I.S. 20-1:1987
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
CONCRETE BUILDING BLOCKS - PART 1: NORMAL DENSITY BLOCKS
Hardcopy , PDF
08-05-2011
English
01-01-1987
Foreword
Declaration
SECTION 1 - INTRODUCTION
1.1 Scope
1.2 Definitions
SECTION 2 - MATERIALS
2.1 Cement
SECTION 3 - PHYSICAL PROPERTIES
3.1 Dimensions
3.2 External shell thickness of hollow blocks
3.3 Form
3.4 Surface texture and appearance
3.5 Blocks with special faces
3.6 Drying shrinkage
3.7 Density
3.8 Standard block strengths
SECTION 4 - SAMPLING
4.1 Sample sizes
4.2 Rate of sampling
SECTION 5 - STRENGTH ASSESSMENT
5.1 Manufacturer's strength assessment
5.2 Independent strength assessment
SECTION 6 - CERTIFICATES AND MARKING
6.1 Certificate of compliance
6.2 Marking
Appendix A Test method for checking the dimensional tolerances
of blocks
Appendix B Methods for the determination of nett block mass and
concrete density
Appendix C Method for the determination of drying shrinkage
Appendix D Method for the determination of strength
(softboard capping method)
Appendix E Method for the determination of strength
(mortar capping method)
Appendix F Reference standards
Notes to Users
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