GB/T 9775-2008 English PDF (GBT9775-2008)

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GB/T 9775-2008: Gypsum plasterboard
GB/T 9775-2008
ICS 91.100.10
Q 62
GB
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
Replacing GB/T 9775-1999
Gypsum plasterboard
纸面石膏板
(ISO 6308.1980, MOD)
ISSUED ON. JUNE 30, 2008
IMPLEMENTED ON. APRIL 01, 2009
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 5 
4 Classification and marking ... 7 
5 Requirements ... 9 
6 Test methods ... 11 
7 Inspection rules ... 24 
8 Marking, packaging, storage, and transport ... 26 
Appendix A (Informative) Clause number comparison between this Standard
AND ISO 6308.1980 ... 27 
Appendix B (Normative) Measurement of moisture deflection ... 30 
Foreword
This Standard, through modification, adopts the international standard ISO
6308.1980 "Gypsum plasterboard - specification" (English version).
This Standard was redrafted based on ISO 6308.1980.
As for the clause number comparison between this Standard and ISO
6308.1980, SEE Appendix A.
As compared with ISO 6308.1980, this Standard has the following technical
differences.
- In this Standard, ADD the sheet types, requirements, and test methods
for the water and fire resistant gypsum plasterboard;
- In this Standard, ADD the requirements and tests methods for the
appearance quality, diagonal length difference, surface density,
hardness, impact resistance, bond performance of covering paper and
core material, water absorption rate, surface water absorption amount,
and fire stability.
- In this Standard, ADD the length specifications of a variety of gypsum
plasterboard;
- In this Standard, ADD the thickness specification of 18.0 mm, 21.0 mm,
and 25.0 mm gypsum plasterboard;
- In this Standard, ADJUST one thickness specification of gypsum
plasterboard from 12.5 mm to 12.0 mm;
- In this Standard, ADD the inspection rules;
- In this Standard, ADD the marking, packaging, storage, and transport;
- In this Standard, ADD Appendix A, Appendix B, and Appendix C.
This Standard replaces GB/T 9775-1999 "Gypsum plasterboard".
As compared with GB / T9775-1999, the main changes of this Standard are
as below.
- In this Standard, ADD the requirements and test methods for the
hardness and impact resistance (5.7, 5.8 and 6.5.10, 6.5.11 of this
version);
- In this Standard, ADD the sheet types of water and fire resistant gypsum
plasterboard (3.1 of 1999 version; 4.1.1 of this version);
- In this Standard, ADD the length specifications of 1500 mm, 2440 mm,
3660 mm (3.2.1 of 1999 version; 4.1.3.1 of this version);
- In this Standard, ADD the width specifications of 600 mm, 1220 mm
(3.2.2 of 1999 version; 4.1.3.2 of this version);
- In this Standard, ADJUST the breaking load requirements for the gypsum
plasterboard of different specifications (4.5 of 1999 version; 5.6 of this
version);
- In this Standard, MODIFY the item “unit area mass” into “surface density”
(4.6, 5.3.8, 6.4.2 of 1999 version; 5.5, 6.5.8, 7.4.3 of this version);
- In this Standard, ADD Appendix A, Appendix B and Appendix C.
Appendix B and Appendix C of this Standard are normative appendixes, AND
Appendix A is informative appendix.
This standard was proposed by the China Building Materials Federation.
The standard shall be under the jurisdiction of the National Light and
Decorative Building Materials Standardization Technical Committee (SAC/TC
195).
This standard was responsibly drafted by China New Building Materials
Industry Hangzhou Design and Study Institute.
The participating drafting organizations of this standard. Beixin Group
Building Materials Co., Ltd., Knauf Gypsum Board (Wuhu) Co., Ltd.,
Shanghai Lafarge Stone (Shanghai) Co., Ltd., Gobain Gypsum Building
Material (Shanghai) Co., Ltd., Shandong Bayer Building Materials Co., Ltd.,
Jason Gypsum Board (Jiaxing) Co., Ltd., Tai'an Kangyijia Building Materials
Limited Liability Company, Linyi Huawei Gypsum Building Materials Co., Ltd.,
Shandong Jinxin New Building Materials Co., Ltd., Taishan Gypsum Co., Ltd.,
Tongling Faraday Building Materials Co., Ltd., Jinzhou City New Building
Material Factory, Zaozhuang Huarun Paper Co., Ltd.
The main drafters of this standard. Wei Chaoping, Zhai Yuezhong, Chen
Xuye.
This Standard replaces the standard previously issued as follows.
- GB 9775-1988, GB/T 9775-1999.
Gypsum plasterboard
1 Scope
This standard specifies the terms and definitions, classification and marking,
requirements, test methods, inspection rules, marking, packaging, storage
and transport of gypsum plasterboard.
This standard is applicable to the gypsum plasterboard which is used as the
unloaded interior partition wall AND suspended ceiling in building; it is also
applicable to the base plate for the decorative gypsum plasterboard which
needs secondary facing processing.
2 Normative references
The provisions in following documents become the provisions of this
Standard through reference in this Standard. For the dated references, the
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard; however, parties who reach an agreement based on this
Standard are encouraged to study if the latest versions of these documents
are applicable. For undated references, the latest edition of the referenced
document applies.
GB/T 1250 Representation and determination methods of limit value
GB/T 9776 Calcined gypsum
3 Terms and definitions
The following terms and definitions apply to this Standard.
3.1
Edge
It refers to the paper-covered longitudinal edge.
3.2
End
It refers to the cutting edge perpendicular to the edge.
The sheet’s water absorption rate shall not be less than 10%.
5.11 Surface water absorption amount (only applicable to water
resistant gypsum plasterboard AND water and fire resistant gypsum
plasterboard)
The sheet’s surface water absorption amount shall be not more than 160
g/m2.
5.12 Fire stability (only applicable to fire resistant gypsum plasterboard
AND water and fire resistant gypsum plasterboard)
The sheet’s fire stability duration shall not be less than 20 min.
5.13 Moisture deflection
It shall be determined by the Supplier and Demander through negotiation.
5.14 Shear force
It shall be determined by the Supplier and Demander through negotiation.
6 Test methods
6.1 Test equipment and instruments
6.1.1 Steel tape. the maximum range is 5000 mm, AND the scale value is 1
mm.
6.1.2 Steel ruler. the maximum range is 1000 mm, AND the scale value is 1
mm.
6.1.3 Thickness tester. the maximum range is 30 mm, AND the scale value is
0.01 mm.
6.1.4 Wedge edge depth tester. the maximum range is 10 mm, AND the
scale value is 0.01 mm.
6.1.5 Electronic scale. the sensitivity is 1 g.
6.1.6 Electronic balance. the sensitivity is 0.01 g.
6.1.7 Electric blast oven. the maximum temperature is 300 °C, and the
temperature controller sensitivity is ± 1 °C.
6.1.8 Sheet bending tester. the maximum range is 2000 N, AND the accuracy
is level 1.
6.1.9 Pressure tester. the maximum range is 2000 N, AND the accuracy is
level 1.
6.1.10 Impact resistance tester. the steel ball diameter is 50 mm, AND the
steel ball mass is 510 g.
6.1.11 Covering paper and gypsum core bond tester. ...