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Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
CONCRETE BUILDING BLOCKS - PART 1: NORMAL DENSITY BLOCKS
Hardcopy , PDF
05-08-2011
English
01-01-1987
Important note : Users cannot be edited or removed once added to your Multi user PDF.
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
Applicable to solid or hollow concrete building blocks made with the materials specified in Clause 3.
| DevelopmentNote |
Supersedes I.S. 40. (09/2002)
|
| DocumentType |
Standard
|
| Pages |
46
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| I.S. 325-2:1995 | CODE OF PRACTICE FOR USE OF MASONRY - PART 2: MASONRY CONSTRUCTION |
| ISO 3534:1977 | Statistics — Vocabulary and symbols |
| BS 3718:1964 | Specification for laboratory humidity ovens (non-injection type) |
| BS 1881-6:1971 | Methods of testing concrete Analysis of hardened concrete |
| I.S. 325-1:1986 | CODE OF PRACTICE FOR USE OF MASONRY - PART 1: STRUCTURAL USE OF UNREINFORCED MASONRY |
| BS 5075-1:1982 | Concrete admixtures Specification for accelerating admixtures, retarding admixtures and water reducing admixtures |
| BS 4551:1980 | Methods of testing mortars, screeds and plasters |
| I.S. 1:1991 | PORTLAND CEMENT |
| I.S. 5:1974 | AGGREGATES FOR CONCRETE |
| BS 5628-3:1985 | Code of practice for use of masonry Materials and components, design and workmanship |
| BS 12:1978 | Specification for ordinary and rapid-hardening Portland cement |
| I.S. 24:1973 | TEST SIEVES |
| BS 3892-1:1982 | Pulverized-fuel ash Specification for pulverized-fuel ash for use as a cementitious component in structural concrete |
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