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2. B.S. 1377: Part 4. Methods of test for Soils for civil engineering purposes – Compaction-related tests. London: British Standards Institution; 1990.
3. B.S. 1377: Part 8. Methods of test for soils for civil engineering purposes – shear strength tests (effective stress). London: British Standards Institution; 1990.
4. B.S. 812: Part 110. Method of determination of the aggregate crushing value (ACV). London: British Standards Institution; 1990.
5. B.S. 812: Part 111. Methods for determination of ten per cent fines value (TFV). London: British Standards Institution; 1990.