CN1448440A - Modified road asphalt and its prep. - Google Patents
Modified road asphalt and its prep. Download PDFInfo
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- CN1448440A CN1448440A CN 03113237 CN03113237A CN1448440A CN 1448440 A CN1448440 A CN 1448440A CN 03113237 CN03113237 CN 03113237 CN 03113237 A CN03113237 A CN 03113237A CN 1448440 A CN1448440 A CN 1448440A
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- styrene
- asphalt
- ethylene
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- modifying asphalt
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Abstract
The present invention is polymer modified road asphalt suitable for heavy traffic, high speed and city road and its preparation process. The styrene-ethylene-butene-styrene block copolymer as modifier is added into asphalt with the added amount being 3-6 wt% of modified asphast. During the preparation, the modifier and asphalt are heated to 160-180 deg.c and high speed shorn for 30-50 min to form the modified asphalt with the netted structure of styrene-ethylene-butene-styrene block copolymer. The modified road asphalt has superior antiaging and uvioresistant performance and long service life.
Description
One, technical field
The present invention relates to adopt a kind of polymer modification road bitumen that is applicable to heavy traffic, high speed and urban road surfaces and preparation method thereof.
Two, background technology
When production both at home and abroad at present and use modifying asphalt, the overwhelming majority is all by selecting suitable polymers properties-correcting agent to realize, to improve bituminous high-temperature stability and low-temperature cracking-resistance.Main properties-correcting agent has thermoplastic elastomer, rubber-like and type thermoplastic resin, and they have different modified effects to pitch.In recent years, after styrene-butadiene-styrene (SBS) properties-correcting agent is used, can obtain the modifying asphalt of high temperature performance preferably in modifying asphalt, become main asphalt modifier product.But it is poor that SBS also exists with the matrix pitch consistency, the shortcoming of SBS modifying asphalt poor stability, and because the B segment among the SBS has more two keys and chemical property is very active, relatively poor to the ageing resistance of oxygen, ozone and UV-light.
Three, summary of the invention 1, technical problem
The purpose of this invention is to provide a kind of existing properties-correcting agent insufficient modified pavement asphalt aspect modifying asphalt physicals and anti-aging, uvioresistant and preparation method thereof that overcomes, be applied to the production that heat is mixed modifying asphalt.2, technical scheme
Modified pavement asphalt of the present invention adopts styrene-ethylene-butylene-styrene segmented copolymer (SEBS) to join in the pitch as properties-correcting agent, and wherein the weight of properties-correcting agent styrene-ethylene-butylene-styrene segmented copolymer accounts for 3～6% of mixed modifying asphalt.
The preparation method of modified pavement asphalt of the present invention is that high speed shear formed the cancellated modifying asphalt of styrene-ethylene-butylene-styrene segmented copolymer in 30～50 minutes to 160 ℃～180 ℃ the situation heating with block copolymer-modified dose of the styrene-ethylene-butylene-styrene that accounts for modifying asphalt gross weight 3～6% and pitch.3, beneficial effect
Use the modifying asphalt of this properties-correcting agent and modified formula production not only to have the better physical performance, also have advantages such as anti-aging, that life cycle is long.Physicals is as follows after its modification:
Matrix drop SBS changes SEBS and changes matrix drop SBS and change SEBS and change
Technical indicator
Blue or green 2 property pitch pitch penetration degree/10 of blue or green 1 property pitch pitch
-1Mm
5℃ 7 7 9 9 12 13
25℃ 79 60 61 85 71 74
35℃ 185 127 119 178 139 140
PI-1.20-0.420 0.350-0.625 0.732 0.931 softening temperature/℃ 49 56.5 59 47 59 60.5 ductilities/cm
25℃ ＞120 89 ＞120 ＞120 ＞120 ＞120
5 ℃ of 5.7 21 28 11 34 42 segregation experiment/℃-3 2---25 ℃ of recovery of elasticity/% 12 62 60 5 61 60
1, SEBS is a kind of novel block polymer, is used as asphalt modifier and can obtains mechanical property preferably, and the PI of 4%SEBS modifying asphalt brings up to 0.35; Softening temperature is brought up to 59 ℃; 5 ℃ of ductilities have also reached 28cm.This is because the vinylbenzene segment (S) of SEBS at two ends, flocks together respectively, forms the physical crosslinking zone, and polyethylene, polybutene-1 and a part of unsaturated polybutadiene segments (EB) then form soft section, present snappiness.SEBS forms a kind of tridimensional network by the gathering of polystyrene block, and it is dispersed in the pitch, and polystyrene end gives material enough intensity, and mid-block makes multipolymer have good especially elasticity again.
2, with reference to the technical requirements (JTJ 036-98 shows 5.2.1) of national SBS modifying asphalt, the performance of SEBS modifying asphalt can reach between I-B and the I-C, and overall performance is significantly better than the performance of correlated SBS modifying asphalt.This is because SEBS not only has the premium properties of segmented copolymer, and in the SEBS multipolymer in different segments and the pitch light component have different consistencies, easier formation polymer network has improved the over-all properties of modifying asphalt.
3, SEBS has excellent anti-ozone, resistance to oxidation, UV resistant, wear resistance and outdoor weather resistance, when on highway, using, can reduce the aging modifying asphalt Problem of Failure that causes of properties-correcting agent, the work-ing life of improving modified asphalt concrete, the cost of minimizing highway maintenance.
Four, embodiment
These problems at the existence of SBS modifying asphalt, further improve the work-ing life of highway pavement, reduce maintenance cost, the present invention proposes to adopt the new approaches of a kind of novel block polymkeric substance SEBS (styrene-ethylene-butylene-styrene segmented copolymer) modifying asphalt, and has proposed modifying asphalt prescription and processing parameter.Promptly adopt the styrene-ethylene-butylene-styrene segmented copolymer to join in the pitch as properties-correcting agent, wherein the weight of properties-correcting agent styrene-ethylene-butylene-styrene segmented copolymer accounts for 3～6% of mixed modifying asphalt.The preparation method for block copolymer-modified dose of the styrene-ethylene-butylene-styrene that will account for modifying asphalt gross weight 3～6% and pitch at the cancellated modifying asphalt of high speed shear formation in 30～50 minutes styrene-ethylene-butylene-styrene segmented copolymer to 160 ℃～180 ℃ the situation of heating.
Detailed process at first is the selection of SEBS properties-correcting agent, and the present invention uses the SEBS properties-correcting agent that meets following index at home first:
Project SEBS performance index molecular weight (15-23) * 10
4Tensile strength MPa 27-38300% stress at definite elongation % 700-900 unit elongation % 500-750 density kg/m
3900-920 brookfield viscosity Ns/m
24-50
[1]Melting index g/10min 0.5-5
[2]Plasticizing oil content w% 0 block is than styrene/rubber 25/70-40/60 hardness (10s) Shao Er A degree＞60
[3]The outward appearance powdery
Annotate: [1], 25% straight polymer toluene solution, 25 ℃;
[2]、230℃，5kg；
[3]、150℃。The following SEBS modifier content of main technique operating parameters (%) high speed shear time (Min) the high speed shear temperature that the SEBS modifying asphalt is produced (℃)
3-6 30-50 160-180
When the present invention produces modifying asphalt in industrial application, adopt existing SBS modifying asphalt to produce identical high-speed shearing equipment (colloidal mill etc.) and other production unit, form the cancellated modifying asphalt of SEBS by abundant high speed shear.
Claims (2)
1, a kind of modified pavement asphalt, it is characterized in that adopting the styrene-ethylene-butylene-styrene segmented copolymer to join in the pitch as properties-correcting agent, wherein the weight of properties-correcting agent styrene-ethylene-butylene-styrene segmented copolymer accounts for 3～6% of mixed modifying asphalt.
2, a kind of preparation method of modified pavement asphalt is characterized in that high speed shear formed the cancellated modifying asphalt of styrene-ethylene-butylene-styrene segmented copolymer in 30～50 minutes to 160 ℃～180 ℃ the situation heating with block copolymer-modified dose of the styrene-ethylene-butylene-styrene that accounts for modifying asphalt gross weight 3～6% and pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03113237 CN1448440A (en) | 2003-04-21 | 2003-04-21 | Modified road asphalt and its prep. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03113237 CN1448440A (en) | 2003-04-21 | 2003-04-21 | Modified road asphalt and its prep. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1448440A true CN1448440A (en) | 2003-10-15 |
Family
ID=28684023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03113237 Pending CN1448440A (en) | 2003-04-21 | 2003-04-21 | Modified road asphalt and its prep. |
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| CN (1) | CN1448440A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100523090C (en) * | 2005-12-29 | 2009-08-05 | 同济大学 | High viscosity composite modified asphalt for OGFC and preparation method thereof |
| CN101280114B (en) * | 2008-05-15 | 2011-05-11 | 上海浦东路桥沥青材料有限公司 | SBS modified road asphalt, production method and device thereof |
| CN105860413A (en) * | 2016-05-05 | 2016-08-17 | 成都易胜科生物科技有限公司 | Preparation method of modified additive for road surface asphalt |
| CN106497104A (en) * | 2016-11-11 | 2017-03-15 | 孙霞 | Emulsified modified asphalt and preparation method thereof |
| CN113135692A (en) * | 2020-07-31 | 2021-07-20 | 车春花 | Preparation method of anti-aging modified asphalt concrete |
-
2003
- 2003-04-21 CN CN 03113237 patent/CN1448440A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100523090C (en) * | 2005-12-29 | 2009-08-05 | 同济大学 | High viscosity composite modified asphalt for OGFC and preparation method thereof |
| CN101280114B (en) * | 2008-05-15 | 2011-05-11 | 上海浦东路桥沥青材料有限公司 | SBS modified road asphalt, production method and device thereof |
| CN105860413A (en) * | 2016-05-05 | 2016-08-17 | 成都易胜科生物科技有限公司 | Preparation method of modified additive for road surface asphalt |
| CN106497104A (en) * | 2016-11-11 | 2017-03-15 | 孙霞 | Emulsified modified asphalt and preparation method thereof |
| CN106497104B (en) * | 2016-11-11 | 2019-08-23 | 上海雁岛实业有限公司 | Emulsified modified asphalt and preparation method thereof |
| CN113135692A (en) * | 2020-07-31 | 2021-07-20 | 车春花 | Preparation method of anti-aging modified asphalt concrete |
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