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GB/T 14983-2026Refractory products - Determination of alkali resistance (English PDF)

耐火材料　抗碱性试验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 30, 2026

Implementation date

February 1, 2027

Scope

GB/T 14983-2026 is the English-translated version of 耐火材料　抗碱性试验方法.

GB/T 14983-2026 is the Chinese standard "Refractory products - Determination of alkali resistance". Its scope clause reads: This document describes the principle, equipment and materials, sample preparation, test procedure, and result evaluation/outcome of the alkali resistance test method for refractory materials.

Calculation and test reports. This document applies to the determination of the alkali resistance of refractory materials. Specifically, the alkali vapor method (Method 1) is applicable to the determination of the alkali resistance of shaped refractory products.

The molten alkali crucible method (Method 2) is suitable for determining the alkali resistance of shaped and unshaped refractories; the molten alkali immersion method (Method 3) is suitable for...

Used for determining the alkali resistance of shaped refractory products with strong alkali resistance (such as silon-bonded, silicon nitride-bonded silicon carbide refractory materials, etc.). Its clauses include terms and definitions; alkali vapor method (method 1).

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Document preview — GB/T 14983-2026

National Standard of the People's Republic of China

ICS: 81.080
Classification: Q 40
Replacing: GB/T 14983-2008

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

Foreword
1 Scope
2 Edition and transition
3 Classification and status
4 Structure of the document
5 The English edition

1 Scope

This document describes the principle, equipment and materials, sample preparation, test procedure, and result evaluation/outcome of the alkali resistance test method for refractory materials.

Calculation and test reports.

This document applies to the determination of the alkali resistance of refractory materials. Specifically, the alkali vapor method (Method 1) is applicable to the determination of the alkali resistance of shaped refractory products.

The molten alkali crucible method (Method 2) is suitable for determining the alkali resistance of shaped and unshaped refractories; the molten alkali immersion method (Method 3) is suitable for...

Used for determining the alkali resistance of shaped refractory products with strong alkali resistance (such as silon-bonded, silicon nitride-bonded silicon carbide refractory materials, etc.).

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 4513.2 Unshaped refractories - Part 2.Sampling

GB/T 4513.5 Unshaped refractories - Part 5.Specimen preparation and pretreatment

GB/T 5072 Test method for compressive strength of refractory materials at room temperature

GB/T 7321 Method for preparing test specimens of shaped refractory products

GB/T 8170 Rules for rounding off numerical values and the representation and determination of limiting values

GB/T 10325 Sampling Inspection Rules for Acceptance of Shaped Refractory Products

GB/T 18930 Terminology for Refractory Materials

3 Terms and Definitions

The terms and definitions defined in GB/T 18930 apply to this document.

4 Alkali vapor method (Method 1)

4.1 Principle

At 1100°C, anhydrous potassium carbonate (K2CO3) reacts with charcoal to produce alkaline vapor, which erodes the refractory material and generates new...

Alkali metal silicates and carbonates alter the appearance, structure, and properties of refractory materials.

4.2 Equipment and Materials

4.2.1 Test Furnace

Horizontal alkali resistance test heating furnace (see Figure 1), with a maximum heating temperature of 1300°C and a furnace diameter of not less than 110mm.

The length of the constant temperature zone during the heating period shall not be less than 120mm, and the temperature difference inside the furnace shall not exceed ±10°C.

4.2.2 Temperature measurement and control device

Thermocouples with protective sheaths shall be used for temperature measurement and shall meet the requirements of GB/T 16839.1.

The temperature control system should be able to heat up according to the specified program.

4.2.3 Graphite crucible

inner diameter 70mm, wall thickness 5mm, inner height 100mm. The crucible lid is connected to the crucible by coarse thread.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Cited by

GB/T 23293-2021Nitride bonded refractory products and their related mortars

Editions of GB/T 14983

Edition	Title	Revision	Status
GB/T 14983-2026	Refractory products - Determination of alkali resistance	current edition	Current
GB/T 14983-2008	Refractory products - Determination of alkali resistance	previous edition	In force until 1 February 2027

This page sells the current edition, GB/T 14983-2026. Earlier editions are listed for reference only.

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