized production, and obtained anti-rut splits agent and can significantly improve anti-rut behavior and the crack resistance at low-temperature of bituminous concrete.
A kind of blend graft modifiies prepares the method that the anti-rut of bituminous concrete splits agent, described method concretely comprises the following steps: 1) by polymer 100 mass parts, anhydride 0.1～5 mass parts, initiator 0.1～2 mass parts, high-speed mixer is sufficiently mixed, prepares with double-screw extruding pelletizing polymer-modified；2) by polymer-modified 50～80 mass parts, filler 10～30 mass parts, toughener 10～50 mass parts, viscosifier 0.5～10 mass parts, antioxidant 0.1～5 mass parts, high-speed mixer is sufficiently mixed, it is then added in double screw extruder and carries out melt blending, control temperature 160 DEG C～200 DEG C, screw speed 20～40r/min, extruding pelletization, obtains anti-rut and splits agent.
Described step 1) in polymer be regenerated polythene class or/and regenerating polypropylene class.
Described step 1) in anhydride be the carboxylic acid anhydrides containing 2-8 carbon atom.
Described step 1) in initiator be one or more in di-isopropyl peroxydicarbonate, dibenzoyl peroxide, cumyl peroxide, di-tert-butyl peroxide, tert-butyl peroxide, potassium peroxydisulfate.
Described step 1) in the technological parameter of twin screw be processing temperature 140 DEG C～180 DEG C, screw speed 30～50r/min.
Described step 2) in filler be calcium sulfate crystal whiskers, toughener is one or more in liquid polysulfide rubber, SBS, EVA.
Described step 2) in viscosifier be rosin resin or Petropols.
Described step 2) in antioxidant be Corm Eleocharitis phenol.
Described step 2) in antioxidant be phenols or phosphorous acid esters.
Adopting above technical scheme, the anti-rut of high-performance bituminous concrete of the present invention splits agent and has the following characteristics that
(1) to split agent performance controlled for anti-rut.The modifying agent antagonism rut of different addition quantity splits agent system and carries out graft modification, and different formula compositions gives anti-rut and splits the excellent pavement performance of agent and processing performance.Initiator gives the activity that mixture is suitable, it is simple to it is grafted modified；Toughener gives anti-rut and splits the toughness that agent is excellent, improves its shock resistance and cracking resistance；Viscosifier strengthen the bonding force between Colophonium and concrete, improve the durability of bituminous concrete.
(2) adopt calcium sulfate crystal whiskers as inorfil reinforcing material, this material be shaped like in chopped fiber size much smaller than chopped fiber must shape monocrystal, its diameter is minimum, draw ratio is very big, there is the atomic arrangement structure of high-sequential, almost without the defect existed in generally big crystal, there is extremely excellent physicochemical properties and excellent mechanical performance.Compared with commonly used organic short fiber, calcium sulfate crystal whiskers is better with the compatibility of various inorganic fillers, dispersibility is better, the problem being substantially not present dispersibility, have substantially no effect on anti-rut and split the service behaviour of agent, split the state forming a kind of uniform random distribution in agent at anti-rut, make structural stress disperse, produce two grades of stiffening effects, thus being effectively improved breaking resistance comprcssive strength and the rupture strength of bituminous concrete.
(3) there is physical/chemical effect.Anti-rut splits after agent is dissolved in Colophonium, mutually it is wound around between its high molecular polymer main chain and between active group, produces active force, form 3 D cross-linked network structure, this 3 D cross-linked network structure wraps on free Colophonium, limiting the flowing of free Colophonium on the one hand, producing active force by active modification group with the active group in Colophonium on the other hand, thus forming the viscoelastic material of a kind of high intensity, improve cohesiveness and the viscosity of Colophonium, reduce its temperature sensitivity.Anti-rut splits active modification group and aggregate surface in modifying agent and is prone to produce relatively high forces simultaneously, improve the adhesion of Colophonium and aggregate, between Colophonium and mineral aggregate, not only form polymer put up a bridge, and split generation physical/chemical effect between agent at Colophonium and anti-rut, and then it is obviously enhanced the ability of asphalt opposing external force deformation, improve compound high temperature anti-rut behavior and crack resistance at low-temperature.
Compared with prior art, blend graft of the present invention modifiies to be prepared the anti-rut of bituminous concrete and splits the method for agent and have the advantage that the high temperature anti-rut behavior and crack resistance at low-temperature that can significantly improve bituminous concrete, extends the service life of bituminous paving；With regenerated polymer for primary raw material, it is achieved that recycling of resource, improve its use value, environmental benefit is notable；This method technique is simple, and cost is low, is suitable for industrialized production, eliminates the process procedure of asphalt modification, remarkable in economical benefits.
Detailed description of the invention
Below in conjunction with specific embodiment blend graft of the present invention modifiied and prepare the anti-rut of bituminous concrete and split the method for agent and be described further, but protection scope of the present invention is not limited to this.
Embodiment 1
(1) regeneration PE90 mass parts, regeneration PP10 mass parts, MAH1 mass parts, di-tololyl peroxide 0.5 mass parts are weighed, high-speed mixer is sufficiently mixed, compound joins in double screw extruder, at 140 DEG C of barrel temperatures, carrying out fusion-grafting mixing under the rotating speed of 30r/min, extruding pelletization prepares polymer-modified.
(2) weigh polymer-modified 70 mass parts, calcium sulfate crystal whiskers 10 mass parts, SBS10 mass parts, EVA10 mass parts, rosin resin 1 mass parts, 2,6-di-t-butyl-4 (dimethyl aminomethyl) phenol 0.5 mass parts, carry out melting mixing at twin screw, under melt blending temperature 160 DEG C, screw speed 30r/min, prepare anti-rut split agent.
Embodiment 2
(1) regeneration PE80 mass parts, regeneration LDPE20 mass parts, MAH0.5 mass parts, di-tert-butyl peroxide 0.25 mass parts are weighed, high-speed mixer is sufficiently mixed, compound joins in double screw extruder, at 180 DEG C of barrel temperatures, carrying out fusion-grafting mixing under the rotating speed of 50r/min, extruding pelletization prepares polymer-modified.
(2) polymer-modified 50 mass parts, calcium sulfate crystal whiskers 10 mass parts, SBS20 mass parts, EVA20 mass parts, Petropols 0.5 mass parts, tert-butyl hydroquinone 1 mass parts are weighed, carry out melting mixing at twin screw, under melt blending temperature 200 DEG C, screw speed 40r/min, prepare anti-rut split agent.
Embodiment 3
(1) regeneration PE70 mass parts, regeneration PP10 mass parts, MAH1.5 mass parts, phthalic anhydride 0.5 mass parts, dioxide diisopropylbenzene (DIPB) 1 mass parts are weighed, high-speed mixer is sufficiently mixed, compound joins in double screw extruder, at 160 DEG C of barrel temperatures, carrying out fusion-grafting mixing under the rotating speed of 40r/min, extruding pelletization prepares polymer-modified.
(2) polymer-modified 65 mass parts, calcium sulfate crystal whiskers 10 mass parts, SBS10 mass parts, EVA5 mass parts, liquid polysulfide rubber 10 mass parts, rosin resin 0.5 mass parts, Petropols 0.5 mass parts, tricresyl phosphite (2 are weighed, 4-di-tert-butyl-phenyl) ester 1 mass parts, carry out melting mixing at twin screw, under melt blending temperature 180 DEG C, screw speed 30r/min, prepare anti-rut split agent.
Embodiment 4
(1) regeneration PE70 mass parts, regeneration HDPE10 mass parts, regeneration LDPE10 mass parts, regeneration PP10 mass parts, MAH1 mass parts, tert-butyl peroxide 0.5 mass parts are weighed, high-speed mixer is sufficiently mixed, compound joins in double screw extruder, at 140 DEG C of barrel temperatures, carrying out fusion-grafting mixing under the rotating speed of 40r/min, extruding pelletization prepares polymer-modified.
(2) polymer-modified 80 mass parts, calcium sulfate crystal whiskers 5 mass parts, EVA10 mass parts, liquid polysulfide rubber 5 mass parts, rosin resin 1 mass parts, distearyl pentaerythritol bis-phosphite 1 mass parts are weighed, carry out melting mixing at twin screw, under melt blending temperature 160 DEG C, screw speed 30r/min, prepare anti-rut split agent.
Embodiment 5
(1) regeneration PE60 mass parts, regeneration HDPE30 mass parts, regeneration LLDPE10 mass parts, MAH0.8 mass parts, potassium peroxydisulfate 0.4 mass parts are weighed, high-speed mixer is sufficiently mixed, compound joins in double screw extruder, at 180 DEG C of barrel temperatures, carrying out fusion-grafting mixing under the rotating speed of 50r/min, extruding pelletization prepares polymer-modified.
(2) polymer-modified 70 mass parts, calcium sulfate crystal whiskers 10 mass parts, EVA5 mass parts, SBS5 mass parts, liquid polysulfide rubber 10 mass parts, Petropols 1 mass parts, tricresyl phosphite (2 are weighed, 4-di-tert-butyl-phenyl) ester 0.5 mass parts, carry out melting mixing at twin screw, under melt blending temperature 200 DEG C, screw speed 20r/min, prepare anti-rut split agent.
Embodiment 6
(1) regeneration PE50 mass parts, regeneration PP10 mass parts, regeneration HDPE20 mass parts, regeneration LDPE20 mass parts, phthalic anhydride 1 mass parts, di-isopropyl peroxydicarbonate 0.5 mass parts are weighed, high-speed mixer is sufficiently mixed, compound joins in double screw extruder, at 140 DEG C of barrel temperatures, carrying out fusion-grafting mixing under the rotating speed of 30r/min, extruding pelletization prepares polymer-modified.
(2) polymer-modified 70 mass parts, calcium sulfate crystal whiskers 5 mass parts, liquid polysulfide rubber 5 mass parts, SBS20 mass parts, rosin resin 0.5 mass parts, distearyl pentaerythritol bis-phosphite 0.5 mass parts, tricresyl phosphite (2 are weighed, 4-di-tert-butyl-phenyl) ester 0.5 mass parts, carry out melting mixing at twin screw, under melt blending temperature 200 DEG C, screw speed 40r/min, prepare anti-rut split agent.
Embodiment 7
(1) regeneration PE50 mass parts, regeneration PP10 mass parts, regeneration HDPE20 mass parts, regeneration LDPE20 mass parts, phthalic anhydride 1 mass parts, di-isopropyl peroxydicarbonate 0.5 mass parts are weighed, high-speed mixer is sufficiently mixed, compound joins in double screw extruder, at 140 DEG C of barrel temperatures, carrying out fusion-grafting mixing under the rotating speed of 30r/min, extruding pelletization prepares polymer-modified.
(2) polymer-modified 70 mass parts, calcium sulfate crystal whiskers 5 mass parts, liquid polysulfide rubber 5 mass parts, SBS20 mass parts, rosin resin 0.5 mass parts, Corm Eleocharitis phenol 1 mass parts are weighed, carry out melting mixing at twin screw, under melt blending temperature 200 DEG C, screw speed 40r/min, prepare anti-rut split agent.
By China's " highway engineering Colophonium and Asphalt Mixture Experiment code " (JTJ052-2000) standard, volume is after the of the present invention anti-rut of asphalt concrete quality 3 ‰ splits agent, and the high temperature performance of prepared bituminous concrete test specimen improves substantially.The anti-rut that embodiment 1-7 prepares splits agent test result in Table 1.
Table 1: bituminous concrete dynamic stability, flexural-tensile strain test result
As shown in Table 1, the anti-rut that the method for the invention prepares splits agent all can improve high temperature anti-rut behavior and the crack resistance at low-temperature of bituminous concrete.In particular by Corm Eleocharitis phenol as after antioxidant, the index such as the dynamic stability of bituminous concrete and flexural-tensile strain is all obviously improved.Research finds, Corm Eleocharitis phenol can react with polymer-modified when melted, produce viscosity very big and there is the polymer of certain molecule gap, make bituminous concrete enter molecule gap thus not easily temperature influence, finally improve high temperature anti-rut behavior and the crack resistance at low-temperature of bituminous concrete.Compared with prior art, road asphalt agent on crack resistance of concrete rut of the present invention splits agent preparation method and has the advantage that the high temperature anti-rut behavior and crack resistance at low-temperature that can significantly improve bituminous concrete, extends the service life of bituminous paving；With regenerated polymer for primary raw material, it is achieved that recycling of resource, improve its use value, environmental benefit is notable；This method technique is simple, and cost is low, is suitable for industrialized production, eliminates the process procedure of asphalt modification, remarkable in economical benefits.
Claims (4)
1. a blend graft modifiies and prepares the method that the anti-rut of bituminous concrete splits agent, it is characterized in that, described method concretely comprises the following steps: 1) by polymer 100 mass parts, anhydride 0.1～5 mass parts, initiator 0.1～2 mass parts, high-speed mixer is sufficiently mixed, prepares with double-screw extruding pelletizing polymer-modified；2) by polymer-modified 50～80 mass parts, filler 10～30 mass parts, toughener 10～50 mass parts, viscosifier 0.5～10 mass parts, antioxidant 0.1～5 mass parts, high-speed mixer is sufficiently mixed, it is then added in double screw extruder and carries out melt blending, control temperature 160 DEG C～200 DEG C, screw speed 20～40r/min, extruding pelletization, obtains anti-rut and splits agent；
Described step 2) in antioxidant be Corm Eleocharitis phenol；
Described step 1) in polymer be regenerated polythene class or/and regenerating polypropylene class；
Described step 1) in anhydride be the carboxylic acid anhydrides containing 2-8 carbon atom；
Described step 2) in filler be calcium sulfate crystal whiskers；Toughener is one or more in liquid polysulfide rubber, SBS, EVA.
2. method according to claim 1, it is characterized in that, described step 1) in initiator be one or more in di-isopropyl peroxydicarbonate, dibenzoyl peroxide, cumyl peroxide, di-tert-butyl peroxide, tert-butyl peroxide, potassium peroxydisulfate.
3. method according to claim 1, it is characterised in that described step 1) in the technological parameter of double-screw extruding pelletizing be processing temperature 140 DEG C～180 DEG C, screw speed 30～50r/min.
4. method according to claim 1, it is characterised in that described step 2) in viscosifier be rosin resin or Petropols.
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| CN105130256B (en) * | 2015-08-14 | 2017-05-31 | 山西省交通科学研究院 | A kind of energy-saving type asphalt concrete modifying agent and preparation method thereof |
| US10920052B2 (en) * | 2015-12-08 | 2021-02-16 | Nouryon Chemicals International B.V. | Process for reducing fogging from high melt strength polypropylene |
| CN106565132A (en) * | 2016-10-23 | 2017-04-19 | 徐旭辉 | High-temperature resistance concrete annexing agent containing microcrystalline wax |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102250287A (en) * | 2011-05-10 | 2011-11-23 | 华中科技大学 | Method for preparing asphalt concrete anti-rutting agent for road by in-situ graft modification |
| CN102964525A (en) * | 2012-03-08 | 2013-03-13 | 湖北国创高新材料股份有限公司 | Road asphalt mixture rut resisting additive and preparation method thereof |
| CN103788667A (en) * | 2013-12-25 | 2014-05-14 | 上海浦东路桥建设股份有限公司 | Multicomponent system for improving modulus of asphalt mixture, and application method and modified asphalt thereof |
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| JPS60158256A (en) * | 1984-01-27 | 1985-08-19 | Mitsubishi Chem Ind Ltd | Asphalt composition |
| KR100764917B1 (en) * | 2006-07-20 | 2007-10-12 | 주식회사 뉴페이브 | An aspalt modifier comprising polyethylene and waste polypropylene and method for preparing the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102250287A (en) * | 2011-05-10 | 2011-11-23 | 华中科技大学 | Method for preparing asphalt concrete anti-rutting agent for road by in-situ graft modification |
| CN102964525A (en) * | 2012-03-08 | 2013-03-13 | 湖北国创高新材料股份有限公司 | Road asphalt mixture rut resisting additive and preparation method thereof |
| CN103788667A (en) * | 2013-12-25 | 2014-05-14 | 上海浦东路桥建设股份有限公司 | Multicomponent system for improving modulus of asphalt mixture, and application method and modified asphalt thereof |
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