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CONTENTS
1 General 9
2 Terms, Symbols and Codes 10
2.1 Terms 10
2.2 Symbols and Code names 11
3 Base 14
4 Materials 15
4.1 General Regulations 15
4.2 Road Petroleum Asphalt 15
4.3 Emulsified asphalt 16
4.4 Liquid petroleum asphalt 18
4.5 Coal tar 18
4.6 Modified asphalt 19
4.7 Modified asphalt emulsion 21
4.8 Coarse aggregate 23
4.9 Fine aggregate 25
4.10 Packing 26
4.11 Fiber stabilizer 27
5 Hot Mixed asphalt road surface 29
5.1 General 29
5.2 Preparation for construction 29
5.3 Mix design 31
5.4 Mixing of mixture 39
5.5 Transportation of mixture 41
5.6 Paving of mixture 41
5.7 Compaction and molding of asphalt road surface 43
5.8 Joints 45
5.9 Open for traffic and others 46
6 Asphalt Surface Treatments and Seal Coat 47
6.1 General regulations 47
6.2 Asphalt surface treatments by layer spread method 47
6.3 Upside seal coat 49
6.4 Downside seal coat 49
6.5 Slurry seal and microsurfacing 49
7 Asphalt Penetration Pavement 52
7.1 General 52
7.2 Material spec and usage 52
7.3 Construction preparation 55
7.4 Construction method 55
8 Pavement Constructed by Cold-mixed Asphalt Mixture 56
8.1 General 56
8.2 Material Ratio Design of Cold-mixed Asphalt Mixture 56
8.3 Construction of Pavement Constructed by Cold-mixed Asphalt Mixture 56
8.4 Cold Make-up Asphalt Mixture 57
9 Prime Coat and Tack Coat 58
9.1 Prime Coat 58
9.2 Tack Coat 59
10 Other Construction of Asphalt Pavement 61
10.1 General 61
10.2 Sideway for People and Non-power Vehicles 61
10.3 Packing Lot of Heavy-duty Vehicle and Public Transportation 61
10.4 Asphalt Pavement of Cement Concrete Bridge Surface 61
10.5 Construction of Steeled Bridge Pavement 62
10.6 Tunnel Asphalt Pavement of highway 63
10.7 Kerbs and Dam 63
11 Construction Quality Control and Inspection Acceptance 64
11.1 General Regulation 64
11.2 Material and Equipment Inspection before Construction 64
11.3 Auxiliary Test Section of a Highway 64
11.4 Quality Control and Inspection in Construction Process 65
11.5 Project Quality Inspection and Acceptance in the Period of Completed Project and Acceptance 73
11.6 Project Construction Summary and Quality Guarantee Period Management 79
Appendix A Climate Division on the Performance of Asphalt Road Surface 80
Appendix B Designing Methods on the Mix Ratio of Hot Mixed Asphalt Mixtures 85
Appendix C Designing Methods on the Mix Ratio of SMA Mixtures 98
Appendix D Designing Methods on the Mix Ratio of SMA Mixtures 101
Appendix E The Assessing Method on the Degree of Asphalt Compaction 103
Appendix F The Dynamic Management Methods on the Quality of Construction Engineering 106
Appendix G Quality process control and gross amount testing method of asphalt pavement
Appendix H Diction Directions in This Criterion
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1.0.1 This Specification has been worked out for the purpose of implementing guidelines of “aborative construction and quality upfront”, ensuring construction quality of asphalt pavement.
1.0.2 This code applies to the construction for all class of highway asphalt pavement of newly-built and modified.
1.0.3 The construction for asphalt pavement shall comply with national specifications for environmental and eco-system protection.
1.0.4 The construction for asphalt pavement shall require construction organization plan and ensure proper construction period. Asphalt pavement shall not be under construction when the air temperature is lower than 10℃(highway and arterial highway) or 5℃ (highway of other classes ) and in the condition of raining days and wet pavement.
1.0.5 Asphalt top coat shall be continuously constructed in order to avoid across interference of other procedures that may pollute asphalt layers as prevent pollution of construction and transportation.
1.0.6 The construction for asphalt pavement shall meet the needs of highway communication condition and climate condition in the constructing location. Climate zone shall be implemented in accordance with the zones in Appendix A.
1.0.7 The construction for asphalt pavement shall carry out good labour protection to ensure safety. Asphalt mixing plant shall provide fire-fighting equipments, so fire and smoke must be strictly forbidden during the whole process of mixing and using liquid petroleum asphalt. In the process of using coal tar pitch or avoid the skin from directly touching coal tar pitch that is harmful to health.
1.0.8 The laboratory for testing and examining asphalt pavement shall obtain relevant qualification by authentication. The experiment staff shall be certificate of operation, and apparatus or equipment shall be qualified according to certification.
1.0.9 The construction for asphalt pavement should positively adopt new technology, material and arts which have been testified by experiment and practice.
1.0.10 Besides complying with this Specification, the construction for asphalt pavement shall also comply with other relevant national condition and area can work out supplementary rules according to the fact. Provinces, cities, autonomous regions or engineering construction units can work out relevant technical guide according guide according to the fact, whose technical requirements should not be lower than the rules in this Specification.
2 Terms, Symbols and Codes
2.1 Terms
2.1.1 Asphalt binder. Asphalt cement
Asphalt binder is the generic name of asphalt material (including additive, modifier. etc.) used for cementation in asphalt mixture.
2.1.2 Emulsified bitumen (British), Asphalt emulsion, Emulsified asphalt (American)
Emulsified asphalt, also called asphalt emulsion, is a uniform asphalt product made from petroleum asphalt and water effected by emulsion of emulsifier and stabilizer.
2.1.3 Liquid bitumen (British), Cutback asphalt or fluxed asphalt, is an asphalt product made from petroleum asphalt diluted by solvent such as gasoline, petroleum oil and diesel oil, etc.
2.1.4 Modified bitumen (British), Modified asphalt cement (American)
Modified asphalt cement is an asphalt binder made by adding additive (modifier), such as rubber, resin, high molecular polymer, natural asphalt and grinded rubber powder, or other materials, for the purpose of improving the performance of asphalt or asphalt binder.
2.1.5 Modified emulsified bitumen (British), Modified asphalt emulsion (American)
Modified asphalt emulsion is an emulsion asphalt product made by adding polymer latex in the process of asphalt emulsion, or mixing polymer later with finished product of asphalt emulsion, or emulsifying polymer modified asphalt.
2.1.6 Natural bitumen (British), Natural asphalt (American)
Natural asphalt is petroleum asphalt, which exists in natural state, is formed by petroleum that is continuously squeezed by earth crust and changes gradually with contacting air and water in the nature. Mineral substances are often mixed in natural asphalt in certain proportion, which can be categorized into lake asphalt, rock asphalt, undersea asphalt, oil shale, etc.
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