BS DD249(1999) : 1999
Withdrawn
TESTING AGGREGATES - METHOD FOR THE ASSESSMENT OF ALKALI-SILICA REACTIVITY - POTENTIAL ACCELERATED MORTAR-BAR METHOD
Hardcopy , PDF
English
01-01-1999
06-19-2014
Committees responsible
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Reagents and materials
7 Storage solution
8 Sampling
9 Preparation of test aggregate
10 Preparation of test specimens
11 Test procedure
12 Calculations and classification
13 Test report
Annex A (informative) Aggregate combinations for testing
Annex B (informative) Estimate of precision
Annex C (normative) Classification criteria
Bibliography
Table 1 - Grading requirements for the test aggregate
Table B.1 - Critical ranges and reproducibility limits for
the accelerated mortar-bar method when a test
result is obtained as the mean expansion of three
bars from one mortar batch
Table C.1 - Classification criteria
Describes a method for predicting the potential for expansion of concrete caused by the alkali-silica reactivity (ASR) of aggregates and combinations of aggregates. The test duration is normally 16 days.
| Committee |
B/502/6
|
| DevelopmentNote |
Reviewed and confirmed by BSI, November 2011. (10/2011)
|
| DocumentType |
Draft
|
| Pages |
12
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
|
| PD 6682-9:2003 | Aggregates Guidance on the use of European test method standards |
| S.R. 24:2004 | GUIDANCE ON THE USE AND APPLICATION OF EUROPEAN TEST METHOD STANDARDS FOR AGGREGATES |
| ASTM C 1260 : 2014 : REDLINE | Standard Test Method for Potential Alkali Reactivity of Aggregates (Mortar-Bar Method) |
| BS 812-104:1994 | Testing aggregates Method for qualitative and quantitative petrographic examination of aggregates |
| BS 4551-1:1998 | Methods of testing mortars, screeds and plasters Physical testing |
| BS 812-100:1990 | Testing aggregates General requirements for apparatus and calibration |
| BS 812-101:1984 | Testing aggregates Guide to sampling and testing aggregates |
| ISO 5725-2:1994 | Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method |
| BS 812-123:1999 | Testing aggregates Method for determination of alkali-silica reactivity. Concrete prism method |
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