1 Scope
This standard specifies product classification, technical requirements, testing methods, inspection rules as well as marking, packing, transport and storage of fired hollow bricks and blocks.
This standard is applicable to such hollow bricks and blocks (hereinafter referred to as bricks and blocks) as baked from clay, shale, coal gangue and fly ash (main raw materials) and mostly used for the non-bearing parts of buildings.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent correction to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this standard.
GB/T 2542 "Test Methods for Wall Bricks"
GB 6566 "Limit of Radio-nuclides in Building Materials"
GB/T 18968-2003 "Terms of Wall Materials"
JC/T 466 "Inspection Rules for Wall Brick"
3 Terms and Definitions
Terms and definitions in GB/T 18968-2003 and JC/T 466 are adopted by this standard.
4 Classification
4.1 Classification
It may be divided into clay brick and block (N), shale brick and block (Y), coal gangue brick and block (M) and fly ash brick and block (F) according to the major raw materials.
4.2 Specifications
4.2.1 The brick and block shape are right-angle hexahedron (See Figure 1) and its length, width and height size shall meet the following requirements: (unit: mm)
390, 290.240, 190, 180(175), 140, 115, 90;
4.2.2 The other sizes may be negotiated by both parties of supplier and demander.
Contents
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification
4.1 Classification
4.2 Specifications
4.3 Grade
4.4 Product Marking
5 Requirements
5.1 Size Deviation
5.2 Appearance Quality
5.3 Strength Grade
5.4 Density Grade
5.5 Hole Arrangement and Structure
5.6 Scumming
5.7 Lime Bursting
5.8 Water Absorption
5.9 Weather Resistance Performance
5.10 Unburnt Brick and Crisp Brick
5.11 Radioactive Substance
6 Testing Method
6.1 Size Deviation
6.2 Appearance Quality
6.3 Strength
6.4 Density, Scumming and Lime Bursting
6.5 Hole Arrangement and Structure
6.6 Water Absorption and Saturation Coefficient
6.7 Freezing and Thawing Test
6.8 Radioactive Substance
7 Inspection Rules
7.1 Inspection Classification
7.2 Lot Size
7.3 Sampling
7.4 Determination Rules
8 Marking, Packaging, Transport and Storage
8.1 Marking
8.2 Packing
8.3 Transport
8.4 Storage
Appendix A (Normative) Weathering Zone Division
