CN101746994B - Small particle size gap gradation compact-type low-noise rubber asphalt concrete - Google Patents
Small particle size gap gradation compact-type low-noise rubber asphalt concrete Download PDFInfo
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- CN101746994B CN101746994B CN2008102397941A CN200810239794A CN101746994B CN 101746994 B CN101746994 B CN 101746994B CN 2008102397941 A CN2008102397941 A CN 2008102397941A CN 200810239794 A CN200810239794 A CN 200810239794A CN 101746994 B CN101746994 B CN 101746994B
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention provides a small particle size gap gradation compact-type low-noise rubber asphalt concrete. The mixture has the characteristics that: 1) for the mineral aggregate gradation scope of small particle size coarse aggregate gap gradation, the maximum nominal particle size of the gradation is 7.2 mm; in order to ensure compactness, the percentage composition of padding smaller than 0.075 mm in the mixture is from 7 to 11 percent; and in order to ensure skid resistance, the percentage composition of small particle size gravels larger than 2.36mm in the mixture is from 65 to 75 percent; 2) cement or slaked lime is used to replace mineral powder; 3) rubber asphalt is used as binder material in the mixture; scrap tire crumb rubber in the rubber asphalt is crumb rubber which has the specification of 40 to 80 meshes, is pulverized in normal temperature and has higher content of natural rubber, and the addition amount of the scrap tire crumb rubber reaches 21 to 23 percent of the weight of the asphalt; and the 180 DEG C brook field viscosity index of the rubber asphalt is 2.5 to 4Pa. s; 4) the design porosity of the mixture is 5 to 6 percent. The invention not only has good road performance such as skid resistance and high temperature deformation resistance, but also has the comprehensive characteristics of good durability, wide application range and obvious reduction of noise.
Description
Technical field
The invention belongs to highway and urban road subject, relate to the bituminous pavement specialty, the technical field of low noise bituminous concrete.
Background technology
In order to solve the pollution problem of city and peripheral path Traffic noise, in the world as far back as last century the eighties just begun the research of low noise bituminous pavement.Its research mainly is divided into two big types of problems: the one, and the mechanism that pavement noise forms, the 2nd, build lot of test road and entity project, through secular tracking observation, the use properties of more different noise-reduction asphalt road surfaces.
The driving noise of bituminous pavement comes from the friction on doughnut and road surface; Therefore, at first analyzed the influence of tyre tread in the world, thought for identical road surface to the friction noise size; Under identical condition, the difference of tyre tread is different to the driving Effects of Noise.In addition, the mechanism according to tire and the generation of automotive friction noise has proposed three kinds of different bituminous concrete noise reduction modes: the one, and porous sound absorption pattern, the 2nd, the diffuse-reflectance of sound wave and mutual interference pattern, the 3rd, elastic model.
The porous sound absorption pattern promptly utilizes the space that increases bituminous concrete to absorb the friction noise on tire and road surface, thereby reaches the purpose that reduces the driving noise.The on-the-spot voidage of this compound is generally 18～22%, and many spaces bituminous concrete just commonly used both at home and abroad at present (row's (passing through) bituminous grout concrete) is also referred to as open gradation wearing course (OGFC) abroad.What the use of this low noise road surface was many is the Holland in Europe and the Japan in Asia, and some countries in some states of the U.S. and West Europe.This road surface types not only can effectively reduce driving noise (initial stage can reach 6～10 decibels), and can improve the traffic safety of road surface rainy day.Yet also there is tangible weakness in this road surface, and the space in the concrete receives the pollution of environment easily and stops up, thereby makes road surface noise reduction decay very fast.According to pertinent data, use and to reduce by 30%～50% after 1～2 year.And keeping the noise reduction on road surface all to need 1～2 time clear hole maintenance every year, the maintenance cost is very high.Therefore this low noise road surface form is only applicable to the area that physical environment is relatively good, rainwater is many.
Utilizing the pattern reduction noise of sound wave diffuse-reflectance and interference is to adopt small particle size compact-type compound (on-the-spot voidage is generally 6%～8%); The gravel particle quantity that covers below the increase tire; Make every coccolith form mutual interference with the fricative noise sound wave of tire; Thereby reduce the intensity of noise, reach noise reduction.External general employing nominal maximum aggregate size is the concrete about 8mm, and the thickness that paves also relatively approaches (being generally about 20mm).Europe published thesis specially and points out in the 9th international bituminous pavement meeting in 2003, through decade-long tracking observation, adopted the bituminous concrete result of use of this low noise the most desirable.More representational in the world this concrete has the SMA10, SAM6 etc. of BBTM6, BBTM10 and the other countries of France.The noise reduction at this bituminous concrete initial stage generally differ 1～3 decibel, but weather resistance obviously is better than the latter not as many spaces bituminous concrete, and applicable scope is more extensive.When using this compound, should note keeping the cling property on road surface simultaneously; Can not reduce because of the particle diameter of compound and reduce the requirement of pavement skid resistance condition; When adopting BBTM6 type compound, the construction depth on road surface can not be less than 0.6, when adopting BBTM10 type compound like France's regulation; The construction depth on road surface can not be less than 0.8, and these indexs are all apparently higher than the requirement of the present asphalt pavement of highway construction depth of China.
Use rubber asphalt to increase the elasticity of bituminous concrete, reducing the driving noise is the third measure of road surface noise reduction.As far back as the early eighties in last century, Belgian scientist just finds that the rubber asphalt concrete road surface has good noise reduction.Nowadays the Ya Lisangna state of the U.S., continent, California, Texas etc. all adopt rubber asphalt to build the low noise road surface.Before Korean and Japanese's world cup began in 2002, Korea S had adopted rubber asphalt to lay the low noise road surface in order to reduce the driving noise of athletes' village and stadium periphery specially.
The research on China low noise road surface starts from the nineties later stage in last century, and Int. of Highway Sciences, Ministry of Communications has built article one low noise bituminous pavement test section (being positioned at Beijing-Shanghai Expressway Cangzhou, Hebei province section) at home according to the requirement of The Ministry of Communications's low noise Research on Bituminous Pavement problem.Six kinds of different low noise pavement structures have been built in this test section, and many spaces bituminous concrete is arranged, and compact type bituminous concrete is also arranged, and the minimum nominal maximum aggregate size of compound is 4.75mm, and that maximum is 16mm.Be 10 decibels to the maximum through detecting this test section noise reduction, minimum is 2～3 decibels.The building of this test road studied the low noise bituminous pavement from now on for China and laid a good foundation.The weather resistance low noise bituminous concrete form that this project proposes is consistent with the achievement of the research same period in the world.The technical measures of using rubber asphalt reduction driving noise have been studied again in 2002 science highway institutes of year traffic portion; Successively in Beijing, areas such as Hebei, Guangdong have built the test road; Obtained good result, detected proof and can reduce by 2～3 decibels of noises than nonrubber bituminous concrete.
This shows that using monotechnics to reduce the driving noise all has its characteristics and effect, but also all has certain deficiency.For example: adopt many spaces bituminous concrete to reduce the driving noise; Although effect is obvious; But, in use receive the influence (as: sand and dust) of physical environment easily, in order to keep good noise reduction because concrete voidage is bigger; Maintenance cost in the use is higher, and very difficult.Simultaneously undercapacity own, anti-fatigue performance is relatively poor.Therefore, the scope of application of the bituminous concrete of this low noise is narrow.And for example: small particle size also exists an application problem, the i.e. cling property on road surface as the low noise road surface.Guarantee that traffic safety is the basic function on road surface.In general, aggregate size is more little in the bituminous concrete, and the cling property of concrete road surface is low more; For this reason; Both at home and abroad, general bigger open gradation or the half-open grating of voidage that adopt is cling property to guarantee that compound has enough construction depths when adopting the small particle size compound.Said as the front, such low noise bituminous concrete weather resistance is not enough, and working conditions is harsh.Because the particle diameter of compound is little, cause compound anti-deforming scarce capacity simultaneously, be easy to generate rut and destroy, cause the reduction of driving comfort.
Summary of the invention
For this reason; The objective of the invention is to small particle size asphalt concrete technique, rubber asphalt concrete technology, coarse aggregate gap gradation compact-type concrete technology three are organically combined, propose a kind of small particle size gap gradation compact-type low-noise rubber asphalt concrete.It had both had good pavement performance such as cling property and anti-deforming ability, had good endurance, applied widely, the significant comprehensive characteristics of reduction noise again.
Small particle size gap gradation compact-type low-noise rubber asphalt concrete of the present invention, this compound comprises following mineral aggregate gradation, filler and rubber asphalt:
1) grading limit of the coarse aggregate gap gradation mineral aggregate of small particle size sees the following form.The maximum particle diameter of this grating is 9.5mm, and the nominal maximum particle diameter is 7.2mm.In order to guarantee the density of compound, the filler content below the 0.075mm in the compound is higher, reaches 7%～11%.In order to guarantee that compound has enough cling properties, the small particle size rubble content more than the 2.36mm in the compound is higher, reaches 65%～75%.
| Particle diameter (mm) | 9.5 | 7.2 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Through percentage (%) | 100 | ?90～100 | 58～68 | 25～35 | 19～28 | 15～22 | 12～18 | 9～14 | 7～11 |
2), adopt cement or slaked lime as filler instead of part breeze, as to select its volume of slaked lime for use be 2%～3% of mineral aggregate weight ratio, as to select its volume of cement for use be 5%～9% of mineral aggregate weight ratio in order to guarantee that compound has good water stability.
3) compound employing rubber asphalt is a binder.The specification of waste rubber tyre powder is the higher rubber powder of natural gum content that 40～80 order normal temperature are pulverized in the rubber asphalt.The outer volume of waste rubber tyre powder reaches 21%～23% of pitch weight ratio in the rubber asphalt.180 ℃ of rotation viscosity indexs of rubber asphalt are 2.5～4Pa.s.
4) the design voidage of compound is 5%～6%, guarantees the density of compound.
Innovative point of the present invention is: 1) use through small particle size and two kinds of technological synthesiss of rubber asphalt to reach remarkable reduction driving noise result, as a kind of low noise road surface; 2) adopt the small particle size compound of a kind of novel gap gradation of the theory building of coarse aggregate gap gradation, make compound have good density, thereby improve the weather resistance of this low-noise concrete; 3) through the structure of grating, although make that the particle diameter of compound is little, but still have good cling property, its construction depth index can reach the technical requirements of motorway; 4) rubber asphalt that adopts in the compound is to adopt waste rubber tyre powder and pitch to process, and the volume of waste rubber tyre powder reaches 21%～23% (pitch emphasis).This bituminous cements has very high viscosity, can significantly improve the anti-deforming ability of asphalt.
Small particle size gap gradation compact-type low-noise rubber asphalt concrete of the present invention has following beneficial effect:
1) reduces by 4～5 decibels of driving noises.
2) have the anti-shearing deformability of good high-temperature, the dynamic stability index reach 3000 times/more than the mm.
3) have good environmental compatibility, can not ring by the wind-engaging sand shadow, cause the too fast decay of noise reduction effect.
4) have good materials ' durability, i.e. anti-fatigue performance.
5) has good crack resistance at low-temperature.
Beijing is detected its noise reduction and use properties with regard to experimental project about authority detects unit.Data show, reach each item technical indicator proposed by the invention fully.
Embodiment
Further specify the present invention below in conjunction with specific embodiment, following each embodiment only is used to the present invention is described but not limitation of the present invention.
Embodiment 1:
1) selects limit small particle size rubble such as following table in each grade according to mineral aggregate gradation scope table.
2) in order to guarantee that compound has good water stability, adopt cement as filler instead of part breeze, part promptly in the table＜0.075, cement mixing content is 8% (weight ratio of mineral aggregate).
3) compound employing rubber asphalt is a binder.The specification of waste rubber tyre powder is the higher rubber powder of natural gum content that 60 order left and right sides normal temperature are pulverized in the rubber asphalt.The content of waste rubber tyre powder is about 22% in the rubber asphalt.180 ℃ of rotation viscosity indexs of rubber asphalt are 3.5Pa.s.
4) the design voidage of compound is 5.5%, guarantees the density of compound.
5) index of compound anti-deforming ability is: the dynamic stability of 60 ℃ of wheel tracking tests is not less than 3000 times/mm.
6) compound low-temperature performance index is: the limit breaking strain of-10 ℃ of girder low-temperature bending tests is greater than 2800 microstrains.
7) the cling property index of compound is: surface texture depth is greater than 0.6.
8) compound low noise index is: the asphalt concrete pavement that generally uses than present domestic motorway, Class I highway and city expressway, major trunk roads etc. reduces by 4～5 decibels of driving noises.
Embodiment 2:
2) adopt slaked lime as filler instead of part breeze, part promptly in the table＜0.075, the slaked lime volume is 3% (weight ratio of mineral aggregate).
All the other are identical with embodiment 1.
Embodiment 3:
2) adopt cement instead of part breeze, cement mixing content is 5% (weight ratio of mineral aggregate).
3) specification of waste rubber tyre powder is the higher rubber powder of natural gum content that 40 order normal temperature are pulverized in the rubber asphalt.The content of waste rubber tyre powder is about 23% in the rubber asphalt.180 ℃ of rotation viscosity indexs of rubber asphalt are 4Pa.s.
4) the design voidage of compound is 5%, guarantees the density of compound.
All the other are identical with embodiment 1.
Embodiment 4:
2) adopt slaked lime instead of part breeze, the slaked lime volume is 2% (weight ratio of mineral aggregate).
3) specification of waste rubber tyre powder is the higher rubber powder of natural gum content that 80 order normal temperature are pulverized in the rubber asphalt.The content of waste rubber tyre powder is 21% in the rubber asphalt.180 ℃ of rotation viscosity indexs of rubber asphalt are 2.54Pa.s.
4) the design voidage of compound is 6%, guarantees the density of compound.
All the other are identical with embodiment 1.
Embodiment 5:
1) selects each grade upper limit or lower limit small particle size rubble according to mineral aggregate gradation scope table.
All the other are identical with embodiment 1.
Claims (1)
1. a small particle size gap gradation compact-type low-noise rubber asphalt concrete is characterized in that, this compound comprises following mineral aggregate gradation, filler and rubber asphalt:
1) grading limit of the coarse aggregate gap gradation mineral aggregate of small particle size sees the following form; The maximum particle diameter of this grating is 9.5mm, and the nominal maximum particle diameter is 7.2mm; In order to guarantee the density of compound, the filler content below the 0.075mm in the compound is higher, reaches 7%～11%; In order to guarantee that compound has enough cling properties, the small particle size rubble content more than the 2.36mm in the compound is higher, reaches 65%～75%;
2) in order to guarantee that compound has good water stability, adopt cement or slaked lime as filler instead of part breeze, its volume is 2%～3% of a mineral aggregate weight when selecting slaked lime for use, elected when using cement its volume be 5%～9% of mineral aggregate weight; Breeze is＜mineral aggregate of 0.075mm;
3) compound employing rubber asphalt is a binder; The specification of waste rubber tyre powder is the higher rubber powder of natural gum content that 40～80 order normal temperature are pulverized in the rubber asphalt; Wherein the outer volume of waste rubber tyre powder reaches 21%～23% of pitch weight; 180 ℃ of rotation viscosity indexs of rubber asphalt are 2.5～4Pa.s;
4) the design voidage of compound is 5%～6%, guarantees the density of compound.
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| CN2008102397941A CN101746994B (en) | 2008-12-17 | 2008-12-17 | Small particle size gap gradation compact-type low-noise rubber asphalt concrete |
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| CN101746994B true CN101746994B (en) | 2012-10-31 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102060473A (en) * | 2010-11-16 | 2011-05-18 | 广东工业大学 | Manufacture method for plastic compound modified rubber asphalt concrete |
| IL244021A (en) | 2016-02-08 | 2017-02-28 | Acogum Ltd | Rubber-aggregate compositions for sound attenuation |
| CN105948646B (en) * | 2016-05-04 | 2018-04-10 | 浙江大学宁波理工学院 | A kind of dry-mixed mortar of fire-retardant noise reduction insulation |
| CN105924039A (en) * | 2016-05-10 | 2016-09-07 | 黑龙江省中信路桥材料有限公司 | High-modulus rubber asphalt concrete |
| CN106544944B (en) * | 2016-10-13 | 2019-02-26 | 长安大学 | A kind of small particle framework compact type asphalt mixture grading method |
| CN106839941A (en) * | 2017-02-14 | 2017-06-13 | 安徽安凯汽车股份有限公司 | One kind is based on the passive car wheel distance measurement method of vestige |
| CN111153634B (en) * | 2020-01-09 | 2022-03-18 | 江苏中新苏通市政工程有限公司 | Noise-reducing rubber modified asphalt concrete and preparation method thereof |
| CN113800818A (en) * | 2021-09-03 | 2021-12-17 | 山东高速股份有限公司 | Asphalt anti-skid wearing layer mixture and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239796A (en) * | 2008-01-16 | 2008-08-13 | 武汉理工大学 | High-performance low-noise asphalt pavement conserving material and preparation method thereof |
| CN101265053A (en) * | 2008-04-17 | 2008-09-17 | 江苏省交通科学研究院有限公司 | Asphalt-enriched discontinuous gradation rubber asphalt mixture |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239796A (en) * | 2008-01-16 | 2008-08-13 | 武汉理工大学 | High-performance low-noise asphalt pavement conserving material and preparation method thereof |
| CN101265053A (en) * | 2008-04-17 | 2008-09-17 | 江苏省交通科学研究院有限公司 | Asphalt-enriched discontinuous gradation rubber asphalt mixture |
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| JP特开2005-307670A 2005.11.04 |
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