GB/T 29423-2026Chemically activated concrete for corrosion-resistant cement products (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

This document supersedes GB/T 29423-2012 "Alkali-Slag-Fly Ash Concrete for Corrosion-Resistant Cement Products" and is consistent with GB/T 29423- Compared to 2012, aside from structural adjustments and editorial changes, the main technical changes are as follows.

a) Regulations regarding strength grades and markings have been added (see 4.2, 4.3);

b) Added general provisions (see Chapter 5);

c) The requirement for "chemically activated cementitious materials and components" has been added (see 5.1.1);

d) Added "Preparation" (see 5.2) and "Other Provisions" (see 5.3);

e) The workability of concrete and the technical requirements have been revised (see 6.1.1, 2012 version of 6.1.1);

f) The technical requirements for "water-soluble chloride ion content" have been revised (see 6.1.3, 2012 version of 6.1.3);

g) The technical requirements for "chemical corrosion resistance" have been changed (see 6.2.2, 2012 version of 6.2.2);

h) Increased requirements for expansion rate, water absorption rate, chloride ion penetration resistance, and freeze resistance (see Table 2);

i) The requirements for "test conditions" (see 7.1), "instruments and equipment" (see 7.2), and "samples" (see 7.3) have been added to the test methods;

j) The test method for "condensation time" has been modified (see 7.5, 7.2 in the 2012 edition);

l) The test method for "chemical corrosion resistance" has been changed (see 7.8, 7.5 in the 2012 edition);

m) Added the "expansion rate" test method (see 7.9), the "water absorption rate" test method (see 7.10), and the "chlorine ion permeability resistance" test method. (See 7.11) Test method for "frost resistance" (see 7.12).

1 Scope

This document specifies the classification, strength grades and markings, general provisions, and technical requirements for chemically activated concrete used in corrosion-resistant cement products. Requirements, test methods, inspection rules, and storage and transportation.

This document applies to chemically activated concrete used in the production of cement products resistant to acid, alkali, and salt corrosion in chemically corrosive environments.

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 to this document.

GB/T 209 Industrial Sodium Hydroxide

GB/T 210 Industrial Sodium Carbonate

GB/T 1346 Test Methods for Standard Consistency Water Requirement, Setting Time and Soundness of Cement

GB/T 1596 Fly ash used in cement and concrete

GB/T 2419 Determination of Flowability of Cement Mortar

GB/T 4209 Industrial Sodium Silicate

GB/T 5483 Natural Gypsum

GB/T 8076 Concrete Admixtures

GB/T 9142 Construction Machinery and Equipment - Concrete Mixers

GB/T 14684 Construction Sand

GB/T 14685 Construction pebbles and crushed stone

GB/T 17671 Test method for strength of cement mortar (ISO method)

GB/T 18046 Granulated blast furnace slag powder for use in cement, mortar and concrete

GB/T 18736 Mineral Admixtures for High-Strength and High-Performance Concrete

GB/T 20491 Steel slag powder for use in cement and concrete

GB/T 21371 Industrial by-product gypsum used in cement

GB/T 26751 Granulated electric furnace slag powder for use in cement and concrete

GB/T 27690 Silica fume for mortars and concrete

GB/T 50080 Standard for Test Methods of Performance of Ordinary Concrete Mixtures

GB/T 50081 Standard for Test Methods of Physical and Mechanical Properties of Concrete

GB/T 50082 Standard for Test Methods of Long-Term Performance and Durability of Concrete

GB/T 50107 Standard for Testing and Evaluation of Concrete Strength

GB 50164 Standard for Quality Control of Concrete

JC/T 313 Test Method for Expansion Rate of Expansive Cement

JC/T 681 Planetary Cement Mortar Mixer

JC/T 682 Cement Mortar Specimen Molding Vibration Table