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BS DD76-2(1983) : 1983

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

PRECAST CONCRETE PIPES OF COMPOSITE CONSTRUCTION - PRECAST CONCRETE PIPES STRENGTHENED BY CHOPPED ZINC-COATED STEEL FIBRES
Available format(s)

Hardcopy , PDF

Superseded date

11-18-2002

Language(s)

English

Published date

01-01-1983

Foreword
Committees responsible
Draft for Development
Section one. Specification
1. Scope
2. Definitions
3. Cement
4. Aggregates
5. Other concrete materials
6. Concrete
7. Chopped steel fibre
8. Nominal size (DN)
9. Manufacturing diameter and actual diameter
10. Permissible variation in the thickness of wall
11. Squareness of ends
12. Permissible deviation from straightness
13. Permissible irregularity of internal surface
14. Joints
15. Marking of units
16. Effective lengths of pipes
17. Crushing test loads for pipes
18. Bends
19. Junctions
Section two. Tests
20. Assessment and acceptance of units
21. Test requirements and recommendations
22. Type of inspection and batch size
23. Inspection procedures for units
Appendices
A. Information to be given in connection with an
     enquiry and order
B. Method for measuring fibre content of mixes
C. Method of measurement of deviation from straightness
D. Tests for fibre distribution and water absorption
E. Hydrostatic test
F. Crushing strength test for pipes
G. Tests of pipe joints for angular deflection,
     straight draw and shear
H. Method of measurement of surface irregularity
Tables
1. Nominal sizes and permissible tolerances for units
2. Crushing test loads
3. Minimum effective lengths and permissible angles
     for bends
4. Right-angled junctions
5. Oblique-angled junctions
6. Summary of test requirements and inspection
     procedures
7. Minimum angular deflection and straight draw for
     joints
8. Maximum number of individual defectives in last 10
     batches permitted for switching to reduced
     inspection (hydrostatic or works proof load crushing
     test)
9. Inspection plans for hydrostatic and works proof
     load crushing tests
Figures
1. Effective length of units
2. Typical flexible joints for pipes
3. Typical bends
4. Typical junctions
5. Nominal zones where crack widths are permitted
     during maximum load test
6. Joint test measurements
7. Gauge for measuring deviation from straightness
8. Testing arrangement for the crushing test
9. Dimensions of feeler gauge for measuring crack
     widths
10. Loading arrangement for shear test on joints
11. Gauge for measuring surface irregularity

Describes precast concrete cylindrical pipes, bends and junctions strengthened by chopped zinc-coated steel fibres and intended to be used for the carrying, under atmospheric pressure, of sewage or surface water, and for the construction of culverts. A range of nominal sizes of units is covered, namely DN 375 to DN 1200, by increments of 75, and minimum crushing strengths, as determined by standard tests, is given for each nominal size of pipe.

Committee
CAB/12
DocumentType
Standard
Pages
20
PublisherName
British Standards Institution
Status
Superseded
SupersededBy

BS 4485-4:1996 Water cooling towers Code of practice for structural design and construction
BS 8005-1:1987 Sewerage Guide to new sewerage construction

BS 957-2:1969 Specification for feeler gauges Metric units
BS 903-A26:1969 Physical testing of rubber Determination of hardness
BS 812-1:1975 Testing aggregates Methods for determination of particle size and shape

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US$160.51
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