BS DD83(1983) : 1983

Foreword
Cooperating organizations
Recommendations
Section one. General
1. Scope
2. Definitions
Section two. Sampling
3. Sampling and sample reduction
Section three. Analysis methods
4. General
5. Buoyancy (BS 1881) method
6. Chemical (GLC) method
7. Constant volume (RAM) method
8. Physical separation (Laing) method
9. Pressure filter (Sandberg) method
10. Water content
11. Report of sample and test data
Section four. Assessment of the accuracy and precision
of the analysis methods
12. General
13. Procedure A: laboratory assessment of accuracy and
     repeatability
14. Procedure B: precision of sampling, sample reduction
     and testing
15. Procedure C: accuracy and precision of calibrations
16. Procedure D: assessment of precision of sample
     reduction and testing from routine tests
Section five. Procedure for assessing compliance
17. General
18. Considerations affecting compliance
19. Assessment of compliance
Appendix
A. Purchaser's risks
Tables
1. Sample and test sample masses
2. Concentrations of cement solutions for flame photo-
     meter calibrations
3. Procedures for assessing bias components
4. Procedures for assessing precision components
5. Calculation of bias and repeatability in procedure A
6. Calculation of repeatability and sampling standard
     deviation in procedure B
7. Calculation of bias and calibration standard
     deviation in procedure C
8. Calculation of repeatability and standard deviation
     of sample reduction and testing. Procedure D
9. Summary of bias values for insertion in the
     compliance equation
10. Summary of standard deviation values for insertion
     in the compliance equation
11. Purchaser's risks and corresponding normal
     probability distribution constants
12. Purchaser's risks when the assumed values in tables
     9 and 10 (method A) are appropriate
Figures
1. Apparatus for buoyancy methods
2. General assembly diagram including sampling tower
3. Suitable dimensions for a siphon can
4. Typical cement calibration curve
5. Aggregate calibration line
6. Rapid analysis machine (RAM): general assembly
     diagram
7. Calibration line
8. General assembly diagram
9. Splitter unit
10. Aggregate calibration lines

Describes the assessment of the composition of fresh concrete. Gives procedures to be used for sampling and sample reduction, five methods of analysing fresh concrete, one solely for the determination of the water content by drying, methods for the assessment of the accuracy and precision of the five methods of analysis, procedures by which the test results can be used for compliance purposes, and the form of reports to be used.