Appendix: Aggregate properties
Published:January 01, 2001
In this appendix some information on aggregate properties is given. First some properties of currently produced British aggregates, second some more generalized data on aggregate properties worldwide, and third some information on how weathering affects the properties of aggregates. It is strongly emphasized that all the information given in this Appendix must be regarded as providing only a general appreciation of aggregate properties and should not be relied upon for specific test values for particular rocks or sources.
Table A1 gives some test results for 96 aggregates from quarries in Great Britain. The information is not exhaustive but comes solely from fact-sheets issued by the suppliers or from information provided to members of the Working Party by the suppliers. None of the data has been confirmed independently. Where the quarry is not named in the Table this omission is at the request of the supplier. Because aggregate properties are liable to vary, the test results in the Table should not be taken as an indication of present production for particular quarries; instead prospective users should seek up-to-date information from the suppliers. It should be borne in mind that suppliers will not usually work poor quality sources of aggregate, nor provide data on them.
The rock descriptions are those of the suppliers, supplemented in some cases by reference to entries in directories of quarries (BGS 1984 and BACMI 1986). The classification in Table A1 is by the broad rock groups used in the
Figures & Tables
Aggregates: Sand, gravel and crushed rock aggregates for construction purposes
In 1985, the Geological Society published Aggregates as the first volume in its Engineering Geology Special Publication series. It met with immediate acclaim, being awarded the Brewis Trophy by SAGA in 1986.
“If your work involves the use of aggregates, buy this book and read no further; this volume will be an essential and valuable reference that you will use for many years.” (Canadian Geotechnical Journal 1988)
In 1989, the working party whose work had resulted in the publication of Aggregates was reconvened to revise, update and extend their report. Each chapter was reviewed by independent referees. The second and greatly improved edition, published in 1993 and reprinted in 1998, represented the distillation of a vast body of knowledge and experience held not only by the members of the working party, but also by many international experts, scientists and engineers who contributed as reviewers, referees and corresponding authors.
Owing to continued demand for this unique reference book, a group of aggregate specialists was convened in 1999 in order to review thoroughly and update Aggregates for this third edition.
Outline of contents: Introduction; Occurrences; Field investigations; Extraction; Processing; Classification; Testing; Aggregates for concrete; Aggregates for mortar; Unbound aggregates; Bituminous bound aggregates; Rail ballast; Filter media; Appendix: Aggregate properties; Glossary; Index.
Working Party Members and/or third edition Reviewers: Mr L. Collis (formerly Sandberg); Professor P. G. Fookes (Chairman; consulting engineering geologist), Mr R. A. Fox (formerly RMC Aggregates (UK) Ltd), Professor G. P. Hammersley (formerly Laing Technology Group, now BRE), Mr P. M. Harris (formerly BGS), Dr I. E. Higginbottom (formerly Wimpey Environmental Ltd), Mr J. Lay (RMC Aggregates (UK) Ltd), Dr G. Lees (formerly University of Birmingham), Mr D. I. Roberts (Land and Mineral Resource consultants), Mr A. R. Roeder (formerly British Cement Association), Dr I. Sims (Secretary; formerly Sandberg, now STATS Limited), Dr M. R. Smith (formerly Imperial College, now the Institute of Quarrying), Dr R. G. Thurrell (formerly BGS), Dr G. West (formerly TRL).