GB/T 17431.1-2010Lightweight aggregates and its test methods -- Part 1: Lightweight aggregates (English PDF)

Foreword

GB/T 17431 Lightweight Aggregates and Its Test Methods consists of the following two parts.

--- Part 1.Lightweight Aggregates;

--- Part 2.Test Methods for Lightweight Aggregates.

This Part is Part 1 of GB/T 17431; and its degree of consistency with EN 13055.1.2002

Lightweight Aggregates - Part 1.Lightweight Aggregates for Concrete, Mortar and Grout is

not equivalent.

This Part replaced GB/T 17431.1-1998 Lightweight Aggregates and Its Test Methods – Part 1.

Lightweight Aggregates.

Compared with GB/T 17431.1-1998, the major changes of this Document are as follows.

--- Revise Terms and Definitions (Clause 3 of the 1998 Edition; Clause 3 of this Edition);

--- Revise the upper limit of the density grade of lightweight coarse aggregates to 1200

kg/m³ (3.1 of the 1998 Edition; 3.1 of this edition);

--- Revised the classification of lightweight aggregates (Clause 4 of the 1998 Edition; Clause

4 of this Edition);

--- Change the sieve used for sieve analysis has to a square-hole sieve; and revise the particle

size distribution table (5.1.2 of the 1998 Edition; 5.1.2 of this Edition);

--- Add particle size distribution with a nominal size of 5 mm to 25 mm (5.1.2 of the 1998

Edition; 5.1.2 of this Edition);

--- Add technical indicators for the gradation of mixed lightweight coarse and fine

aggregates (5.1.3 of this Edition);

--- Cancel the homogeneity index (5.2 of the 1998 Edition);

--- Cancel the product grades (4.2, 5.3.1, 5.3.2, and 5.5.1 of the 1998 Edition; Clause 4, 5.3.1,

and 5.5.1 of this Edition);

--- Revise the specifications for particle shape coefficient (5.5.1 of the 1998 Edition; 5.5.1

of this Edition);

--- Add technical requirements for chloride content in lightweight aggregates (5.6 of this

Edition);

--- Revise technical requirements for mud content (5.6 of the 1998 Edition; 5.6 of this

Edition).

Lightweight Aggregates and Its Test Methods – Part 1.

Lightweight Aggregates

1 Scope

This Part of GB/T 17431 specifies the terms and definitions, classification, requirements, test

methods, inspection rules, product certificates, stockpiling and transportation of lightweight

aggregates.

This Part applies to lightweight aggregates used in concrete, primarily including artificial

lightweight aggregates, natural lightweight aggregates, and industrial waste slag lightweight

aggregates. It may also be used as a reference for lightweight aggregates of other categories or

intended for other applications.

2 Normative References

The provisions in following documents become the provisions of this Part through reference in

this Part of GB/T 17431.For dated references, the subsequent amendments (excluding

corrigendum) or revisions do not apply to this Standard, however, parties who reach an

agreement based on this Standard are encouraged to study if the latest versions of these

documents are applicable. For undated references, the latest edition of the referenced document

applies.

GB 6566 Limits of radionuclides in building materials

GB/T 14684-2001 Sand for building

GB/T 17431.2-2010 Lightweight aggregates and its test methods - Part 2.Test methods for

lightweight aggregates

JGJ 51 Technical specification for lightweight aggregate concrete

3 Terms and Definitions

For the purposes of this Part of GB/T 17431, the following terms and definitions apply.

4 Classification

It is classified as follows by method of formation.

a) Artificial lightweight aggregate. lightweight coarse aggregate (e.g., ceramisite) and

lightweight fine aggregate (e.g., ceramisite sand);