CN103739239A - Composite fiber material used in mixed asphalt material - Google Patents
Composite fiber material used in mixed asphalt material Download PDFInfo
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- CN103739239A CN103739239A CN201310753825.6A CN201310753825A CN103739239A CN 103739239 A CN103739239 A CN 103739239A CN 201310753825 A CN201310753825 A CN 201310753825A CN 103739239 A CN103739239 A CN 103739239A
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Abstract
The invention discloses a composite fiber material used in a mixed asphalt material. The composite fiber material is prepared by mixing and uniformly stirring the following raw materials in percentage by weight: 48-53% of cellulose fiber, 30-34% of basalt fiber and 16-20% of sepiolite fiber. The composite fiber material disclosed by the invention is prepared by mixing and uniformly stirring three different fiber materials according to a ratio, the improvement effect on pavement properties of single fiber materials in the mixed asphalt material can be carried into the composite fiber materials, the composite fiber material which can comprehensively improve the pavement property of the mixed asphalt material is developed, and compared with the mixed asphalt material which is modified by using single fiber, the composite fiber material is capable of comprehensively improving various pavement properties of a road asphalt surface layer, and is high in cost performance.
Description
Technical field
The invention belongs to pavement asphalt material technology field, be specifically related to a kind of used for asphalt mixture complex fiber material.
Background technology
Along with the high speed development of modern economy, the traffic density on road increases year by year, drives a vehicle, and axle carries change weight, canalized traffic is more obvious, and these are all had higher requirement to the pavement performance of road bitumen surface layer.For the pavement performance of road improvement oil mat is to meet the demand of road occupation, people through exploration for many years after deliberation many kinds of measures, fiber is as a kind of very noticeable novel asphalt mixture additive and the stablizer that occur in the world in recent years, because of its excellent property, the advantage such as construct simple is widely used in some modified asphalt mixtures and plain asphalt compound.
Along with the kind of fiber product is more and more, filamentary material is also applied to pavement construction more and more widely, and current modal road fiber mainly comprises three kinds: lignin fibre, polymer fiber and mineral fibre.In prior art, many adding to certain single fiber as properties-correcting agent prepared the more excellent fiber and modified asphalt compound of pavement performance in asphalt, although every kind of road fiber has superiority, but every kind of fiber is all more single to the improvement effect of Asphalt Mixture Performance, adopt certain single road fiber also more limited to the improvement effect of Asphalt Mixture Performance as properties-correcting agent.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, a kind of used for asphalt mixture complex fiber material is provided, this complex fiber material is proportionally mixed to mix thoroughly by three kinds of different types of filamentary materials and forms, individual fiber materials can be extended in complex fiber material the effect of improving of Asphalt Mixture Performance, compare with the asphalt that adopts ultimate fibre to carry out modification, this complex fiber material is every pavement performance of road improvement oil mat comprehensively, has higher cost performance.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of used for asphalt mixture complex fiber material, it is characterized in that: by the raw material mixing of following weight percentage, mix thoroughly and form: lignin fibre 48%～53%, basalt fibre 30%～34%, sepiolite fibre 16%～20%.
Above-mentioned a kind of used for asphalt mixture complex fiber material, is characterized in that: by the raw material mixing of following weight percentage, mixed thoroughly and formed: lignin fibre 49%～52%, basalt fibre 31%～33%, sepiolite fibre 16%～18%.
Above-mentioned a kind of used for asphalt mixture complex fiber material, is characterized in that: by the raw material mixing of following weight percentage, mixed thoroughly and formed: lignin fibre 50%, basalt fibre 33%, sepiolite fibre 17%.
Individual fiber materials and the complex fiber material usage in preparing modified asphalt mixture is: mineral aggregate gradation type adopts AC-13 type, according to < < highway engineering pitch and Asphalt Mixture Experiment rules > > (JTGE20-2011), require preparation to add the modified asphalt mixture of individual fiber materials and the conjugated fibre modified asphalt mixture of interpolation complex fiber material of the present invention, the mineral aggregate preparing according to design grating is placed in to baking oven and is heated to 180～190 ℃ and insulation, pitch and breeze are heated to 160 ℃ and insulation, the mineral aggregate of insulation is added and mixed in pot, then the individual fiber materials for modification or embodiment 1 to 5 complex fiber material are added and mix pot and at 165 ℃ of temperature, mix and stir 90s and be dispersed in mineral aggregate to filamentary material, and then pitch is added to mix in pot, mix and stir 90s, finally breeze is added to mix and in pot, mix and stir 90s, after moulding, obtain dissimilar modified asphalt mixture, described pitch is 70
#a level petroleum pitch, the consumption of described complex fiber material is quality of asphalt mixtures 2.9 ‰～3.1 ‰, the consumption of described individual fiber materials is quality of asphalt mixtures 3 ‰.
The present invention compared with prior art has the following advantages:
1, the present invention makes complex fiber material according to a certain ratio by three kinds of fibers with different performance, first be added in mineral aggregate and stir, then three kinds of fibers are dispersed in asphalt, aspect the improved performance of asphalt, playing good and bad complementary effect: lignin fibre has advantages of good temperature stability and chemical stability, is insoluble to common solvent, acid and alkali-resistance, anticorrosive and to human body and environmentally friendly, and there is very strong physisorption, add the weather resistance that can improve asphalt in asphalt; Basalt fibre has advantages of good high-temperature stability, high tensile, lower volume, low rate of moisture absorption, low heat conductivity, acid and alkali-resistance, radioprotective and ultraviolet ray and good chemical stability, joins the high temperature resistance rut ability that can strengthen asphalt in asphalt and takes into account and improve low-temperature performance; Sepiolite fibre has high specific surface area, porosity and extremely strong adsorptivity, in fiber channel and hole, can adsorb a large amount of water or polar material, when temperature is during at 200～250 ℃, fiber pore volume and specific surface area are maximum, its moisture absorption and moisture releasing function are the strongest, add the water stability that can strengthen asphalt in asphalt, and can interact and play synergy to improving the pavement performance of asphalt with basalt fibre.
2, adding conjugated fibre modified asphalt mixture prepared by complex fiber material of the present invention can standing storage, avoids the problem of general modified asphalt mixture poor storage stability; In addition than plain asphalt compound and ultimate fibre modified asphalt mixture, every pavement performance of conjugated fibre modified asphalt mixture is more balanced and have significantly and improve.
3, utilize complex fiber material of the present invention to prepare the production process technology of conjugated fibre modified asphalt mixture relatively simple, equipment requirements is few, and production cost is low, has higher cost performance.
Below by embodiment, technical scheme of the present invention is described in further detail.
Embodiment
Embodiment 1
The present embodiment used for asphalt mixture complex fiber material is mixed thoroughly and is formed by the raw material mixing of following weight percentage: lignin fibre 50%, basalt fibre 33%, sepiolite fibre 17%.While adopting the present embodiment complex fiber material to prepare modified asphalt mixture, the consumption of described complex fiber material is quality of asphalt mixtures 3 ‰.
Embodiment 2
The present embodiment used for asphalt mixture complex fiber material is mixed thoroughly and is formed by the raw material mixing of following weight percentage: lignin fibre 48%, basalt fibre 34%, sepiolite fibre 18%.While adopting the present embodiment complex fiber material to prepare modified asphalt mixture, the consumption of described complex fiber material is quality of asphalt mixtures 3 ‰.
Embodiment 3
The present embodiment used for asphalt mixture complex fiber material is mixed thoroughly and is formed by the raw material mixing of following weight percentage: lignin fibre 52%, basalt fibre 32%, sepiolite fibre 16%.While adopting the present embodiment complex fiber material to prepare modified asphalt mixture, the consumption of described complex fiber material is quality of asphalt mixtures 3 ‰.
Embodiment 4
The present embodiment used for asphalt mixture complex fiber material is mixed thoroughly and is formed by the raw material mixing of following weight percentage: lignin fibre 49%, basalt fibre 31%, sepiolite fibre 20%.While adopting the present embodiment complex fiber material to prepare modified asphalt mixture, the consumption of described complex fiber material is quality of asphalt mixtures 2.9 ‰.
Embodiment 5
The present embodiment used for asphalt mixture complex fiber material is mixed thoroughly and is formed by the raw material mixing of following weight percentage: lignin fibre 53%, basalt fibre 30%, sepiolite fibre 17%.While adopting the present embodiment complex fiber material to prepare modified asphalt mixture, the consumption of described complex fiber material is quality of asphalt mixtures 3.1 ‰.
Adopt 70
#a level petroleum pitch, gather materials, breeze and individual fiber materials or the embodiment of the present invention 1 to 5 complex fiber material, according to < < standard specification for construction and acceptance of highway asphalt pavement > > (JTG F40-2004), prepare modified asphalt mixture, to described 70
#a level petroleum pitch, gather materials and the Specifications of breeze detects, detected result is respectively as shown in table 1, table 2 and table 3, and the formate gradation composition of mineral aggregate is as shown in table 4.
Table 170
#the petroleum pitch technical requirements of A level and detected result
The table 2 technological property detected result of gathering materials
| Particle diameter (mm) | Apparent relative density r a | Crush values (%) |
| 10-15 | 2.788 | 16 |
| 5-10 | 2.752 | 20 |
| 3-5 | 2.713 | - |
| 0-3 | 2.725 | - |
The technical requirements of table 3 breeze and detected result
Table 4 mineral aggregate formate gradation composition
According to < < standard specification for construction and acceptance of highway asphalt pavement > > (JTG F40-2004) and < < bituminous pavement, with lignin fibre national standard > > (JT-T533-2004), the lignin fibre using in the present invention, basalt fibre and sepiolite fibre are carried out respectively to fundamental property test, test result is as shown in table 5.Three kinds of fiber fundamental property test results of table 5
One, modifying asphalt rheology testing
Using three kinds of fibers of the present invention as three factors, consider the Coordinated Play of every kind of fiber to Rheological Property of Asphalt improvement effect, when preparing complex fiber material, the consumption of three kinds of fibers should not differ too large, by the Determination of quantity of every kind of fiber in complex fiber material, be 1 part, 2 parts, 3 parts three kinds of levels, form 3 factor 3 hydraulic tests.The usage of described conjugated fibre in preparing modifying asphalt is: first matrix pitch is poured in container, at the uniform velocity stir and be heated to 150 ℃～160 ℃ after insulation, again conjugated fibre is repeatedly added in container slowly, after continuing at the uniform velocity stirring and be incubated 30～45min at 150 ℃～160 ℃ temperature, be cooled to the conjugated fibre modifying asphalt that room temperature obtains mixing, described matrix pitch is 70
#a level petroleum pitch, 1% of the consumption asphalt quality of described conjugated fibre.According to < < highway engineering pitch and Asphalt Mixture Experiment rules > > (JTG E20-2011), the conjugated fibre modifying asphalt that adds every kind of mixed ratio example conjugated fibre in orthogonal table and prepare is carried out respectively to 60 ℃ of dynamic shear rheologicals (DSR) test to obtain its rut factor G
*/ sin δ and-18 ℃ of curved beam rheologies (BBR) test are to obtain its low temperature stiffness modulus S, by rut factor G
*the calculation result of/sin δ according to from big to small successively integration sequence be 1 to 9, test result is as shown in table 6, by the calculation result of low temperature stiffness modulus S according to from small to large successively integration sequence be 1 to 9, test result is as shown in table 7.
The rut factor calculation result of table 6 different composite fiber and modified asphalt
As can be seen from Table 6: when the fiber mixed ratio example of A, C, tri-kinds of factors of D is 1:3:3, the rut factor of modifying asphalt is maximum, and integration is 1; When the fiber mixed ratio example of A, C, tri-kinds of factors of D is 1:1:1, the rut factor of modifying asphalt is minimum, and integration is 9.Rut factor G
*/ sin δ is larger, and the permanent deformation resistance of modified asphalt material is stronger, so this integration is less, represents that modifying asphalt high temperature rheology prepared by this mixed ratio example complex fiber material of interpolation can be better.
The stiffness modulus calculation result of table 7 different composite fiber and modified asphalt
As can be seen from Table 7: when the fiber mixed ratio example of A, C, tri-kinds of factors of D is 1:2:2 and 3:2:1, modifying asphalt stiffness modulus is minimum, and integration is 1; When the fiber mixed ratio example of A, C, tri-kinds of factors of D is 3:3:2, stiffness modulus is only greater than the stiffness modulus under the first two mixed ratio example, therefore integration is 3, S is larger for low temperature stiffness modulus, represent that modified asphalt material presents fragility, the easy cracking destruction in road surface, so this integration is less, modifying asphalt low temperature rheologic behavior prepared by this mixed ratio example complex fiber material of expression interpolation is better.The integration sequence of every group of test in table 6 and table 7 is added respectively and after according to from small to large again integration sequence be 1 to 9, calculate different composite fiber and modified asphalt rheological test overall result, as shown in table 8.
Table 8 different composite fiber and modified asphalt rheological test overall result
As can be seen from Table 8: when the fiber mixed ratio example of A, C, tri-kinds of factors of D is 3:2:1, sequence integration and be minimum in 9 groups of tests, therefore when fiber mixed ratio example is the 3:2:1 in the embodiment of the present invention 1, the comprehensive rheological property of prepared conjugated fibre modifying asphalt is best.
Two, modified asphalt mixture pavement performance test
Adopt AC-13 type mineral aggregate gradation, according to < < highway engineering pitch and Asphalt Mixture Experiment rules > > (JTG E-20-2011), require to prepare respectively unmodified matrix pitch compound, the marshal piece of individual fiber materials modified asphalt mixture and embodiment 1 to 5 complex fiber material modified asphalt mixture and rut plate test specimen, to unmodified matrix pitch compound, the pavement performance of individual fiber materials modified asphalt mixture and embodiment 1 to 5 complex fiber material modified asphalt mixture carries out respectively contrast test, test result is as shown in table 9.
Table 9 different pitches Asphalt Mixture test result
From the data results of table 9, can find out that the complex fiber material modified asphalt mixture that adds embodiment 1 to 5 compares every pavement performance index of matrix pitch compound and all have significantly and promote, simultaneously complex fiber material is compared any individual fiber materials and more can be taken into account the pavement performances such as the anti-rut performance of asphalt high temperature, low-temperature cracking-resistance, water stability and fatigue property are played to the more balanced effect of improving when as asphalt material modified, and the comprehensive pavement performance of asphalt obtaining is thus better.Three, modified asphalt mixture cost-efficiency analysis
1) calculate pavement performance advantage
Individual event pavement performance dominant ratio is compared to the degree that the individual event pavement performance of matrix pitch compound promotes, the individual event pavement performance dominant ratio i of modified asphalt mixture R for the individual event pavement performance of quantitative description modified asphalt mixture
rmethod of calculation be:
In formula:
for the individual event pavement performance observed value of modified asphalt mixture R, i
matrix valuefor the individual event pavement performance observed value of matrix pitch compound,
be respectively the individual event pavement performance observed value of each asphalt that participates in evaluation and electing, described in the compound that participates in evaluation and electing comprise the asphalt that adds ultimate fibre modification and the conjugated fibre modified asphalt mixture that adds embodiment 1 to 5.
The method of calculation of the pavement performance advantage IR of modified asphalt mixture R are:
In formula: ∑ i
rfor each individual event pavement performance dominant ratio of modified asphalt mixture R add and, the pavement performance advantage IR calculation result of different modified asphalt compound is as shown in table 10.
The calculation result of table 10 different modified asphalt Asphalt Mixture advantage
2) calculate additional cost
In the present invention, the additional cost of modified asphalt mixture is defined as the difference between the cost of matrix pitch used in the cost sum of matrix pitch used and filamentary material in modified asphalt mixture and matrix pitch compound, and described matrix pitch is 70
#a level petroleum pitch, its cost is 5000 yuan/t, the asphalt content of matrix pitch compound is 0.045t, in matrix pitch compound, the cost of matrix pitch used is 225 yuan, the additional cost of calculating respectively different modified asphalt compound per ton according to 3000 yuan/t of lignin fibre cost, 12000 yuan/t of basalt fibre cost, 15000 yuan/t of sepiolite fibre cost, calculation result is as shown in table 11.
The additional cost calculation result of table 11 different modified asphalt compound
3) calculate cost performance
The cost performance of Asphalt Mixture of the present invention is defined as the pavement performance advantage IR of asphalt and the ratio of additional cost, and the calculation result of different modified asphalt compound cost performance is as shown in table 12.The cost performance of table 12 different modified asphalt compound
| Mix type | Cost performance |
| Add the modified asphalt mixture of lignin fibre | 0.885 |
| Add the modified asphalt mixture of basalt fibre | 1.263 |
| Add the modified asphalt mixture of sepiolite fibre | 1.216 |
| Add the modified asphalt mixture of embodiment 1 | 2.149 |
| Add the modified asphalt mixture of embodiment 2 | 2.094 |
| Add the modified asphalt mixture of embodiment 3 | 2.147 |
| Add the modified asphalt mixture of embodiment 4 | 2.148 |
| Add the modified asphalt mixture of embodiment 5 | 2.089 |
Complex fiber material modified asphalt mixture of the present invention is compared any individual fiber materials modified asphalt mixture and is had higher cost performance as can be seen from Table 12, the Performance and Cost Modeling of comprehensive complex fiber material modified asphalt mixture can be found out, the modifying asphalt that adds complex fiber material of the present invention has good rheological property, and the modified asphalt mixture of interpolation complex fiber material of the present invention has the economy of more balanced, good pavement performance and Geng Jia.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification of above embodiment being done according to the technology of the present invention essence, change and equivalent structure change, and all still belong in the protection domain of technical solution of the present invention.
Claims (3)
1. a used for asphalt mixture complex fiber material, is characterized in that: by the raw material mixing of following weight percentage, mixed thoroughly and formed: lignin fibre 48%～53%, basalt fibre 30%～34%, sepiolite fibre 16%～20%.
2. according to a kind of used for asphalt mixture complex fiber material claimed in claim 1, it is characterized in that: by the raw material mixing of following weight percentage, mix thoroughly and form: lignin fibre 49%～52%, basalt fibre 31%～33%, sepiolite fibre 16%～18%.
3. according to a kind of used for asphalt mixture complex fiber material claimed in claim 2, it is characterized in that: by the raw material mixing of following weight percentage, mix thoroughly and form: lignin fibre 50%, basalt fibre 33%, sepiolite fibre 17%.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105274923A (en) * | 2015-10-26 | 2016-01-27 | 河南师范大学 | Fiber-added and tackified micro-surfacing overlay |
| CN107162493A (en) * | 2016-03-07 | 2017-09-15 | 中房创通建设集团有限公司 | A kind of modified asphalt concrete and preparation method thereof, construction method |
| CN109231894A (en) * | 2018-10-20 | 2019-01-18 | 四川志德公路工程有限责任公司 | A kind of road asphalt mixture and preparation method thereof |
| CN109293281A (en) * | 2018-10-20 | 2019-02-01 | 四川志德公路工程有限责任公司 | A kind of modified asphalt mixture and preparation method thereof |
| CN109626874A (en) * | 2019-01-28 | 2019-04-16 | 上海时申工贸有限公司 | A kind of antiseepage Recycled Asphalt Pavement and its preparation process |
| CN111205658A (en) * | 2020-01-07 | 2020-05-29 | 汇通路桥建设集团有限公司 | Modified asphalt mortar and preparation method and application thereof |
| CN112745062A (en) * | 2021-01-05 | 2021-05-04 | 中电建路桥集团有限公司 | Composite fiber modified asphalt mixture with excellent performance and preparation method thereof |
| CN113321474A (en) * | 2021-07-21 | 2021-08-31 | 四川佰汇混凝土工程有限公司 | Anti-seepage sprayed concrete |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105274923A (en) * | 2015-10-26 | 2016-01-27 | 河南师范大学 | Fiber-added and tackified micro-surfacing overlay |
| CN105274923B (en) * | 2015-10-26 | 2017-05-24 | 河南师范大学 | Fiber-added and tackified micro-surfacing overlay |
| CN107162493A (en) * | 2016-03-07 | 2017-09-15 | 中房创通建设集团有限公司 | A kind of modified asphalt concrete and preparation method thereof, construction method |
| CN107162493B (en) * | 2016-03-07 | 2020-02-21 | 中铁创通建设集团有限公司 | Modified asphalt concrete and preparation method and construction method thereof |
| CN109231894A (en) * | 2018-10-20 | 2019-01-18 | 四川志德公路工程有限责任公司 | A kind of road asphalt mixture and preparation method thereof |
| CN109293281A (en) * | 2018-10-20 | 2019-02-01 | 四川志德公路工程有限责任公司 | A kind of modified asphalt mixture and preparation method thereof |
| CN109231894B (en) * | 2018-10-20 | 2021-08-24 | 四川志德公路工程有限责任公司 | Asphalt mixture for roads and preparation method thereof |
| CN109293281B (en) * | 2018-10-20 | 2021-09-14 | 四川志德公路工程有限责任公司 | Modified asphalt mixture and preparation method thereof |
| CN109626874A (en) * | 2019-01-28 | 2019-04-16 | 上海时申工贸有限公司 | A kind of antiseepage Recycled Asphalt Pavement and its preparation process |
| CN111205658A (en) * | 2020-01-07 | 2020-05-29 | 汇通路桥建设集团有限公司 | Modified asphalt mortar and preparation method and application thereof |
| CN112745062A (en) * | 2021-01-05 | 2021-05-04 | 中电建路桥集团有限公司 | Composite fiber modified asphalt mixture with excellent performance and preparation method thereof |
| CN113321474A (en) * | 2021-07-21 | 2021-08-31 | 四川佰汇混凝土工程有限公司 | Anti-seepage sprayed concrete |
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