GB 28376-2026 Fireproof board for tunnel English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB 28376-2026
Fireproof board for tunnel
隧道防火保护板
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification, grading and marking
4.1 Classification
4.2 Fire resistance grading
4.3 Marking
5 Technical requirements
5.1 Appearance quality
5.2 Dimensional deviations
5.3 Edge straightness
5.4 Surface density
5.5 Dry flexural strength
5.6 Flexural strength in water-saturated state
5.7 Vibration resistance
5.8 Water absorption and water absorption deformation rate
5.9 Halogen return resistance
5.10 Water resistance
5.11 Acid resistance
5.12 Alkali resistance
5.13 Damp heat resistance
5.14 Temperature change resistance
5.15 Salt spray corrosion resistance
5.16 Burning behaviour
5.17 Fire resistance
6 Test methods
6.1 Instruments and equipment
6.2 Preparation of test specimens
6.3 Appearance quality
6.4 Dimensional deviations
6.5 Edge straightness
6.6 Surface density
6.7 Dry flexural strength
6.8 Flexural strength in water-saturated state
6.9 Vibration resistance
6.10 Water absorption and water absorption deformation rate
6.11 Halogen return resistance
6.12 Water resistance
6.13 Acid resistance
6.14 Alkali resistance
6.15 Damp heat resistance
6.16 Temperature change resistance
6.17 Salt spray corrosion resistance
6.18 Burning behaviour
6.19 Fire resistance
7 Inspection rules
7.1 Classification of inspection
7.2 Batching and sampling
7.3 Judgment rules
8 Marking, packaging, transportation and storage
8.1 Marking
8.2 Packaging
8.3 Transportation
8.4 Storage
Annex A (normative) RWS temperature rise curve
A.1 Temperature-time data and curve
A.2 Furnace temperature uniformity requirements
A.3 Deviations
Annex B (normative) Vibration resistance test method
B.1 Test apparatus
B.2 Specimen installation and loading
B.3 Test procedure
Fireproof boards for tunnels
1 Scope
This document defines the terms for fireproof boards for tunnels, specifies the product classification, grading and marking, technical requirements, inspection rules, marking, packaging, transportation and storage for fireproof boards for tunnels, and describes the corresponding test methods.
This document is applicable to fireproof boards used on tunnel structure surfaces.
Note: Where no confusion arises, "fireproof boards for tunnels" in this document is referred to as "boards".
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 191, Packaging — Pictorial marking for handling of goods
GB/T 7019, Test methods for fibre cement products
GB 8624, Classification for burning behaviour of building materials and products
GB/T 9265, Determination of alkali resistance of coatings for architectural paints
GB/T 9978.1, Fire-resistance tests — Elements of building construction — Part 1: General requirements
GB 28375, Fireproof coatings for concrete structures
GB/T 50010, Standard for design of concrete structures
XF/T 714, Rapid temperature rise fire resistance test method for fire protective materials for structural members
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
tunnel
An enclosed passage engineering structure with a length greater than its width, used for the passage or crossing of vehicles, pedestrians, pipelines, etc.
3.2
steel-shell and concrete composite tunnel structure
A tunnel in which steel plates combined with concrete or reinforced concrete form the main load-bearing structure.
3.3
fireproof board for tunnel
A fireproof board fixed and installed on the tunnel structure surface, capable of improving the fire resistance limit of the tunnel structure.
3.4
single-composition fireproof board for tunnel
A fireproof board for tunnels composed of a single homogeneous material.
3.5
fireproof composition board for tunnel
A fireproof board for tunnels composed of two or more materials (including decorative face panels) laminated together.
4 Product classification, grading and marking
4.1 Classification
Fireproof boards for tunnels are classified by application scenario, structure and fire resistance test temperature rise curve, respectively.
— By application scenario:
● Fireproof boards for tunnels used on concrete structure tunnel surfaces, denoted by the symbol H;
● Fireproof boards for tunnels used on steel-shell and concrete composite tunnel structure surfaces, denoted by the symbol G.
— By structure:
● Single-composition fireproof boards for tunnels, denoted by the symbol D;
● Fireproof composition boards for tunnels, denoted by the symbol F.
— By fire resistance test temperature rise curve:
● Fireproof boards for tunnels tested for fire resistance in accordance with the standard temperature rise curve specified in GB/T 9978.1, denoted by the symbol BZ;
● Fireproof boards for tunnels tested for fire resistance in accordance with the HC temperature rise curve specified in XF/T 714, denoted by the symbol HC;
● Fireproof boards for tunnels tested for fire resistance in accordance with the RABT temperature rise curve specified in XF/T 714, denoted by the symbol RABT;
● Fireproof boards for tunnels tested for fire resistance in accordance with the electric power fire resistance test temperature rise curve specified in XF/T 714, denoted by the symbol DL;
● Fireproof boards for tunnels tested for fire resistance in accordance with the RWS temperature rise curve specified in Annex A, denoted by the symbol RWS.
4.2 Fire resistance grading
The fire resistance limits of fireproof boards for tunnels are classified as: 1.50 h, 2.00 h, 2.50 h and 3.00 h.
The fire resistance grading codes of fireproof boards for tunnels shall comply with the provisions of Table 1.
4.3 Marking
The marking method for fireproof boards for tunnels is:
Example 1: SHB-H-D-FBZ2.00-A, indicating a single-composition fireproof board for tunnels applied to concrete structure tunnel surfaces, with a standard curve temperature rise, a manufacturer-defined code of A, and a fire resistance of 2.00 h.
Example 2: SHB-G-F-FHC3.00/FRWS2.00, indicating a fireproof composition board for tunnels applied to steel-shell and concrete composite tunnel structure surfaces, with an HC curve temperature rise, a fire resistance of 3.00 h, and with an RWS curve temperature rise, a fire resistance of 2.00 h.
Example 3: SHB-G-D-FRABT1.50, indicating a single-composition fireproof board for tunnels applied to steel-shell and concrete composite tunnel structure surfaces, with an RABT curve temperature rise, and a fire resistance of 1.50 h for the temperature rise and constant temperature phases and 1.83 h for the cooling phase.
Example 4: SHB-H-D-FRWS2.00, indicating a single-composition fireproof board for tunnels applied to concrete structure tunnel surfaces, with an RWS curve temperature rise, and a fire resistance of 2.00 h.
5 Technical requirements
5.1 Appearance quality
The board shall have at least one flat surface, and shall be free from defects such as cracks, delamination, missing edges, missing corners, blistering, holes and depressions.
5.2 Dimensional deviations
The permissible deviations of the length and width dimensions of the board shall be ±3 mm. When the board length is less than or equal to 2,000 mm, the diagonal difference shall be less than 3 mm; when the board length is greater than 2,000 mm, the diagonal difference shall be less than 5 mm. The thickness dimensional deviations of the board shall comply with the provisions of Table 2.
5.3 Edge straightness
The edge straightness of the board shall be less than 3.0 ‰, and the maximum distance from the reference straight line shall be less than 3.0 mm.
5.4 Surface density
The surface density of the board shall not exceed 30 kg/m².
5.5 Dry flexural strength
The dry flexural strength of the board shall not be less than 6 MPa.
5.6 Flexural strength in water-saturated state
The flexural strength of the board in the water-saturated state shall not be less than 70 % of the dry flexural strength.
5.7 Vibration resistance
During the vibration test, single-composition fireproof boards for tunnels shall be free from cracking, layering and falling off; fireproof composition boards for tunnels shall be free from cracking, layering, delamination and falling off. After the vibration test, the flexural strength of the board shall not be less than 70 % of the dry flexural strength.
5.8 Water absorption and water absorption deformation rate
The water absorption of the board shall not exceed the manufacturer's stated value, and the water absorption deformation rate shall not exceed 0.20 %.
5.9 Halogen return resistance
After the test, the board shall be free from water droplets and moisture return.
5.10 Water resistance
After the test, single-composition fireproof boards for tunnels shall be free from cracking, layering and falling off, with slight swelling and discolouration permitted; fireproof composition boards for tunnels shall be free from cracking, layering, delamination and falling off, with slight swelling and discolouration permitted. If the decorative face panel of the fireproof composition board for tunnels is made of metal material, its metal surface shall be free from rust.
Standard
GB 28376-2026 Fireproof board for tunnel (English)
GB 28376-2026 Fireproof board for tunnel English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB 28376-2026
Fireproof board for tunnel
隧道防火保护板
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification, grading and marking
4.1 Classification
4.2 Fire resistance grading
4.3 Marking
5 Technical requirements
5.1 Appearance quality
5.2 Dimensional deviations
5.3 Edge straightness
5.4 Surface density
5.5 Dry flexural strength
5.6 Flexural strength in water-saturated state
5.7 Vibration resistance
5.8 Water absorption and water absorption deformation rate
5.9 Halogen return resistance
5.10 Water resistance
5.11 Acid resistance
5.12 Alkali resistance
5.13 Damp heat resistance
5.14 Temperature change resistance
5.15 Salt spray corrosion resistance
5.16 Burning behaviour
5.17 Fire resistance
6 Test methods
6.1 Instruments and equipment
6.2 Preparation of test specimens
6.3 Appearance quality
6.4 Dimensional deviations
6.5 Edge straightness
6.6 Surface density
6.7 Dry flexural strength
6.8 Flexural strength in water-saturated state
6.9 Vibration resistance
6.10 Water absorption and water absorption deformation rate
6.11 Halogen return resistance
6.12 Water resistance
6.13 Acid resistance
6.14 Alkali resistance
6.15 Damp heat resistance
6.16 Temperature change resistance
6.17 Salt spray corrosion resistance
6.18 Burning behaviour
6.19 Fire resistance
7 Inspection rules
7.1 Classification of inspection
7.2 Batching and sampling
7.3 Judgment rules
8 Marking, packaging, transportation and storage
8.1 Marking
8.2 Packaging
8.3 Transportation
8.4 Storage
Annex A (normative) RWS temperature rise curve
A.1 Temperature-time data and curve
A.2 Furnace temperature uniformity requirements
A.3 Deviations
Annex B (normative) Vibration resistance test method
B.1 Test apparatus
B.2 Specimen installation and loading
B.3 Test procedure
Fireproof boards for tunnels
1 Scope
This document defines the terms for fireproof boards for tunnels, specifies the product classification, grading and marking, technical requirements, inspection rules, marking, packaging, transportation and storage for fireproof boards for tunnels, and describes the corresponding test methods.
This document is applicable to fireproof boards used on tunnel structure surfaces.
Note: Where no confusion arises, "fireproof boards for tunnels" in this document is referred to as "boards".
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 191, Packaging — Pictorial marking for handling of goods
GB/T 7019, Test methods for fibre cement products
GB 8624, Classification for burning behaviour of building materials and products
GB/T 9265, Determination of alkali resistance of coatings for architectural paints
GB/T 9978.1, Fire-resistance tests — Elements of building construction — Part 1: General requirements
GB 28375, Fireproof coatings for concrete structures
GB/T 50010, Standard for design of concrete structures
XF/T 714, Rapid temperature rise fire resistance test method for fire protective materials for structural members
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
tunnel
An enclosed passage engineering structure with a length greater than its width, used for the passage or crossing of vehicles, pedestrians, pipelines, etc.
3.2
steel-shell and concrete composite tunnel structure
A tunnel in which steel plates combined with concrete or reinforced concrete form the main load-bearing structure.
3.3
fireproof board for tunnel
A fireproof board fixed and installed on the tunnel structure surface, capable of improving the fire resistance limit of the tunnel structure.
3.4
single-composition fireproof board for tunnel
A fireproof board for tunnels composed of a single homogeneous material.
3.5
fireproof composition board for tunnel
A fireproof board for tunnels composed of two or more materials (including decorative face panels) laminated together.
4 Product classification, grading and marking
4.1 Classification
Fireproof boards for tunnels are classified by application scenario, structure and fire resistance test temperature rise curve, respectively.
— By application scenario:
● Fireproof boards for tunnels used on concrete structure tunnel surfaces, denoted by the symbol H;
● Fireproof boards for tunnels used on steel-shell and concrete composite tunnel structure surfaces, denoted by the symbol G.
— By structure:
● Single-composition fireproof boards for tunnels, denoted by the symbol D;
● Fireproof composition boards for tunnels, denoted by the symbol F.
— By fire resistance test temperature rise curve:
● Fireproof boards for tunnels tested for fire resistance in accordance with the standard temperature rise curve specified in GB/T 9978.1, denoted by the symbol BZ;
● Fireproof boards for tunnels tested for fire resistance in accordance with the HC temperature rise curve specified in XF/T 714, denoted by the symbol HC;
● Fireproof boards for tunnels tested for fire resistance in accordance with the RABT temperature rise curve specified in XF/T 714, denoted by the symbol RABT;
● Fireproof boards for tunnels tested for fire resistance in accordance with the electric power fire resistance test temperature rise curve specified in XF/T 714, denoted by the symbol DL;
● Fireproof boards for tunnels tested for fire resistance in accordance with the RWS temperature rise curve specified in Annex A, denoted by the symbol RWS.
4.2 Fire resistance grading
The fire resistance limits of fireproof boards for tunnels are classified as: 1.50 h, 2.00 h, 2.50 h and 3.00 h.
The fire resistance grading codes of fireproof boards for tunnels shall comply with the provisions of Table 1.
4.3 Marking
The marking method for fireproof boards for tunnels is:
Example 1: SHB-H-D-FBZ2.00-A, indicating a single-composition fireproof board for tunnels applied to concrete structure tunnel surfaces, with a standard curve temperature rise, a manufacturer-defined code of A, and a fire resistance of 2.00 h.
Example 2: SHB-G-F-FHC3.00/FRWS2.00, indicating a fireproof composition board for tunnels applied to steel-shell and concrete composite tunnel structure surfaces, with an HC curve temperature rise, a fire resistance of 3.00 h, and with an RWS curve temperature rise, a fire resistance of 2.00 h.
Example 3: SHB-G-D-FRABT1.50, indicating a single-composition fireproof board for tunnels applied to steel-shell and concrete composite tunnel structure surfaces, with an RABT curve temperature rise, and a fire resistance of 1.50 h for the temperature rise and constant temperature phases and 1.83 h for the cooling phase.
Example 4: SHB-H-D-FRWS2.00, indicating a single-composition fireproof board for tunnels applied to concrete structure tunnel surfaces, with an RWS curve temperature rise, and a fire resistance of 2.00 h.
5 Technical requirements
5.1 Appearance quality
The board shall have at least one flat surface, and shall be free from defects such as cracks, delamination, missing edges, missing corners, blistering, holes and depressions.
5.2 Dimensional deviations
The permissible deviations of the length and width dimensions of the board shall be ±3 mm. When the board length is less than or equal to 2,000 mm, the diagonal difference shall be less than 3 mm; when the board length is greater than 2,000 mm, the diagonal difference shall be less than 5 mm. The thickness dimensional deviations of the board shall comply with the provisions of Table 2.
5.3 Edge straightness
The edge straightness of the board shall be less than 3.0 ‰, and the maximum distance from the reference straight line shall be less than 3.0 mm.
5.4 Surface density
The surface density of the board shall not exceed 30 kg/m².
5.5 Dry flexural strength
The dry flexural strength of the board shall not be less than 6 MPa.
5.6 Flexural strength in water-saturated state
The flexural strength of the board in the water-saturated state shall not be less than 70 % of the dry flexural strength.
5.7 Vibration resistance
During the vibration test, single-composition fireproof boards for tunnels shall be free from cracking, layering and falling off; fireproof composition boards for tunnels shall be free from cracking, layering, delamination and falling off. After the vibration test, the flexural strength of the board shall not be less than 70 % of the dry flexural strength.
5.8 Water absorption and water absorption deformation rate
The water absorption of the board shall not exceed the manufacturer's stated value, and the water absorption deformation rate shall not exceed 0.20 %.
5.9 Halogen return resistance
After the test, the board shall be free from water droplets and moisture return.
5.10 Water resistance
After the test, single-composition fireproof boards for tunnels shall be free from cracking, layering and falling off, with slight swelling and discolouration permitted; fireproof composition boards for tunnels shall be free from cracking, layering, delamination and falling off, with slight swelling and discolouration permitted. If the decorative face panel of the fireproof composition board for tunnels is made of metal material, its metal surface shall be free from rust.
