1 General Provisions
1.0.1 This Code is formulated with a view to implementing the national technical and economic policies, ensuring the engineering quality, and realizing advanced technology, reasonable process, resources conservation and environmental protection during the construction of concrete structures.
1.0.2 This Code is applicable to the construction of concrete structures in building engineering, not to the construction of lightweight aggregate concrete and special concrete.
1.0.3 This Code contains the basic requirements for the construction of concrete structures. When there are special requirements for the construction stated in the design documents, the construction shall also be implemented in accordance with the design documents.
1.0.4 Construction of concrete structures shall not only meet the requirements of this Code but also comply with those in the current relevant standards of the nation.
2 Terms
2.0.1 Concrete structure
The structure mainly made of concrete, including plain concrete structure, reinforced concrete structure and prestressed concrete structure, which may be classified into cast-in-situ concrete structure and precast concrete structure according to the construction method.
2.0.2 Cast-in-situ concrete structure
The concrete structure that is made by erecting formwork in situ and integral casting, hereinafter referred to as cast-in-situ structure.
2.0.3 Precast concrete structure
The concrete structure that is made by assembling and connecting the precast concrete members or parts, hereinafter referred to as precast structure.
2.0.4 Workability of concrete
The features that shall be possessed of by the concrete mixture in order to meet the construction operation requirements and ensure the concrete uniformity and compactness, mainly including flowability, cohesiveness and water-retaining property. It is hereinafter referred to as workability of concrete.
2.0.5 Self-compacting concrete
The concrete that can flow and be compacted under the action of deadweight, dispensing with the vibration by external force.
2.0.6 Pre-tensioning
It is a kind of construction method that establishes prestress by firstly post-tensioning the prestressed tendon on a pedestal or formwork and temporarily anchoring it with grip, concreting and then pre-tensioning the prestressed tendon after the concrete reaching a certain specified strength.
2.0.7 Post-tensioning
It is a kind of construction method that establishes prestress by post-tensioning the prestressed tendon after the concrete of a structural member reaching a certain specified strength and permanently anchoring it with anchorage device.
2.0.8 Fabricated steel bar
It refers to the ordinary reinforcement pre-processed and formed with special equipment as the required dimension and shape.
2.0.9 Construction joint
It refers to the joint formed by segmented placing according to the design requirements or the construction demands. The joints will be formed when concrete continues to be placed after the previously-placed concrete reaches a certain strength.
2.0.10 Post-cast strip
The concrete strip in certain width, placed after a certain time, which is reserved in such structures as beam, slab (including foundation slab) and wall, in order to adapt to the influence of such factors as the ambient temperature changes, concrete shrinkage and structural differential settlement.
3 Basic Requirements
3.1 Construction Management
3.1.1 The construction organizations for the concrete structures shall have corresponding qualification and establish corresponding quality management system as well as construction quality control and inspection system.
3.1.2 Organization structuring and manning of construction project department shall meet the construction management requirements of concrete structures. Construction operation personnel shall receive training to acquire the basic knowledge and skills required for their respective posts.
3.1.3 Before construction, the development organization shall organize the design, construction and supervision organizations to carry out the technical disclosure and joint trial for the design documents. The in-depth design documents completed by the construction organization shall be confirmed by the original design organization.
3.1.4 The construction organization shall ensure the authenticity, effectiveness, integrity and completeness of the construction documents. Construction project technical leader shall organize the data preparation, collection, arrangement, examination and verification, and timely archiving and filing during the whole construction process.
3.1.5 The construction organization shall establish specific construction schemes according to the requirements of the design documents and construction organization design, which shall be implemented after examined and approved by the supervision organization.
3.1.6 Before construction of concrete structures, the construction organization shall establish emergency plan upon the contingent hazards, disasters and emergencies at the construction site. Technical disclosure and training shall be carried out for the emergency plan, and drilling shall be carried out if necessary.
3.2 Construction Technology
3.2.1 Before construction of concrete structures, the construction process shall be determined according to the structure types, characteristics and construction conditions, and each preparation work shall be completed.
3.2.2 Construction process monitoring should be carried out and construction control measures shall be timely adjusted for the concrete structures that have complex shape, relatively large height or span, complex subgrade conditions and particular construction environment conditions.
3.2.3 The new technologies, new processes, new materials and new equipment adopted during the construction of concrete structures shall be evaluated and filed according to the relevant requirements. The new construction processes or those adopted for the first time shall be evaluated before construction, and special construction schemes shall be established and verified by the supervision organization.
1 General Provisions
2 Terms
3 Basic Requirements
3.1 Construction Management
3.2 Construction Technology
3.3 Construction Quality and Safety
4 Formwork
4.1 General Requirements
4.2 Materials
4.3 Design
4.4 Fabrication and Installation
4.5 Removal and Maintenance
4.6 Quality Control
5 Reinforcement
5.1 General Requirements
5.2 Materials
5.3 Reinforcement Fabrication
5.4 Reinforcement Connection and Fixing
5.5 Quality Control
6 Prestressed Concrete
6.1 General Requirements
6.2 Materials
6.3 Fabrication and Installation
6.4 Post-tensioning and Pre-tensioning
6.5 Grouting and Anchorage Protection
6.6 Quality Control
7 Concrete Production and Transportation
7.1 General Requirements
7.2 Materials
7.3 Mix Proportioning
7.4 Mixing
7.5 Transportation
7.6 Quality Control
8 Cast-in-situ Concrete
8.1 General Requirements
8.2 Conveying
8.3 Placing
8.4 Compacting
8.5 Curing
8.6 Construction Joint and Post-cast Strip
8.7 Crack Control of Mass Concrete
8.8 Quality Control
8.9 Repair of Concrete Defects
9 Precast Concrete
9.1 General Requirements
9.2 Checking
9.3 Production
9.4 Storage and Transportation
9.5 Erection
9.6 Quality control
10 Construction in Cold, Hot and Rainy Weather
10.1 General Requirements
10.2 Cold Weather Requirements
10.3 Hot Weather Requirements
10.4 Rainy Weather Requirements
11 Environmental Protection
11.1 General Requirements
11.2 Environmental Considerations
Appendix A Characteristic Value of Loads Acting on Formwork
Appendix B Nominal Diameter, Nominal Sectional Area, Calculation Sectional Area and Theoretical Weight of Common Reinforcement
Appendix C Minimum Splicing Length of Longitudinal Reinforcement
Appendix D Calculation and Measurement Method for Elongation of Prestressed Tendon
Appendix E Testing Method for Prestressing Loss Due to Friction
Appendix F Specification of Concrete Materials
Explanation of Wording in This Code
List of Quoted Standards
1 General Provisions
1.0.1 This Code is formulated with a view to implementing the national technical and economic policies, ensuring the engineering quality, and realizing advanced technology, reasonable process, resources conservation and environmental protection during the construction of concrete structures.
1.0.2 This Code is applicable to the construction of concrete structures in building engineering, not to the construction of lightweight aggregate concrete and special concrete.
1.0.3 This Code contains the basic requirements for the construction of concrete structures. When there are special requirements for the construction stated in the design documents, the construction shall also be implemented in accordance with the design documents.
1.0.4 Construction of concrete structures shall not only meet the requirements of this Code but also comply with those in the current relevant standards of the nation.
2 Terms
2.0.1 Concrete structure
The structure mainly made of concrete, including plain concrete structure, reinforced concrete structure and prestressed concrete structure, which may be classified into cast-in-situ concrete structure and precast concrete structure according to the construction method.
2.0.2 Cast-in-situ concrete structure
The concrete structure that is made by erecting formwork in situ and integral casting, hereinafter referred to as cast-in-situ structure.
2.0.3 Precast concrete structure
The concrete structure that is made by assembling and connecting the precast concrete members or parts, hereinafter referred to as precast structure.
2.0.4 Workability of concrete
The features that shall be possessed of by the concrete mixture in order to meet the construction operation requirements and ensure the concrete uniformity and compactness, mainly including flowability, cohesiveness and water-retaining property. It is hereinafter referred to as workability of concrete.
2.0.5 Self-compacting concrete
The concrete that can flow and be compacted under the action of deadweight, dispensing with the vibration by external force.
2.0.6 Pre-tensioning
It is a kind of construction method that establishes prestress by firstly post-tensioning the prestressed tendon on a pedestal or formwork and temporarily anchoring it with grip, concreting and then pre-tensioning the prestressed tendon after the concrete reaching a certain specified strength.
2.0.7 Post-tensioning
It is a kind of construction method that establishes prestress by post-tensioning the prestressed tendon after the concrete of a structural member reaching a certain specified strength and permanently anchoring it with anchorage device.
2.0.8 Fabricated steel bar
It refers to the ordinary reinforcement pre-processed and formed with special equipment as the required dimension and shape.
2.0.9 Construction joint
It refers to the joint formed by segmented placing according to the design requirements or the construction demands. The joints will be formed when concrete continues to be placed after the previously-placed concrete reaches a certain strength.
2.0.10 Post-cast strip
The concrete strip in certain width, placed after a certain time, which is reserved in such structures as beam, slab (including foundation slab) and wall, in order to adapt to the influence of such factors as the ambient temperature changes, concrete shrinkage and structural differential settlement.
3 Basic Requirements
3.1 Construction Management
3.1.1 The construction organizations for the concrete structures shall have corresponding qualification and establish corresponding quality management system as well as construction quality control and inspection system.
3.1.2 Organization structuring and manning of construction project department shall meet the construction management requirements of concrete structures. Construction operation personnel shall receive training to acquire the basic knowledge and skills required for their respective posts.
3.1.3 Before construction, the development organization shall organize the design, construction and supervision organizations to carry out the technical disclosure and joint trial for the design documents. The in-depth design documents completed by the construction organization shall be confirmed by the original design organization.
3.1.4 The construction organization shall ensure the authenticity, effectiveness, integrity and completeness of the construction documents. Construction project technical leader shall organize the data preparation, collection, arrangement, examination and verification, and timely archiving and filing during the whole construction process.
3.1.5 The construction organization shall establish specific construction schemes according to the requirements of the design documents and construction organization design, which shall be implemented after examined and approved by the supervision organization.
3.1.6 Before construction of concrete structures, the construction organization shall establish emergency plan upon the contingent hazards, disasters and emergencies at the construction site. Technical disclosure and training shall be carried out for the emergency plan, and drilling shall be carried out if necessary.
3.2 Construction Technology
3.2.1 Before construction of concrete structures, the construction process shall be determined according to the structure types, characteristics and construction conditions, and each preparation work shall be completed.
3.2.2 Construction process monitoring should be carried out and construction control measures shall be timely adjusted for the concrete structures that have complex shape, relatively large height or span, complex subgrade conditions and particular construction environment conditions.
3.2.3 The new technologies, new processes, new materials and new equipment adopted during the construction of concrete structures shall be evaluated and filed according to the relevant requirements. The new construction processes or those adopted for the first time shall be evaluated before construction, and special construction schemes shall be established and verified by the supervision organization.
Contents of GB 50666-2011
1 General Provisions
2 Terms
3 Basic Requirements
3.1 Construction Management
3.2 Construction Technology
3.3 Construction Quality and Safety
4 Formwork
4.1 General Requirements
4.2 Materials
4.3 Design
4.4 Fabrication and Installation
4.5 Removal and Maintenance
4.6 Quality Control
5 Reinforcement
5.1 General Requirements
5.2 Materials
5.3 Reinforcement Fabrication
5.4 Reinforcement Connection and Fixing
5.5 Quality Control
6 Prestressed Concrete
6.1 General Requirements
6.2 Materials
6.3 Fabrication and Installation
6.4 Post-tensioning and Pre-tensioning
6.5 Grouting and Anchorage Protection
6.6 Quality Control
7 Concrete Production and Transportation
7.1 General Requirements
7.2 Materials
7.3 Mix Proportioning
7.4 Mixing
7.5 Transportation
7.6 Quality Control
8 Cast-in-situ Concrete
8.1 General Requirements
8.2 Conveying
8.3 Placing
8.4 Compacting
8.5 Curing
8.6 Construction Joint and Post-cast Strip
8.7 Crack Control of Mass Concrete
8.8 Quality Control
8.9 Repair of Concrete Defects
9 Precast Concrete
9.1 General Requirements
9.2 Checking
9.3 Production
9.4 Storage and Transportation
9.5 Erection
9.6 Quality control
10 Construction in Cold, Hot and Rainy Weather
10.1 General Requirements
10.2 Cold Weather Requirements
10.3 Hot Weather Requirements
10.4 Rainy Weather Requirements
11 Environmental Protection
11.1 General Requirements
11.2 Environmental Considerations
Appendix A Characteristic Value of Loads Acting on Formwork
Appendix B Nominal Diameter, Nominal Sectional Area, Calculation Sectional Area and Theoretical Weight of Common Reinforcement
Appendix C Minimum Splicing Length of Longitudinal Reinforcement
Appendix D Calculation and Measurement Method for Elongation of Prestressed Tendon
Appendix E Testing Method for Prestressing Loss Due to Friction
Appendix F Specification of Concrete Materials
Explanation of Wording in This Code
List of Quoted Standards
