BS 4551:1980

Foreword
Cooperating organizations
Section one. General
0. Introduction
1. Scope
2. References
3. Definitions
4. Sampling
Section two. Chemical testing
5. Laboratory preparation of samples for chemical
    analysis
6. Chemical analysis and aggregate grading
7. Calculation of mix proportions and interpretation
    of results
Section three. Physical testing
8. Laboratory preparation of mortar mixes
9. Procedure for plant and site mixed mortars
10. Determination of consistence by dropping ball
11. Determination of consistence retentivity and water
    retentivity
12. Determination of flow
13. Determination of air content of freshly mixed mortars
14. Determination of stiffening rate
15. Determination of strength
16. Determination of bulk density of hardened mortar or
    plaster
17. Certificate of physical tests
Appendix A
Details of flow table
Tables
1. Available lime contents of nominal volume mixes
2. Equations for the calculation of composition of
    freshly mixed or hardened mortars, screeds and
    plasters
3. Composition of types of mortars, screeds and plasters
4. Guide to minimum quantity of materials required for
    various tests
5. Percentages of fractions of standard sands
6. Composition of laboratory mixes
Figures
1. Typical mixer bowl and blade
2. Diagrammatic representation of ball release
3. Suitable device for measuring penetration
4. Apparatus for measurement of air content (pressure
    method)
5. Flow table and conical mould
6. Determination of stiffening rate of mortar
7. Compression jig for 25 mm x 25 mm x 100 mm mortar
    specimens

Methods of sampling, analysis, preparation and testing of mortars for bricklaying, screeding, plastering and rendering.