Issued by State Administration for Market Regulation of the People's Republic of China
the Standardization Administration of the People's Republic of China
Gypsum plasterboard
1 Scope
This document specifies the classification and labeling, raw materials, requirements, test methods, inspection rules, marking, packaging, transportation and storage of gypsum plasterboard.
This document is applicable to the gypsum plasterboards used as non-load-bearing indoor wall and ceiling in buildings, and also to those used as substrate of secondary processing products.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 9776 Calcined gypsum
GB/T 26204 Plaster liner board
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 9776 and the following apply.
3.1
edge
longitudinal edge covered with paper
3.2
end
cutting edge of the vertical edge
3.3
face
surface of the protective paper without overlap
3.4
back
surface of the protective paper with overlap
3.5
facepaper
protective paper on the front of the product
3.6
back paper
protective paper on the back of the product
3.7
core material
material covered with protective paper and mainly composed of gypsum dihydrate (CaSO4 · 2H2 O)
3.8
normal gypsum plasterboard
building material with building gypsum used as the main raw material, mixed with a proper amount of additives, stirred with water, poured between the face paper and the back paper of the protective paper, and firmly bonded with the protective paper
3.9
normal gypsum plasterboard
gypsum plasterboard with no special properties
3.10
water-resistant gypsum plasterboard
gypsum plasterboard with good water resistance
3.11
moisture-resistant gypsum plasterboard
gypsum plasterboard with some water resistance
3.12
fire-resistant gypsum plasterboard
gypsum plasterboard with fire resistance
3.13
water-resistant and fire-resistant gypsum plasterboard
gypsum plasterboard with good water and fire resistance
3.14
moisture-resistant and fire-resistant gypsum plasterboard
gypsum plasterboard with some water and fire resistance
3.15
calcined gypsum
powdery cementitious material for building materials, which is prepared by calcination and dehydration of natural gypsum or industrial by-product gypsum at a certain temperature, with β -calcium sulfate hemihydrate (β-CaSO4 · 1/2H2O) as the main component, without any additives
4 Classification and labeling
4.1 Classification
4.1.1 Product category and code
By functions: normal gypsum plasterboard (P), water-resistant gypsum plasterboard (S), moisture-resistant gypsum plasterboard (T), fire-resistant gypsum plasterboard (T), water-resistant and fire-resistant gypsum plasterboard (SH), water-resistant and fire-resistant gypsum plasterboard (TH).
4.1.2 Edge shape and code
By edge shape: rectangular (J), chamfer (D), wedge (C) and round (Y) (see Figure 1~ Figure 4), and products with other edge shapes can also be produced according to user requirements.
Figure 1 Rectangular (J)
In millimeters
Figure 2 Chamfer (D)
Figure 3 Wedge (C)
Figure 4 Circular (Y)
4.1.3 Specification and dimension
4.1.3.1 The nominal length is 1500 mm, 1800 mm, 2100 mm, 2400 mm, 2440 mm, 2700 mm, 3000 mm, 3300 mm, 3600 mm and 3660 mm.
4.1.3.2 The nominal width is 600 mm, 900 mm, 1200 mm and 1220 mm.
4.1.3.3 The nominal thickness is 9.5 mm, 12.0 mm, 15.0 mm, 18.0 mm, 21.0 mm and 25.0 mm.
4.2 Labeling
Products shall be labeled according to product name, type code, edge shape code, length, width, thickness and the number of this standard..
Example 1: a water-resistant and fire-resistant gypsum plasterboard with a length of 3000 mm, a width of 1200 mm and a thickness of 12.0 mm and a wedge-shaped edge, shall be labeled as: gypsum plasterboard SHC 3000× 1200× 12.0 GB/T 9775-2025.
Example 2: a normal gypsum plasterboard with a length of 3000 mm, a width of 1200 mm and a thickness of 12.0 mm and a wedge-shaped edge, shall be labeled as: gypsum plasterboard PC 3000× 1200× 12.0 GB/T 9775-2025.
5 Raw materials
5.1 Calcined gypsum shall meet the requirements of GB/T 9776.
5.2 Protective paper shall meet the requirements of GB/T 26204.
