CN102887666A - Asphalt mixture with high anti-rutting capacity and preparation method thereof - Google Patents
Asphalt mixture with high anti-rutting capacity and preparation method thereof Download PDFInfo
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- CN102887666A CN102887666A CN2012103647086A CN201210364708A CN102887666A CN 102887666 A CN102887666 A CN 102887666A CN 2012103647086 A CN2012103647086 A CN 2012103647086A CN 201210364708 A CN201210364708 A CN 201210364708A CN 102887666 A CN102887666 A CN 102887666A
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Abstract
The invention relates to an asphalt mixture with high anti-rutting capacity. The asphalt mixture comprises the following components in parts by weight: 0.2-0.5 part of anti-rut agent by weight, 94.5-96.5 parts of aggregates by weight and 3.5-.5.5 parts of asphalt by weight. A preparation method for the asphalt mixture comprises the following steps of: (1) adding the anti-rut agent in water so as to prepare into an aqueous solution with a concentration of 0.3%; (2) adding the anti-rut agent aqueous solution into basalt aggregates of over 0.075 mm, and stirring; and (3) adding the asphalt in the treated aggregates, and preparing the asphalt mixture. According to the asphalt mixture provided by the invention, the viscosity of the asphalt can be largely improved through adding a trivalent ferric-salt anti-rut agent, the high-temperature anti-rutting capacity of an asphalt pavement is obviously improved, the damage of overloading vehicles and large traffic load on the asphalt pavement is lowered, and the service lives of the asphalt pavements are effectively prolonged. The preparation method for the asphalt mixture is simple; an excellent effect can be obtained by using less dosage of the anti-rut agent; the stirring time is short; the energy consumption is less; the construction is carried out at normal temperature; and the construction process is easy to control, and is free from pollutant emission.
Description
Technical field
The invention belongs to the ground surface material field, particularly a kind of asphalt with high rutting resistance and preparation method thereof.
Background technology
Asphalt pavement of highway early damage problem, having become affects the conspicuous contradiction that highway in China develops in a healthy way, and all parts of the country all exist to some extent the road surface and damage too early problem.And the characteristics that present morning damage time, damage wide ranges, damage intensity weigh.In the earlier period damage of bituminous pavement, especially destroy with the high temperature rut the most outstanding, south not only, and serious rut has also appearred in the north.At present, destroy for solving asphalt pavement rut, improve the rutting resistance of asphalt, general way mainly contains:
1, improved gradation.Improved gradation is a handle double-edged sword, just may not improve anti-rut performance if the grating reasonableness is good enough, and produce Water Damage.
2, asphalt modification.The effect of asphalt modification is relatively good, but the compatibility problem that has pitch and properties-correcting agent, in order to reach higher anti-rut performance, the properties-correcting agent that needs high dosage, and the properties-correcting agent of high dosage is difficult to be uniformly dispersed in pitch, and the laminated segregation of properties-correcting agent and pitch can appear in transit with in the storage process, its performance is on the contrary not as matrix pitch.
3, adopt anti-rut agent.
The anti-rut agent product category is a lot of in the market, and all be the asphalt mixture additive that is combined into by multiple polymers mostly, although the multiple actions such as tackify, reinforcement, filling and asphalt modification that can be by surface of aggregate, recovery of elasticity improve the high-temperature stability of asphalt, but have following problem: addition content is large, and cost is relatively high; Mixing time prolongs, and increases energy consumption; Need to improve construction temperature, increase Construction control difficulty and disposal of pollutants; The effect that rutting resistance improves is relatively low.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of asphalt with high rutting resistance is provided, it can significantly improve the high temperature rutting resistance of bituminous pavement, reduce heavy-duty vehicle and large Traffic load to the infringement of bituminous pavement, effectively prolong bituminous pavement work-ing life.
The present invention also aims to provide a kind of preparation method with asphalt of high rutting resistance.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of asphalt with high rutting resistance is characterized in that: the component by following weight fraction ratio consists of:
Anti-rut agent: 0.2 ~ 0.5 weight part;
Gather materials: 94.5 ~ 96.5 weight parts;
Pitch: 3.5 ~ 5.5 weight parts.
The component by following weight fraction ratio of described anti-rut agent consists of:
Trivalent iron salt: 40 ~ 50 weight parts;
Synthetic rubber: 40 ~ 50 weight parts;
Sulphur stablizer: 10 ~ 12 weight parts.
A kind of preparation method with asphalt of high rutting resistance is characterized in that: comprise the steps:
⑴. anti-rut agent is added to makes 3 ‰ the aqueous solution in the water;
⑵. the anti-rut agent aqueous solution is added in the above basalt aggregate of 0.075mm, stir process,
⑶. with the middle adding pitch that gathers materials of processing, the preparation asphalt.
A kind of preparation method with asphalt of high rutting resistance is characterized in that: comprise the steps:
⑴. will gather materials is added to a mixing bowl, and sprays into pitch, stirs 15s;
⑵. artificial or machinery drops into 3 ‰ anti-rut agent, gets final product discharging more than the stirring 30s, obtains the asphalt finished product.
Advantage of the present invention and beneficial effect are:
1. in the asphalt of the high anti-rut agent of the present invention, by adding the trivalent iron salt anti-rut agent, because the ferric ion in the aqueous solution is with stronger positive charge, the avidity of itself and building stones is greater than the avidity of water to building stones, thereby can with building stones close adhesion more, make building stones show stronger positive polarity, and then reach with electronegative pitch and attract each other the effect of good bond; Simultaneously employed elastomer powder with the contact action process of pitch in, absorb the oil content in the pitch, be evenly distributed in the pitch after the swelling, so that the softening temperature of pitch improves, viscosity increases, the mechanical property of asphalt is improved, and the anti-rut performance of the high temperature of bituminous pavement significantly improves.
2. the asphalt of the high anti-rut agent of the present invention, to add anti-rut agent be that a kind of new polymers that can improve stability at high temperature of asphalt mixture and rutting resistance adds properties-correcting agent.In asphalt, add the viscosity that this anti-rut agent can increase substantially pitch, significantly improve the high temperature rutting resistance of bituminous pavement, reduce heavy-duty vehicle and large Traffic load to the infringement of bituminous pavement, effectively prolong bituminous pavement work-ing life, have very strong engineering using value.
3. the asphalt preparation method of the high rutting resistance of the present invention is simple, adopts less anti-rut agent consumption can obtain excellent effect; Adopt the mode add first anti-rut agent or to add afterwards anti-rut agent all can prepare asphalt, the mixing time is short, and energy consumption is little; The normal temperature construction, construction process is easy to control and non-pollution discharge.
Description of drawings
Fig. 1 is the gradation curve of mineral aggregate of choosing.
Embodiment
The invention will be further described below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
Embodiment 1
A kind of (modification of AC-20C type) asphalt with high rutting resistance, it is made of following component:
Anti-rut agent: 0.3Kg;
Gather materials: 96.0Kg;
Sinopec (East Sea) SBS class I-D level modifying asphalt: 4.0Kg.
Wherein, gather materials to select such as the following table middle rank and join gathering materials of scope.
Wherein, anti-rut agent is made of the component of following weight percent:
Iron trichloride: 50Kg
Synthetic rubber: 40Kg
Sulphur stablizer: 10Kg
The preparation method of above-mentioned anti-rut agent is: it is below 80 orders that synthetic rubber is crushed to fineness, then synthetic rubber 40Kg and the sulphur stablizer 10Kg that crushes is added liquor ferri trichloridi, stirs under the normal temperature, obtains anti-rut agent.
The preparation method of the asphalt of above-mentioned high rutting resistance is:
(1) the 50Kg anti-rut agent is added to makes 3 ‰ aqueous solution in the water;
(2) the 0.3Kg anti-rut agent aqueous solution is added to gathers materials stir process more than the 0.075mm of 90.528Kg;
(3) at the middle adding 4Kg pitch that gathers materials of processing, finished product is the asphalt with high rutting resistance.
Embodiment 2
A kind of (modification of AC-20C type) asphalt with high rutting resistance, its component by following weight consists of:
Anti-rut agent: 0.3Kg;
Gather materials: 96.0Kg;
Sinopec (East Sea) SBS class I-D level modifying asphalt: 4.0 Kg;
Wherein, mineral aggregate adopts such as the following table grating:
Wherein, anti-rut agent is made of the component of following weight percent:
Iron trichloride: 50Kg;
Synthetic rubber: 40Kg;
Sulphur stablizer: 10Kg;
The preparation method of anti-rut agent is: it is below 80 orders that synthetic rubber is crushed to fineness, then synthetic rubber 40Kg and the sulphur stablizer 10Kg that crushes is added liquor ferri trichloridi, stirs under the normal temperature, obtains anti-rut agent.
The above-mentioned preparation method who contains the asphalt of this anti-rut agent is:
(1) with asphalt heating to 150～165 ℃, mineral aggregate is heated to 160～190 ℃;
(2) mineral aggregate of 90.528Kg and the pitch of 4.0Kg are dropped into mix in the amalgamator, and sprayed into the 0.3Kg anti-rut agent in rear 5～8 seconds in the pitch input;
(3) add the 5.472Kg breeze after stirring 10～15s spray into anti-rut agent in step ⑵ after, continue to stir more than the 15s, guarantee that mix is even, finished product is the asphalt with high rutting resistance.
Embodiment 3
A kind of (modification of AC-13C type) asphalt with high rutting resistance, it is made of following component:
Mineral aggregate adopts Shandong to produce the basalt coarse aggregate and limestone coarse aggregate: 95.2Kg is produced in Yutian, Hebei,
Pitch adopts Sinopec (East Sea) SBS class I-D level modifying asphalt: 4.8Kg;
Anti-rut agent: 0.4Kg.
Wherein, mineral aggregate adopts following grating:
Wherein, anti-rut agent is made of the component of following weight percent:
Iron trichloride: 45Kg;
Synthetic rubber: 44Kg;
Sulphur stablizer: 11Kg;
The preparation method of anti-rut agent is: it is below 80 orders that synthetic rubber is crushed to fineness, then synthetic rubber 44 Kg and the 11Kg sulphur stablizer that crushes is added in the 45Kg liquor ferri trichloridi, stirs under the normal temperature, obtains anti-rut agent.
Above-mentioned preparation method with asphalt of high rutting resistance is:
(1) with asphalt heating to 150～165 ℃, mineral aggregate is heated to 160～190 ℃;
(2) mineral aggregate of 88.822Kg and the pitch of 4.8Kg are dropped into mix in the amalgamator, and sprayed into the 0.4Kg anti-rut agent in rear 5～8 seconds in the pitch input;
(3) add the 6.378Kg breeze after stirring 10～15s spray into anti-rut agent in step ⑵ after, continue to stir more than the 15s, guarantee that mix is even, finished product is the asphalt with high rutting resistance.
Anti-rut agent of the present invention has following advantage:
1. cost performance is higher: only need the anti-rut agent of admixture 0.2%～0.5% in the plain asphalt compound, can significantly improve the high temperature resistant property of asphalt, and improve water resistant and damage performance, anti-cold cracking property etc.
⑴. the desk research test-results shows, adopts 0.2% anti-rut agent processing asphalt, can significantly improve the rutting resistance of asphalt more than ten times, and laboratory test results is as follows:
This product is mixed in the cylinder according to the thousandth input of compound weight and was stirred 3 minutes, and the asphalt mixture anti-rutting ability significantly improves.
Rutting resistance test-results before and after the basalt compound is processed
. this product drops into to mix in the cylinder according to the thousandth of compound weight and stirred 3 minutes, after make marshal piece, test specimen soaked in normal-temperature water 2 years, carried out the test of water resistant destructiveness, test-results demonstration water resistant destructiveness significantly improves.
Add this product front and back asphalt water resistant destructiveness test-results
| Processing mode | Add thousandth | Do not add |
| Residual stability (%) | 101.2 | 87.6 |
| Freeze thawing Ratio of split strength (%) | 102.3 | 74.8 |
2. adopt this product treatment asphalt can improve its anti-low-temperature cracking ability
With the rubber cement (anti-rut agent of breeze, Jia Deshi pitch and corresponding dosage) of anti-rut agent processing its low-temperature performance of BBR experimental examination.
BBR test-results table
As can be seen from the above table, the stiffness of the asphalt mastic after the processing diminishes, and the m value increases.Illustrate that the asphalt mastic crack resistance at low-temperature after processing improves.
3. do not affect mix-design, reduce technical difficulty.
Under any addition content, all do not change the grating of asphalt, and need not bitumen aggregate ratio is adjusted.
4. production technique is simple, and is workable.
As with this product treatment acidity aggregate, can above stockpile, directly spray this product water solution, gather materials and can produce asphalt after all soaking airing for some time.
As with this product as anti-rut agent, can be in Process of Pitch Mixture Production this product be directly dropped into to mix in the cylinder and gets final product, do not need to increase specific installation, and on mixing time and construction temperature without any impact.
Through street, Tianjin entity project applicable cases is as follows:
Each starting material place of production is that the limestone coarse aggregate is produced in Yutian, Hebei; Situ production limestone fine aggregate and breeze; Pitch is Sinopec (East Sea) SBS class I-D level modifying asphalt.Raw-material indices satisfies the requirement of " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004).
Adopt the GTM method to carry out AC-20C type Proportion Design of Modified Asphalt Mixture, and according to " highway engineering pitch and Asphalt Mixture Experiment rules " correlation test method (JTJ052-2000) dynamic stability, freeze thawing splitting and the low-temperature performance of asphalt are tested.
Gradation curve of mineral aggregate is as shown in fig. 1:
Mix-design adopts the GTM method.The specimen molding condition is: vertical pressure 0.8MPa; Mix and stir 180 ℃ of temperature; 160 ℃～165 ℃ of mold temperatures; Control mode is state of limit equilibrium, determines that best bitumen aggregate ratio is 4.0%.
Wheel tracking test the results are shown in following table.Test temperature is 60 ℃, wheel load 0.7MPa.Assay shows, the AC-20C type modified asphalt mixture of the adding anti-rut agent 3 ‰ of GTM method design has significant rutting resistance under the best bitumen aggregate ratio condition of design.
AC-20C type modified asphalt mixture wheel tracking test result (bitumen aggregate ratio 4.0%)
| Project | Do not add | Add 0.3% anti-rut agent |
| Dynamic stability (inferior/mm) | 2980 | 7325 |
| The variation coefficient (%) | 11.6 | 10.8 |
Water stability testing the results are shown in following table.Assay shows, the water stability of AC-20C type modified asphalt mixture under best bitumen aggregate ratio of the adding anti-rut agent 3 ‰ of GTM method design significantly improves.
AC-20C type modified asphalt mixture water stability assay (bitumen aggregate ratio 4.0%)
Cold bending rupture test is verified under-10 ℃ of cold condition of low-temperature performance employing of compound, and testing installation is the MTS-810 material-testing machine, and loading rate is 50mm/min.Test-results sees the following form:
Bending creep test is table as a result
Although for the purpose of illustration disclosed embodiments of the invention and accompanying drawing, but it will be appreciated by those skilled in the art that, in the spirit and scope that do not break away from the present invention and claims, various replacements, variation and modification all are possible, and therefore scope of the present invention is not limited to embodiment and the disclosed content of accompanying drawing.
Claims (4)
1. asphalt with high rutting resistance, it is characterized in that: the component by following weight fraction ratio consists of:
Anti-rut agent: 0.2 ~ 0.5 weight part;
Gather materials: 94.5 ~ 96.5 weight parts;
Pitch: 3.5 ~ 5.5 weight parts.
2. the asphalt with high rutting resistance according to claim 1, it is characterized in that: the component by following weight fraction ratio of described anti-rut agent consists of:
Trivalent iron salt: 40 ~ 50 weight parts;
Synthetic rubber: 40 ~ 50 weight parts;
Sulphur stablizer: 10 ~ 12 weight parts.
3. the preparation method with asphalt of high rutting resistance is characterized in that: comprise the steps:
⑴. anti-rut agent is added to makes 3 ‰ the aqueous solution in the water;
⑵. the anti-rut agent aqueous solution is added in the above basalt aggregate of 0.075mm, stir process,
⑶. with the middle adding pitch that gathers materials of processing, the preparation asphalt.
4. the preparation method with asphalt of high rutting resistance is characterized in that: comprise the steps:
⑴. will gather materials is added to a mixing bowl, and sprays into pitch, stirs 15s;
⑵. artificial or machinery drops into 3 ‰ anti-rut agent, gets final product discharging more than the stirring 30s, obtains the asphalt finished product.
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| CN2012103647086A CN102887666A (en) | 2012-09-26 | 2012-09-26 | Asphalt mixture with high anti-rutting capacity and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107324694A (en) * | 2017-06-20 | 2017-11-07 | 东南大学 | A kind of asphalt with rut self-healing properties and preparation method thereof |
| CN110272764A (en) * | 2019-06-04 | 2019-09-24 | 新奥科技发展有限公司 | A kind of preparation method of semicoke flying dust modifying agent and the utilization method of semicoke flying dust |
| CN112592105A (en) * | 2020-12-16 | 2021-04-02 | 许芙蓉 | Anti-rutting drainage asphalt mixture and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101063000A (en) * | 2006-04-30 | 2007-10-31 | 深圳市海川实业股份有限公司 | Bitumen modifier for traffic tracking resistance and modified bitumen and mixer thereof |
| CN101560072A (en) * | 2009-06-02 | 2009-10-21 | 天津市市政工程研究院 | Treatment method for strengthening surface adhesiveness of granite or limestone aggregates |
| CN102061100A (en) * | 2011-02-02 | 2011-05-18 | 佛山惠福化工有限公司 | Composite modifier modified road bitumen and preparation method thereof |
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2012
- 2012-09-26 CN CN2012103647086A patent/CN102887666A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063000A (en) * | 2006-04-30 | 2007-10-31 | 深圳市海川实业股份有限公司 | Bitumen modifier for traffic tracking resistance and modified bitumen and mixer thereof |
| CN101560072A (en) * | 2009-06-02 | 2009-10-21 | 天津市市政工程研究院 | Treatment method for strengthening surface adhesiveness of granite or limestone aggregates |
| CN102061100A (en) * | 2011-02-02 | 2011-05-18 | 佛山惠福化工有限公司 | Composite modifier modified road bitumen and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107324694A (en) * | 2017-06-20 | 2017-11-07 | 东南大学 | A kind of asphalt with rut self-healing properties and preparation method thereof |
| CN110272764A (en) * | 2019-06-04 | 2019-09-24 | 新奥科技发展有限公司 | A kind of preparation method of semicoke flying dust modifying agent and the utilization method of semicoke flying dust |
| CN110272764B (en) * | 2019-06-04 | 2020-12-29 | 新奥科技发展有限公司 | Preparation method of semicoke fly ash modifier and utilization method of semicoke fly ash |
| CN112592105A (en) * | 2020-12-16 | 2021-04-02 | 许芙蓉 | Anti-rutting drainage asphalt mixture and preparation method thereof |
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Application publication date: 20130123 |