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GB/T 5762-2024Methods for chemical analysis of limestone, quicklime and hydrated lime for building materials industry (English PDF)

建材用石灰石、生石灰和熟石灰化学分析方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

April 25, 2024

Implementation date

November 1, 2024

Scope

GB/T 5762-2024 is the English-translated version of 建材用石灰石、生石灰和熟石灰化学分析方法.

GB/T 5762-2024 is the Chinese national standard that fixes how limestone, quicklime and hydrated lime for the building materials industry are analysed chemically. It sets out, clause by clause, a reference method and one or more substitute methods for each determination: loss on ignition, silicon dioxide, ferric oxide, aluminium oxide, calcium oxide, magnesium oxide, titanium dioxide, potassium and sodium oxide, total sulfur, chloride ion, manganese monoxide, phosphorus pentoxide, carbon dioxide, the quicklime A (CaO + MgO) content, effective calcium, the calcium carbonate titration value of limestone and free silicon dioxide, together with the reagents, the apparatus, the preparation of the sample and the allowable difference between duplicate determinations. Each determination is carried out twice, and the mean is taken as the result only when the two values fall inside the allowable difference for the same laboratory. This third revision brings the instrumental methods into the standard: infrared analysis and coulometric titration for total sulfur, ion chromatography for chloride, inductively coupled plasma optical emission spectrometry for eight oxides and X-ray fluorescence for eleven determinations, and it adds the determination of water-soluble chromium (VI). It replaces GB/T 5762-2012 and has been in force since 1 November 2024.

Document preview — GB/T 5762-2024

National Standard of the People's Republic of China

ICS: 91.100.10
Classification: Q 11
Replacing: GB/T 5762-2012

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope1
2 Normative references1
3 Terms and definitions1
4 Basic requirements for the test1
5 Reagents and materials2
6 Instruments and equipment11
7 Preparation of samples13
8 Determination of loss on ignition — Ignition difference subtraction method13
9 Determination of silicon dioxide — Ammonium chloride gravimetric method (standard method)14
10 Determination of ferric oxide — o-Phenanthroline spectrophotometry (standard method)14
11 Determination of aluminium oxide — EDTA direct titration of the iron and aluminium content (standard method)15
12 Determination of calcium oxide — EDTA titration method (standard method)15
13 Determination of magnesium oxide — Atomic absorption spectrophotometry (standard method)15
14 Determination of titanium dioxide — Diantipyrylmethane spectrophotometry (standard method)16
15 Determination of potassium oxide and sodium oxide — Flame photometry (standard method)16
16 Determination of total sulfur — Barium sulfate gravimetric method (standard method)16
17 Determination of chloride ion — Ammonium thiocyanate volumetric method (standard method)16
18 Determination of manganese monoxide — Potassium periodate oxidation spectrophotometry (standard method)17
19 Determination of phosphorus pentoxide — Phosphomolybdenum blue spectrophotometry (standard method)17
20 Determination of carbon dioxide — Alkali asbestos absorption gravimetric method17
21 Determination of the quicklime A (CaO + MgO) content — Hydrochloric acid titration method17
22 Determination of effective calcium — Sucrose calcium-hydrochloric acid titration method17
23 Determination of the calcium carbonate titration value in limestone — Hydrochloric acid back titration method18
24 Determination of free silicon dioxide19
25 Determination of silicon dioxide — Potassium fluorosilicate volumetric method (substitute method)19
26 Determination of ferric oxide — EDTA direct titration method (substitute method)20
27 Determination of ferric oxide — Atomic absorption spectrophotometry (substitute method)21
28 Determination of aluminium oxide — Direct titration method (substitute method)21
29 Determination of aluminium oxide — Copper sulfate back titration method (substitute method)21
30 Determination of calcium oxide — Sodium hydroxide fusion-EDTA titration method (substitute method)22
31 Determination of magnesium oxide — EDTA titration subtraction method (substitute method)23
32 Determination of potassium oxide and sodium oxide — Atomic absorption spectrophotometry (substitute method)23
33 Determination of total sulfur — Coulometric titration (substitute method)23
34 Determination of total sulfur — Infrared analysis method (substitute method)24
35 Determination of chloride ion — Ion chromatography (substitute method)25
36 Determination of chloride ion — (Automatic) potentiometric titration (substitute method)25
37 Determination of manganese monoxide — Atomic absorption spectrophotometry (substitute method)25
38 Determination of ferric oxide, aluminium oxide, magnesium oxide, titanium dioxide, potassium oxide, sodium oxide, manganese monoxide and phosphorus pentoxide — Inductively coupled plasma optical emission spectrometry (substitute method)25
39 Determination of silicon dioxide, ferric oxide, aluminium oxide, calcium oxide, magnesium oxide, titanium dioxide, potassium oxide, sodium oxide, manganese monoxide, phosphorus pentoxide and chloride ion — X-ray fluorescence analysis method (substitute method)25
40 Determination of water-soluble chromium (VI)25
41 Allowable difference25

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020 “Directives for standardization — Part 1: Rules for the structure and drafting of standardizing documents”.

This document replaces GB/T 5762-2012 “Methods for chemical analysis of limestone, quicklime and hydrated lime for building materials”. Compared with GB/T 5762-2012, apart from structural adjustments and editorial changes, the main technical changes are as follows:

a) changed the method for the determination of free silicon dioxide (see Clause 24; Clause 24 of the 2012 edition);

b) deleted the determination of chloride ion — phosphoric acid distillation-mercury salt titration method (substitute method) (Clause 34 of the 2012 edition);

c) deleted the determination of carbon dioxide — automatic photoelectric titration method (substitute method) (Clause 37 of the 2012 edition);

d) added the determination of total sulfur — infrared analysis method (substitute method) (see Clause 34);

e) added the determination of chloride ion — ion chromatography (substitute method) (see Clause 35);

f) changed the determination of chloride ion — (automatic) potentiometric titration (substitute method) to “the analysis method shall be carried out in accordance with GB/T 176” (see Clause 36; Clause 35 of the 2012 edition);

g) added the determination of ferric oxide, aluminium oxide, magnesium oxide, titanium dioxide, potassium oxide, sodium oxide, manganese monoxide and phosphorus pentoxide by inductively coupled plasma optical emission spectrometry (substitute method) (see Clause 38);

h) added the determination of silicon dioxide, ferric oxide, aluminium oxide, calcium oxide, magnesium oxide, titanium dioxide, potassium oxide, sodium oxide, manganese monoxide, phosphorus pentoxide and chloride ion by X-ray fluorescence analysis (substitute method) (see Clause 39);

i) added the determination of water-soluble chromium (VI) (see Clause 40).

Attention is drawn to the possibility that some of the content of this document may be the subject of patent rights. The issuing body of this document bears no responsibility for identifying such patent rights.

This document was proposed by the China Building Materials Federation.

This document is under the jurisdiction of the National Technical Committee on Cement of Standardization Administration of China (SAC/TC 184).

This document was first issued in 1986, revised for the first time in 2000, revised for the second time in 2012; this is the third revision.

1 Scope

This document describes the reference methods and the substitute methods for the chemical analysis of limestone, quicklime and hydrated lime.

This document applies to the chemical analysis of limestone, quicklime and hydrated lime for the building materials industry.

2 Normative references

The contents of the following documents constitute indispensable provisions of this document through normative reference in the text. For dated references, only the edition corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 176 Methods for chemical analysis of cement · GB/T 2007.1 General rules for the sampling and sample preparation of bulk mineral products — Manual sampling method · GB/T 6682 Water for analytical laboratory use — Specification and test methods · GB/T 8170 Rules of rounding off for numerical values and expression and judgement of limiting values · GB/T 28629 Method for chemical analysis of free silicon dioxide in cement clinker · GB 31893 Limit and determination method of water-soluble chromium (VI) in cement · JJG 196 Working glass containers

Remaining clauses in the full document

3 Terms and definitions
4 Basic requirements for the test
5 Reagents and materials
6 Instruments and equipment
7 Preparation of samples
8 Determination of loss on ignition — Ignition difference subtraction method
9 Determination of silicon dioxide — Ammonium chloride gravimetric method (standard method)
10 Determination of ferric oxide — o-Phenanthroline spectrophotometry (standard method)
11 Determination of aluminium oxide — EDTA direct titration of the iron and aluminium content (standard method)
12 Determination of calcium oxide — EDTA titration method (standard method)
13 Determination of magnesium oxide — Atomic absorption spectrophotometry (standard method)
14 Determination of titanium dioxide — Diantipyrylmethane spectrophotometry (standard method)
15 Determination of potassium oxide and sodium oxide — Flame photometry (standard method)
16 Determination of total sulfur — Barium sulfate gravimetric method (standard method)
17 Determination of chloride ion — Ammonium thiocyanate volumetric method (standard method)
18 Determination of manganese monoxide — Potassium periodate oxidation spectrophotometry (standard method)
19 Determination of phosphorus pentoxide — Phosphomolybdenum blue spectrophotometry (standard method)
20 Determination of carbon dioxide — Alkali asbestos absorption gravimetric method
21 Determination of the quicklime A (CaO + MgO) content — Hydrochloric acid titration method
22 Determination of effective calcium — Sucrose calcium-hydrochloric acid titration method
23 Determination of the calcium carbonate titration value in limestone — Hydrochloric acid back titration method
24 Determination of free silicon dioxide
25 Determination of silicon dioxide — Potassium fluorosilicate volumetric method (substitute method)
26 Determination of ferric oxide — EDTA direct titration method (substitute method)
27 Determination of ferric oxide — Atomic absorption spectrophotometry (substitute method)
28 Determination of aluminium oxide — Direct titration method (substitute method)
29 Determination of aluminium oxide — Copper sulfate back titration method (substitute method)
30 Determination of calcium oxide — Sodium hydroxide fusion-EDTA titration method (substitute method)
31 Determination of magnesium oxide — EDTA titration subtraction method (substitute method)
32 Determination of potassium oxide and sodium oxide — Atomic absorption spectrophotometry (substitute method)
33 Determination of total sulfur — Coulometric titration (substitute method)
34 Determination of total sulfur — Infrared analysis method (substitute method)
35 Determination of chloride ion — Ion chromatography (substitute method)
36 Determination of chloride ion — (Automatic) potentiometric titration (substitute method)
37 Determination of manganese monoxide — Atomic absorption spectrophotometry (substitute method)
38 Determination of ferric oxide, aluminium oxide, magnesium oxide, titanium dioxide, potassium oxide, sodium oxide, manganese monoxide and phosphorus pentoxide — Inductively coupled plasma optical emission spectrometry (substitute method)
39 Determination of silicon dioxide, ferric oxide, aluminium oxide, calcium oxide, magnesium oxide, titanium dioxide, potassium oxide, sodium oxide, manganese monoxide, phosphorus pentoxide and chloride ion — X-ray fluorescence analysis method (substitute method)
40 Determination of water-soluble chromium (VI)
41 Allowable difference

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 31 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 2007.1 · JJG 196

Cited by

Similar standards

GB/T 176|GB/T 28629|GB 31893|GB/T 2007.1

Editions of GB/T 5762

Edition	Title	Revision	Status
GB/T 5762-2024	Methods for chemical analysis of limestone, quicklime and hydrated lime for building materials industry	third revision	Current
GB/T 5762-2012	Methods for chemical analysis of limestone, quicklime and hydrated lime for building materials industry	second revision	Superseded
GB/T 5762-2000	Methods for chemical analysis of limestone for building material industry	first revision	Superseded
GB/T 5762-1986	Methods of chemical analysis of limestone for building material industry	first issue	Superseded

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