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Delivery: <= 15 days. True-PDF full-copy in English will be manually translated and delivered via email. JTGD50-2017: Specifications for Design of Highway Asphalt Pavement Status: Valid JTGD50: Historical versions
Basic dataStandard ID: JTG D50-2017 (JTGD50-2017)Description (Translated English): Specifications for Design of Highway Asphalt Pavement Sector / Industry: Highway & Transportation Industry Standard Classification of Chinese Standard: P66 Classification of International Standard: 93.080.20 Word Count Estimation: 77,745 Date of Issue: 2017-03-20 Date of Implementation: 2017-09-01 Older Standard (superseded by this standard): JTG D50-2006 Issuing agency(ies): Ministry of Transport Summary: This standard applies to all grades of highway construction and renovation of the asphalt pavement design. JTGD50-2006: Specifications for design of highway asphalt pavement---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Specifications for Design of Highway Asphalt Pavements INDUSTRY STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA Issued on October 10, 2006 Implemented on January 01, 2007 Issued by the Ministry of Communications of the People's Republic of China Edited by. CCCC Highway Consultant Co., Ltd. Approved by. The Ministry of Transport of the People's Republic of China Effective Date. January 01, 2007 In order to fulfill international projects, as well as to further the international exchange in the field of highway technology and standardization, the English edition of the prevailing Chinese standards of highway construction is compiled and translated from the current Chinese edition under the authorization of the Ministry of Transport of the People's Republic of China and with the sponsorship of the Export-Import Bank of China and the China Communication Construction Company Limited (CCCC). The work was launched by the Steering Committee jointly chaired by Mr. Li Shenglin. Minister of Transport and Mr. Li Ruogu, Chairman of the board and president of the Export-Import Bank of China. The coordination for the translation, compilation and other relevant works was carried out under the leadership of Mr. Zhou Jichang, Chairman of the board of CCCC. The primary English edition was provided by the Leading Editor of the Chinese edition. The review, final editing and overall compilation was assigned to the China Road and Bridge Corporation. The final English edition of the Specifications For Design Of Highway Asphalt Pavement (JTG D50-2006) was reviewed and compiled by Mr. Zhang Qinghong. approved by Mr. Yao Haidong. and was published and issued by Standards Press of China. Comments, suggestions and inquiries are welcome and shall be addressed to. Leading Editor of Chinese Edition. CCCC Highway Consultants Co., Ltd. (Address. No. 85 Deshengmenwai Dajie.Beijing. Postal Code.100088). Leading Editor of English Edition. China Road and Bridge Corporation (Address. 88C Andingmenwai Dajie. Beijing, Postal Code. 100011). The Ministry of Transport of the People's Republic of China Public Notice No. 39.2006 On Release the Specifications for Design of Highway Asphalt Pavement (JTG D50-2006) It is hereby to issue the Specifications for Design of Highway Asphalt Pavement (JTG D50-2006). to go into effect on January 1st,2007. The former Code for Design of Highway Asphalt Pavement (JTJ 014-97 ) shall be superseded from the same date. The general administration and final interpretation of the specification belong to the Ministry of Transport. The Chief Development Organization. CCCC Highway Consultants CO. , Ltd. is responsible for particular interpretation for application and routine administration Comments, suggestions and inquiries are welcome and shall be addressed to the Leading Editor. CCCC Highway Consultants CO. , Ltd. (No. 33, Qianchaomian Hutong. Dongsi. Beijing, post code. 100010. Tel. 010-65237331). The feedbacks will be used as reference in future revisions. The Ministry of Transport of the People's Republic of China October 10. 2006 ForewordSince its issuance and implementation, the Code for Design of Highway Asphalt Pavement (JTJ 014-97) has played a major role in improving the quality of asphalt pavement design. But with the continuous development of highway construction and advancement of asphalt pavement technology, parts of the Code are unable to meet the actual requirements, further revision and improvement is needed. According to the requirements for code revisions by the Ministry of Transport, a revision panel chaired by CCCC Highway Consultants CO. , Ltd and included related universities, research institutes, and design institutes, was formed. The revision panel summarized the recent practical engineering experience and research results and performed extensive research and investigation. After repeated reviews and considerations, the Specifications for Design of Highway Asphalt Pavement (JTG D50-2006) has been finalized to supersede the former "Code". This Specification consists of 11 Chapters and 7 Appendices. The major revisions compared to the former code include. 1. Emphasis on traffic load analysis and forecast according to the actual situation and the concept of life cycle costs for pavement design. 2. Took technical measures to prevent early damage, strengthened the requirements for the material, mixture and combination design of pavement structure, and added design elements for flexible base and lean concrete base; 3. Subdivided the mixture gradation type of semi-rigid base course, adjusted aggregate gradation range, and added the frost resistance design requirements for fly-ash and lime stabilized aggregate. 4. Improvements were made in parameters' value-taking for pavement thickness calculation and the formula for existing road strengthening. 5. Increased the design content of asphalt surfacing on existing cement concrete pavement. 6. Added design content of asphalt pavement on concrete bridge deck, etc. Comments, suggestions and inquiries are welcome and shall be addressed to the chief editor (address. 33 Qianchaomei Hutong, Dongsi District, Beijing, post code. 100010; Tel. 010-65237331, E-mail. ssso@hpdi.com.cn) so that they can be used as references in future revisions. Leading Editor. CCCC Highway Consultants Co. ,Ltd. Co-editors.Harbin Institute of Technology Chang'an University Jiangsu Transportation Research Institute CO. , Ltd. Sichuan Provincial Communications Department Planning Survey Design Research Institute Changsha University of Science and Technology Shandong Communications Science Research Institute Persons in Charge.Yang Mengyu.Feng Decheng.Sha Aiming,Fu Guanhua.Cui Shibin. Zhou Zhigang. Wang Lin.Contents1 General... 1 2 Terms and Symbols... 2 2.1 Terms... 2 2.2 Symbol...4 3 General Provisions... 5 3.1 Standard Axle Load and Design Traffic Volume... 5 3.2 Road Materials... 8 4 Structure Courses and Combination Design...11 4.1 Structure Courses Design...11 4.2 Structure Combination Design... 13 5 Subgrade and Bed Course...15 5.1 Subgrade Resilience Modulus...15 5.2 Design for Bed Course and Anti-freezing Course...20 6 Base Course and Subbase Course... 23 6.1 Semi-Rigid Base and Subbase Course... 23 6.2 Flexible Base Course and Subbase Course... 27 6.3 Rigid Base... 29 7 Asphalt Surface Course... 30 7.1 Asphalt Mixture Surface Course...30 7.2 Asphalt Penetration Type Pavement and Surface Treatment...33 8 Thickness of New Pavement Structure... 35 9 Pavement Reconstruction Design... 42 9.1 General Provisions... 42 9.2 Asphalt Pavement Resurfacing...42 9.3 Cement Concrete Pavement Resurfacing with Asphalt...47 10 Drainage Design... 49 11 Bridge Deck Pavement and Other Works...54 11.1 Bridge Deck Pavement...54 11.2 Other Works... 56 Appendix A Vibration Moulding Process for Samples of Semi-rigid Base Material and Anti-freezing Test Method...57 A.1 Vibration Moulding Process for Samples of Semi-rigid Base Material... 57 A.2 Anti-freezing Test Method for Semi-rigid Base Material...61 Appendix B Relevant Data in Climatic Region...65 Appendix C Asphalt Mixture Mineral Grading, Specifications and Dosage and Asphalt Penetration Type and Asphalt Surface Treatment Materials...71 Appendix D Gradation Composition of Non-binder Materials... 75 Appendix E Reference Data for Material Design Parameters... 77 Appendix F Estimation of Resilient Modulus for Earth Foundation by Lookup Table Method...79 Appendix G Wording Explanation for This Standard...871 General1.0.1 This Specification is prepared with the purpose of meeting the development of highway construction, making the asphalt pavement meet service requirements, guaranteeing the quality of pavement, and improving the durability of pavement. 1.0.2 This Specification is applicable for the asphalt pavement design in the construction and reconstruction of all classified highways. Accommodation highway can use this Specification as a reference. 1.0.3 Asphalt pavement design consists of works of the survey, analysis and forecast of traffic volume, material selection, mixture design, test and determination of design parameters, combination design of the pavement structure and thickness calculation, design of pavement drainage system, and the design of other pavement engineering, and the work of providing the recommended scheme based on comprehensive comparison of technology and economy of pavement structure schemes. 1.0.4 The asphalt pavement of Expressway and Class-1 highways should not be constructed in stages. Sections of highway which may possibly have significant settlement such as soft soil area, high fill subgrade, loess collapsibility area, and highway with low traffic volume at the early stage can be "designed entirely and constructed by stages". 1.0.5 Asphalt pavement design shall follow the following principles. 1 Survey and collect on-site information, analyze and predict traffic loads, and design the pavement based on the concept of life cycle cost. 2 Survey and master subgrade characteristics along the route, soil quality, and wetness type of subgrade. Perform the integrated design of the subgrade and pavement after consideration of the soil improvement for sections with poor geologic conditions. 3 Follow the principles of adjusting measures to local conditions , selecting the material, and saving the resources. choose the pavement structure scheme that has advanced technology, reasonable economy, reliable safety, and is convenient to construct. 4 Consider the local conditions, actively and circumspectly promote new techniques, structure, materials and new technologies, and carefully pave the test road, summarize the experience, make improvements continuously, and promote the achievements step by step. 5 The related provisions of the national environmental protection should be followed, the safety and health of the related personnel must be protected; attentions should be paid to the recycle of materials and handling of wasted materials. 1.0.6 The index and parameters in the Specifications have certain prerequisites and application conditions, which should be applied rationally in specific designs with considerations of engineering practice to ensure the quality of the projects. 1.0.7 For the pavement structure in special areas like perennially frozen soil, desert, saline soil, expansive soil, and so forth, pavement should be designed according to the provisions in this Specification and in combination with practical experience, giving consideration to factors such as local climate, hydrology, soil property, materials, and so forth. 1.0.8 The design of pavement should conform to not only this code, but also to current relevant national and industrial standards and specifications.2 Terms and Symbols2.1 Terms 2.1.1 Asphalt pavement The pavement structure paved with asphalt surface course. 2.1.2 Semi-rigid base The base paved by aggregate or earth materials, which were stabilized by inorganic binding agent. 2.1.3 Rigid base The base paved by the materials of common concrete, roller compacted concrete, lean concrete, reinforced concrete, continuously reinforced concrete, and so forth. 2.1.4 Flexible base The base paved by hot or cold mixed asphalt mixture, asphalt penetration crushed stone and granular materials without any hinder. Granular materials include graded crushed stone, graded gravel, natural granule which complies with gradation, graded crushed gravels which are made by crushed gravels mixed with natural gravels, clay-bound macadam, marl-bound macadam and gap choked crushed stone, etc. 2.1.5 Axle load spectrum Probability distribution of different axle loads of various vehicles. 2.1.6 Equivalent effect numbers of single axle loads Based on the principle of deflection equivalent or tension stress equivalent, different effect numbers of axle loads from different types of vehicles are converted into equivalent effect numbers of single axle loads with the standard axle load 100kN. 2.1.7 Equivalent effect numbers of cumulative axle loads The total equivalent effect numbers of axle loads of one lane within the design period, after taking the lane coefficient into consideration. 2.1.8 Design life span Reference time in calculating the equivalent effect numbers of cumulative axle loads. 2.1.9 Freezing index It is the cumulative value of daily average minus temperature in a year. 2.1.10 Design deflection It is the design deflection on pavement surface determined by the equivalent effect numbers of cumulative single axle loads of one lane, highway classification, and pavement structure type within the design period. 2.1.11 Maximum grain size Minimum standard sieve opening size through which the passing rate of mixture is 100% . 2.1.12 Nominal maximum grain size Minimum standard sieve opening size through which the passing rate of mixture is between 90%~100% . 2.1.13 Seal coat The asphalt thin course that is paved on the asphalt surface course, on the base, or between asphalt courses to prevent rainwater from seeping downward. 2.1.14 Slurry seal coat Stone chips or sands and fillers(cement, lime, fly ash, stone powder, etc,)that have a certain gradation are mixed with emulsified bitumen, admixture, and water based on certain ratios to form a flowable mixture, which is then evenly spreaded onto the pavement surface. 2.1.15 Micro-surfacing Stone chips or sands and fillers(cement, lime, fly ash, stone powder, etc.)that have a certain gradation are mixed with emulsified bitumen modified by polymer, admixture, and water based on certain ratios to form a flowable mixture, which is then evenly spreaded onto the pavement surface. 2.1.16 Tensile strength structural coefficient It is the safety coefficient of the asphalt mixture, semi-rigid material under the fatigue action, which is determined by the ratio of failure strength under one-off loading and the failure strength under different stresses of fatigue action, and factors of highway classification, and differences between lab and field, etc should also be considered. 2.1.17 Tolerated tension stress It is the ratio of ultimate tensile strength of the mixture to the tensile strength structure coefficient. 2.1.18 Deflection combined correctness factor It is the ratio of the site tested deflection value to the theoretical deflection value. 2.1.19 The most unfavorable season It is the season in which the subgrade and pavement structure is in the most unfavorable situation. 2.1.20 Non-disadvantageous season It is any season except the most unfavorable season. 2.2 Symbol AC -- Dense gradation asphalt mixture AC-C -- Dense gradation coarse asphalt mixture AC-F -- Dense gradation fine asphalt mixture SMA -- Asphalt mastic macadam mixture OGFC -- Open gradation asphalt wearing course (Open graded friction course) AM -- Semi-open gradation asphalt macadam ATB -- Dense gradation asphalt stabilized macadam (Asphalt treated base) ATPB -- Open gradation asphalt stabilized macadam (Asphalt treated permeable base)3 General Provisions3.1 Standard Axle Load and Design Traffic Volume 3.1.1 The pavement design should use 100kN of single axle load with two wheels as the standard axle load, expressed as BZZ-100. The calculation parameters of standard axle load are determined according to Table 3.1.1. Table 3.1.1 Calculation Parameters of Standard Axle Load Standard axle load BZZ-100 Standard axle load BZZ-100 Standard axle load P (kN) 100 Equivalent round diameter of a single tyre pressure transmitting area d (cm) Tire contact pressure p (MPa) 0.70 Centre distance between two tyres (cm) 1.5d For highways that are mainly used by heavy vehicles carrying coal or construction materials, the design calculation parameter should be selected specifically based on the actual conditions after evaluation. 3.1.2 Axle loads of different types of vehicles should be converted into equivalent effect numbers of single axle loads of standard axle load BZZ-100. 1 When the design deflection, and tension stress on the bottom of the asphalt course are used as indexes, the axle load at various rating should be converted into equivalent effect numbers (N) of standard axle load P according to Formula (3.1.2-1). Where. N-Eequivalent effect numbers of single axle loads (numbers/d) of standard axle load when the design deflection and tension stress on the bottom of asphalt course are regarded as indexes. ni-Effect numbers (numbers/d) of axle load of various rating vehicle type being converted . P-Standard axle load (kN); Pi-Axle load (kN) of various rating vehicle type being converted; C1-Axle number factor of the vehicle type being converted; C2-Tyre group factor of the vehicle type being converted, it is 1.0 for twin-tyre group, 6.4 for single tyre group and 0.38 for four-tyre group; ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of JTGD50-2017_English be delivered?Answer: Upon your order, we will start to translate JTGD50-2017_English as soon as possible, and keep you informed of the progress. The lead time is typically 11 ~ 15 working days. 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