BS DD218(1995) : 1995

Superseded

View Superseded by

TESTING AGGREGATES. METHOD FOR DETERMINATION OF ALKALI-SILICA REACTIVITY. CONCRETE PRISM METHOD

Available format(s)

Hardcopy , PDF

Superseded date

06-15-1999

Language(s)

English

Published date

01-01-1995

Publisher

British Standards Institution

Committees responsible
Foreword
1 Scope
2 References
3 Definitions
4 Principle
5 Sampling
6 Apparatus
7 Materials
8 Preparation of aggregate test portions
9 Mix design
10 Temperature and humidity conditions
11 Preparation of test prisms
12 Storage and measurement
13 Calculation and expression of results
14 Precision
15 Test report
Annexes
A (informative) Procedure for checking the uniformity
     of the temperature within the room or cabinet used
     for storing the test prisms at (38 + or - 2) deg C
B (informative) Proforma for calculating batch
     weights
C (informative) Precision
Tables
1 Mix proportions by volume for cement and dry
     aggregates
2 Temperature and humidity requirements
B.1 Proforma for calculating batch weights for a
     7-litre concrete mix from volume proportions
C.1 Precision of the determination of the expansion of
     concrete prisms
Figures
1 Example of stainless steel reference stud
2 Example of reference stud providing hemispherical
     bearing
3 Example of length comparator
4 Container to provide humid environment around
     concrete prism
List of references

Describes a method of measuring the expansion of concrete produced by alkali silica reaction involving specific combinations of aggregates. Coverage includes: apparatus, mix design, materials, precision, and preparation of aggregate test portions. Also gives definitions, tables, diagrams and annexes.

Committee	B/502
DocumentType	Standard
Pages	20
PublisherName	British Standards Institution
Status	Superseded
SupersededBy	BS 812-123:1999