CJJ 43-1991 Hot mix recycled asphalt pavement construction and acceptance regulations
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Engineering Construction Standard Full-text Information System
Industry Standard of the People's Republic of China
Hot Mix Recycled Asphalt Pavement
Construction and Acceptance Regulations
CJJ43—91
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Industry Standard of the People's Republic of China
Hot Mix Recycled Asphalt Pavement
Construction and Acceptance Regulations
CJJ43—91
Editor: Shanghai Municipal Engineering Research Institute Approval Department: Ministry of Construction of the People's Republic of China Effective Date: February 1, 1992
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Notice on the Release of the Industry Standard "Hot Mix Recycled Asphalt Mixture Pavement Construction and Acceptance Procedures" Construction Standards [1991] No. 431
Construction Committees (Construction Departments) of all provinces, autonomous regions, and municipalities directly under the Central Government, Construction Committees of independently planned cities, and relevant ministries and commissions of the State Council:
According to the requirements of the former Ministry of Urban and Rural Construction and Environmental Protection (84) Chengkezi No. 153, the "Hot Mix Recycled Asphalt Mixture Pavement Construction and Acceptance Procedures" edited by the Shanghai Municipal Engineering Research Institute has been reviewed and approved as an industry standard, numbered CJJ43-91, and will be implemented from February 1, 1992.
This standard is managed by the Beijing Municipal Design and Research Institute, the technical unit responsible for urban road and bridge standards of the Ministry of Construction, and its specific interpretation and other work is the responsibility of the Shanghai Municipal Engineering Research Institute.
This standard is organized and published by the Standard and Quota Research Institute of the Ministry of Construction. Ministry of Construction of the People's Republic of China
June 27, 1991
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Chapter 1
Chapter 2
Requirements for Base Course
Chapter 3 Raw Materials
Section 1 Used Asphalt Materials
Section 2 Regeneration Agent·
Section 3 Asphalt
Section 4 Mineral Materials
Chapter 4 Excavation of Old Asphalt Roads
Chapter 5 Proportion Design of Regenerated Asphalt Mixture Section 1 Determination of the Amount of Regeneration Agent
Section 2 Proportion Design of Regenerated Asphalt Mixture…Chapter 6 Preparation of Regenerated Asphalt Mixture
Section 1 Preparation of Regenerated Asphalt Used Materials
Section 2
Separate Mixing Process·
Section 3
Continuous mixing process·
Section 4
Chapter 7
Chapter 8
Appendix 2
Appendix 3
Appendix 4
Appendix 5
Appendix 6
Appendix 7
Pavement construction
Quality standards and inspection and acceptance
Explanation of terms in this code
Test method for extraction of asphalt mixture
Reflux heating method
Test method for asphalt recovery (modified Abelson method) Determination method for physical and mechanical indicators of asphalt mixture Determination method for saturation rate
Example of mix design of recycled asphalt mixture
Explanation of terms used in this code
Additional explanation
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Chapter 1 General Provisions
Article 1.0.1 This specification is specially formulated to promote the use of recycled asphalt mixtures, save raw materials and energy, and ensure the quality of recycled asphalt pavement projects. Article 1.0.2 This specification applies to the preparation and pavement construction of hot-mixed coarse-grained and medium-grained recycled petroleum asphalt mixtures (hereinafter referred to as recycled asphalt mixtures). The road performance of recycled asphalt mixtures is the same as that of ordinary hot-mixed petroleum asphalt mixtures (hereinafter referred to as ordinary asphalt mixtures), and they can be used equally in pavement structures. Recycled asphalt products with a quality lower than that of ordinary asphalt mixtures are not within the scope of application of this specification.
Article 1.0.3 The quality of mineral materials and asphalt used in recycled asphalt mixtures and the technical requirements of their mixtures shall comply with the provisions of the current "Specifications for Construction and Acceptance of Asphalt Pavements" (GBJ92).
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Engineering Construction Standard Full Text Information System
Chapter 2
Requirements for Base Layer
Article 2.0.1 The quality requirements for the base layer of recycled asphalt mixture pavement should be the same as those of ordinary asphalt mixture pavement.
Article 2.0.2 The base layer must meet the following requirements: 1. It has the strength and rigidity that meet the design requirements; 2. It has good stability,
3. It is flat and dense, and the camber is consistent with the surface layer; 4. It has good bonding with the surface layer.
Article 2.0.3 The type of asphalt pavement base layer (see Table 2.0.3) can be determined by the design according to regional characteristics, traffic requirements and material supply. The requirements and construction processes of various base materials must comply with the provisions of relevant design and construction specifications. Old asphalt pavement can also be used as a base layer.
Types of asphalt pavement base
Integral type
Lime stabilized soil (gravel)
Cement stabilized soil (gravel)
Lime stabilized industrial waste residue
Crushed (gravel) lime soil
Mud-lime macadam
Asphalt penetration type
Graded macadam (mixed with lime)
Graded gravel (mixed with lime)
Asphalt macadam
Asphalt concrete
Article 2.0.4 Before the construction of the asphalt surface layer, the quality of the base layer must be checked according to the provisions of Table 2-0-4. If the base layer has defects such as unevenness, looseness, pits, local cracks and weakness, it should be repaired before paving the surface layer. The surface layer can be constructed only after it meets the requirements.
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Inspection Items
Compactness
Flatness
Center Line Elevation
Cross Slope
Bending Value
Layer Quality Standard
Allowable Deviation
±10% and less than| |tt||±20mm
—Within 5cm
According to design requirements
Downrightness meter:
3m Straightness:
(standard deviation)）
±20mm
According to design requirements
Inspection unit
1000m2
1000m2
1000m2
Inspection method and frequency requirements
Dig a pit or measure elevation, one spot in the middle of the road and one spot on both sides of the road
Measure with a ruler, three spots
Sand filling method or ring knife method, measure at two spots
Smoothness meter: measure one track when the road width is less than or equal to 9m,
measure two tracks when the road width is greater than 9m
3m ruler: measure randomly every 100m, 5 times
Level Five places measured by instrument
Five places measured by level instrument
Smooth, dense, without potholes, not loose, without significant ups and downs, and without the concentration of coarse and fine materials Engineering Construction Standard Full Text Information System
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Chapter 3 Raw Materials
Section 1 Asphalt Used Materials
Article 3.1.1 Asphalt used materials come from the excavation or planing of old asphalt pavement, which can be in block or granular form. The amount of coal tar used materials mixed in asphalt used materials shall not exceed 20%, the amount of sand and gravel without asphalt bonding shall not exceed 10%, and other impurities shall not exceed 1%. Article 3.1.2 Asphalt used materials should be crushed before mixing with regeneration agent. When the blocks of asphalt used materials are large, they should be crushed in two stages. The first stage uses a crusher to crush the blocks to less than 200mm, and the second stage uses a hammer crusher. When only a jaw crusher is used for crushing, a steel plate can be placed under the tooth plate to increase the fineness of the crushed particles. Crushing can also be done manually. The maximum particle size of the crushed asphalt waste material shall comply with the requirements of Table 3.1.2. The crushing process can be omitted for planed asphalt waste material.
Requirements for particle size of crushed asphalt waste material
Best dream diameter
Scope of application
20(25)
Medium-grained recycled asphalt mixture,
Coarse-grained recycled asphalt mixture
30(35)
Coarse-grained recycled asphalt mixture
Article 3.1.3 The site for the storage of asphalt waste material should be flat, solid and well-drained to ensure that the shovel and transport tools will not be mixed with impurities during operation. Rainy areas should have rain protection facilities. The stacking height should be based on no caking, generally less than 1.5m. Section 2 Regeneration Agents
Article 3.2.1 In order to ensure the quality of recycled asphalt mixture, regeneration agents should be mixed into the old asphalt. The type and amount of regeneration agents should be determined by experiments.Article 2.2 The performance of the regeneration agent shall meet the following requirements: 1. Strong penetration and softening ability;
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2. Miscible with old asphalt materials,
3. Improve the road properties of old asphalt;
4. Contain no paraffin and ceresin;
5. Appropriate viscosity, slow aging;
6. Good adhesion. The regeneration agent must meet the requirements of the physical properties listed in Table 3.2.2.
Physical properties of regeneration agentbzxZ.net
Mass density
Saybolt viscosity, 25℃, 8
Pollution point, <
Flash point, ℃>
Adhesion to alkaline stone after mixing with asphalt
Adhesion to acidic and neutral stone after mixing with asphaltA
Regeneration agent model
More than 3 levels
More than 3 levels
More than 3 levels
Note: ①Aw type regeneration agent is used for the aggregate in the asphalt waste material with poor adhesion to asphalt. ②Adhesion refers to the result of the peeling test after the regeneration agent is mixed with the old asphalt. The regeneration agent should be stored in a covered container to prevent water and dust from mixing in. The safety and fire protection requirements for its transportation, storage and use are the same as those for heavy oils.
Section 3 Asphalt
Article 3.3.1 The new asphalt used to prepare recycled asphalt mixture shall meet the technical requirements of ordinary hot mix asphalt mixture. Article 3.3.2 When recycled asphalt mixture is used in road projects with medium and light traffic volume, the quality of the new asphalt used shall meet the requirements of Table 3.3.2. Article 3.3.3 When recycled asphalt mixture is used in road projects with heavy traffic volume, the quality of the new asphalt used shall meet the requirements of Table 3.3.3. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Technical Requirements for Petroleum Asphalt on Roads
(Traffic volume less than 500 vehicles/day and night, rear axle, 10t) Quality
Needle penetration, (25℃, 5s, 100g), 1/10mm
Elongation,.
(15℃),cm,>
(25℃),cm,>
Softening point, (Ring and Ball method),℃
Solubility,%,>
Needle penetration ratio after evaporation,%,>
Flash point, (open),℃,>
Evaporation loss, (160℃, 5h),%,<Water content,%,>
No. 140
No. 100
121~16091~120
No. 100
Note: If used for traffic volume greater than 500 vehicles/day and night (rear axle 10t), it must be approved by the competent authorities of provinces, cities or autonomous regions before it can be used.
Technical requirements for heavy traffic road petroleum asphalt
Needle penetration (25°C, 100g5s), 1/10mm elongation, cm,>
25℃)
(15℃)
Softening point (ring and ball method), ℃
Solubility, %
Heat loss (163℃, 5H), %,<
Needle penetration ratio after heating, %,>
), cm,>
Elongation after heating ((25℃)
Flash point (open), ℃,>
Wax content (distillation method).%,
Mass density (25℃/25℃),>
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A H-120
101~140
380568
81~100
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Section 4 Mineral Materials
Article 3.4.1 The mineral materials used to prepare recycled asphalt mixtures shall meet the requirements of various mineral materials used in ordinary hot mix asphalt mixtures. Article 3.4.2 The coarse mineral material should be crushed stone. In areas where crushed stone supply is difficult, crushed gravel can be used. Crushed stone should be rolled from blocks with a technical grade of not less than grade three. The strength grade standard shall comply with the provisions of Table 3.4.2. Technical Standards for Strength Grades of Stone Materials for Road Construction Main Rocks
Rock Categories
Granite
Basalt
Igneous rocks
Limestone
Sandstone and schist
Gneiss
Andesite
Diabase
Limestone
Dolomite
Quartzite
Gneiss
Quartz gneiss
Technical grade standard
Saturated ultimate compressive strength
100~120
80~100
80~100
80~100
Crushed stone wear rate
「Single tube, Luo structure】
（Ji,
Block stone wear rate
【Double Jian, Huofei
Article 3.4.3 The adhesion between crushed stone and asphalt shall not be less than Grade 3 when measured by the boiling method, otherwise an activator must be added to improve the adhesion. The shape of crushed stone particles should be similar to a cube. The content of flat and slender particles (the ratio of the long side to the short side is greater than 3) should be less than 15%; the content of weak particles should be less than 4%; the mud content should be less than or equal to 1%. The crushed stone must be dry and the moisture content should be less than 3%. The content of particles exceeding the maximum nominal size should not be greater than 5%, and the content of particles less than the minimum nominal size should not be greater than 15%.
Stone chips are fine chips obtained by rolling crushed stone, and the maximum particle size is less than 5mm.
Sand can be mountain sand, river sand, and sea sand. Its quality should be hard, well graded, with a multi-angular surface, clean and free of impurities, and the mud content should not be greater than 5%. Article 3.4.5 Mineral powder shall be finely ground limestone powder, which must be dry and free of impurities, and the water content shall not be greater than 1%. The content of particles smaller than 0.074 mm in the mineral powder should be greater than 80%, and the hydrophilic coefficient should be less than 1.0. Engineering Construction Standard Full Text Information System
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Evaporation loss, (160℃, 5h), %,<Water content, %,>
No.140
No.100
121~16091~120
No.100
Note: If used in a traffic volume greater than 500 vehicles/day and night (rear axle 10t), it must be approved by the competent authorities of provinces, cities, and autonomous regions before it can be used.
Technical requirements for heavy traffic road petroleum asphalt
Needle penetration (25°C, 100g5s), 1/10mm elongation, cm,>
25℃)
(15℃)
Softening point (ring and ball method), ℃
Solubility, %
Heat loss (163℃, 5H), %,<
Needle penetration ratio after heating, %,>
), cm,>
Elongation after heating ((25℃)
Flash point (open), ℃,>
Wax content (distillation method).%,
Mass density (25℃/25℃),>
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A H-120
101~140
380568
81~100
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Engineering Construction Standard Full Text Information System
Section 4 Mineral Materials
Article 3.4.1 The mineral materials used to prepare recycled asphalt mixtures shall meet the requirements of various mineral materials used in ordinary hot mix asphalt mixtures. Article 3.4.2 The coarse mineral material should be crushed stone. In areas where crushed stone supply is difficult, crushed gravel can be used. Crushed stone should be rolled from blocks with a technical grade of not less than grade three. The strength grade standard shall comply with the provisions of Table 3.4.2. Technical Standards for Strength Grades of Stone Materials for Road Construction Main Rocks
Rock Categories
Granite
Basalt
Igneous rocks
Limestone
Sandstone and schist
Gneiss
Andesite
Diabase
Limestone
Dolomite
Quartzite
Gneiss
Quartz gneiss
Technical grade standard
Saturated ultimate compressive strength
100~120
80~100
80~100
80~100
Crushed stone wear rate
「Single tube, Luo structure】
（Ji,
Block stone wear rate
【Double Jian, Huofei
Article 3.4.3 The adhesion between crushed stone and asphalt shall not be less than Grade 3 when measured by the boiling method, otherwise an activator must be added to improve the adhesion. The shape of crushed stone particles should be similar to a cube. The content of flat and slender particles (the ratio of the long side to the short side is greater than 3) should be less than 15%; the content of weak particles should be less than 4%; the mud content should be less than or equal to 1%. The crushed stone must be dry and the moisture content should be less than 3%. The content of particles exceeding the maximum nominal size should not be greater than 5%, and the content of particles less than the minimum nominal size should not be greater than 15%.
Stone chips are fine chips obtained by rolling crushed stone, and the maximum particle size is less than 5mm.
Sand can be mountain sand, river sand, and sea sand. Its quality should be hard, well graded, with a multi-angular surface, clean and free of impurities, and the mud content should not be greater than 5%. Article 3.4.5 Mineral powder shall be finely ground limestone powder, which must be dry and free of impurities, and the water content shall not be greater than 1%. The content of particles smaller than 0.074 mm in the mineral powder should be greater than 80%, and the hydrophilic coefficient should be less than 1.0. Engineering Construction Standard Full Text Information System
kANiKAca℃,>
Evaporation loss, (160℃, 5h), %,<Water content, %,>
No.140
No.100
121~16091~120
No.100
Note: If used in a traffic volume greater than 500 vehicles/day and night (rear axle 10t), it must be approved by the competent authorities of provinces, cities, and autonomous regions before it can be used.
Technical requirements for heavy traffic road petroleum asphalt
Needle penetration (25°C, 100g5s), 1/10mm elongation, cm,>
25℃)
(15℃)
Softening point (ring and ball method), ℃
Solubility, %
Heat loss (163℃, 5H), %,<
Needle penetration ratio after heating, %,>
), cm,>
Elongation after heating ((25℃)
Flash point (open), ℃,>
Wax content (distillation method).%,
Mass density (25℃/25℃),>
Engineering Construction Standard Full-text Information System
A H-120
101~140
380568
81~100
KAONTKACa-
Engineering Construction Standard Full Text Information System
Section 4 Mineral Materials
Article 3.4.1 The mineral materials used to prepare recycled asphalt mixtures shall meet the requirements of various mineral materials used in ordinary hot mix asphalt mixtures. Article 3.4.2 The coarse mineral material should be crushed stone. In areas where crushed stone supply is difficult, crushed gravel can be used. Crushed stone should be rolled from blocks with a technical grade of not less than grade three. The strength grade standard shall comply with the provisions of Table 3.4.2. Technical Standards for Strength Grades of Stone Materials for Road Construction Main Rocks
Rock Categories
Granite
Basalt
Igneous rocks
Limestone
Sandstone and schist
Gneiss
Andesite
Diabase
Limestone
Dolomite
Quartzite
Gneiss
Quartz gneiss
Technical grade standard
Saturated ultimate compressive strength
100~120
80~100
80~100
80~100
Crushed stone wear rate
「Single tube, Luo structure】
（Ji,
Block stone wear rate
【Double Jian, Huofei
Article 3.4.3 The adhesion between crushed stone and asphalt shall not be less than Grade 3 when measured by the boiling method, otherwise an activator must be added to improve the adhesion. The shape of crushed stone particles should be similar to a cube. The content of flat and slender particles (the ratio of the long side to the short side is greater than 3) should be less than 15%; the content of weak particles should be less than 4%; the mud content should be less than or equal to 1%. The crushed stone must be dry and the moisture content should be less than 3%. The content of particles exceeding the maximum nominal size should not be greater than 5%, and the content of particles less than the minimum nominal size should not be greater than 15%.
Stone chips are fine chips obtained by rolling crushed stone, and the maximum particle size is less than 5mm.
Sand can be mountain sand, river sand, and sea sand. Its quality should be hard, well graded, with a multi-angular surface, clean and free of impurities, and the mud content should not be greater than 5%. Article 3.4.5 Mineral powder shall be finely ground limestone powder, which must be dry and free of impurities, and the water content shall not be greater than 1%. The content of particles smaller than 0.074 mm in the mineral powder should be greater than 80%, and the hydrophilic coefficient should be less than 1.0. Engineering Construction Standard Full Text Information System
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