JC 688-2006 PDF English
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Glass fiber and magnesium cement board
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| JC/T 688-1998 | English | 319 |
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JC 688-2006: Glass fiber and magnesium cement board---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JC688-2006
Q 10
Record Number. 17696-2006
INDUSTRY STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
Replacing JC 688-1998
Glass Fiber & Magnesium Cement Board
玻镁平板
Issued on May 12, 2006 Implemented on November 01, 2006
Issued by. National Development and Reform Commission of the People's
Republic of China
JC
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Table of Contents
Foreword ... I
1 Scope ... 1
2 Normative References ... 1
3 Classification, Specification and Designation ... 2
4 Requirements for Raw Materials... 2
5 Technical Requirements ... 2
6 Test Methods ... 3
7 Inspection Rules ... 4
8 Marking, Packing, Transport and Storage ... 6
Appendix A (Normative) Determination of Screw Grip Force ... 7
IForeword
Article 5.2 of this standard is mandatory and the rest are recommendatory.
Compared with JC 688-1998, this standard has changed the following main parts.
——Add the content of product scope (Chapter 1);
——Adjust appearance and permissible dimension deviation;
——Cancel product classification;
——Determine index value of rupture strength according to thickness in physical and
mechanical properties (Article 5.2 of 1998 edition and current Article 5.2);
——Add screw grip force, drying shrinkage, bulking factor and moisture content and
cancel tensile strength and water absorption in physical and mechanical properties (Article
5.2 of 1998 edition and current Article 5.2);
——Add chloride ion content index.
Appendix A of this standard is normative.
This standard is proposed by China Building Material Industry Association.
This standard is under the jurisdiction of the National Technical Committee on Cement
Products of Standardization Administration of China.
Drafting organizations of this standard. National Building Material Industrial Magnesia
Cement Product Quality Supervision and Test Center and Guangzhou New GEP Decoration
Material Co., Ltd.
Participating drafting organizations of this standard. Owens Corning (China)
Investment Co., Ltd. and Gain Leader New Type Decorative Material Co., Ltd.
Chief drafting staff of this standard. Yu Xuefei, Fu Zhihong, Xie Meng, Fu Jianbiao, Fu
Lisheng, Liu Wenqing, Yao Guangning, Hua Haidong, Zhang Qin hui, Bao Jianguo.
National Building Material Industrial Magnesia Cement Product Quality Supervision
and Test Center is entrusted to be responsible for the explanation of this standard.
The previous edition of the standards replaced by this standard is as. JC 688-1998.
1PROFESSIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
Glass Fiber & Magnesium Cement Board
1 Scope
This standard specifies classification, requirements for raw materials, technical
requirements, test methods, inspection rules, packing, transport, marking and storage of
glass fiber & magnesium cement board.
This standard is applicable to glass fiber & magnesium cement board made through
mechanical rolling by reasonably preparing and modifying magnesium oxide (MgO),
magnesium chloride (MgCl2) or magnesium sulfate (MgSO4) and water (H2O) ternary
system, reinforcing with glass fiber mesh or other materials and taking light materials as the
filler.
Glass fiber & magnesium cement board is mainly used for indoor non-bearing internal
partition wall and suspended ceiling and for baseplates of various decorative sheets.
2 Normative References
The following standards contain provisions which, through reference in this text,
constitute provisions of this standard. For dated reference, subsequent amendments to
(excluding correction to), or revisions of, any of these publications do not apply. However,
all parties coming to an agreement according to this standard are encouraged to study
whether the latest edition of these documents is applicable. For undated references, the latest
edition of the normative document is applicable to this standard.
GB/T 5464-1999 "Non-combustibility Test Method for Building Materials"
GB/T 701.9-1997 "Test Methods for Fiber Cement Products"
GB/T 8077-2000 "Methods for Testing Uniformity of Concrete Admixture"
GB 8624-1997 "Classification for Burning Behavior of Building Materials and
Products"
GB/T 9775-1999 "Gypsum Plasterboard"
JC/T 449-2000 "Raw Materials for Magnesia Cement"
JC 561-1994 "Fiber Glass Mesh"
JC 646 "Technical Standard for Glass Fiber Magnesium Oxychloride Cement and
Composite Material Ventilation Duct"
46.1 Specimen
6.1.1 The specimen curing age shall not be less than 28d.
6.1.2 3 specimens shall be a group for detecting appearance quality, specification and
dimension, and then each specimen shall be sampled for determining the physical and
mechanical properties.
6.1.3 The specimens shall be in an environment with 25 ±3 and relative humidity ℃ ℃ less
than or equal to 90% for 2d.
6.2 Test procedure
6.2.1 Specification, dimension and appearance quality shall be carried out according to
GB/T 9775-1999.
6.2.2 Rupture strength, moisture content, apparent density and shock strength tests shall be
carried out according to JC 646.
6.2.3 Drying shrinkage and bulking factor shall be carried out according to GB/T
7019-1997.
6.2.4 Screw grip force shall be carried out according to Appendix A (Normative).
6.2.5 Chloride ion content shall be carried out according to GB/T 8077-2000.
6.2.6 Non-combustibility shall be carried out according to GB/T 5464-1999.
6.2.7 Halogenide resistance. randomly cut one 200mm×200mm block respectively on 3
plates of one group of specimens, put them into a temperature humidity chamber with
relative humidity larger than or equal to 90% and temperature at 30 ~35 , and take them ℃ ℃
out after 24h to observe whether there is water drop or damp.
7 Inspection Rules
7.1 Inspection items
7.1.1 Delivery inspection. including specification and dimension, appearance quality,
rupture strength and halogenide resistance.
7.1.2 Type inspection. all items in technical requirements.
7.2 Sampling and judgment
7.2.1 Delivery inspection
7.2.1.1 Batch
2000 glass fiber & magnesium cement boards with the identical grade and identical
specification shall be taken as one batch, if insufficient, it may also be taken as one batch for
examination. The acceptance shall be carried out in the manufacturing plant.
7.2.1.2 Judgment of sampling
a) Appearance quality and specification and dimension inspection. 3 boards from
each batch shall be taken from different stacks for appearance quality and specification and
dimension inspection. If one item of 1 board therein does not conform to the standard
requirements, double boards shall be taken from the identical batch for reinspection of this
item, ;
b) Inspection of physical and mechanical properties. use above-mentioned 3
specimens with qualified appearance and dimension deviation to conduct rupture strength
and halogenide resistance test, if any index does not conform to this standard requirements,
6c) For the acceptance of moisture content, apparent density, halogenide resistance and
fire resistance of glass fiber & magnesium cement board, 3 specimens shall be cut randomly
from the identical batch, if the test result of one board does not meet the requirements,
double boards shall be taken for reinspection. If the test result of one board does not meet
the requirements still after reinspection, this batch of products shall be judged as rejected
products;
d) Judgment. when all the indexes in type inspection meet this standard requirements,
this batch of products shall be judged as qualified.
8 Marking, Packing, Transport and Storage
8.1 Marking
In delivery, the manufacturer shall issue product certificate and supply it to the user
accompanied with product, and indicate therein.
a) Manufacturer name, address and trademark;
b) Product batch number and product mark;
c) Product inspection result;
d) Signature of inspection department and inspector.
8.2 Packing
The front of each glass fiber & magnesium cement board shall be indicated with
manufacturer name, production date and product specification via fadeless paint. The
products may be packed through container or bundling, and the packing shall guarantee
product safety and handling convenience. Designation and batch number shall be indicated
on the package.
8.3 Transport
In transport and handling, the products shall be fixed and free from throwing and
mutual impact; the bottom surface of transport means shall be flat and smooth and provided
with rain protection measures.
8.4 Storage
Glass fiber & magnesium cement boards shall be stacked according to different grades
and specifications. The stacking site must be flat, solid and rainproof.
...
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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