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GB/T 33544-2017

Chinese Standard: 'GB/T 33544-2017'
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Detail Information of GB/T 33544-2017; GB/T33544-2017
Description (Translated English): Glass fiber and magnesium cement board
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q14
Classification of International Standard: 91.100.30
Word Count Estimation: 15,152
Date of Issue: 2017-03-09
Date of Implementation: 2018-02-01
Quoted Standard: GB/T 100; GB/T 1043.1; GB/T 5464; GB 6566; GB/T 7019; GB/T 8077-2012; GB 8624; GB/T 9775; GB/T 17657; GB 18580; HG/T 2680-2009; JC/T 449-2008; JC 561.2; JC 646; JGJ 63; WB/T 1023
Drafting Organization: Hefei Cement Research and Design Institute, Zhangjiagang Shenggang Green Fire Building Material Co., Ltd., Guangzhou New Green Ring Flame Retardant Decoration Materials Co., Ltd.
Administrative Organization: National Standardization Technical Committee for Cement Products (SAC/TC 197)
Regulation (derived from): National Standard Notice No. 5 of 2017
Proposing organization: China Building Materials Federation
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee
Summary: This standard specifies the terms and definitions of glass magnesium plates, classification and labeling, requirements, test methods, inspection rules, marking, packaging, transportation and storage. This standard applies to glass magnesium plate, mainly for indoor non-load-bearing wall and ceiling, and various types of decorative board substrate.

GB/T 33544-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.100.30
Q 14
Glass fiber and magnesium cement board
玻镁平板
ISSUED ON. MARCH 9, 2017
IMPLEMENTED ON. FEBRUARY 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
China National Standardization Administration.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 5 
4 Classification and marking ... 5 
5 Requirements ... 6 
6 Test methods ... 9 
7 Inspection rules ... 11 
8 Signs, packaging, transportation and storage ... 13 
Appendix A (Normative) Determination of chloride ion content ... 14 
Appendix B (Normative) Determination of leachable chloride ion content ... 16 
Appendix C (Normative) Determination of gripping screw force ... 18 
Foreword
This standard was drafted in accordance with the rules given in GB/T
1.1-2009.
This standard was proposed by China Federation of Building Materials.
This standard shall be under the jurisdiction of National Cement Products
Standardization Technical Committee (SAC/TC 197).
The drafting organizations of this standard. Hefei Cement Research and
Design Institute, Zhangjiagang Shenggang Green Fireproof Building Material
Co., Ltd., Guangzhou New Green Ring Fire-retardant Decorative Materials Co.,
Ltd.
The organizations of participating in the drafting of this standard. Zhongshan
Zhengchuan Environmental Protection Decorative Building Materials Co., Ltd.,
Guangdong Yijian Green Residential Materials Industry Co., Ltd., Zhuoda New
Material Technology Group Co., Ltd., LiyangHaotai Board Industry Co., Ltd.,
Yucheng Chenlong New Building Material Co., Ltd., Beijing Green Building
Technology Co., Ltd., Jiangxi Xianghe Industrial Co., Ltd., Zhangjiagang Yihao
Plate Co., Ltd., Jiangxi Zhongpeng Building Material Co., Ltd., Shandong
Yangtze River Grain & Oil Storage Machinery Co., Ltd., Shandong Weishan
Grand Canal Building Material Co., Ltd., Dongguan Jiameide New Decoration
Materials Co., Ltd., Shanghai XiangPiao Board Fireproofing Manufacturing Co.,
Ltd., Zhongshan Zongke Building Materials Co., Ltd., China Building Materials
Inspection & Certification Group Anhui Co., Ltd.
The main drafters of this standard. Yu Xuefei, Wang Zurun, Ge Tinghong, Fu
Zhihong, Xie Meng, Xia Junya, Wan Changda, Zhang Cheng, Zhong Weiqiang,
Liu Kaicai, Ji Yong, Han Shuaijie, Wang Jichang, Wu Xulin, Gao Yanhui, Ye
Chao, Qian Feng, Xiao Chuanwei, Yang Changhai, Liu Zhaojin, Li Zhonghua,
Yao Guangning, Bao Yuancheng, ZhangQinhui, Wu Gang, Mu Luying, Wu
Ying, Wang Jinnan, Wang Bo, Qi Hui, Shi Yong, Yang Fei, Duan Yuanyuan,
Tong Zongrong, Fu Jianbiao, Yao Jian, Xu Xiujuan, Wang Hai, Wu Shaohong,
Xiao Chuanming, Xu Jun, He Jingzhi, Wu Jianming.
Glass fiber and magnesium cement board
1 Scope
This standard specifies the terms and definitions, classification and marking,
requirements, test methods, inspection rules, signs, packaging, transportation
and storage of glass fiber and magnesium cement board.
This standard applies to glass fiber and magnesium cement board, which is
mainly used for indoor non-load-bearing inner wall and ceiling, as well as the
base material of various types of decorative board.
2 Normative references
The following documents are essential for the application of this document. For
dated references, only the dated version applies to this document. For undated
references, the latest version (including all amendments) applies to this
document.
GB/T 100 Slotted countersunk head wood screws
GB/T 1043.1 Plastics - Determination of Charpy impact properties - Part 1.
Non-instrumented impact test
GB/T 5464 Non-combustibility test method for building materials
GB 6566 Limits of radionuclides in building materials
GB/T 7019 Test methods for fiber cement products
GB/T 8077-2012 Methods for testing uniformity of concrete admixture
GB 8624 Classification for burning behavior of building materials and
products
GB/T 9775 Gypsum plasterboard
GB/T 17657 Test methods of evaluating the properties of wood-based
panels and surface decorated wood-based panels
GB18580 Indoor decorating and refurbishing materials - Limit of
formaldehyde emission of wood-based panels and finishing products
HG/T 2680-2009 Magnesium sulphate for industrial use
6.3 Appearance quality, size allowable deviation
It is performed according to the provisions of GB/T 9775.
6.4 Physical and chemical properties
6.4.1 Bending strength, apparent density
It is performed according to the provisions of JC 646
6.4.2 Impact-resistance strength
It is performed according to the provisions of GB/T 1043.1.
6.4.3 Moisture content of leaving factory
It is performed according to the provisions of GB/T 17657, and the drying
temperature is (65±3) °C.
6.4.4 Dry shrinkage and wet-swelling rate
It is performed according to the provisions of GB/T 7019, and the drying
temperature after soaking in wet-swelling rate test is (65±3) °C.
6.4.5 Gripping screw force
It is performed according to the provisions of Appendix C.
6.4.6 Chloride ion content
It is performed according to the provisions of Appendix A.
6.4.7 Leachable chloride ion content
It is performed according to the provisions of Appendix B.
6.4.8 Impermeability
Place the test-piece in a constant-temperature-humidity chamber with the
relative humidity of 90% or more and the temperature from 30 °C to 35 °C.
After 72 hours, take out the sample and observe whether there is water drop or
damp or not.
6.5 Incombustibility
It is performed according to the provisions of GB/T 5464.
6.6 Formaldehyde emission
7.3.1 For the tests of appearance quality and size allowable deviation,
randomly select three plates from the same inspection lot.
7.3.2 For the rest of inspection items, randomly select from the above products
whose appearance quality and size allowable deviation items are tested to be
qualified.
7.4 Decision rules
7.4.1 Appearance quality and size allowable deviation
According to the test results, if the appearance quality and size allowable
deviation of plates are in compliance with the corresponding provisions in 5.2.1
and 5.2.2, the batch is qualified; if there is one item which does not meet the
requirements of the standard in one piece of plate, extract twice from the same
batch to conduct the re-test of the project; if the indicator still does not meet the
requirements, then the product is determined to be unqualified.
7.4.2 Physical and chemical properties
According to the test results, if bending strength, apparent density,
impact-resistance strength, moisture content of leaving factory, dry shrinkage,
wet-swelling rate, gripping screw force, chloride ion content, leachable chloride
ion content, impermeability, incombustibility, formaldehyde emission, and
radionuclides limits of plates are in compliance with the corresponding
provisions in 5.2.3, 5.2.4, 5.2.5, and 5.2.6, respectively, the test item is
determined to be qualified; if there is one item which does not meet the
requirements of the standard in one piece of plate, extract twice from the same
batch to conduct the re-test of the project; if the indicator still does not meet the
requirements, then the product is determined to be unqualified..
7.4.3 Overall determination
7.4.3.1 Determination of factory inspection
According to the test results, if the factory inspection items are in compliance
with the corresponding provisions of this standard, the batch of products shall
be qualified; if one of the items fails to comply with the corresponding
provisions of this standard, the batch of products shall be determined to be
unqualified.
7.4.3.2 Determination of type test
According to the test results, if the type test items are in compliance with the
corresponding provisions of this standard, the batch of products shall be
qualified; if one of the items fails to comply with the corresponding provisions
of this standard, the batch of products shall be determined to be unqualified.
Appendix A
(Normative)
Determination of chloride ion content
A.1 Reagents
It is performed according to the provisions of 11.1.2.of GB/T 8077-2012
A.2 Instrument and equipment
A.2.1 Square hole sieve. one each with the bore diameter of 0.125mm and
0.25mm.
A.2.2 Balance. The division value is 0.0001g.
A.2.3 Measuring cylinder. 5mL, 100mL.
A.2.4 Beaker.200mL, 500mL.
A.2.5 Burette. 25mL.
A.2.6 Pipette. 10mL.
A.2.7 Potential meter.
A.2.8 Crusher.
A.3 Sample preparation
Weigh about 40g of test-piece after impact-resistance test; use crusher to grind;
use square hole sieve to sieve; after controlling to grind, the particle size range
of all samples is from 0.125mm to 0.25mm; collect the particles with the
particle size from 0.125 mm to 0.25 mm as the sample under test. The
samples are dried at 100°C~105°C until constant weight for spare-use.
A.4 Test steps
A.4.1 Weigh 0.5g of the sample after A.3 treatment, accurate to 0.0001g; place
it in a 200mL beaker; add 50mL of water and 4mL of nitric acid; stir it and heat
to boil for 5 min; use rapid qualitative filter paper to filter; use distilled water to
wash the residue until there is no chloride ion; collect about 200mL of filtrate.
A.4.2 It is performed according to the provisions of 11.1.4.2~11.1.4.4 of GB/T
8077-2012.
App......
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