PDF GB/T 5483-2024 English (GB/T 5483-2008: Older version)
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GB/T 5483-2024: PDF in English (GBT 5483-2024) GB/T 5483-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.100.10
CCS Q 62
Replacing GB/T 5483-2008
Natural Gypsum
天然石膏
ISSUED ON. NOVEMBER 28, 2024
IMPLEMENTED ON. JUNE 1, 2025
Issued by. State Administration for Market Regulation;
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 Labeling... 6
5 Requirements... 7
6 Test Methods... 9
7 Inspection Rules... 11
8 Marking, Packaging, Transportation and Storage... 12
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This document serves as a replacement for GB/T 5483-2008 Natural Gypsum. In comparison
with GB/T 5483-2008, apart from structural adjustments and editorial modifications, the main
technical changes are as follows.
a) The terms and definitions “natural gypsum”, “natural anhydrite” and “natural mixed
gypsum” are modified (see 3.1, 3.3 and 3.4; 3.4, 3.5 and 3.6 of Version 2008);
b) The term and definition of “natural gypsum dihydrate” is added (see 3.2);
c) The classification and labeling of natural gypsum products are added (see Chapter 4);
d) The requirements for natural gypsum for building materials, natural gypsum for
molds, natural gypsum for agriculture, natural gypsum for medicine and food, and
natural gypsum for other purposes are added (see Chapter 5);
e) The test method for grade is modified (see 6.1; 6.2 of Version 2008);
f) The test methods for pH value, ferric oxide, acid-insoluble matter, water-soluble
fluoride ion, fluoride ion, lead, arsenic, mercury, cadmium, chromium, thallium and
selenium are added (see Chapter 6);
g) The “Inspection Rules” is modified (see Chapter 7; Chapter 7 of Version 2008).
Please be noted that certain content of this document may involve patents. The institution
issuing this document does not undertake the responsibility of identifying these patents.
This document was proposed by China Building Materials Federation.
This document shall be under the jurisdiction of National Technical Committee 406 on Non-
metallic Mineral Products of Standardization Administration of China (SAC/TC 406).
The drafting organizations of this document. Xianyang Nonmetallic Mineral Research and
Design Institute Co., Ltd.; Anhui Hengtai New Material Technology Co., Ltd.; Beijing New
Building Material Group Co., Ltd.; Shanghai Fengzhu New Materials Technology Co., Ltd.;
Luchang Taishan Gypsum Building Materials Co., Ltd.; MACO Group Co., Ltd.; Huangmei
Longyuan Gypsum Co., Ltd.; Zhejiang Hangkun Construction Group Co., Ltd.; Ningxia UP
Security Technology Consulting Co., Ltd.; Hubei Juhai Environment Technology Co., Ltd.;
Henan Building Materials Research and Design Institute Co., Ltd.
The main drafters of this document. Zheng Changwen, Li Xiangfei, Ren Li, Qi Hongfei, Shu
Shuiwang, Cao Yin, Guo Baitang, Fang Xinjun, Niu Xiaoyu, Liu Zhihao, Liu Yongchuan,
Natural Gypsum
1 Scope
This document specifies the classification and labeling, requirements, test methods, inspection
rules, marking, packaging, transportation and storage of natural gypsum.
This document applies to the production, use and sale of natural gypsum products.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 2007.2 General Rules for the Sampling and Sample Preparation of Minerals in Bulk -
Manual Method of Sample Preparation
GB 5009.75 National Food Safety Standard - Determination of Lead in Food Additives
GB 5009.76 National Food Safety Standard - Determination of Arsenic in Food Additives
GB 5009.93 National Food Safety Standard - Determination of Selenium in Food
GB/T 5484 Methods for Chemical Analysis of Gypsum
GB/T 23349 Determination of Arsenic, Cadmium, Chromium, Lead and Mercury Contents for
Fertilizers
GB 38400 Limitation Requirements of Toxic and Harmful Substance in Fertilizers
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 natural gypsum
Minerals and their processed products that exist mainly in the form of calcium sulfate dihydrate
(CaSO4 2H2O) and anhydrous calcium sulfate (CaSO4).
3.2 natural gypsum dihydrate
Natural gypsum mainly exists in the form of calcium sulfate dihydrate (CaSO4 2H2O).
3.3 natural anhydrite
Natural gypsum that exists mainly in the form of anhydrous calcium sulfate (CaSO4), and the
ratio of the mass fraction of anhydrous calcium sulfate (CaSO4) to the sum of the mass fractions
of dihydrate calcium sulfate (CaSO4 2H2O) and anhydrous calcium sulfate (CaSO4) is not less
than 80%.
3.4 natural mixed gypsum
Natural gypsum that exists mainly in the form of calcium sulfate dihydrate (CaSO4 2H2O) and
anhydrous calcium sulfate (CaSO4), and the ratio of the mass fraction of anhydrous calcium
sulfate (CaSO4) to the sum of the mass fractions of calcium sulfate dihydrate (CaSO4 2H2O)
and anhydrous calcium sulfate (CaSO4) is less than 80%.
3.5 grade
The content of useful components or useful minerals in unit volume or unit mass of ore.
3.6 free water
The moisture in the air adsorbed by a substance.
3.7 crystal water
In crystalline substances, a certain number of water molecules are bound to ions or molecules
by chemical bonding force.
4 Classification and Labeling
4.1 Classification
Natural gypsum products are divided into natural gypsum mineral products and natural gypsum
mineral processed products. Natural gypsum mineral products are divided into three categories
in accordance with their main chemical components. natural gypsum dihydrate, natural
anhydrite and natural mixed gypsum, which are respectively coded as G, A, and M. Each
category is divided into five specifications in accordance with their grade. special grade, first
grade, second grade, third grade and fourth grade, which are respectively coded as KT, K1, K2,
K3 and K4.Natural gypsum mineral processed products are divided into five categories in
accordance with their purposes. natural gypsum for building materials, natural gypsum for
molds, natural gypsum for agriculture, natural gypsum for medicine and food, and natural
gypsum for other purposes, which are respectively coded as JC, MJ, NY, YS and QT. The
classification of natural gypsum products is shown in Table 1.
5.In any of the following situations, type inspection shall be carried out.
a) When a new product is put into production or when a product is finalized and
identified;
b) During normal production, it shall be carried out once a year;
c) When there are relatively significant changes in raw materials, production processes,
equipment, etc. that may affect product quality;
d) When production is resumed after being suspended for more than three months;
e) When there is a significant difference between the exit-factory inspection results and
the previous type inspection results.
7.4 Determination Rules
When all items of each category of product meet the requirements of Chapter 5, the batch of
products is determined to be qualified. When one or more items are disqualified, sampling shall
be carried out at twice the original sampling volume, and the disqualified items shall be re-
inspected. If the re-inspection results meet the requirements of Chapter 5, the batch of products
will still be determined to be qualified; if the re-inspection results do not meet the requirements
of Chapter 5, then, the batch of products will be determined to be disqualified.
8 Marking, Packaging, Transportation and Storage
8.1 Marking
Each package shall have the product name, serial No. of implemented Standard, net content,
manufacturer name, address, and production date.
8.2 Packaging
8.2.1 Natural gypsum products are packaged in plastic woven bags or kraft paper bags lined
with plastic film. The packaging shall be firm and neat.
8.2.2 The accompanying documents for bulk natural gypsum products shall include a product
certificate.
8.3 Transportation and Storage
During transportation and storage, the products shall be protected from rain, moisture and
damage, and shall not be mixed or transported with pesticides, fertilizers and chemicals, etc.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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