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GB/T 47077-2026Test method for the available alkali content of mineral admixtures (English PDF)

矿物掺合料有效碱含量试验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

January 28, 2026

Implementation date

August 1, 2026

Scope

GB/T 47077-2026 is the English-translated version of 矿物掺合料有效碱含量试验方法.

GB/T 47077-2026 is the Chinese standard "Test method for the available alkali content of mineral admixtures". Its scope clause reads: This document describes the principle, test conditions, reagents and materials, instruments and equipment, sample preparation, and test procedures for the effective alkali content test of mineral admixtures.

Test procedures, test data processing, and test reports. This document applies to the determination of the effective alkali content that can be dissolved in mineral admixtures in cement-based materials. Its clauses include terms and definitions.

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Document preview — GB/T 47077-2026

National Standard of the People's Republic of China

ICS: 91.100.30
Classification: Q 13

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

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Principle
5.Test conditions
6.Reagents and Materials
7.Instruments and Equipment
8.Sample Preparation
9.Experimental Steps
10.Experimental Data Processing
11 Test Report

1 Scope

This document describes the principle, test conditions, reagents and materials, instruments and equipment, sample preparation, and test procedures for the effective alkali content test of mineral admixtures.

Test procedures, test data processing, and test reports.

This document applies to the determination of the effective alkali content that can be dissolved in mineral admixtures in cement-based materials.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 622-2006 Chemical Reagents - Hydrochloric Acid

GB/T 679-2002 Chemical Reagents - Ethanol (95%)

GB 1253 Working Standard Reagent Sodium Chloride

GB/T 1914 Chemical Analysis Filter Paper

GB/T 6003.1 Technical requirements and inspection of test sieves - Part 1.Metal wire woven mesh test sieves

GB/T 6682-2008 Specifications and test methods for water used in analytical laboratories

GB 8076 Concrete Admixtures

GB 10736 Working Standard Reagent Potassium Chloride

GB/T 12806-2011 Laboratory Glassware - Single-mark volumetric flasks

GB/T 12808-2015 Laboratory Glassware - Single-mark Pipettes

GB/T 15724 Laboratory Glassware Beakers

HG/T 4101 Chemical Reagent Phenolphthalein

JB/T 10058 Technical Conditions for Flame Photometers

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 mineral admixture

A powder with one or more oxides such as silicon, aluminum, and calcium as its main components, possessing a certain fineness, which can be added to concrete to adjust its properties.

Coal ash, granulated blast furnace slag powder, silica fume, steel slag powder, granulated electric furnace phosphorus slag powder, copper slag powder, and natural pozzolanic materials.

3.2

The total amount of potassium and sodium ions in the liquid phase in a cement-based cementitious material system in a free state.

Note. Values are expressed as calculated based on Na2O = 0.658K2O.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 10 pages — is available in the English PDF.

Referenced standards

Normative references

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