道路石油沥青技术指标分析.docx
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1、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 engineering in February 2004Shanxi Science & Technolog
2、y 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 recent years, Chinas highway construction as the
3、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 T, the domestic heavy traffic asphalt asphal
4、t 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 promulgation and implementation of the (hereinafter
5、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 road quality factors 1. 1.1 load factorsWith
6、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 indexes, penetration, temperature, ductility a
7、nd 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 shrinkage cracking and temperature fatigue crack.
8、 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;Author: Yu Wenjing (1937-), male, Jiangsu Nanji
9、ng 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 highway; hole (1977-), male, prosperous Shanx
10、i 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 in determining asphalt technical indicators.
11、 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: asphalt; index; technology;Analysis of CLC num
12、ber: 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 stability of the asphalt material; through the
13、 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. With the increase of voids in the design of su
14、rface 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 avoid the effect of water damage of asphalt
15、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 to ensure the water stability of asphalt mat
16、erials. 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 characterization of asphalt materials after the possibilit
17、y 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 relevant indicators, the American PG standard colum
18、n 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 distillationMedium crude oil with low wax content, Ch
19、inas 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 crude oil is mainly the nature of the project de
20、nsity (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 Sui (Huan Xiling) red mouth, 36-1 nine 0.962
21、 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 crude oil can be obtained by direct distill
22、ation (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 asphalt, so as to meet the requirements of
23、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 products, change the asphalt composition, so as to
24、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 in China are listed in table 2.Heavy traffic
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- 道路 石油 沥青 技术指标 分析
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