CN101671143B - SBS modified asphalt and preparation method thereof - Google Patents
SBS modified asphalt and preparation method thereof Download PDFInfo
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- CN101671143B CN101671143B CN2008101413114A CN200810141311A CN101671143B CN 101671143 B CN101671143 B CN 101671143B CN 2008101413114 A CN2008101413114 A CN 2008101413114A CN 200810141311 A CN200810141311 A CN 200810141311A CN 101671143 B CN101671143 B CN 101671143B
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- sbs
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- asphalt
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- stablizer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides an SBS modified asphalt, which is prepared from asphalt, a starlike SBS, a ductility improver and a stabilizing agent, wherein the usage of the starlike SBS is 2.5 to 5 percent of that of the asphalt; the dosage of the ductility improver is 1.0 to 5.0 percent of that of the asphalt; the dosage of the stabilizing agent is 0.5 to 2.0 percent of that of the asphalt; the ductility improver is prepared by stirring rubber softening oil and diethyl phthalate for 0.5 to 1.5 hours at the temperature of between 120 and 140 DEG C; and the stabilizing agent is prepared by stirring an accelerant, namely tetramethyl thiuram monosulfide, and an antioxidant for 0.5 to 1 hour at the temperature of between 65 and 75 DEG C. The asphalt product prepared by the invention has the characteristics of high softening point, great ductility, wide temperature range of application and large elastic restitution, can improve the high temperature anti-deforming capability and the low temperature anti-cracking and fatigue resisting capabilities of a road surface remarkably, and simultaneously improves the temperature stability, the water stability and the durability of the road surface effectively.
Description
Technical field
The invention belongs to field of bitumen technology, relate to a kind of SBS modifying asphalt, relate to this bituminous preparation method simultaneously.
Background technology
It is the requirement of the development of modern road traffic to bituminous pavement that pitch is carried out modification, the highroad particularly characteristics of high-grade highway is that the volume of traffic is big, weight-carrying capacity is big and the speed of a motor vehicle is fast, this just proposes more and more higher specification of quality to pitch, common pitch is difficult to reach requirement, therefore just must carry out modification to pitch.Modifying asphalt mainly is made up of properties-correcting agent and matrix pitch, and properties-correcting agent commonly used has styrene-butadiene-styrene thermoplastic elastomer (SBS), styrene-butadiene rubber(SBR) (SBR), polyethylene (PE) and other kind properties-correcting agent.Because styrene-butadiene-styrene thermoplastic elastomer (SBS) can improve the bituminous high temperature performance simultaneously with the characteristic of rubber-like and resene properties-correcting agent, significantly improves the bituminous pavement performance, prolong the work-ing life on road surface.Therefore, SBS is a kind of rising properties-correcting agent, generally adopts SBS to prepare modifying asphalt as properties-correcting agent at present both at home and abroad, and its consumption accounts for about 65% of properties-correcting agent total amount.
Along with being extensive use of of SBS modifying asphalt, requirement to the SBS modifying asphalt is also more and more higher, be mainly reflected in and require the SBS modifying asphalt that good storage stability is arranged, (most high-grade highway engine requests are higher than more than 60 ℃ higher softening temperature, a lot of engine request softening temperatures are higher than 70 ℃, even the part engine request is higher than 80 ℃), good low-temperature ductility (5 ℃ of ductilities after code requirement is aging are greater than 15cm, and a lot of engine requests are greater than 20cm).In addition, also require 135 ℃ of viscosity of SBS modifying asphalt low more good more, be beneficial to construction.But the softening temperature of existing SBS modifying asphalt and aging effect can't meet the demands, and the production cost height of existing SBS modifying asphalt.
Summary of the invention
The purpose of this invention is to provide a kind of softening temperature height, SBS modifying asphalt that ductility is big.
Another object of the present invention provides this bituminous preparation method.
For achieving the above object, the present invention is by the following technical solutions: a kind of SBS modifying asphalt, by pitch, star shaped SBS, increase and prolong agent and stablizer is made, the star shaped SBS consumption is 2.5～5% of an asphalt content, increasing and prolonging the agent consumption is 1.0～5.0% of asphalt content, stabilizing agent dosage is 0.5 of asphalt content～2.0 ‰, describedly increase that to prolong agent be to be stirred down at 120～140 ℃ by rubber softening oil and Phthalic acid, diallyl ester to be prepared from 0.5～1.5 hour, described stablizer be the promotor TBTM tetrabutyl thiuram monosulfide with oxidation inhibitor 65～75 ℃ down stirrings be prepared from 0.5～1 hour.
Described oxidation inhibitor is antioxidant 1076.
The SBS modified asphalt preparation method may further comprise the steps: (1) preparation increases prolongs agent, and rubber softening oil is mixed with Phthalic acid, diallyl ester, stirs 0.5～1.5 hour promptly down at 120～140 ℃ then; (2) the preparation stablizer mixes the promotor TBTM tetrabutyl thiuram monosulfide with oxidation inhibitor, under 65～75 ℃, stirred 0.5～1 hour then; (3) preparation SBS modifying asphalt, pitch is heated to 165～180 ℃, after the pitch dissolving increasing of star shaped SBS and step (1) preparation being prolonged agent adds, star shaped SBS prolongs the agent dissolving after colloidal mill grinds or high speed shear with increasing, stirred then 2～3 hours, the stablizer that adds step (2) preparation again, continue to stir 2～4 hours.
Described oxidation inhibitor is antioxidant 1076.
The advantage that the present invention had:
1, the present invention prepared increases and prolongs agent and can make stablizer, star shaped SBS and pitch reaction more abundant, and speed of response is fast, and the high temperature ageing time is short; Can make star shaped SBS form even, stable space three-dimensional reticulated structure system in pitch, star shaped SBS and bituminous compatibility are good, are difficult for producing segregation, steady quality;
2, contain oxidation inhibitor in the stablizer of the present invention preparation, ageing resistance is good, and is little to the ductility influence during production, and this stablizer has good preservation stability, can store more than 2 years, and emanate little (≤1.8 ℃) are convenient to standing storage and use;
3, product softening temperature height, generally more than 70 ℃, viscosity is big, has the good high-temperature stability, can resist rut effectively, pass, gathers around pavement diseases such as bag;
4, agent is prolonged in increasing that the present invention prepared, and can make the bituminous ductility increase (5 ℃ of ductility 35～50cm, 5 ℃ of ductilities of TFOT (or RTFOT) back residue〉25cm), has good low-temperature performance, can significantly improve the anti-cold cracking performance on road surface;
5, product recovery of elasticity big (recovery of elasticity〉90%) has good sticking toughness and elasticity, can significantly improve the permanent deformation resistance and the fatigue lifetime on road surface;
6, the product adhesion performance is good, has good anti-water stripping performance, can effectively improve the water stability on road surface, reduces the generation of pavement diseases such as frost boiling, loose, hole groove;
7, product broad application temperature range can significantly reduce the susceptibility to temperature, and promptly low-temperature flexibility is not crisp, and high temperature is sticking tough not soft, thereby significantly improves the temperature stability on road surface.
The prepared SBS modifying asphalt of the present invention has that softening temperature height, ductility are big, broad application temperature range and the big characteristics of recovery of elasticity, also has good preservation stability, can improve anti-deforming ability, low temperature cracking resistance and the anti-fatigue ability on road surface significantly, simultaneously can also improve temperature stability, water stability and the weather resistance on road surface effectively, also can strengthen the disease resistance ability on road surface, improve the service level on road surface and reduce the maintenance work amount.SBS modifying asphalt of the present invention can be successfully used to build fields such as Heavy Traffic Road face, drainage pavement, deck paving, airfield runway, cycling track and building waterproof layer.
Embodiment
Embodiment 1: pitch 500g, star shaped SBS 17.5g, increase and prolong agent 25g and stablizer 0.25g.
The preparation method: (1) preparation increases prolongs agent, and rubber softening oil is mixed with Phthalic acid, diallyl ester, stirs 1.5 hours promptly down at 120 ℃ then;
(2) the preparation stablizer mixes the promotor TBTM tetrabutyl thiuram monosulfide with antioxidant 1076, under 65 ℃, stirred 1 hour then;
(3) preparation SBS modifying asphalt, 500g pitch is heated to 165 ℃, pitch dissolving back adds the 17.5g star shaped SBS and increasing of 25g step (1) preparation prolongs agent, star shaped SBS prolongs the agent dissolving after colloidal mill grinds with increasing, stirred then 2 hours, the stablizer that adds 0.25g step (2) preparation again, continue to stir 4 hours.
Embodiment 2: pitch 500g, star shaped SBS 25g, increase and prolong agent 5g and stablizer 1g.
The preparation method: (1) preparation increases prolongs agent, and rubber softening oil is mixed with Phthalic acid, diallyl ester, stirs 1 hour promptly down at 130 ℃ then;
(2) the preparation stablizer mixes the promotor TBTM tetrabutyl thiuram monosulfide with antioxidant 1076, under 70 ℃, stirred 0.8 hour then;
(3) preparation SBS modifying asphalt, 500g pitch is heated to 175 ℃, pitch dissolving back adds the 25g star shaped SBS and increasing of 5g step (1) preparation prolongs agent, star shaped SBS prolongs the agent dissolving after high-speed shearing machine mixed 30 minutes down at 3000 rev/mins with increasing, stirred then 2.5 hours, the stablizer that adds 1g step (2) preparation again, continue to stir 3 hours.
Embodiment 3: pitch 500g, star shaped SBS 12.5g, increase and prolong agent 15g and stablizer 0.45g.
The preparation method: (1) preparation increases prolongs agent, and rubber softening oil is mixed with Phthalic acid, diallyl ester, stirs 0.5 hour promptly down at 140 ℃ then;
(2) the preparation stablizer mixes the promotor TBTM tetrabutyl thiuram monosulfide with antioxidant 1076, under 75 ℃, stirred 0.5 hour then;
(3) preparation SBS modifying asphalt, 500g pitch is heated to 180 ℃, pitch dissolving back adds the 12.5g star shaped SBS and increasing of 15g step (1) preparation prolongs agent, star shaped SBS prolongs the agent dissolving after colloidal mill grinds with increasing, stirred then 3 hours, the stablizer that adds 0.45g step (2) preparation again, continue to stir 2 hours.
The contrast experiment 1: 500 gram pitches are added in the stainless steel cup, be heated to 175 ℃, 17.5 gram star-shaped sbs are joined in the cup, stirred 10 minutes with machine,massing, mixed 30 minutes under 3000 commentaries on classics/min with high-speed shearing machine again, continue to stir and add 9g stablizer SULPHUR POWDER after 2～3 hours, continue stirring again and promptly got modifying asphalt in 3 hours.
The contrast experiment 2: 500 gram SK70# pitches are joined in the stainless steel cup, be heated to 175 ℃, with 5 the gram increase prolong agent and 17.5 the gram SBS join in the cup, stirred 10 minutes with machine,massing, mixed 30 minutes down at 3000 rev/mins with high-speed shearing machine again, continue to stir and add 8.5g stablizer SULPHUR POWDER after 2～3 hours, continue stirring again and promptly got modifying asphalt in 3 hours.
SBS modifying asphalt that three embodiment of the present invention are prepared and contrast experiment 1 and contrast experiment 2 carry out the character comparative analysis, and be as shown in table 1 below.
Table 1
| Numbering | The contrast experiment 1 | The contrast experiment 2 | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Asphalt stock, g | 500 | 500 | 500 | 500 | 500 |
| Star shaped SBS, g | 17.5 | 17.5 | 17.5 | 25 | 12.5 |
| Increase and prolong agent, g | 0 | 5 | 25 | 5 | 15 |
| SULPHUR POWDER, g | 9 | 8.5 | 0 | 0 | 0 |
| The preparation stablizer, g | 0 | 0 | 0.25 | 1 | 0.45 |
| Penetration degree, 0.1mm | 60 | 58 | 51 | 54 | 56 |
| Softening temperature, ℃ | 58.5 | 64.5 | 87 | 81 | 78 |
| Ductility, cm, 5 ℃ | 17 | 25 | 33 | 35 | 37 |
| The segregation experiment, ℃ | 3.0 | 2.2 | 1.5 | 1.3 | 0.8 |
| Ductility behind the RTFOT, cm, 5 ℃ | 10.2 | 18 | 19 | 21 | 24 |
Found out obviously that by the data comparative analysis in the table 1 the prepared SBS modifying asphalt softening temperature of three embodiment of the present invention all reaches more than 75 ℃, ductility also obviously increases, and ductility reaches more than the 30cm, and ductility reaches more than the 20cm behind the RTFOT, and segregation is less than 1 ℃.
Claims (2)
1. SBS modifying asphalt, it is characterized in that: by pitch, star shaped SBS, increase and prolong agent and stablizer is made, the star shaped SBS consumption is 2.5～5% of an asphalt content, increasing and prolonging the agent consumption is 1.0～5.0% of asphalt content, stabilizing agent dosage is 0.5 of asphalt content～2.0 ‰, describedly increase that to prolong agent be to be stirred down at 120～140 ℃ by rubber softening oil and Phthalic acid, diallyl ester to be prepared from 0.5～1.5 hour, described stablizer be the promotor TBTM tetrabutyl thiuram monosulfide with antioxidant 1076 65～75 ℃ down stirrings be prepared from 0.5～1 hour.
2. SBS modified asphalt preparation method according to claim 1, it is characterized in that may further comprise the steps: (1) preparation increases prolongs agent, rubber softening oil is mixed with Phthalic acid, diallyl ester, then 120～140 ℃ times stirrings 0.5～1.5 hour promptly; (2) the preparation stablizer mixes the promotor TBTM tetrabutyl thiuram monosulfide with antioxidant 1076, under 65～75 ℃, stirred 0.5～1 hour then; (3) preparation SBS modifying asphalt, pitch is heated to 165～180 ℃, after the pitch dissolving increasing of star shaped SBS and step (1) preparation being prolonged agent adds, star shaped SBS prolongs the agent dissolving after colloidal mill grinds or high speed shear with increasing, stirred then 2～3 hours, the stablizer that adds step (2) preparation again, continue to stir 2～4 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101413114A CN101671143B (en) | 2008-09-09 | 2008-09-09 | SBS modified asphalt and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101413114A CN101671143B (en) | 2008-09-09 | 2008-09-09 | SBS modified asphalt and preparation method thereof |
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| Publication Number | Publication Date |
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| CN101671143A CN101671143A (en) | 2010-03-17 |
| CN101671143B true CN101671143B (en) | 2011-09-14 |
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| CN106751968A (en) * | 2016-12-16 | 2017-05-31 | 漳州新立基沥青有限公司 | A kind of high performance modified bitumen and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092295A (en) * | 2007-05-22 | 2007-12-26 | 当阳市公路管理段 | Rare earth modified cold repaired maintenance material for asphalt pavement, and preparation method |
| CN101186469A (en) * | 2007-12-19 | 2008-05-28 | 吉林省交通科学研究所 | Lava ash modified asphalt mixed material |
| CN101219870A (en) * | 2007-12-29 | 2008-07-16 | 哈尔滨工业大学 | Rubber particle sheet pavement material and method for paving rubber particle sheet pavement |
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2008
- 2008-09-09 CN CN2008101413114A patent/CN101671143B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092295A (en) * | 2007-05-22 | 2007-12-26 | 当阳市公路管理段 | Rare earth modified cold repaired maintenance material for asphalt pavement, and preparation method |
| CN101186469A (en) * | 2007-12-19 | 2008-05-28 | 吉林省交通科学研究所 | Lava ash modified asphalt mixed material |
| CN101219870A (en) * | 2007-12-29 | 2008-07-16 | 哈尔滨工业大学 | Rubber particle sheet pavement material and method for paving rubber particle sheet pavement |
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| CN101671143A (en) | 2010-03-17 |
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Granted publication date: 20110914 Termination date: 20160909 |