道路石油沥青技术指标分析.doc
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1、【精品文档】如有侵权,请联系网站删除,仅供学习与交流道路石油沥青技术指标分析.精品文档.道路石油沥青技术指标分析This article is contributed by zhangxin198302Pdf documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view.First phase (total 163rd phases) road engineerin
2、g in February 2004Shanxi Science & Technology of CommunicationsSHANX, I, SC, IENCE & TECHNOLO, GY, O, F, COMM, UN, ICAT, I, NS, ONo. 1., FebTechnical index analysis of road petroleum asphaltYu Wenjing, Zhang Xiaoyan, Kong Fansheng(Shanxi Institute of traffic Sciences, Shanxi, Taiyuan 030006)In recen
3、t years, Chinas highway construction as the center (by the end of 2003 the national highway mileage will reach 30 thousand km), to obtain the rapid development of highway construction, highway asphalt demand is increasing year by year, the 2002 national road asphalt dosage is 8 million 200 thousand
4、T, the domestic heavy traffic asphalt asphalt 4 million 600 thousand T, 1 million 400 thousand T, imported asphalt content 2 million 200 thousand T, the 2003 national road asphalt amount will be more than 9 million T. Road asphalt technical requirements of the Ministry of Communications the promulga
5、tion and implementation of the (hereinafter referred to as the new standard) is to improve the asphalt quality standards for the correct understanding of the new standard of asphalt technical indicators, analysis research is necessary.1 determine the asphalt road technical indicators of factor 1.1 r
6、oad quality factors 1. 1.1 load factorsWith the increase of the traffic volume and the increase of axle load, to reduce the fatigue damage of pavement load, the pavement needs better asphalt material with reasonable consistency, cohesive force and viscoelasticity. In traditional asphalt technical in
7、dexes, penetration, temperature, ductility and wax content reflect the adaptability of asphalt to loading factors. 1., 1.2 temperature factors, asphalt pavement under design load, in the high temperature does not produce plastic flow (bag, Che Zhe), low temperature does not produce temperature shrin
8、kage cracking and temperature fatigue crack. In the traditional asphalt technical indexes, the high temperature performance requirements of asphalt are expressed by the softening point of asphalt, the viscosity of C DEG C, and the rutting index of 60 asphalt mixtureReceived date: 2003212201 yuan;Aut
9、hor: Yu Wenjing (1937-), male, Jiangsu Nanjing people, technical adviser, in 1955 graduated from the Nanjing highway engineering school, 1967 graduated from the Xian highway Zhang Xiaoyan (1970-), female, Shanxi Wuzhai, deputy director, senior engineer, in 1992 graduated from the Xian Institute of h
10、ighway; hole (1977-), male, prosperous Shanxi Jiexiu, assistant engineer, in 2000 graduated from the Xian highway university.Tsinghua Tongfang Optical Co. Disc Ltd. All rights reserved.Abstract: the use of road requirements, crude oil quality and asphalt production technology is an important factor
11、in determining asphalt technical indicators. According to the domestic comparative test data, the differences of the technical indexes of road asphalt at home and abroad are discussed, and the rationality of the new technical requirements of road petroleum asphalt in China is analyzed. Key words: as
12、phalt; index; technology;Analysis of CLC number: U 414.75, document identification code: A, article number: 100623528 (2004) 0120001205The low-temperature bending strain index to reflect the requirements of low-temperature performance of asphalt; penetration index P I reflected by the temperature st
13、ability of the asphalt material; through the relationship between asphalt grading and climatic zoning reflects changes in temperature range of asphalt technical indicators. 1., 1.3 pavement structure factors, different types of pavement structure have different stress state and forming mechanism. Wi
14、th the increase of voids in the design of surface layer mixture (open graded O GFC, the design void ratio is greater than 18%), the adhesive force (60 DEG C) of asphalt is required to be stronger, and the softening point, consistency and adhesiveness are higher. 1.4 factors and 1. water in order to
15、avoid the effect of water damage of asphalt pavement, the pavement should meet the requirements of overall dense water requirements, and the adhesion of asphalt and aggregate grade, mixture strength after immersion and freeze-thaw splitting test, immersion rutting test of asphalt film falling index
16、to ensure the water stability of asphalt materials. Aged 1. 1.5 construction and the use of asphalt asphalt heating factors and mixed temperature of mixture and construction of 160 to 165 DEG C, so the technical indexes of asphalt in a series of 163 C and H (T FO T) film heating aging characterizati
17、on of asphalt materials after the possibility of asphalt sample related technology indicators of the 5. The asphalt material used in aging interaction with air, ultraviolet, water, mainly affect the asphalt pavement surface, the traditional asphalt technical standards are not included in the relevan
18、t indicators, the American PG standard column pressure aging (PAV) test project. 1.2 crude oil quality factors suitable for refining road asphalt crude oil, usually ring alkyl and contain2?Shanxi communications science and technology 2004 first1.3 asphalt production process factors 1., 3.1 distillat
19、ionMedium crude oil with low wax content, Chinas crude oil output in recent years is about 160 million T, crude oil imports of about 40 million T, of which the production of road asphalt suitable for domestic oil sources, as shown in table 1.Table 1 China suitable for road asphalt production of crud
20、e oil is mainly the nature of the project density (20 C) g? Cm 3 viscosity (50 C) mm 2? S- 1 m KO H acid G? G - 1 point C char% ash% penetration point C saturates aromatics% asphaltene colloidal wax the content of sulfur content% ammonia content% Karamay Liaohe oilfield (Jiangsu, ur Shanjiasi Bohai
21、Sui (Huan Xiling) red mouth, 36-1 nine 0.962 0.941 0.975 0.9598 339.65631 area) 653.5543 3.12 4.64 3.61139132176144 7.51 7.04 12.4 8.98 0.024 0.058 0.385 0.019 12-2 35.3 25.2 37.9 19-20 18.7 22.8 21.44 1.5 0.49 1.84 1.95 1.5 1.42 1.85 2.78 0.24 0.34 0.31 0.13 0.42The chemical composition of suitable
22、 crude oil can be obtained by direct distillation (direct distillation of bitumen) with constant pressure and reduced pressure distillation. The production of qualified road asphalt 1., 3.2 oxidation of residual oil or soft asphalt, by blowing into the air, adjusting the structure and composition of
23、 asphalt, so as to meet the requirements of the technical standards. 1., 3.3 solvent stripping, using solvent to remove the light oil in asphalt, and reduce wax content, produce qualified asphalt.1. and 3.4 harmonic methodThrough the preparation of different crude oil or crude oil processing product
24、s, change the asphalt composition, so as to meet the requirements. In the above 4 production processes, the bitumen produced by single distillation process has lower cost and stable performance. The asphalt production process, production capacity and crude oil conditions of major asphalt refineries
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