Some standard content:
CJ66-1995 "Construction Specifications for Pavement Slurry Sealing" Engineering Construction Standard Full Text Information System
Industry Standard of the People's Republic of China
Construction Specifications for Pavement Slurry Sealing
Slurry Sealing SpecificationCJJ
1996Beijing
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Notice on the Release of the Industry Standard "Construction Specification for Pavement Slurry Seal"
Construction Standard [1995] No. 596
Construction Committees (Construction Departments) of all provinces, autonomous regions, and municipalities directly under the Central Government, Construction Committees of independently planned cities, and relevant departments of the State Council:
According to the requirements of the Ministry of Construction's Construction Standard [1993] No. 699, the "Construction Specification for Pavement Slurry Seal" edited by the China Academy of Building Technology has been reviewed and approved as an industry standard, numbered CJJ66-95, and will be implemented from May 1, 1996. This standard is under the unified management of the Beijing Municipal Design and Research Institute, the Ministry of Construction's urban road and bridge standard technology centralized unit, and the specific interpretation and other work are the responsibility of the editing unit. The Ministry of Construction's Standard and Quota Research Institute organized the publication of this standard. Ministry of Construction of the People's Republic of China
October 16, 1995
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Material Selection and Technical Requirements
Emulsified Asphalt
Additives
Mix Design of Slurry Mixtures
General Provisions
Mix Design Procedures and Requirements
Construction and Technical Requirements·
General Provisions
Technical Requirements for Original Pavement
Construction Preparation:
Construction Quality Control
Appendix A
Appendix Record B
Test methods for slurry mixture
Consistency test
Demulsification time test
Adhesion test
Wet wheel abrasion test·
Load wheel test
Terms used in this specification
Additional explanation
Engineering construction standard full text information system
............
.......
Engineering construction standard full text information system
1 General
1.0.1 This specification is formulated to unify the construction method of pavement slurry seal and ensure the construction quality of slurry seal.
1.0.2 This specification is applicable to the slurry seal engineering of asphalt, cement and gravel surface layers of newly built, rebuilt and maintained urban roads and squares, airports, bridge decks, tunnel pavements, etc. 1.0.3 The binder of the slurry seal referred to in this specification is emulsified asphalt, which is constructed at room temperature. The correct proportion of various materials should be ensured during construction, and initial maintenance should be strengthened during the molding period.
In addition to complying with this specification, the construction of slurry seal should also comply with the provisions of relevant national standards and specifications.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2.0.1 Slurry Seal
slurryseal
Under normal temperature conditions, emulsified asphalt, well-graded mineral materials, fillers, water and additives are mixed into a slurry mixture according to a certain proportion, and spread on the road surface in a timely and even manner, and a thin layer is formed after maintenance.
2.0.2 Original Road Surface The general term for the original road surface under the slurry seal, including the surface layer and base layer of the old road surface and the newly built road surface.
2.0.3 Mineral aggregate
+aggregate
General term for crushed stone, rolled gravel, stone chips, sand, etc. 2.0.4 Filler
General term for cement, slaked lime, fly ash and mineral powder, etc. 2.0.5 Sand equivalent
The ratio of the volume of flocculated soil in fine mineral aggregate to the volume of mineral aggregate. 2.0.6 Slurry mixture A mixture of emulsified asphalt, mineral aggregate, filler, water and additives in a certain proportion.
2.0.7 Fine seal (Type I) typeIslurry seal is a slurry seal with a maximum nominal particle size of 2.36mm for graded mineral aggregate, a maximum thickness of 3.2mm after curing and forming, and a dry mineral aggregate spreading amount of 3.2~5.4kg/m2. 2.0.8 Medium seal (Type I) TypeⅡ slurry seal The maximum nominal particle size of graded mineral material is 4.75mm, the maximum thickness after curing and forming is 6.4~8.0mm, and the dry mineral material paving amount is 5.4~8.1kg/m2 of slurry seal. 2.0.9 Coarse seal (Type III) TypeⅢ slurry seal The maximum nominal particle size of graded mineral material is 9.5mm, the maximum thickness after curing and forming is 9.5~11.0mm, and the dry mineral material paving amount is 8.1~13.6kg/m2 of slurry seal. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Slow-setting and slow-opening traffic type slurry seal (SS/ST type) 2.0.10
slowser-
slowtrafficslurryseal
The slurry mixture has a bonding force of less than 120N·cm at 30min, a bonding force of less than 200N·cm at 60min, and a slurry seal open for traffic for more than 4h. 2.0.11 Quick-setting and slow-opening traffic type slurry seal (QS/ST type) quickset
slowtrafficslurryseal
The slurry mixture has a bonding force of more than 120N·cm at 30min, a bonding force of less than 200N·cm at 60min, and a slurry seal open for traffic for 1 to 4h. 2.0.12 Quick-setting and quick-opening traffic slurry seal (QS/QT type) quickset-
quick traffic slurry seal
Slurry mixture with a bonding force greater than 120N·cm at 30min, a bonding force greater than 200N·cm at 60min, and a slurry seal with a traffic opening time of less than 60min. 2.0.13 Mixable time (Tm) mixingtime Indoor mixing test according to a certain mix ratio, the time from the mixing of emulsified asphalt to the time when the hand feels strong and the mixing is obviously difficult. 2.0.14 Initial setting time (Ts) settime
Slurry mixture with a bonding force of 120N·cm is measured by a bonding force test. 2.0.15 Traffic time (T,) traffic time The time from the time when the emulsified asphalt is added to the slurry mixture to the time when the adhesion of the mixture reaches 200N·cm, measured by the adhesion test. 2.0.16 Consistency value (CV) consistency value represents the index of the workability and water content of the slurry mixture, measured by the consistency test. 2.0.17 Abrasion loss (WTAT) abrasion loss A wet wheel abrasion tester is used to simulate the wheels running on the slurry seal layer. The mass difference per unit wear area of the standard specimen before and after a certain force and a certain number of actions is measured to determine the minimum asphalt dosage of the slurry mixture. 2.0.18 Sand adhesion (LWT) Sand adhesion is simulated by a load wheel instrument, which simulates the wheel driving on the slurry seal. After a certain force and a certain number of actions, the mass difference of the standard test piece before and after sanding per unit load area is measured, and the maximum asphalt dosage of the slurry mixture is determined by the Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
. Cohesion (CT) Cohesion torque
Cohesion force instrument is used to simulate the influence of the horizontal force generated by the vehicle driving on the slurry seal. The value indicated by the torque meter on the force application handle after the test is used to determine the initial setting of the slurry seal and the time to open to traffic.
2.0.20 Solidification
After the slurry mixture is spread, the cohesion gradually increases with time. When the cohesion reaches a load sufficient to bear the vehicle driving, the slurry mixture is said to be solidified. 2.0.21 Cure
The process of the bonding force developing from 0 to 200 N·cm after the slurry mixture is spread. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Material selection and technical requirements
3.1 Emulsified asphalt
3.1.1 Emulsified asphalt shall comply with the relevant provisions of the current national standard "Emulsified Asphalt Pavement Construction and Acceptance Regulations".
2 Cationic slow-cracking emulsified asphalt is preferred. 3.1.2
3~15.
The standard viscosity C of emulsified asphalt should be 12~40s, and the Engler viscosity E25 should be the asphalt content in emulsified asphalt should not be less than 55%. 3.2 Mineral
Mineral materials should be crushed stone, rolled gravel, stone chips, sand, etc. The quality of mineral materials should comply with the relevant provisions of the current national standard "Asphalt Pavement Construction and Acceptance Specifications". 3.2.2
Before adding fillers, the sand equivalent of mineral material mixture shall not be less than 45. The gradation of mineral materials shall comply with the provisions of Table 3.2.3. Grading of mineral materials
Sieve hole (mm)
Square hole sieve
Round hole sieve
Engineering construction standard full text information system
Fine seal layer
90~100Www.bzxZ.net
25～~42
Quality pass percentage (%)
Medium seal layer
90~100
Coarse seal layer
Engineering construction standard full text information system
3.3 Filler
3.3.1 Cement, slaked lime, ammonium sulfate and fly ash shall not contain soil impurities, and shall be dry, loose, without agglomeration and lumps, and the content of particles less than 0.075mm shall not be less than 80%. The quality of mineral powder shall comply with the relevant provisions of the current national standard "Asphalt Pavement Construction and Acceptance Specifications".
3.3.2 When selecting chemically active fillers such as cement, slaked lime and ammonium sulfate, it should be easy to mix, spread and shape the slurry mixture to ensure the overall strength of the seal. 3.4 Water
3.4.1 Drinking water can be used for slurry seal. 3.5 Additives
Additives can be liquid or solid materials and should be mixed evenly with mineral materials.
The use of additives shall not lose the overall strength of asphalt and mixture. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Mix Ratio Design of Slurry Mixture
4.1 General Provisions
4.1.1 Types of slurry seals can be divided into fine seals (Type I), medium seals (Type II) and coarse seals (Type III) according to the maximum nominal particle size of mineral materials. According to the different initial setting and traffic opening time, the slurry seal can also be divided into: slow setting and slow traffic opening type (SS/ST type), fast setting and slow traffic opening type (QS/ST type) and fast setting and fast traffic opening type (QS/QT type).
4.1.2 Fine seal is suitable for filling cracks, filling gaps and surface seal of roads with light traffic volume;
Medium seal is suitable for preventive maintenance to repair the looseness, cracking and aging of asphalt surface layer, improve the anti-skid ability of medium traffic volume roads and heavy traffic volume roads, and can be used for the wear layer of asphalt pavement or cement concrete pavement or the seal of stable base layer;
Coarse seal is suitable for the bottom layer of multi-layer seal, and can be used for the surface layer to improve the anti-skid ability of heavy traffic volume roads.
4.1.3 Fine seal, medium seal and coarse seal can be paved in single layer or combined multi-layer.
Select.
The maximum thickness and material consumption of different sealing layers after curing can be calculated according to Table 4.1.4 Maximum thickness and material consumption
Maximum thickness of sealing layer after curing (mm)
Dry aggregate consumption (kg/m2)
Asphalt consumption (mass percentage of dry aggregate) (%) Engineering Construction Standard Full-text Information System
Fine sealing layer
Medium sealing layer
Coarse sealing layer
Engineering Construction Standard Full-text Information System
Filling consumption (mass percentage of dry aggregate) (%)Total moisture content (mass percentage of dry aggregate) (%)Amount of water added (mass percentage of dry aggregate) (%)4.1.5
The technical indicators of indoor test of slurry mixture shall comply with the provisions of Table 4.1.5. Technical indicators of slurry mixture
Mixing time Tm
Consistency value cV
Abrasion value WTAT
Adhesion sand amount LWT
Adhesion strength CT
High-performance slurry seal paver
Manual mixing or ordinary slurry seal paver mechanical mixing and paving
Manual mixing and paving
Open traffic
Note: High-performance slurry seal paver refers to a slurry seal paver with automatic metering, dual-shaft agitator and bidirectional distributor.
Mix design procedure and requirements
Mix design of mineral materials shall be carried out according to the following steps and requirements: 4.2.1
(1) Determine the grading curve of mineral materials according to the selected seal type; (2) Select various mineral materials that meet the specified quality requirements; (3) Conduct screening tests on various mineral materials respectively; (4) Determine the relative density of various mineral materials;
(5) Determine the mix proportion of various mineral materials that meet the requirements of the grading curve according to the particle composition of various mineral materials.
4.2.2 The consistency of the mixture and the amount of water added shall be determined according to the following steps and requirements: (1) Select mineral materials with graded specifications and determine their water content; Engineering Construction Standard Full Text Information System5. Technical indicators of slurry mixture
Mixing time Tm
Consistency value cV
Abrasion loss WTAT
Adhesion sand amount LWT
Cohesion force CT
High-performance slurry seal paver
Manual mixing or ordinary slurry seal paver mechanical mixing and paving
Manual mixing and paving
Open traffic
Note: High-performance slurry seal paver refers to a slurry seal paver with automatic metering, dual-shaft agitator and bidirectional distributor.
Mix design procedure and requirements
Mix design of mineral materials shall be carried out according to the following steps and requirements: 4.2.1
(1) Determine the grading curve of mineral materials according to the selected seal type; (2) Select various mineral materials that meet the specified quality requirements; (3) Conduct screening tests on various mineral materials respectively; (4) Determine the relative density of various mineral materials;
(5) Determine the mix proportion of various mineral materials that meet the requirements of the grading curve according to the particle composition of various mineral materials.
4.2.2 The consistency of the mixture and the amount of water added shall be determined according to the following steps and requirements: (1) Select mineral materials with graded specifications and determine their water content; Engineering Construction Standard Full Text Information System5. Technical indicators of slurry mixture
Mixing time Tm
Consistency value cV
Abrasion loss WTAT
Adhesion sand amount LWT
Cohesion force CT
High-performance slurry seal paver
Manual mixing or ordinary slurry seal paver mechanical mixing and paving
Manual mixing and paving
Open traffic
Note: High-performance slurry seal paver refers to a slurry seal paver with automatic metering, dual-shaft agitator and bidirectional distributor.
Mix design procedure and requirements
Mix design of mineral materials shall be carried out according to the following steps and requirements: 4.2.1
(1) Determine the grading curve of mineral materials according to the selected seal type; (2) Select various mineral materials that meet the specified quality requirements; (3) Conduct screening tests on various mineral materials respectively; (4) Determine the relative density of various mineral materials;
(5) Determine the mix proportion of various mineral materials that meet the requirements of the grading curve according to the particle composition of various mineral materials.
4.2.2 The consistency of the mixture and the amount of water added shall be determined according to the following steps and requirements: (1) Select mineral materials with graded specifications and determine their water content; Engineering Construction Standard Full Text Information System
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.