1 Scope
This standard specifies the terms and definitions, classification, general requirements, technical requirements, test methods, inspection rules, product qualification certificate, stacking and transportation of nonload bearing concrete hollow brick.
This standard is applicable to concrete hollow bricks used in nonload bearing structures like industrial and civil buildings.
2 Normative References
The following documents contain provisions which, through referenced in this text, constitute provisions of this standard. For dated reference, subsequent amendments (excluding the corrected contents) or any revisions of these publications do not apply. However, all parties coming to an agreement based on this standard are encouraged to study whether the latest edition of these documents applies. For undated references, the latest editions apply.
GB 175 Common Portland Cement
GB/T 1346 Test Methods for Water Requirement of Normal Consistency, Setting Time and Soundness of the Portland Cement
GB/T 1596 Fly Ash Used for Cement and Concrete
GB/T 2542 Test Methods for Wall Bricks
GB/T 4111 Test Methods for the Small Concrete Hollow Block
GB 6566 Limits of Radionuclides in Building Materials
GB 8076 Concrete Admixtures
GB/T 8170 Rules of Rounding off for Numerical Values & Expression and Judgement of Limiting Values
GB/T 14684 Sand for Construction
GB/T 14685 Pebble and Crushed Stone for Construction
GB/T 17431.1 Lightweight Aggregates and Its Test Methods - Part 1: Lightweight Aggregates
GB/T 17669.3 Gypsum Plasters-Determination of Mechanical Properties
GB/T 17671 Method of Testing Cements-Determination of Strength
GB/T 18046 Ground Granulated Blast Furnace Slag used for Cement and Concrete
GB/T 18968 Terms of Wall Materials
JGJ 63 Standard of Water for Concrete
YBJ 20584 Technical Specification for Crushed Air-cooled Blast Furnace Slag for Concrete
3 Terms and Definitions
The terms and definitions specified in GB/T 18968 and those listed below are applicable to this standard.
3.1
Nonload bearing concrete hollow brick
Brick applied in regions of nonload bearing structure, using cement and aggregate as main material blending with admixture and other materials, the hollow ratio of which through dosing, stirring, molding, curing is not less than 25% (hereinafter referred to as hollow brick), the code is NHB.
See Figure 1 for the name of each part of hollow brick.
1 - side face;
2 - bedding face (face with small thickness of outer wall and rib);
3 - top face (face with large thickness of outer wall and rib);
4 - top surface;
5 - length (L);
6 - breadth (B);
7 - height (H);
8 - outer wall;
9 - rib.
Figure 1 Name of Each Part of Hollow Brick
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification
5 General Requirements
6 Technical Requirements
7 Test Methods
8 Inspection Rules
9 Product Certificate, Stacking and Transportation
Appendix A (Normative) Compressive Strength Test Method
Appendix B (Normative) Carbonization Coefficient Test Method
Appendix C (Normative) Softening Coefficient Test Method
