CN105176106B - Composite modified high tenacity asphalt - Google Patents
Composite modified high tenacity asphalt Download PDFInfo
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- CN105176106B CN105176106B CN201510430734.8A CN201510430734A CN105176106B CN 105176106 B CN105176106 B CN 105176106B CN 201510430734 A CN201510430734 A CN 201510430734A CN 105176106 B CN105176106 B CN 105176106B
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- asphalt
- high tenacity
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Abstract
This case provides a kind of composite modified high tenacity asphalt, is made up of following material: matrix pitch, butadiene-styrene rubber, ethylene-vinyl acetate copolymer resin, accelerator, filling oil, cross-linking agent, organic amine；Wherein, the styrene-content in described butadiene-styrene rubber is 30～40wt%, and butadiene-styrene rubber number-average molecular weight is 100000～120000g/mol.This case have studied the impact that Styrene Content in Coplymer and butadiene-styrene rubber number-average molecular weight are elastic on asphalt.Constructed in accordance go out modified asphalt mixture there is excellent performance, there is high-temperature stability, anti-low-temperature cracking ability, high tenacity, also there is excellent construction workability, it is adaptable to the road conditions that the stresses such as heavy duty, overload ratio height, abrupt slope of growing up, urban road intersection, paving steel bridge deck are the severeest.
Description
Technical field
The present invention relates to a kind of modified asphalt material, particularly relate to a kind of composite modified high tenacity Colophonium and mix
Close material.
Background technology
Rut is one of Major Diseases of facing of China's bituminous paving, for a long time, and the most many roads
Researcher is devoted to how to improve the research of asphalt pavement rut disease, and achieves plentiful and substantial and effectively grind
Study carefully achievement, based on one of typical case's measure improving asphalt pavement rut disease that these achievements in research are taked
Be by, the cementitious matter of upper layer asphalt be changed to modified pitch by former plain asphalt.Enter
The research of one step and practice have shown that: the high temperature resistance stability between the compound of different modified asphalt composition is deposited
At notable difference, in heavy traffic section heavily loaded, that overload ratio is high, even if the three of asphalt surface course layers
Conventional SBS modified pitch is all used the most unavoidably to produce rut disease.The generally existence of this phenomenon,
Road and material supplier author is promoted to develop the novel asphalt material being applicable to harsher external condition.
High tenacity Colophonium is exactly a kind of novel asphalt material that can be suitably used for harsh loading condition, as one
Composite modified special multi-modified asphalt, high tenacity Colophonium has excellent strength character and high-temperature stability, suitable
For stress shapes such as heavy duty, overload ratio height, abrupt slope of growing up, urban road intersection, paving steel bridge decks
The road conditions that state is the severeest.
Summary of the invention
For above-mentioned weak point, it is an object of the invention to provide one butadiene-styrene rubber (SBR) and
The high tenacity asphalt that ethylene-vinyl acetate copolymer resin (EVA resin) composite modifier is modified.
By modifying agent is optimized, so that the internal structure of Colophonium can be improved in microcosmic degree, reach to carry
High Colophonium intensity, rutting resistance, high/low temperature stability and the purpose of anti-cracking performance.
Technical scheme is summarized as follows:
A kind of composite modified high tenacity asphalt, including the material of following weight portion:
Wherein, the styrene-content in described butadiene-styrene rubber is 35～45wt%, the equal molecule of butadiene-styrene rubber number
Amount is 100000～120000g/mol.
Preferably, described composite modified high tenacity asphalt, described ethene-vinyl acetate copolymerization
Resin is 4 weight portions.
Preferably, described composite modified high tenacity asphalt, described accelerator is zirconium oxide, oxygen
Change one or a combination set of barium, beryllium oxide.
Preferably, described composite modified high tenacity asphalt, described cross-linking agent be thiamine disulfide,
One or a combination set of 2,2'-dinitro diphenyl disulfide.
Preferably, described composite modified high tenacity asphalt, described organic amine is N-butyl benzene
One or a combination set of amine, diisopropanolamine (DIPA), phthalimide.
Preferably, described composite modified high tenacity asphalt, also include 13～17 weight portions
Polyester ripple is fine.
Preferably, described composite modified high tenacity asphalt, also include phosphorus-containing matter.
Preferably, described composite modified high tenacity asphalt, described phosphorus-containing matter is phosphorous acid
Ester, methylene tri alkyl one or a combination set of are seen.
Preferably, described composite modified high tenacity asphalt, the weight portion of described phosphorus-containing matter
It it is 1～3 part.
The invention has the beneficial effects as follows:
1) employing butadiene-styrene rubber and EVA resin are as modifying agent, under ensureing relatively low production cost, hence it is evident that
Improve high-temperature behavior and the anti-fatigue performance of modified bitumen product；
2) by polystyrene (PS) segment and polybutadiene (PB) segment in research butadiene-styrene rubber to Colophonium
Mechanism of modification, draws best composition ratio, improves high-temperature stability and the low-temperature cracking-resistance of asphaltic products；
3) by introducing organic amine, improve the adhesion of Colophonium, solve what the increase of system viscosity caused
Constructional difficulties；
4) the high tenacity Colophonium using new formula to produce has clear superiority in the indexs such as viscous-elastic behaviour.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, to make those skilled in the art join
Book word can be implemented according to this as directed.
A kind of composite modified asphalt high tenacity compound, including the material of following weight portion:
Wherein, the styrene-content in butadiene-styrene rubber is 35～45wt%, and butadiene-styrene rubber number-average molecular weight is
100000～120000g/mol.
The polybutadiene that in SBR structural formula Middle molecule chain, segmentation is flexible, two ends are firm polystyrene,
SBR is miscible with Colophonium, and wherein polystyrene interconnects with Colophonium, and polybutadiene chain is then around bitumen particle
And bitumen particle is surrounded, due to polystyrene and the polybutadiene incompatibility when room temperature, copolymerization
Polystyrene cohesion energy density between thing Middle molecule chain is relatively big, therefore its two ends are gathered with other the most respectively
Styrene flocks together, and forms the physical crosslinking region of many constraint compositions, but because its block is flexible
Polybutadiene block, be the formation of network structure.Monomer ratio of components in SBR is critically important, when benzene second
Time alkene content is 35～45wt%, polymer solution viscosity diminishes, and hot strength and hardness increase.SBR
Molecular weight performance is had a significant impact, butadiene-styrene rubber number-average molecular weight is 100000～120000g/mol,
Viscosity is big, and adhesive strength is high.
EVA is thermosetting resin, and strand has VAM, can reduce asphalt
Degree of crystallinity, improves pliability, resistance to impact, filler absorption and heat sealability, and EVA is as moulding simultaneously
Material modifying agent, change SBR/ active force, improve processing characteristics so that in modified system
The thickness of boundary increases, stability improves.If EVA addition is less than 3 weight portions, then not enough so that
Obtain the toughness of asphalt, mar proof, resistance to ag(e)ing, high stability and adhesive property finally to obtain
To significantly improving；If the addition of EVA resin is more than 6 weight portions, EVA resin is relatively big due to its viscosity,
Mixture can occur creep to be difficult to disperse in high-speed agitating process, then can increase molten to it of asphalt system
Decompression force, and increase the needle penetration of final asphalt.When EVA resin is 4 weight portion, can be very
Significantly improve thermostability and the low temperature flexibility of Colophonium.
Add cross-linking agent, it is possible to strengthen and occur between polymer modifiers and Colophonium or cross-linking agent and Colophonium
Cross-linking reaction, increases the compatibility between modifying agent and Colophonium, thus improves the performance of modified pitch.Use
Sulfur-containing compound is cross-linking agent, and the compatibility of the modified pitch system of preparation is greatly increased,
High-temperature viscosity, softening point and elastic recovery rate all significantly increase.Add sulfur-bearing when modified pitch to have
Machine thing, finds that the modified effect of the substituted sulfurous organic compound of nitro is best, had both improve the storage of co-mixing system
Stability, improves again cryogenic property and the high-temperature behavior of Colophonium.
Another as this programme improves, and also can additionally add in the basic components in above-mentioned asphalt
Enter polyester glass fibre.Fibergrass polyester mat is that brand-new glass is combined cracking-resistant material, be by 60% glass fibre and
A kind of composite earthwork synthetic material of 40% polyester fiber composition.Being combined as of this uniqueness provides glass
The intensity of fiber and the pliability of polyester fiber.Polyester glass fibre and asphalt have the good compatibility.
Engineering practice shows, polyester glass fibre can effectively prevent pavement crack and bridge floor and road surface Water Damage.
Another as this programme improves, and also can additionally add in the basic components of above-mentioned asphalt
Phosphorus-containing matter.The preferred phosphite ester of phosphorus-containing matter, methylene tri alkyl one or a combination set of are seen.Main
Act on and make the softening point of Colophonium, viscosity, needle penetration and ageing-resistant ability significantly improve, be similar to Colophonium
Mild oxidation, but do not interfere with the brittle point of Colophonium.The addition of phosphorus-containing matter particularly phosphite ester,
Making the high-temperature storage stability of modified pitch system, resistance to permanent deformation, such ability improve, reason is phosphorous have
Machine thing promotes asphalt component to be changed to gel structure by collosol structure, and asphalt content is the biggest, average relative
Molecular mass is the biggest, is more easily formed homogeneous system.It is however noted that, after phosphorus content excess,
G., jelly-like phenomenon can be resulted in.Therefore, phosphorus-containing matter addition must be limited, if phosphorus-containing matter
Addition less than 1 weight portion, then asphalt component cannot be promoted to be changed to gel structure by collosol structure；
If the addition of phosphorus-containing matter is more than 3 weight portions, then the meeting easily causing emulsified asphalt produces g., jelly-like now
As, cause certain waste.
Following table lists some concrete comparative example and embodiments:
Following table is comparative example 1～4 and the performance test results of embodiment 1～6:
Testing result from upper table is it can be seen that the composite modified high-strength Asphalt Penetration of the application is obvious
Relatively low, belong to harder asphalt material, and its viscosity is less than the modified pitch in comparative example, particularly 60 DEG C
Dynamic viscosity be about contrast modified pitch 1/3.As can be seen here, high-strength Colophonium have preferably construction and
Yi Xing；High-strength Colophonium has bigger viscous toughness and toughness, shows bigger mechanical strength；High-strength drip
Rutting parameter G under the conditions of blue or green 60 DEG C*/ sin δ is about 4 times of modified pitch in comparative example, shows very
Good high-temperature stability.
Although embodiment of the present invention are disclosed as above, but it is not restricted to description and embodiment party
Listed utilization in formula.It can be applied to various applicable the field of the invention completely.For being familiar with ability
For the personnel in territory, it is easily achieved other amendment.Therefore without departing substantially from claim and etc. homotype
Enclosing under limited general concept, the present invention is not limited to specific details.
Claims (6)
1. a composite modified high tenacity asphalt, including the material of following weight portion:
Wherein, the styrene-content in described butadiene-styrene rubber is 35～45wt%, the equal molecule of butadiene-styrene rubber number
Amount is 100000～120000g/mol；
Described accelerator is one or a combination set of zirconium oxide, Barium monoxide, beryllium oxide；
Described cross-linking agent is one or a combination set of thiamine disulfide, 2,2'-dinitro diphenyl disulfide；
Described organic amine is one or a combination set of N-butylaniline, diisopropanolamine (DIPA), phthalimide.
Composite modified high tenacity asphalt the most as claimed in claim 1, it is characterised in that: described
Ethylene-vinyl acetate copolymer resin is 4 weight portions.
Composite modified high tenacity asphalt the most as claimed in claim 1, it is characterised in that: also wrap
Include the polyester glass fibre of 13～17 weight portions.
Composite modified high tenacity asphalt the most as claimed in claim 1, also includes phosphorus-containing matter.
Composite modified high tenacity asphalt the most as claimed in claim 4, it is characterised in that: described
Phosphorus-containing matter is one or a combination set of phosphite ester, methylene trihydrocarbyl phosphine.
6. the composite modified high tenacity asphalt as described in claim 4 or 5, it is characterised in that:
Described phosphorus-containing matter is 1～3 weight portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430734.8A CN105176106B (en) | 2015-07-21 | 2015-07-21 | Composite modified high tenacity asphalt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430734.8A CN105176106B (en) | 2015-07-21 | 2015-07-21 | Composite modified high tenacity asphalt |
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| CN105176106A CN105176106A (en) | 2015-12-23 |
| CN105176106B true CN105176106B (en) | 2016-08-24 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107011691A (en) * | 2017-05-18 | 2017-08-04 | 内蒙古高远工程科技发展有限公司 | A kind of modified pitch with good anti-rut behavior and preparation method thereof |
| CN114806194B (en) * | 2022-03-17 | 2023-02-21 | 山东汇达新型建筑材料有限公司 | Low-temperature high-viscosity modified asphalt and processing technology thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1995146A (en) * | 2006-01-04 | 2007-07-11 | 同济大学 | Composite modified asphalt material for improving low-temperature ductility |
| CN104212188A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Casting type mixture asphalt material and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8198350B2 (en) * | 2010-02-11 | 2012-06-12 | Icl Performance Products, Lp | Polymer-modified asphalt with a crosslinking agent and methods of preparing |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1995146A (en) * | 2006-01-04 | 2007-07-11 | 同济大学 | Composite modified asphalt material for improving low-temperature ductility |
| CN104212188A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Casting type mixture asphalt material and preparation method thereof |
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| CN105176106A (en) | 2015-12-23 |
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Denomination of invention: Composite modified high toughness asphalt mixture Effective date of registration: 20210913 Granted publication date: 20160824 Pledgee: Nanjing Bank Co.,Ltd. Nanjing Financial City Branch Pledgor: NANJING ROAD KEEPER TECHNOLOGY Co.,Ltd. Registration number: Y2021980009263 |
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Date of cancellation: 20230815 Granted publication date: 20160824 Pledgee: Nanjing Bank Co.,Ltd. Nanjing Financial City Branch Pledgor: NANJING ROAD KEEPER TECHNOLOGY Co.,Ltd. Registration number: Y2021980009263 |