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IRF2005会议论文摘要 W30：沥青材料

　更新时间：2005年07月08日 　来源：　作者：


第十五届国际道路联盟世界会议 ——会议论文摘要
W30：沥青材料      

160 用伴合场伴合的结合料铺路  
作者：法国，Colas S.A.（法国），Jean-Eric Poirier

Ninety percent of the pavements in France use bituminous mixes for construction or maintenance or use bitumen in their surfacings. This bitumen is obtained by refining crude oil. During the refining process it is possible to decide to produce a greater or lesser quantity of bitumen from a given crude and allocate a greater or lesser percentage of that bitumen to use in roads.

Therefore, the development of a road binder with physico-chemical characteristics similar to those of bitumen but which is made entirely of raw materials obtained from the agricultural sector is central to the issue of energy resources and environmental gains.

On this basis of, Colas has carried out research to develop a 100% plant-based binder that can provide an alternative to the use of bitumen for road construction and maintenance.

This publication sets out the properties of this vegetable binder and the performance of mixes made with it.

Trials were conducted at two worksites in 2003. We shall present: - the relevant laboratory studies and the conduct of works - observed performance after one year of service.

Our plant-based binder has been the subject of a patent application.

161 明亮颜色的Bituclair和人工合成的着色结合料  
作者：法国，Colas S.A.（法国），Michel Ballié

COLAS has developed a light-colored, colorable synthetic binder called BITUCLAIR, designed for both cold and hot mix colored surfacing. The binder, developed by COLAS research teams, is translucent when applied in a thin film.

A wide range of binders has been studied in laboratories and in situ, designed to respond to the needs of road construction and urban development projects. BITUCLAIR is available as . • Anhydrous binder with penetration at 25°C between 20/30 and 160/220 tenths of mm for colored hot mix for all types of layer thickness as well as colored mastic asphalt. . • Highly modified elastomer anhydrous binder for asphalt mix and mastic asphalts that are applied in zones that undergo heavy-duty stress and strain. . • Emulsion water-based emulsion for surface dressings, micro asphalt surfacing, and cold mixes for all types of layer thickness.

The binders’ main rheological properties are presented along with the results of studies done on hot and cold asphalt mix.

In addition, the binder must be manufactured in a new industrial unit which is presented in this paper. Some recent projects are then commented on.

162关于沥青混凝土在寒冷地区的低温聚合特性的研究  
作者：中国，吉林省通讯与科学研究院，Zhongjun Zhuo

The major failure of asphalt pavement in cold area is the crack of low temperature; crack is often the beginning of the other failures. Practice has proved, crack on the pavement surface is relevant to the design method that lacks scientific method for the aggregate grading in the current specification of our country. This paper aims at dense grading asphalt concrete, through changing the passing rate of control diameter（ 4.75、2.36、0.075mm） , referring to American Super pave aggregate grading design and Belley law design and the current specification of our country, five kinds aggrate gradings have been chosen, through the asphalt compound tensile damage test of low temperature and asphalt compound line shrinking coefficient test to evaluate the flexible property and shrinkage property of compound of low temperature, and the test results will be used to evaluate the crack resistance of low temperature of asphalt compound. Study through the property test of low temperature for 5 kinds of gradings, the aggrate grading with" S " shape is corresponded to SHRP grading idea, and asphalt with the grading has the ideal crack resistance ability of low temperature, the study result has offered reliable theory basis for the cold area asphalt concrete pavement of our country with suitable aggregate grading.

163用冷沥青混合料铺筑白色或有色道路磨耗层：热沥青混合料的替代材料在隧道磨耗层上的应用  
作者：法国，Colas S.A.（法国），Jean-Eric Poirier

Coloured bituminous surfacings are used to make roads in urban or touristic areas more visually attractive and also for reasons of comfort and safety. In these materials black bitumen is replaced by a translucent synthetic binder, whose colour can easily be modified by pigments. This is done, for example, for the wearing course in tunnels.

In tunnels, these light-coloured surfacings are preferred to traditional black surfacings as they provide an improvement in visibility and safety with a lighting saving of approximately 30%. Using cold mix materials overcomes the problems posed by removal of the heat and fumes produced when hot mixes are laid.

This paper aims to present the results of research, which has let the development of two coloured emulsion products that are able to meet the specifications for tunnel wearing courses.

The first part of the paper deals with the development of a coloured micro surfacing with continuous or gap 0/6 grading. The laboratory mix design study is presented, and then a number of applications, both white and red, are described.

The second part of the paper deals with a light-coloured emulsion asphalt concrete with 0/6 grading that is laid with a paver in a thickness of 2 to 3 cm. The results of the laboratory studies which have established the performance of this product in terms of workability, rutting resistance and skidding resistance are described. We then present a worksite where the product was used. This product was awarded the Siemens Price for Innovation in 2001.

164迪拜市在应用沥青混合料过程中的经验  
作者：阿拉伯联合酋长国，迪拜市，Ali Ahmad Elian

The rapid expansion of the Dubai Road network provides distribution base for national and International markets. The existing network of nearly 2000 km includes over 1100 km of single carriageway and over 700 km of dual carriageway. Dubai has a significant investment in the existing highway system, and new roadways are continuously being added to the network. Asphalt-surfaced highways in Dubai have experienced early failures in the form of rutting and other distresses caused by heavy truck wheel loads in conjunction with high pavement temperatures. At high temperatures such as those experienced in Dubai, the mix stiffness can be extremely low and susceptible to shear deformation under heavy axle loads.

The primary objective of this research work was to develop mix design criteria to provide asphalt mixes suitable for Dubai traffic loading and environmental conditions. The laboratory evaluation of candidate mixtures was based on standard mix design methods followed by performance-based tests conducted on all the mixes. Aggregate form two different sources; two grads of asphalt cements, two different asphalt modifiers in addition to thirty-six different mix types were used in this study.

The mixture evaluation program used the following performance-based tests: . • Asphalt Pavement Analyzer . • Indirect Tensile Strength . • Corps of Engineers gyratory Compactor . • Resilient Modulus . • Beam fatigue . • Repeated shear constant height test (SHRP Shear Tester) . • Frequency sweep constant height test (SHRP Shear Tester) . • Repeated load accumulated strain test (Rapid Triaxial Test Apparatus)

Binder was also evaluated using rotational viscometer, pressure Aging vessel, dynamic shear rheometers, etc.

The results of these different tests showed some mixture types with certain aggregate and binder performs the best. These selected mixtures are expected to show good performance under heavy axle loads under prevailing high temperatures. Field trials were also constructed using the best-selected mixtures. Performance evaluation of these road tests were evaluated.

165菲律宾在道路建设过程中对火山灰的有效利用  
作者：菲律宾，公共建筑工程和高速公路部，Antonio V. Molano

The eruption of Mount Pinatubo in the Philippines in 1991 deposited a huge quantity (> 1.5 billion m3) of volcanic ash throughout the adjoining area. The material is abundant and accessible and thus large cost savings ought to be possible if suitable techniques for using it in civil engineering can be developed. Furthermore, the reduced haul, ease of winning and substitution for other materials will provide a large environmental benefit.

Laboratory studies have demonstrated that large savings can be gained from the use of the ash as a replacement for conventional fine aggregate in bituminous mixes for road surfacing. The study demonstrated the high resistance of trial mixes to deformation and confirmed the potential suitability of a rolled asphalt type of mix as an effective alternative to the widely used asphaltic concrete mixes. A full-scale experimental trial to confirm and extend the knowledge gained from the laboratory study was constructed and the performance (to date) is demonstrating that rolled asphalt (containing 53% ash) and asphaltic concrete (containing 17.5% ash) are both performing satisfactorily.

This paper describes the background to the research, the laboratory study leading to the mix design, the design of the surfacing for the full-scale trial, the construction of the trial and the performance of the surfacing to date, and makes recommendations for using volcanic ash in road building where suitable material is readily available.

166多孔渗水沥青道路在泰国的应用  
作者：泰国，Chulalongkorn大学，Ekapon Akarapanitkorn

Before the economic crisis, there was a high increase of economic growth. Therefore, the transportation was needed to be developed. Many streets were constructed; usually they were designed to be the dense grade asphalt pavement. However, as Thailand’s climate is influenced by monsoon, heavy rainfall is experienced most of the year, and as this method of design gives an impermeable pavement surface most of the time after a heavy rain, there is an excess rainwater left over the pavement surface due to insufficient time for it to drain-off sideways. This resulted in lowering of skid resistance of the road surface, spraying of water from fast-moving heavy vehicles, and reflection at night. All of which are the factors contributed to road accident. Porous asphalt pavement employing gap aggregate grading is considered to be able to improve all these malices exhibited by the afore-mentioned design.The purpose of this research is to study properties of porous asphalt concrete. The research also aims at identifying suitability of its application in Thailand. From the results, the porous asphalt concrete has a better capability to drain excess water from the pavement surface than that of dense grade asphalt concrete. It also improved the skid resistance between tyres and the surface of the pavement, eliminated spraying and reflection. When compared the working performance of the pavement to the cost of the binder, It was found that the most suitable binder is the mixture containing asphalt cement and 12% polymer (40% Styrene Butadiene Styrene, SBS, in resin) by weigh which is an equivalent of 4.8% SBS by weight.