1 General Provisions
1.0.1 This code is formulated with view to strengthening the quality control and technical management of relevant materials and products applied in engineering structure strengthening and ensuring the quality and safety of engineering structural strengthening works.
1.0.2 This code is applicable to safety inspection and appraisal for the materials and products used in structural strengthening work.
1.0.3 The application safety appraisal conclusion of engineering structural strengthening materials and products shall be deemed as the basis for selecting engineering strengthening materials and shall not substitute the sample reinspection of strengthening materials and products carried out before entry into the construction site.
1.0.4 The application safety appraisal of engineering structural strengthening materials and products shall be undertaken by an inspection and appraisal agency of corresponding qualification approved by relevant national administration.
1.0.5 This code shall be used in combination with the current national standards "Design Code for Strengthening Concrete Structure" (GB 50367), "Design Code for Strengthening of Masonry Structure" (GB 50702), "Code for Acceptance of Construction Quality of Strengthening Building Structures" (GB 50550).
1.0.6 The inspection and appraisal on application safety for engineering structural strengthening materials and products shall comply with not only this code but also the current relevant national standards.
2 Terms
2.0.1 Appraisal
A series of activities carried out to verify the reliability (including safety, applicability and durability) of a strengthening material or product in the stressed process of the load bearing member in engineering structure.
2.0.2 Verification test
The test to verify if the property of a strengthening material or product complies with the specified requirements.
2.0.3 Sampling
Process of constituting a sample by randomly taking or under a certain rule.
2.0.4 Sample
The individual(s) taken by specified method from the population, to provide information about the population and severing as a potential basis for determining some characteristic of the population.
2.0.5 Characteristic value of a material property
The basic representative value of a material property. It shall be determined by a quantile, which normally is valued at 0.05, from the probability distribution of the conforming material property.
2.0.6 Substrate
Both the strengthening member and the original member in cementing work are adhered but they are different in property. For distinguishing, the original member or its adhered part is termed as "substrate".
2.0.7 Structural adhesive
The adhesive which is used for cementing load-bearing structure or member and can long term withstand design stress and environmental effect ("structural adhesive" for short)
2.0.8 Primer
The adhesive which is used for surface treatment of the strengthened structural member (substrate) to prevent surface contamination and improve the adhesive property of the surface.
2.0.9 Putty
The adhesive used for repairing and leveling the surface defect on strengthened structural member (substrate). To adapt to the operating conditions on the engineering structure site, putty generally is required to be capable of curing at room temperature and have no exaction to the adhesion surface.
2.0.10 Interfacial adhesive for structure
The adhesive used in engineering structural strengthening works to improve the bonding capacity between new and existing concrete or between existing concrete and new pavement, also known as concrete interface agent for structure.
2.0.11 Pressure injection adhesive for cracks
Foreword i
1 General Provisions
2 Terms
3 Basic Requirements
4 Structural Adhesive
4.1 General Requirements
4.2 Structural Adhesive for Concrete Substrate
4.3 Structural Adhesive for Masonry Substrates
4.4 Structural Adhesive for Steel Substrates
4.5 Structural Adhesive for Timber Substrates
4.6 Pressure Injection Adhesive for Cracks
4.7 Interfacial Adhesive, Primer and Putty for Structural Strengthening
4.8 Technical Performance Requirements of Structural Adhesive for Engineering Safety
5 Injection Grout for Cracks
5.1 General Requirements
5.2 Safety Appraisal of Injection Grout
6 Cement Based Injection Grout for Structural Strengthening
6.1 General Requirements
6.2 Safety Appraisal of Cement Based Injection Grout
7 Polymer Modified Cement Mortar for Structural Strengthening
7.1 General Requirements
7.2 Safety Appraisal of Polymer Modified Cement Mortar
8 Fiber Reinforced Polymer
8.1 General Requirements
8.2 Carbon Fiber Reinforced Polymer
8.3 Aramid Fiber Reinforced Polymer
8.4 Glass Fiber Reinforced Polymer
9 Steel Wire Rope for Structural Strengthening
9.1 General Requirements
9.2 Steel Wire for Rope Use
9.3 Safety Appraisal of Steel Wire Rope
10 Synthetics Modified Concrete and Mortar
10.1 General Requirements
10.2 Safety Appraisal of Synthetics Modified Concrete and Mortar
11 Steel Fiber Concrete
11.1 General Requirements
11.2 Safety Appraisal of Steel Fiber Concrete
12 Post-installed Connector
12.1 General Requirements
12.2 Material Appraisal of Substrate and Installed Connector
12.3 Safety Appraisal of Post-installed Connector
Appendix A The List of Suitable Testing Method Standards for Safety Appraisal
Appendix B Calculation Method of Characteristic Value of A Material Property
Appendix C Rapid Test Method for Adhesive Durable Wedge
Appendix D Determination Method of Interlaminar Shear Strength of Fiber Reinforced Polymer
Appendix E Determination Method of Splitting Tensile Strength for Filler-rich Adhesive Colloid and Polymer Modified Cement Mortar
Appendix F Determination Method and Assessment Criteria of T Impact Peeling Length for Structural Adhesive
Appendix G Laboratory Determination Method and Assessment Criteria of Tensile Bond Strength for Adhesive Material Agglutinate Reinforcement Material and Substrate
Appendix H Determination Method of Non-volatile Materials Content for Structural Adhesive
Appendix J Determination Method of Damp Heat Ageing Property for Structural Adhesives and Polymer Modified Cement Mortar
Appendix K Determination Method of Bond Strength for Adhesive Agglutinate Steel Bar and Substrate Concrete in Pull Out Constraint Condition
Appendix L Determination Method of Heat Ageing Resistance Ability for Structural Adhesive
Appendix M Determination Method of Fatigue Stress Resistance Ability for Test Piece Connected with Adhesive
Appendix N Determination Method and Evaluation Standard of Compression Shear Bond Strength for Concrete to Concrete
Appendix P Determination Method of Shrinkage for Adhesive Casting (Colloid)
Appendix Q Determination Method of Initial Viscosity for Structural Adhesive
Appendix R Determination Method of Thixotropic Index of Structural Adhesive
Appendix S Determination Method of Flexural Strength of Polymer Modified Cement Mortar and Grouting Material
Appendix T Determination Method of Flexural Toughness of Synthetics Modified Concrete
Appendix U Testing of Anchorage Capacity
Explanation of Wording in the Code
List of Quoted Standards
1 General Provisions
1.0.1 This code is formulated with view to strengthening the quality control and technical management of relevant materials and products applied in engineering structure strengthening and ensuring the quality and safety of engineering structural strengthening works.
1.0.2 This code is applicable to safety inspection and appraisal for the materials and products used in structural strengthening work.
1.0.3 The application safety appraisal conclusion of engineering structural strengthening materials and products shall be deemed as the basis for selecting engineering strengthening materials and shall not substitute the sample reinspection of strengthening materials and products carried out before entry into the construction site.
1.0.4 The application safety appraisal of engineering structural strengthening materials and products shall be undertaken by an inspection and appraisal agency of corresponding qualification approved by relevant national administration.
1.0.5 This code shall be used in combination with the current national standards "Design Code for Strengthening Concrete Structure" (GB 50367), "Design Code for Strengthening of Masonry Structure" (GB 50702), "Code for Acceptance of Construction Quality of Strengthening Building Structures" (GB 50550).
1.0.6 The inspection and appraisal on application safety for engineering structural strengthening materials and products shall comply with not only this code but also the current relevant national standards.
2 Terms
2.0.1 Appraisal
A series of activities carried out to verify the reliability (including safety, applicability and durability) of a strengthening material or product in the stressed process of the load bearing member in engineering structure.
2.0.2 Verification test
The test to verify if the property of a strengthening material or product complies with the specified requirements.
2.0.3 Sampling
Process of constituting a sample by randomly taking or under a certain rule.
2.0.4 Sample
The individual(s) taken by specified method from the population, to provide information about the population and severing as a potential basis for determining some characteristic of the population.
2.0.5 Characteristic value of a material property
The basic representative value of a material property. It shall be determined by a quantile, which normally is valued at 0.05, from the probability distribution of the conforming material property.
2.0.6 Substrate
Both the strengthening member and the original member in cementing work are adhered but they are different in property. For distinguishing, the original member or its adhered part is termed as "substrate".
2.0.7 Structural adhesive
The adhesive which is used for cementing load-bearing structure or member and can long term withstand design stress and environmental effect ("structural adhesive" for short)
2.0.8 Primer
The adhesive which is used for surface treatment of the strengthened structural member (substrate) to prevent surface contamination and improve the adhesive property of the surface.
2.0.9 Putty
The adhesive used for repairing and leveling the surface defect on strengthened structural member (substrate). To adapt to the operating conditions on the engineering structure site, putty generally is required to be capable of curing at room temperature and have no exaction to the adhesion surface.
2.0.10 Interfacial adhesive for structure
The adhesive used in engineering structural strengthening works to improve the bonding capacity between new and existing concrete or between existing concrete and new pavement, also known as concrete interface agent for structure.
2.0.11 Pressure injection adhesive for cracks
Contents of GB 50728-2011
Foreword i
1 General Provisions
2 Terms
3 Basic Requirements
4 Structural Adhesive
4.1 General Requirements
4.2 Structural Adhesive for Concrete Substrate
4.3 Structural Adhesive for Masonry Substrates
4.4 Structural Adhesive for Steel Substrates
4.5 Structural Adhesive for Timber Substrates
4.6 Pressure Injection Adhesive for Cracks
4.7 Interfacial Adhesive, Primer and Putty for Structural Strengthening
4.8 Technical Performance Requirements of Structural Adhesive for Engineering Safety
5 Injection Grout for Cracks
5.1 General Requirements
5.2 Safety Appraisal of Injection Grout
6 Cement Based Injection Grout for Structural Strengthening
6.1 General Requirements
6.2 Safety Appraisal of Cement Based Injection Grout
7 Polymer Modified Cement Mortar for Structural Strengthening
7.1 General Requirements
7.2 Safety Appraisal of Polymer Modified Cement Mortar
8 Fiber Reinforced Polymer
8.1 General Requirements
8.2 Carbon Fiber Reinforced Polymer
8.3 Aramid Fiber Reinforced Polymer
8.4 Glass Fiber Reinforced Polymer
9 Steel Wire Rope for Structural Strengthening
9.1 General Requirements
9.2 Steel Wire for Rope Use
9.3 Safety Appraisal of Steel Wire Rope
10 Synthetics Modified Concrete and Mortar
10.1 General Requirements
10.2 Safety Appraisal of Synthetics Modified Concrete and Mortar
11 Steel Fiber Concrete
11.1 General Requirements
11.2 Safety Appraisal of Steel Fiber Concrete
12 Post-installed Connector
12.1 General Requirements
12.2 Material Appraisal of Substrate and Installed Connector
12.3 Safety Appraisal of Post-installed Connector
Appendix A The List of Suitable Testing Method Standards for Safety Appraisal
Appendix B Calculation Method of Characteristic Value of A Material Property
Appendix C Rapid Test Method for Adhesive Durable Wedge
Appendix D Determination Method of Interlaminar Shear Strength of Fiber Reinforced Polymer
Appendix E Determination Method of Splitting Tensile Strength for Filler-rich Adhesive Colloid and Polymer Modified Cement Mortar
Appendix F Determination Method and Assessment Criteria of T Impact Peeling Length for Structural Adhesive
Appendix G Laboratory Determination Method and Assessment Criteria of Tensile Bond Strength for Adhesive Material Agglutinate Reinforcement Material and Substrate
Appendix H Determination Method of Non-volatile Materials Content for Structural Adhesive
Appendix J Determination Method of Damp Heat Ageing Property for Structural Adhesives and Polymer Modified Cement Mortar
Appendix K Determination Method of Bond Strength for Adhesive Agglutinate Steel Bar and Substrate Concrete in Pull Out Constraint Condition
Appendix L Determination Method of Heat Ageing Resistance Ability for Structural Adhesive
Appendix M Determination Method of Fatigue Stress Resistance Ability for Test Piece Connected with Adhesive
Appendix N Determination Method and Evaluation Standard of Compression Shear Bond Strength for Concrete to Concrete
Appendix P Determination Method of Shrinkage for Adhesive Casting (Colloid)
Appendix Q Determination Method of Initial Viscosity for Structural Adhesive
Appendix R Determination Method of Thixotropic Index of Structural Adhesive
Appendix S Determination Method of Flexural Strength of Polymer Modified Cement Mortar and Grouting Material
Appendix T Determination Method of Flexural Toughness of Synthetics Modified Concrete
Appendix U Testing of Anchorage Capacity
Explanation of Wording in the Code
List of Quoted Standards
