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道路石油沥青技术指标分析
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First phase (total 163rd phases) road engineering in February 2004

Shanxi Science & Technology of Communications

SHANX, I, SC, IENCE & TECHNOLO, GY, O, F, COMM, UN,, ICAT, I, NS, O

No. 1., Feb

Technical index analysis of road petroleum asphalt

Yu Wenjing, Zhang Xiaoyan, Kong Fansheng

(Shanxi Institute of traffic Sciences, Shanxi, Taiyuan 030006)

In recent years, China's 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 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 promulgation 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 road quality factors 1. 1.1 load factors

With 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 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 shrinkage 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 mixture

Received date: 2003212201 yuan;

Author: Yu Wenjing (1937-), male, Jiangsu Nanjing people, technical adviser, in 1955 graduated from the Nanjing highway engineering school, 1967 graduated from the Xi'an highway Zhang Xiaoyan (1970-), female, Shanxi Wuzhai, deputy director, senior engineer, in 1992 graduated from the Xi'an Institute of highway; hole (1977-), male, prosperous Shanxi Jiexiu, assistant engineer, in 2000 graduated from the Xi'an highway university.

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Abstract: the use of road requirements, crude oil quality and asphalt production technology is an important factor 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: asphalt; index; technology;

Analysis of CLC number: U 414.75, document identification code: A, article number: 100623528 (2004) 0120001205

The 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 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 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 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 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 characterization 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 relevant 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 contain

2?

Shanxi communications science and technology 2004 first

1.3 asphalt production process factors 1., 3.1 distillation

Medium crude oil with low wax content, China's 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 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 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 0.42

The chemical composition of suitable 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 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 method

Through the preparation of different crude oil or crude oil processing products, 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 in China are listed in table 2.

Heavy traffic asphalt production capacity of T million of crude oil imports 40 crude oil imports 30 crude oil imports 10 in Huanxiling oil mixture of 80 crude oil imports 60 Xinjiang, 30 Xinjiang Changqing Oil No. 0, No. nine and Karamay No. 0 Xinjiang District 130 heavy crude oil 10 LIN-SHANG crude oil 10, oil 25, Jinzhou orimulsion oil Bohai Oil 30, Bohai Orimulsion Oil 30 Bohai 150 Bohai Suizhong Suizhong oil 36- oil 36- 170 Bohai Suizhong 120 Bohai Suizhong oil 36- oil 36- 150565 raw materials

Table 2 the domestic production of heavy traffic asphalt refinery plant in trademark production process of distillation, distillation, oxidation, oxidation of solvent distillation, distillation, oxidation and oxidation distillation distillation, oxidation, solvent distillation, oxidation distillation and distillation, oxidation, oxidation, and solvent distillation, distillation, oxidation and oxidation distillation, oxidation distillation, distillation, oxidation, oxidation, oxidation and oxidation distillation distillation

Qilu Shengli Refinery of Qilu Petrochemical Industries Co Maoming Petrochemical Co refinery of Nanhai petrochemical plant in Guangzhou petrochemical plant of Liaohe Petroleum Exploration Bureau of Huanxiling oil chemical plant in the East China Sea Lanzhou Zhenhai Refinery flying Xinjiang Petroleum Management Bureau of Karamay refinery pterosaur Dushanzi refinery refinery of Guangdong petroleum Ji'nan Tianshan rich fuel company rich Jiangyin Hing Hing asphalt plant Qinhuangdao petroleum chemical plant deer brand Panjin northern asphalt Co. Ltd., CNOOC Ltd. Qingdao Guangyuanfa thoroughfare asphalt asphalt plant in Taizhou petrochemical plant in Binzhou chemical plant in the total

1.4 asphalt modification factors

With the rapid development of the technology of asphalt pavement, in order to meet the needs of heavy load, environmental protection and traffic safety, open graded, semi open gradation asphalt layer, application layer wear, requirements of asphalt has stronger cohesion and adhesion, and have better temperature stability. The asphalt material single has been unable to meet the needs of the development of modified asphalt modified asphalt application generally increased, technical indicators not only increased the adhesion, toughness, elastic recovery test items, softening point, viscosity and ductility at low temperature of 60 DEG C and other indicators should be a substantial adjustment, heat aging conditions from 163 DEG C 5, h to 185 DEG C, 2.5 h. The modification effect of asphalt depends on the chemical composition of the matrix asphalt and the compatibility with the modifier, and is related to the varieties, dosage and production process of the modifier. The requirement of technical parameters of matrix asphalt after modified asphalt,

And the formulation of reasonable technical indexes of different modified asphalt is a problem that needs to be discussed.

2 foreign asphalt classification technology standards

The current international road asphalt grading standards there are 3 kinds of methods: classification standard mainly adopts 25 C national penetration grade in Europe and Japan, America, and 60 DEG C, America, Australia and Canada, viscosity grade road performance of PG grade beauty 2.1 American road asphalt grading index of American road asphalt 3 grading method of GM, and the penetration grading (A STM D 946- 99 (A), STM D 3381 viscosity grade (99), grade (A STM D 6373 - 99), AA SH TO PG PP 6). 2., 1.1 viscosity (A, C) classification, the United States according to asphalt 60 degrees of viscosity difference, the asphalt is divided into six grades (table)

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2004 issue first

Yu Wenjing, et al. Analysis of technical indexes of road petroleum asphalt

3?

3) under the same viscosity index at 60 DEG C, the asphalt is sticky at 135 DEG C

After T, FO and T, the asphalt is controlled at 60 DEG C viscosity and 25 DEG ductility

Degrees, degrees of penetration are different, and are divided into two categories. The United States A C 25 index has no softening point and wax content index, and the asphalt thermal aging index is adopted

A C- 2.5 A B 250 + 5012580220200163 A C- 5 A B 500 + 100175110140120177

Relatively few items.

Table 3 the AST D viscosity grade 3381- 99 road asphalt (Tables 1 and 2 with M) test viscosity (60 C) Pa? S viscosity (135 DEG C), not less than CST penetration (25 C), not less than DMM flash point, not less than C solubility, viscosity (not less than 60 DEG C%), not less than Pa? S ductility (25 C), not less than cm

A C- 10 A B 1000 T FO + 2002501508070219 T C- 20 A B 50007550 A 2000 + 400300210604099.01 250100250010000502 1500040200002510 A C- 30 A 3000 + 60035050232 A C- 40 A B 4000 + 8004003004020

2., 1.2, PG performance indicators

The strategic highway research program (SHR P) in 1987 to 1993 of 5 A on the road to high and low temperature fatigue according to the asphalt pavement aging adaptability and performance requirements, the performance of asphalt (PG) grading standards (Table 4). The standard completely abolished the traditional asphalt by penetration, viscosity classification concept, based on the dynamic shear test, calculate the original asphalt, FO asphalt T samples to satisfy T shear rheology strength of 3 G sin? And the temperature of asphalt will be divided into 7 levels according to the adaptation to high temperature; T FO T + PAV samples meet the temperature creep stiffness and direct tensile failure strain index, and the asphalt is divided into a number of low temperature adaptation level, which will be by the use of asphalt

Grade

PG4640 3446101622

Can be divided into 37 temperature levels. Two

2 European standards, the European Union countries road asphalt by needle penetration is divided into 9 grades (Table 5). In the EU standard, reflecting the high-temperature performance indexes of asphalt softening point, dynamic viscosity and kinematic viscosity C C and other indicators reflect the low temperature performance of asphalt 60135 is brittle point and wax content index, and by 2.2%, 5% will allow the wax content of asphalt is divided into two categories. The 4. performance indexes of asphalt thermal aging are R, T, FO, T, the change of quality, residual penetration and softening point. The temperature sensitivity of asphalt is controlled by penetration index P, I value, and the value of P I is 1.5 + 0.7. ~

Table 4 specification for SHRP bituminous binders (AST, D, 6373-99) M

PG5228 3440461622, PG5828 34401016, PG6422 283440

The average design temperature is 7 d, the minimum design temperature is C, and the design temperature is C.

Minimum flash C T48 viscosity maximum 3 Pa? S A STM D test temperature 4402 T P5 3 G sin dynamic shear test temperature? A minimum of 1 kPa (10 rad s) C physical hardening index H% weight loss, maximum dynamic shear T P5 3 G sin? 2.20 kPa minimum temperature test (10 rad s) C

Less than 46 less than 52 less than 58 less than 64 greater than greater than greater than greater than greater than greater than greater than greater than greater than greater than greater than - 34 - 16 - 22 - 10 - 16 - 22 - 28 - 34 - 40 - 46 - 16 - 22 - 28 - 34 - 40 - 10 - 16 - 22 - 28 - 34 - 40 of the original 230 asphalt

1355864

Forty-six

Fifty-two

Presentation

1.005864

R, T, FO, T, residual bitumen

Forty-six

Fifty-two

PAV residual asphalt 9016131072522100, 19161331282510022, 1916

PAV aging temperature dynamic shear T P5 3 G sin? 5000 kPa maximum temperature (10 rad s) C T P1 S maximum creep stif