CN101240093A - Road surface strengthening agent - Google Patents
Road surface strengthening agent Download PDFInfo
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- CN101240093A CN101240093A CNA2008100449034A CN200810044903A CN101240093A CN 101240093 A CN101240093 A CN 101240093A CN A2008100449034 A CNA2008100449034 A CN A2008100449034A CN 200810044903 A CN200810044903 A CN 200810044903A CN 101240093 A CN101240093 A CN 101240093A
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Abstract
A strengthening agent for asphalt pavement, which pertains to a additive to asphalt mixture for road building, and aims to solve the problem that application of internal mixing additives in asphalt for building a road needs very expensive special equipments which are hard to operate, or that weakness in low temperature performance, water stability and fatigue property of external mixing additives leads to the need of changing optimum asphalt-aggregate ratio of asphalt mixture, and great cost in application. The strengthening agent comprises 50-65% by weight of LLDPE with molecular weight between 30000-60000, 20-35% by weight of LDPE with molecular weight between 2000-5000, 1-2% by weight of road asphalt with penetration between 6mm-8mm, 3-10% by weight of lake asphalt with penetration between 0mm-0.5mm, 5-15% by weight of fiber stabilizer, 1-4% by weight of anti-stripping agent, 1-4% by weight of SASOBIT polyolefin. The invention can be used as additive for asphalt mixture, and strengthening agent for road asphalt.
Description
Technical field
The invention belongs to a kind of building the road with the additive of asphalt, particularly a kind of strengthening agent that is used to improve bituminous pavement high-temperature behavior, low-temperature performance, bad performance of damage by water and fatigue property.
Background technology
Along with socioeconomic fast development and progressive comprehensively, road Traffic Volume increases day by day and vehicle maximizes rapidly and serious overload, not only the quantity of operation of highway communication is required more and more highly, and the damage of bituminous pavement more and more aggravated the particularly threat of rut.Studies show that, the intensity of bituminous pavement and stability are closely related with the technical feature of asphalt, and all can improve the pavement performance of compound by means such as grating improvement, asphalt modification, asphalt modifications, engineering is actual adopt then mostly be the compound of different technologies.In recent years, be accompanied by succeeding in developing of the special-purpose additive of asphalt modification, the modified asphalt mixture technology in international forward position develops into " modification of compound " by " bituminous modification ", and modification mode also changes " mixing formula outward " into by " in mix formula ".
In mix the formula modified asphalt mixture be earlier with pitch by certain process modification after, mix and stir the asphalt that forms with gathering materials again.The additive of mixing the formula modified asphalt mixture in being used for mainly contains SBS, SBR, PE, EVA etc., and that the entity project application is the most general at most is SBS.The characteristics of mixing the formula modification in the pitch are to use dedicated modified equipment, the modified technique relative complex, and the pitch that will guarantee to add behind the additive is not emanated before use.
Mixing the formula modified asphalt mixture outward then is in the production process of compound, goes ahead of the rest among directly the properties-correcting agent adding being gathered materials behind the dry mixing certain hour, stirs the asphalt that forms with pitch again.Be used for the outer additive of mixing the formula modified asphalt mixture and mainly contain single additive such as fiber, rubber powder, diatomite and PRI anti-rut agent (France), Duroflex anti-rut agent (Germany), SEAM additive external specific complex additives such as (U.S.).The modified asphalt mixture that uses special-purpose additive to produce, characteristics such as good because of the good especially high-temperature behavior of its technical feature, that production and construction is simple, Technological Economy is reasonable, admitted and adopt gradually in the pavement engineering making at home and abroad, and range of application constantly enlarges.
External outer distinguishing feature of mixing formula modified asphalt mixture specialist additive is, the pavement performance that can effectively improve asphalt is high-temperature behavior especially, but price is generally higher, need to change the best bitumen aggregate ratio, limited to the improvement of low temperature performance of asphalt, water stability energy and fatigue property of asphalt.
Summary of the invention
The objective of the invention is to solve be used in the prior art road asphalt compound in mix the specific equipment that needs additional expensive that additive exists, complicated operation, easy isolating problem of modifying asphalt and the external special-purpose outer low temperature performance of asphalt of improving of mixing the additive existence, water stability can and fatigue property a little less than, application cost is big, need the problem of the best bitumen aggregate ratio of change asphalt, provide a kind of addition few, starting material are easy to get, product cost is low, need not to change the best bitumen aggregate ratio of asphalt, outer the mix additive useful to environmental protection, and have the high-temperature behavior that after interpolation, can significantly improve asphalt, effectively improve the compound low-temperature performance, the advantage of water stability energy and fatigue property.
Purpose of the present invention realizes by following technical proposals:
Road surface strengthening agent of the present invention promptly recited abovely outer is mixed additive, comprises following components in weight percentage:
Molecular weight is 30,000～60,000 linear low density polyethylene (English name: LLDPE) 50～65%
Molecular weight is 20,000～50,000 low-density high-pressure polyethylene (English name: LDPE) 20～35%
Penetration degree is the road bitumen 1～2% of 6mm～8mm
Penetration degree is the lake pitch 3～10% of 0mm～0.5mm
Fiber stabilizer 5～15%
Antistripping agent 1～4%
Polyolefin modifiers 1～4%
The preferred weight percent of each component is among the present invention:
Molecular weight is 30,000～60,000 linear low density polyethylene 50～55%
Molecular weight is 20,000～50,000 low-density high-pressure polyethylene 20～25%
Penetration degree is the road bitumen 1～2% of 6mm～8mm
Penetration degree is the lake pitch 5～10% of 0mm～0.5mm
Fiber stabilizer 10～15%
Antistripping agent 1～3%
Polyolefin modifiers 1～3%
The optimum weight per-cent of each component is among the present invention:
Molecular weight is 30,000～60,000 linear low density polyethylene 55%
Molecular weight is 20,000～50,000 low-density high-pressure polyethylene 20%
Penetration degree is the road bitumen 1% of 6mm～8mm
Penetration degree is the lake pitch 10% of 0mm～0.5mm
Fiber stabilizer 11%
Antistripping agent 2%
Polyolefin modifiers 1%
In above-mentioned each component, fiber stabilizer is lignin fibre or trevira or basalt fibre; Antistripping agent is Carlow amine or AR-78; Polyolefin modifiers is Sha Suobide.Wherein, Carlow amine, AR-78 are antistripping agent common on the domestic market, and Sha Suobide (English name: SASOBIT) also be polyolefins asphalt modifier commonly used on the market.
The present invention adopts each component of above-mentioned weight percent, can directly when producing, add asphalt by " mixing outward " modification mode, and after interpolation, can improve the compound high-temperature behavior significantly, effectively improve compound low-temperature performance, water stability energy and fatigue property, can satisfy service requirements.Main ingredient of the present invention all derives from municipal solid wastes (as waste plastic, waste rubber, waste fiber etc.), have that starting material are easy to get, product cost is low, to advantages such as environmental protection are useful, and a small amount of in use interpolation can reach requirement, can be used as the special-purpose outer additive of mixing of asphalt.
Embodiment
The present invention is further illustrated below in conjunction with specific embodiment.
Embodiment 1:
Each component and the weight percent thereof of road surface strengthening agent are:
Molecular weight is 30,000～60,000 LLDPE 55kg
Molecular weight is 20,000～50,000 LDPE 20kg
Penetration degree is the road bitumen 1kg of 6mm～8mm
Penetration degree is the lake pitch 10kg of 0mm～0.5mm
Lignin fibre 11kg
Antistripping agent Carlow amine 2kg
Polyolefine SASOBIT 1kg
The road surface strengthening agent preparation method of present embodiment is divided into three steps:
First step adds liquid antistripping agent Carlow amine then for being that 0mm～0.5mm lake pitch is heated to 130 ℃ with penetration degree, stir treat its cooling after, it is standby with runner milling or pulverizer cooling material to be become 100 purpose powders;
Second step is mixed the back extruding pelletization for being the road bitumen of 6mm～8mm with lignin fibre and penetration degree by the granule machine;
Third step is for being that 20,000～50,000 LDPE, molecular weight are 30,000～60,000 LLDPE, polyolefine SASOBIT and the prepared material of the one or two step with molecular weight, by joining in the SHJ-50 parallel double-screw extruder after the high-speed mixer mixing, the temperature of setting five heated zones of forcing machine is respectively 140 ℃, 150 ℃, 170 ℃, 190 ℃ and 180 ℃, adjust screw speed to 160 rev/min, thing to be mixed is extruded the back from head and is opened the rotary cutter pelletizing, behind the particle naturally cooling, obtain product of the present invention.
In order to verify the beneficial effect of product of the present invention, the test that the bituminous pavement strengthening agent that present embodiment is prepared send highway engineering inspection center of the Ministry of Communications (Beijing) to carry out the modified asphalt mixture pavement performance detects.Test method is, at first be that 175 ℃ grating is gathered materials and comprised rubble material and fine rock material dry mixing in advance 30 seconds with road surface strengthening agent and temperature, and then to add the temperature of being determined by viscosity-temperature curve be 150 ℃ asphaltic binder pitch, mixes and stirs after 120 seconds to add breeze, mixed and stirred at last 60 seconds.Concrete test situation is as follows:
The asphaltic binder that test is adopted is a Korea S SK-70# matrix pitch, and gathering materials is that limestone, best bitumen aggregate ratio are 4.5%; Road surface strengthening agent (Pave-Strong, the English abbreviation: volume PS) is 0.4% of a quality of asphalt mixtures.According to the requirement of " asphalt highway construction technique normalizing " (JTJ F40-2004), check pitch and every technical feature of gathering materials, the result all satisfies code requirement, can use.
The mineral aggregate gradation that shop experiment is determined is as shown in table 1.
Table 1
| The grating type | Quality percentage (%) by following sieve aperture (mm) | |||||||||||
| 26.5 | 19 | 16 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 | |
| The grating bound | 100 | 90～ 100 | 78～ 92 | 62～ 80 | 50～ 72 | 26～ 56 | 16～ 44 | 12～ 33 | 8～ 24 | 5～ 17 | 4～ 13 | 3～ 7 |
| AC-20C | 100 | 98.8 | 91.7 | 79.4 | 58.3 | 41.2 | 26.3 | 14.2 | 10.5 | 7.4 | 5.6 | 4.0 |
1, to the situation that influences of asphalt Marshall stability, flow valuve, voidage, pitch saturation ratio and void in mineral aggregate
(1) testing method
According to T0702, T0706 among the ministerial standard JTJ 052-2000 of the Ministry of Communications " highway engineering pitch and asphalt testing regulation " and T0709 regulation shaping test piece and test.Asphalt mix equipment: the SDJ-20 type asphalt stirrer of Xi'an An Jie Science and Technology Ltd.; Specimen molding instrument: the automatic compaction test apparatus of MDG-11 type asphalt of Nanjing HTC test apparatus Applied Research Laboratory; Test apparatus: the LD-127 pavement material intensity tester of the remarkable highway in Cangzhou instrument plant.
(2) test result
Test result sees Table 2.
Table 2 adds behind the product road surface strengthening agent PS of the present invention test mixture table as a result in asphalt
| Test index | Unit | Code requirement (motorway, Class I highway, heavily loaded traffic, the hot district of summer) | Test-results | |
| Do not add PS | Add PS | |||
| Stability MS | KN | ＞8 | 13.66 | 14.48 |
| Flow valuve FL | mm | 2～4 | 3.57 | 2.97 |
| Voidage VV | ％ | 3～6 | 4.16 | 4.11 |
| Pitch saturation ratio VFA | ％ | 65～75 | 68.32 | 68.89 |
| Void in mineral aggregate VMA | ≥13 | 13.12 | 13.21 | |
Table 2 shows that behind the interpolation product P S road surface strengthening agent of the present invention, the asphalt that the Marshall stability of asphalt is not added product of the present invention increases in asphalt, and other index then is more or less the same, but all satisfies code requirement.
2, to the situation that influences of asphalt high-temperature behavior
(1) testing method
According to T0703, T0719 regulation shaping test piece and test among the ministerial standard JTJ 052-2000 of the Ministry of Communications " highway engineering pitch and asphalt testing regulation ".Specimen molding instrument: the light combined rut sample of the HYCX-1 type shaper of Beijing experimental instrument and equipment company limited; Test apparatus: the HYCZ-5 type scientific research multi-usage full automatic vehicle track tester of Beijing experimental instrument and equipment company limited.
(2) test result
Test result sees Table 3.
Table 3 adds compound high-temperature behavior test-results table behind the product road surface strengthening agent PS of the present invention in asphalt
| Test index | Unit | Code requirement (motorway, Class I highway, heavily loaded traffic, the hot district of summer) | Test-results | |
| Do not add PS | Add PS | |||
| Dynamic stability DS | Inferior/mm | ＞1000 | 1856 | 10737 |
| Test temperature: 60 ℃; Wheel load: 0.7 ± 0.05MP | ||||
Table 3 shows that behind the interpolation product P S road surface strengthening agent of the present invention, the asphalt that the dynamic stability of asphalt does not add product of the present invention is significantly increased in asphalt, and nearly 6 times of increase rate is well beyond code requirement.
3, to the situation that influences of low temperature performance of asphalt
(1) testing method
According to T0703, T0715 regulation shaping test piece and test among the ministerial standard JTJ 052-2000 of the Ministry of Communications " highway engineering pitch and asphalt testing regulation ".Specimen molding instrument: the light combined rut sample of the HYCX-1 type shaper of Beijing experimental instrument and equipment company limited; Test apparatus: the WDW1020 type microcomputer control electronics universal testing machine of Guangzhou Orco testing tool company limited.
(2) test result
Test result sees Table 4.
Table 4 adds behind the product road surface strengthening agent PS of the present invention compound cold performance test table as a result in asphalt
| Test index | Unit | Code requirement (surface layer in winter cold-zone or winter-warm syndrome district, the road surface) | Test-results | |
| Do not add PS | Add PS | |||
| Breaking strain | με | ＞2000 | 3218.4 | 3573.7 |
| Bending tensile strength | MPa | - | 9.6 | 10.2 |
| The bending stiffness modulus | MPa | - | 3001.2 | 2890.0 |
| Test temperature :-10 ℃; Loading rate: 50mm/min | ||||
Table 4 shows that behind the interpolation product P S road surface strengthening agent of the present invention, the asphalt that product of the present invention is not added in the low temperature damage strain of asphalt has clear improvement, and can satisfy code requirement in asphalt.
4, to stability of asphalt mixture can the situation that influences
4.1 immersion Marshall Test
(1) testing method
According to T0702, T0709 regulation shaping test piece and test among the ministerial standard JTJ 052-2000 of the Ministry of Communications " highway engineering pitch and asphalt testing regulation ".Asphalt mix equipment: the SDJ-20 type asphalt stirrer of Xi'an An Jie Science and Technology Ltd.; Specimen molding instrument: the automatic compaction test apparatus of MDG-11 type asphalt of Nanjing HTC test apparatus Applied Research Laboratory; Test apparatus: the LD-127 pavement material intensity tester of the remarkable highway in Cangzhou instrument plant.
(2) test result
Test result sees Table 5.
Table 5 adds behind the product road surface strengthening agent of the present invention compound immersion Marshall Test table as a result in asphalt
| Test index | The unit position | Code requirement (moist district or wetted area) | Test-results |
| Do not add PS | Add PS |
| The residual stability ratio | ％ | ＞80 | 89.9 | 93.0 |
Table 5 shows that behind the interpolation product P S road surface strengthening agent of the present invention, the asphalt that the residual stability of asphalt does not add product of the present invention has clear improvement, and satisfies code requirement in asphalt.
4.2 freeze thawing split test
(1) testing method
According to T0702, T0709 among the ministerial standard JTJ 052-2000 of the Ministry of Communications " highway engineering pitch and asphalt testing regulation " and T0729 regulation shaping test piece and test.Asphalt mix equipment: the SDJ-20 type asphalt stirrer of Xi'an An Jie Science and Technology Ltd.; Specimen molding instrument: the automatic compaction test apparatus of MDG-11 type asphalt of Nanjing HTC test apparatus Applied Research Laboratory; Test apparatus: the LD-127 pavement material intensity tester of the remarkable highway in Cangzhou instrument plant, the WDW1020 type microcomputer control electronics universal testing machine of Guangzhou Orco testing tool company limited.
(2) test result
Test result sees Table 6.
Table 6 adds behind the product road surface strengthening agent of the present invention compound freeze thawing split test table as a result in asphalt
| Test index | Unit | Code requirement (moist district or wetted area) | Test-results | |
| Do not add PS | Add PS | |||
| The cleavage strength ratio | ％ | ＞80 | 82.3 | 86.4 |
Table 6 shows that behind the interpolation product P S road surface strengthening agent of the present invention, the freeze thawing cleavage strength of asphalt has improvement and satisfies code requirement than the asphalt that does not add product of the present invention in asphalt.
5, to the situation that influences of asphalt fatigue property
(1) testing method
According to T0703, T0719 regulation shaping test piece among the ministerial standard JTJ 052-2000 of the Ministry of Communications " highway engineering pitch and asphalt testing regulation ", test according to U.S. ASTM three branch fatigue test methods simultaneously.Asphalt mix equipment: the SDJ-20 type asphalt stirrer of Xi'an An Jie Science and Technology Ltd.; Specimen molding instrument: the light combined rut sample of the HYCX-1 type shaper of Beijing experimental instrument and equipment company limited; Test apparatus: American MTS-810 material-testing machine.
Test conditions: sample dimensions is 40mm * 40mm * 250mm; Stride the footpath and be 200mm; The load waveform is the haversine ripple; The load frequency is 10hz; Test temperature is 20 ℃; Loading regime is that three branches load; Control mode is a stress control.
(2) test result
Test result sees Table 7.
Table 7 adds compound fatigue test results table behind the product road surface strengthening agent of the present invention in asphalt
| The type of asphalt | Flexural tensile strength (MPa) | Stress ratio σ/s | The horizontal σ of stress value (MPa) | Fatigue lifetime (N f) | Fatigue equation parameter (lgN f＝a-blgσ) |
| Do not add PS | 6.77 | 0.6 | 4.06 | 315 | a＝4.4332 b＝3.1747 |
| 0.5 | 3.39 | 599 | |||
| 0.4 | 2.71 | 1040 | |||
| 0.3 | 2.03 | 2981 | |||
| Add PS | 7.01 | 0.6 | 4.21 | 215 | a＝4.7890 b＝3.8339 |
| 0.5 | 3.50 | 608 | |||
| 0.4 | 2.80 | 1210 | |||
| 0.3 | 2.10 | 3339 |
Table 7 shows that behind the interpolation product road surface strengthening agent PS of the present invention, asphalt a value is higher than the asphalt that does not add product of the present invention, shows that PS compound anti-fatigue performance is better in asphalt; And the b value also is higher than the asphalt that does not add product of the present invention, shows that counter stress level fatigue lifetime of PS compound changes responsive.
In order further to verify the beneficial effect of product of the present invention, mix the improve effect of two kinds of additives of formula properties-correcting agent PRI anti-rut agent (method home made article, entity project are used the most general at most) outward with mixing formula properties-correcting agent SBS (entity project is used the most general at most) and external asphalt special use in product P S road surface strengthening agent of the present invention and the pitch, carried out indoor comparison test the asphalt pavement performance.Also the improvement of asphalt pavement performance under the different admixture dosage of PS road surface strengthening agent is tested simultaneously.
1, to asphalt Marshall stability, flow valuve, voidage, pitch saturation ratio, residual stability than, cleavage strength the situation that influences than, dynamic stability and breaking strain
(1) testing method
The asphaltic binder that test is adopted is Esso 70# matrix pitch and 5%SBS finished product asphaltum (matrix pitch is shell AH-90), and gathering materials is the Sichuan EMEISHAN BASALTS; The volume of PS road surface strengthening agent is 0.1,0.2,0.3,0.4,0.5% of a quality of asphalt mixtures, and the PRI anti-rut agent is 0.4% of a quality of asphalt mixtures according to the recommended dose of product vendor.According to " asphalt highway construction technique normalizing " requirement (JTJF40-2004), check pitch and every technical feature of gathering materials, the result all satisfies code requirement, can use.
The mineral aggregate gradation that shop experiment is determined is as shown in table 8.
Table 8
| The grating type | Quality percentage (%) by following sieve aperture (mm) | |||||||||
| 16 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 | |
| Standard grating bound | 100 | 90～ 100 | 68～ 85 | 38～ 68 | 24～ 50 | 15～ 38 | 10～ 28 | 7～ 20 | 5～ 15 | 4～ 8 |
| AC-13C | 100 | 95.5 | 72.0 | 45.7 | 29.2 | 19.1 | 14.4 | 10.6 | 8.5 | 5.9 |
The best bitumen aggregate ratio of matrix pitch compound and SBS modified asphalt mixture is 5.0%; The PS asphalt need not change the best bitumen aggregate ratio of matrix pitch compound, is 5.0% therefore yet; The PRI asphalt need change the best bitumen aggregate ratio of matrix pitch compound, normally on the basis of the best bitumen aggregate ratio of matrix pitch compound, increase by 0.1～0.2%, in order to give full play to the modified effect of PRI anti-rut agent, the best bitumen aggregate ratio of its compound is defined as 5.2%.
Test main testing installation: LJS-2 type Marshall standard compaction test apparatus, LMS-2 type Marshall stability instrument, HYCX-1 type rut plate specimen molding machine, the automatic wheel tracking test instrument of HYCZ-5 type, LMT-2 type asphalt mixture material performance test system, MTS-810 universal testing machine.Test method: according to regulation shaping test piece among the ministerial standard JTJ 052-2000 of the Ministry of Communications " highway engineering pitch and asphalt testing regulation " and test.Wherein fatigue test is carried out according to U.S. ASTM three branch fatigue test methods.
(2) test result
Test result sees Table 9, table 10.
Table 9 adds the pavement performance test-results table of compound behind the various dose PS in asphalt
| Test index | Unit | Asphalt pavement performance detected result | |||||
| Do not add PS | 0.1％PS | 0.2％PS | 0.3％PS | 0.4％PS | 0.5％PS | ||
| Voidage | ％ | 3.9 | 4.1 | 4.1 | 4.2 | 4.0 | 4.2 |
| Stability | KN | 13.3 | 14.0 | 15.0 | 15.2 | 17.5 | 17.7 |
| Flow valuve | mm | 39.6 | 39.8 | 38.4 | 37.5 | 35.2 | 30.4 |
| The pitch saturation ratio | ％ | 73.4 | 73.4 | 73.1 | 72.0 | 72.1 | 71.9 |
| The residual stability ratio | ％ | 88.1 | 88.2 | 89.8 | 90.6 | 92.0 | 95.0 |
| The cleavage strength ratio | ％ | 79.8 | 82.1 | 83.5 | 85.0 | 85.8 | 87.4 |
| Dynamic stability | Inferior/mm | 1060 | 3033 | 5221 | 6537 | 11328 | 14195 |
| Breaking strain | με | 1138 | 1376 | 1429 | 1410 | 1527 | 1606 |
Table 9 shows, after in asphalt, adding product P S road surface strengthening agent of the present invention, every pavement performance index of asphalt all is better than not adding the asphalt of product of the present invention, and increase along with PS road surface strengthening agent admixture dosage, modified effect is good more, particularly the high-temperature behavior of compound is improved the effect highly significant.
Table 10SBS modifying asphalt reaches the pavement performance test-results table with dosage PS, PRI modified asphalt mixture
| Test index | Unit | Asphalt pavement performance detected result | |||
| Do not add PS | 0.4％PS | SBS | 0.4％PRI | ||
| Voidage | ％ | 3.9 | 4.0 | 3.9 | 4.5 |
| Stability | KN | 13.3 | 17.5 | 14.1 | 17.4 |
| Flow valuve | mm | 39.6 | 35.2 | 37.3 | 32.6 |
| The pitch saturation ratio | ％ | 73.4 | 72.1 | 73.5 | 71.7 |
| The residual stability ratio | ％ | 88.1 | 92.0 | 95.2 | 91.4 |
| The cleavage strength ratio | ％ | 79.8 | 85.8 | 92.9 | 85.1 |
| Dynamic stability | Inferior/mm | 1060 | 11328 | 5850 | 12617 |
| Breaking strain | με | 1138 | 1527 | 1777 | 1418 |
Table 10 shows, in pitch and asphalt, add SBS, PS road surface strengthening agent and PRI anti-rut agent after, the pavement performance of asphalt all has clear improvement.Mix in its medium pitch properties-correcting agent to compound water stability and low-temperature performance to improve effect best, and PS, PRI asphalt mix formula properties-correcting agent outward the high-temperature behavior of compound are improved most pronounced effects.From the modified effect of dynamic stability, mix formula properties-correcting agent PS and PRI outward and should belong to same grade, and mix the modified effect of formula properties-correcting agent SBS in being much better than, and on modified technique, PS, PRI mix modification outward and also are better than and mix modification in the SBS.Contrast is with the PS under the volume, PRI modified asphalt mixture, can find, PS is better than PRI to the raising outline of the whole pavement performance index of compound, the main material of composition of considering PS all derives from municipal solid wastes (waste plastic, waste rubber, waste fiber etc.), material cost is low impels product cost to decline to a great extent, so its bulking property price ratio is better than the PRI anti-rut agent.
In view of the characteristics that PS road surface strengthening agent of the present invention is improved largely to the asphalt high-temperature behavior, the 0.4%PS asphalt is carried out the alternating temperature wheel tracking test, test temperature is divided into 60 ℃, 65 ℃ and 70 ℃.Simultaneously also to SBS modifying asphalt and carried out fatigue test with dosage PS modified asphalt mixture, test-results gather see Table 11, table 12.
Table 110.4%PS asphalt alternating temperature wheel tracking test is table as a result
| Test index | Unit | Code requirement (motorway, Class I highway, heavily loaded traffic, Xia Yan | Test-results |
| 60℃ | 65℃ | 70℃ |
| The hot-zone) | |||||
| Dynamic stability DS | Inferior/mm | ＞1000 | 11060 | 5455 | 3806 |
Table 12SBS modifying asphalt reaches the fatigue test results table with dosage PS modified asphalt mixture
| The type of asphalt | Ultimate load (N) | Stress ratio σ/s | Stress σ (MPa) | Fatigue lifetime (N f) | lg σ | lgN f |
| Do not add PS | 3309.33 | 0.2 | 3.102 | 3177 | 0.492 | 3.502 |
| 0.3 | 4.654 | 1534 | 0.668 | 3.186 | ||
| 0.4 | 6.205 | 460 | 0.793 | 2.663 | ||
| 0.5 | 7.756 | 191 | 0.890 | 2.281 | ||
| 0.6 | 9.307 | 166 | 0.969 | 2.220 | ||
| SBS | 2305.12 | 0.2 | 2.161 | 7878 | 0.335 | 3.896 |
| 0.3 | 3.242 | 4168 | 0.511 | 3.620 | ||
| 0.4 | 4.322 | 1151 | 0.636 | 3.061 | ||
| 0.5 | 5.403 | 563 | 0.733 | 2.751 | ||
| 0.6 | 6.483 | 366 | 0.812 | 2.563 | ||
| 0.4％PS | 3569.81 | 0.2 | 3.347 | 3095 | 0.525 | 3.491 |
| 0.3 | 5.020 | 947 | 0.701 | 2.976 | ||
| 0.4 | 6.693 | 293 | 0.826 | 2.467 | ||
| 0.5 | 8.367 | 155 | 0.923 | 2.190 | ||
| 0.6 | 10.040 | 99 | 1.002 | 1.996 |
Table 11 shows that behind the interpolation product 0.4%PS road surface strengthening agent of the present invention, along with the rising of test temperature, the dynamic stability value of PS asphalt constantly reduces, and the speed that reduces is by dying down by force in asphalt.In 60 ℃～65 ℃ amplitudes that reduce of temperature section is 38.5%, then is 35.7% 65 ℃～70 ℃ of temperature sections.In any case but, the dynamic stability value of PS asphalt still is higher than the asphalt that does not add PS in the time of 70 ℃, reached 3000 times/more than the mm, show the very excellent high-temperature behavior that the PS modified asphalt mixture is had once more, fully proved the remarkable quality of PS road surface strengthening agent at the asphalt pavement rut resisting aspect of performance.
The testing data of his-and-hers watches 12 makes lgN
f=a-blg σ can draw tired regression equation parameter a, the b of three kinds of asphalts respectively.The a value that the result does not add the PS asphalt is 2.9346, and the b value is 5.0077; The a value of SBS asphalt is 2.9662, and the b value is 4.9740; The a value of PS asphalt is 3.2241, and the b value is 5.1884.Product road surface strengthening agent PS of the present invention is added in explanation in asphalt after, asphalt a value is higher than asphalt and the SBS asphalt that does not add product of the present invention, shows that PS compound anti-fatigue performance is better; And the b value also is higher than the asphalt that does not add product of the present invention, shows that counter stress level fatigue lifetime of PS compound changes responsive.
Embodiment 2:
Each component and the weight percent thereof of road surface strengthening agent are:
Molecular weight is 30,000～60,000 LLDPE 50kg
Molecular weight is 20,000～50,000 LDPE 25kg
Penetration degree is the road bitumen 1kg of 6mm～8mm
Penetration degree is the lake pitch 10kg of 0mm～0.5mm
Lignin fibre 11kg
Antistripping agent Carlow amine 2kg
Polyolefine SASOBIT 1kg
Its preparation method is identical with embodiment 1.
Embodiment 3:
Each component and the weight percent thereof of road surface strengthening agent are:
Molecular weight is 30,000～60,000 LLDPE 50kg
Molecular weight is 20,000～50,000 LDPE 20kg
Penetration degree is the road bitumen 1kg of 6mm～8mm
Penetration degree is the lake pitch 10kg of 0mm～0.5mm
Lignin fibre 15kg
Antistripping agent Carlow amine 2kg
Polyolefine SASOBIT 2kg
Its preparation method is identical with embodiment 1.
Embodiment 4:
Each component and the weight percent thereof of road surface strengthening agent are:
Molecular weight is 30,000～60,000 LLDPE 55kg
Molecular weight is 20,000～50,000 LDPE 25kg
Penetration degree is the road bitumen 1kg of 6mm～8mm
Penetration degree is the lake pitch 5kg of 0mm～0.5mm
Lignin fibre 10kg
Antistripping agent Carlow amine 2kg
Polyolefine SASOBIT 2kg
Its preparation method is identical with embodiment 1.
Embodiment 5:
Each component and the weight percent thereof of road surface strengthening agent are:
Molecular weight is 30,000～60,000 LLDPE 65kg
Molecular weight is 20,000～50,000 LDPE 20kg
Penetration degree is the road bitumen 1kg of 6mm～8mm
Penetration degree is the lake pitch 3kg of 0mm～0.5mm
Lignin fibre 7kg
Antistripping agent Carlow amine 2kg
Polyolefine SASOBIT 2kg
Its preparation method is identical with embodiment 1.
Embodiment 6:
Each component and the weight percent thereof of road surface strengthening agent are:
Molecular weight is 30,000～60,000 LLDPE 50kg
Molecular weight is 20,000～50,000 LDPE 35kg
Penetration degree is the road bitumen 2kg of 6mm～8mm
Penetration degree is the lake pitch 8kg of 0mm～0.5mm
Lignin fibre 3kg
Antistripping agent Carlow amine 1kg
Polyolefine SASOBIT 1kg
Its preparation method is identical with embodiment 1.
Embodiment 7:
Lignin fibre in above embodiment 1～6 is replaced with trevira, and its consumption is identical with lignin fibre.Other component and consumption thereof are identical with embodiment 1.
Its preparation method is identical with embodiment 1.
Embodiment 8:
Lignin fibre in above embodiment 1～6 is replaced with basalt fibre, and its consumption is identical with lignin fibre.Other component and consumption thereof are identical with embodiment 1.
Embodiment 9:
Antistripping agent Carlow amine in above embodiment 1～8 is replaced with antistripping agent AR-78, and its consumption is identical with antistripping agent Carlow amine.Other component and consumption thereof are identical with embodiment 1.
Its preparation method is identical with embodiment 1.
Claims (9)
1, road surface strengthening agent is characterized in that, is made of the component of following weight per-cent:
Molecular weight is 30,000～60,000 linear low density polyethylene 50～65%
Molecular weight is 20,000～50,000 low-density high-pressure polyethylene 20～35%
Penetration degree is the road bitumen 1～2% of 6mm～8mm
Penetration degree is the lake pitch 3～10% of 0mm～0.5mm
Fiber stabilizer 5～15%
Antistripping agent 1～4%
Polyolefin modifiers 1～4%
2, road surface strengthening agent as claimed in claim 1 is characterized in that, the weight percent of described each component is:
Molecular weight is 30,000～60,000 linear low density polyethylene 50～55%
Molecular weight is 20,000～50,000 low-density high-pressure polyethylene 20～25%
Penetration degree is the road bitumen 1～2% of 6mm～8mm
Penetration degree is the lake pitch 5～10% of 0mm～0.5mm
Fiber stabilizer 10～15%
Antistripping agent 1～3%
Polyolefin modifiers 1～3%
3, road surface strengthening agent as claimed in claim 2 is characterized in that, the weight percent of described each component is:
Molecular weight is 30,000～60,000 linear low density polyethylene 55%
Molecular weight is 20,000～50,000 low-density high-pressure polyethylene 20%
Penetration degree is the road bitumen 1% of 6mm～8mm
Penetration degree is the lake pitch 10% of 0mm～0.5mm
Fiber stabilizer 11%
Antistripping agent 2%
Polyolefin modifiers 1%
As claim 1 or 2 or 3 described road surface strengthening agents, it is characterized in that 4, described fiber stabilizer is lignin fibre or trevira or basalt fibre.
5, road surface strengthening agent as claimed in claim 4 is characterized in that, described antistripping agent is a Carlow amine.
6, road surface strengthening agent as claimed in claim 4 is characterized in that, described antistripping agent is AR-78.
7, road surface strengthening agent as claimed in claim 4 is characterized in that, described polyolefin modifiers is Sha Suobide.
8, road surface strengthening agent as claimed in claim 5 is characterized in that, described polyolefin modifiers is Sha Suobide.
9, road surface strengthening agent as claimed in claim 6 is characterized in that, described polyolefin modifiers is Sha Suobide.
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| CN2008100449034A CN101240093B (en) | 2008-03-07 | 2008-03-07 | Road surface strengthening agent |
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| CN2008100449034A CN101240093B (en) | 2008-03-07 | 2008-03-07 | Road surface strengthening agent |
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| CN101824176A (en) * | 2010-03-10 | 2010-09-08 | 成都鑫利公路材料开发有限公司 | Asphalt heat recycling modifier |
| CN103013143A (en) * | 2012-12-13 | 2013-04-03 | 肖菁 | High-elasticity modulus fiber composite asphalt |
| CN103059587A (en) * | 2012-12-14 | 2013-04-24 | 北京中交路通科技发展有限公司 | Anti-rutting modifying agent used for asphalt pavement and asphalt mixture containing anti-rutting modifying agent |
| CN103289420A (en) * | 2012-02-22 | 2013-09-11 | 西安荣泰高分子材料有限公司 | Admixing type modifier of asphalt mixture |
| CN103360773A (en) * | 2013-07-18 | 2013-10-23 | 华南理工大学 | Composite asphalt modifier, its preparation method and application |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1249774A (en) * | 1997-01-08 | 2000-04-05 | 菲纳研究公司 | Bituminous composition contg. linear copolymers |
| JP2003171557A (en) * | 2001-12-05 | 2003-06-20 | Fiber Resin Kk | Non-heating type modified asphalt, water-permeable pavement structure therefrom and construction method therefor |
| CN100451064C (en) * | 2006-07-31 | 2009-01-14 | 西安高远公路养护技术有限公司 | Rut resisting admixutre for high-grade asphalt highway |
| DE102006038614A1 (en) * | 2006-08-17 | 2008-02-21 | Norddeutsche Mischwerke Gmbh & Co. Kg | Process for reuse of spent asphalts and production of bituminous mixtures |
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| CN101824176A (en) * | 2010-03-10 | 2010-09-08 | 成都鑫利公路材料开发有限公司 | Asphalt heat recycling modifier |
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| CN103289420A (en) * | 2012-02-22 | 2013-09-11 | 西安荣泰高分子材料有限公司 | Admixing type modifier of asphalt mixture |
| CN103013143A (en) * | 2012-12-13 | 2013-04-03 | 肖菁 | High-elasticity modulus fiber composite asphalt |
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| CN103059587A (en) * | 2012-12-14 | 2013-04-24 | 北京中交路通科技发展有限公司 | Anti-rutting modifying agent used for asphalt pavement and asphalt mixture containing anti-rutting modifying agent |
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| CN104098918A (en) * | 2013-04-11 | 2014-10-15 | 上海建设机场道路工程有限公司 | Modified asphalt and preparation method thereof |
| CN103360773A (en) * | 2013-07-18 | 2013-10-23 | 华南理工大学 | Composite asphalt modifier, its preparation method and application |
| CN103360773B (en) * | 2013-07-18 | 2015-09-02 | 华南理工大学 | A kind of composite asphalt modifier and preparation method thereof and application |
| CN105585271A (en) * | 2014-10-22 | 2016-05-18 | 中国石油化工股份有限公司 | Additive for improving water stability of asphalt mixture and application method thereof |
| CN105585271B (en) * | 2014-10-22 | 2017-07-28 | 中国石油化工股份有限公司 | A kind of additive and its application process for improving stability of asphalt mixture |
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