CN1089349C - Method for preparing polymer modified asphalt - Google Patents
Method for preparing polymer modified asphalt Download PDFInfo
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- CN1089349C CN1089349C CN99116033A CN99116033A CN1089349C CN 1089349 C CN1089349 C CN 1089349C CN 99116033 A CN99116033 A CN 99116033A CN 99116033 A CN99116033 A CN 99116033A CN 1089349 C CN1089349 C CN 1089349C
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Abstract
The present invention provides a method for preparing polymer modified asphalt. The method improves the compatibility of the polymer in the asphalt, decreases the temperature sensitivity of the asphalt, selects a rubber mixing machine with high shearing force to prefabricate modified master batch containing a small quantity of asphalt, and thus, the problem of difficult uniform mixing of the asphalt and the polymer is solved. The modified master batch is prepared from 100 portions by weight of polymer, 100 to 200 portions by weight of asphalt, 5 to 50 portions by weight of aromatic resin, 2 to 20 portions by weight of black carbon, and 0 to 1 portion by weight of antiageing agent, wherein 100 portions by weight of asphalt heated to 155 to 160 DEG C and 8 to 40 portions by weight of modified master batch are simultaneously placed in a stirring device to be mixed, and thus, the modified asphalt is prepared. The modified asphalt prepared by the method has no softening in summer and no crack in winter, and the movable stability on roads is high. The present invention has the advantages of low energy consumption and convenient operation in the production process.
Description
The present invention relates to a kind of method of modifying of bitumen for road use, refer to particularly a kind of polymer modifiers be added in the pitch, make bituminous concrete pavement have the modified asphalt preparation method of performances such as good penetration degree, ductility, softening temperature.
For making bituminous concrete pavement have good performance, all applied researcies on road of countries in the world in the modification of setting about pavement asphalt and modifying asphalt.Since the nineties with " U.S. strategy highway plan " be representative the bituminous material study on the modification is formed unprecedented upsurge.Various countries have proposed many modified asphalt technologies, and what form commodity so far just has a kind more than 40.With equipment is the then successful with Austrian Novophalt modified asphalt technology of core, discloses PE, SBS according to " highway " 1994. № .7.P44-48 " application of polyethylene modified asphalt on the motorway of the Capital Airport " and has made properties-correcting agent and properties-correcting agent addition manner and the preparation equipment that modifying asphalt adopted; Because this technology adopts Austrian Richard. the colloidal mill of the band warming apparatus of company of Fil Singh global group, adopt agitator though overcome the preparation modifying asphalt, the long-time defective that stirs under high-temperature has solved the mixed uniformly problem of pitch and polymkeric substance.But this report explanation will make and polymer-modifiedly disperse equably and be distributed in the pitch with fine particle, and all pitches all will pass through colloidal mill, causes energy consumption height, time long, so that the manufacturing cost costliness; In addition, facility investment is big, and needs import.
Modifier A PAO (abbreviation of Amorphous Poly Alpha Olefin) is disclosed in the literary composition of " highway " 1997. № .4.P27～33 " experimental study of APAO modifying asphalt ".A kind of new APAO product that certain chemical company of Japan produces, Beijing company sells, it is a kind of amorphous alpha-olefin, it utilizes special catalyst, the lower amorphous olefin polymer of molecular weight that propylene monomer or propylene and ethene or propylene and butene-1 copolymerization are formed.APAO properties-correcting agent, building-up process is numerous and diverse, and needs import.
The objective of the invention is to overcome the deficiencies in the prior art part,, improve the consistency of polymkeric substance in pitch, reduce the bituminous temperature sensitivity by development properties-correcting agent; Utilize the prefabricated modified master of equipment advantage of relevant art simultaneously, then itself and pitch blended are operated step by step, overcome polymericular weight height in the composition, viscosity is big and pitch is difficult to reach mixed uniformly problem; Thereby provide a kind of substep process period short, temperature is low, mixing of materials is even and energy consumption is low, easy and simple to handle, modifying asphalt ductility, penetration degree reach pitch No. 60, the preparation method of the polymer modified asphalt that softening temperature is then higher than the listed standard of SH0522-92.
Purpose of the present invention realizes by following measure:
A kind of preparation method of polymer modified asphalt, it adopts the mode of polymer blending, selects the prefabricated modified master of rubber rubber mixing machine of high shear force for use, divides one-step preparation method with modified master and pitch blended again, and this method step and processing condition thereof are as follows:
Step 1: the preparation of modified master
(A) properties-correcting agent proportioning
In polymkeric substance 100 weight parts is benchmark
Polymkeric substance 100 weight parts
Pitch 100～200 weight parts
Aromatic series tackifying resin 5～50 weight parts
Hard(carbon)black 2～20 weight parts
Anti-aging agent 0～1 weight part
(B) by (A) proportioning each component is dropped into blend in the rubber rubber mixing machine (comprising open, sealed and the spiral mixing roll),
Blending temperature: 70～120 ℃
The blend time: 10～20min
Blend requires: be mixed to the particle that is invisible to the naked eye
After granulation or the section of cooling thin-pass is modified master, packages spare;
Step 2: the preparation of modifying asphalt
(A) feed ratio
Pitch 100 weight parts
Modified master 8～40 weight parts
(B) by (A) ratio of components, place whipping appts to mix simultaneously with modified master the pitch of heating to 155～160 ℃, time 8～15min (should decide with charging capacity) promptly gets polymer modified asphalt.
Polymkeric substance can be polyethylene (PE), thermoplastic elastomer (SBS), polyethylene (PE)/thermoplastic elastomer (SBS) or polyethylene (PE)/styrene-butadiene rubber(SBR) (SBR); The aromatic series tackifying resin can be terpine resin or cumarone resin or Resins, epoxy, and anti-aging agent can be anti-old A or antioxidant 4010.
The rationale of aforesaid method mainly is: because pitch mainly is made of three kinds of components, be asphaltene, resin, oil, the method of polymer blending can make the polymkeric substance swelling in oil as properties-correcting agent, because the interface interaction between polymkeric substance and the asphaltene, polymkeric substance and pitch can not be separated.Be dissolved in similar principle according to similar, when making modified master, add part pitch, under high shear, easily mix, again this bitumeniferous modified master is added in the unmodified pitch, thereby polymkeric substance and other additive that modification uses disperseed together equably, thus give full play to the effect of properties-correcting agent, reach the purpose of performances such as improving softening temperature, penetration degree, ductility.Add tackifier in the prescription, can improve paraffinicity height in the crude oil in China pitch, be unfavorable for and sand, stone adherent defective.
The present invention compared with prior art has following advantage:
1, compare with APAO, the modified master that the present invention makes is the mixture of a kind of bituminous, polymkeric substance, tackifier, strengthening agent, anti-aging agent.Because bituminous in the modified master, the pitch in the modified master are easy to mix mutually with a large amount of pitch, simultaneously, related other component is evenly disperseed together fast, thereby obtains the uniform modifying asphalt of quality.
2, aromatic series tackifier in the modified master prescription improve paraffinicity height in the crude oil in China pitch, are unfavorable for and sand, stone adherent defective.
3, the prefabricated modified master of rubber rubber mixing machine of the high shear force of intention employing first together with the blend of a small amount of pitch, adds all property-modifying additives in a large amount of pitches again.Polymkeric substance is the fine particles shape and distributes (under 100 times of opticmicroscopes, can't see any particle) in pitch, thereby has improved the consistency between them.
4, because the increasing of the consistency between pitch and the properties-correcting agent, changed the bituminous viscoelastic property, and the bituminous temperature sensitivity is reduced, so the modifying asphalt of the present invention's production, reaching the summer when using on road does not feel like jelly (not going out phenomenons such as rut, wave are passed, sticking wheel), and the winter does not chap.
The performance of modified bitumen of embodiment and Comparative Examples is as shown in table 1.
5, do not need required heavy equipment in the Austrian Navophalt technology.
6, service temperature low (only being 155～160 ℃) prevents that effectively polymkeric substance and bituminous are aging, protection pitch and polymer molecular structure.
7, technology of the present invention is simple, and is easy and simple to handle, and few, the convenient transportation of prefabricated modified master materials can directly be pressed plain asphalt compound production method on construction ground and mix with mineral aggregate.Tally with the national condition, easily apply, have good economic benefit and social benefit.
Will the invention will be further described by following embodiment and Comparative Examples.
Embodiment 1
A kind of preparation method of polymer modified asphalt may further comprise the steps and processing condition:
Step 1: the preparation of modified master
(A) properties-correcting agent proportioning
Three block thermoplastic elastomers (SBS), 100 weight parts
Pitch 200 weight parts
Terpine resin 35 weight parts
Carbon black 20 weight parts
Anti-aging agent 0 weight part
(B) by (A) proportioning each component (gross weight 710g) is dropped into blend in 6 o'clock rubber rubber mixing machines, 120～130 ℃ of its blending temperatures (are mixed to till the particle that is invisible to the naked eye) about blend time 15min, and compound is a modified master after the section of cooling thin-pass;
Step 2: the preparation of modifying asphalt
(A) feed ratio
Pitch 100 weight parts
Modified master 28 weight parts
By (A) feed ratio, place whipping appts to mix simultaneously with modified master the pitch of heating to 155～160 ℃, mixing time is about 8 minutes, gets the uniform modifying asphalt of quality.
Embodiment 2
A kind of preparation method of polymer modified asphalt may further comprise the steps and processing condition:
Step 1: the preparation of modified master
A, properties-correcting agent proportioning
Polyethylene 70 weight parts
Styrene-butadiene rubber(SBR) 30 weight parts
Pitch 100 weight parts
Terpine resin 10 weight parts
Carbon black 10 weight parts
Antioxidant A or antioxidant 4010 1 weight part
B, by (A) proportioning each component (gross weight 442g) is dropped into blend in 6 o'clock rubber rubber mixing machines, 110 ℃ of its blending temperatures (are mixed to till the particle that is invisible to the naked eye) about blend time 10min, and cooling thin-pass section back is a modified master;
Step 2: the preparation of modifying asphalt
A, feed ratio
Pitch 100 weight parts
Modified master 18 weight parts
By (A) feed ratio, place whipping appts to mix simultaneously with modified master the pitch of heating to 155～160 ℃, mixing time is 8 minutes, gets the uniform modifying asphalt of quality.
Comparative Examples 1:
The production method of Capital Airport Expressway Modified Bitumen:
With dewatering and heating, adopt Austrian Richard to 130 ℃ pitch. the asphalt mixing plant of company of Fil Singh global group, PE and SBS are disperseed, are mixed in the pitch equably and go, deliver to the bituminous concrete agitator kettle again.The throughput of this equipment is 7t/h, and whipping device has the storage power of 10t, so can be with using with producing (taking passages from " highway " magazine 1994 the 7th, P44～48).
Comparative Examples 2;
APAO modified asphalt manufacturing method:
1, pitch is injected the modifying asphalt jar, utilize heat-conducting oil heating to 165 ℃ ± 5 ℃;
2, stir on APAO 8% limit, on one side with manually dropping into APAO properties-correcting agent;
3, stir speed (S.S.) 8～12 commentaries on classics/min, keep 30min:
4, modifying asphalt is directly sent into amalgamator and used (this operation is about to pitch and mixes with sand, stone, concrete) for mixing and stirring pitch;
5, treat that one jar of modifying asphalt uses up after, repeat above step again, continue to make APAO modifying asphalt (take passages from the 4th phase of " highway " magazine 1997 P.27～33).
Table one:
| Performance | Comparative Examples 1 | Comparative Examples 2 | The present invention | ||||
| Former state | The modification sample | Former state | The modification sample | Former state | Embodiment 1 | Embodiment 2 | |
| Penetration degree (25 ℃, 100g, 5S) 0.1mm | 85～95 | 40～50 | 71.3 | 63.6 | 82 | 29 | 72 |
| Softening temperature (℃) | 47～49 | 67～73 | 44.3 | 51.8 | 47 | 75 | 70 |
| Ductility (25 ℃, 5cm/min) cm | ＞150 | 26～52 | ＞105 | 22.3 | ＞100 | 40 | 82 |
Annotate:
(1) test data of Comparative Examples 1 draw from the 7th phase of " highway " magazine 1994 P.45;
(2) test data of Comparative Examples 2 is drawn from the 4th phase of " highway " magazine 1997 P.28 (ductility 15 ℃ down test);
(3) test data of embodiment 1,2 is tested by the Guangdong Province Transport Science Research Institute.
Claims (2)
1, a kind of preparation method of polymer modified asphalt, the mode that it is characterized in that its employing polymer blending, select the prefabricated modified master of rubber rubber mixing machine of high shear force for use, divide one-step preparation method with modified master and pitch blended again, this method step and processing condition thereof are as follows:
Step 1: the preparation of modified master
(A) properties-correcting agent proportioning
In polymkeric substance 100 weight parts is benchmark
Polymkeric substance 100 weight parts
Pitch 100～200 weight parts
Aromatic series tackifying resin 5～50 weight parts
Hard(carbon)black 2～20 weight parts
Anti-aging agent 0～1 weight part
(B) by (A) proportioning each component is dropped into blend in the rubber rubber mixing machine,
70～120 ℃ of blending temperatures
10～20 minutes blend time
Blend requires: be mixed to the particle that is invisible to the naked eye
Then or cooling thin-pass section, or after granulation, be modified master, package spare;
Step 2: the preparation of modifying asphalt
(A) feed ratio
Pitch 100 weight parts
Modified master 8～40 weight parts
(B) by (A) ratio of components, place whipping appts to mix simultaneously with modified master the pitch of heating, 8～15 minutes time, promptly get polymer modified asphalt to 155～160 ℃.
2, the preparation method of a kind of polymer modified asphalt according to claim 1, it is characterized in that polymkeric substance is polyethylene, thermoplastic elastomer, polyethylene/thermoplastic elastomer, or polyethylene/styrene-butadiene rubber(SBR), the aromatic series tackifying resin is terpine resin or cumarone resin or Resins, epoxy; Anti-aging agent is anti-old A or antioxidant 4010.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99116033A CN1089349C (en) | 1999-01-28 | 1999-01-28 | Method for preparing polymer modified asphalt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99116033A CN1089349C (en) | 1999-01-28 | 1999-01-28 | Method for preparing polymer modified asphalt |
Publications (2)
| Publication Number | Publication Date |
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| CN1228456A CN1228456A (en) | 1999-09-15 |
| CN1089349C true CN1089349C (en) | 2002-08-21 |
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| CN99116033A Expired - Fee Related CN1089349C (en) | 1999-01-28 | 1999-01-28 | Method for preparing polymer modified asphalt |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100655635B1 (en) * | 2005-06-07 | 2006-12-08 | 금호석유화학 주식회사 | Asphalt modifier enhancing viscosity for drainage pavement and its preparation method |
| CN101307156B (en) * | 2008-07-11 | 2011-02-16 | 长安大学 | Ageing resistance composite modifying agent for bitumen for road use |
| CN101885870B (en) * | 2010-08-11 | 2012-10-10 | 陕西长大博源公路养护科技有限公司 | High-viscosity thin-layer bituminous mixture modifier and application thereof |
| CN103881403B (en) * | 2014-03-18 | 2016-05-11 | 武汉理工大学 | A kind of ultraviolet-resistant fix-bitumen and preparation and application |
| CN105733278A (en) * | 2014-12-11 | 2016-07-06 | 中国石油天然气股份有限公司 | Preparation method of flame-retarding asphalt |
| CN109439002A (en) * | 2018-10-23 | 2019-03-08 | 浙江威克新材料科技发展有限公司 | High target SBS modified pitch preparation process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048867A (en) * | 1990-07-19 | 1991-01-30 | 同济大学 | The manufacture method of composite modified asphalt |
| CN1121939A (en) * | 1995-04-20 | 1996-05-08 | 武汉工业大学 | Modified asphalt material for pavement and preparation process thereof |
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- 1999-01-28 CN CN99116033A patent/CN1089349C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048867A (en) * | 1990-07-19 | 1991-01-30 | 同济大学 | The manufacture method of composite modified asphalt |
| CN1121939A (en) * | 1995-04-20 | 1996-05-08 | 武汉工业大学 | Modified asphalt material for pavement and preparation process thereof |
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| CN1228456A (en) | 1999-09-15 |
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