Engineering geology has traditionally been concerned more with interaction between the engineering structure and its geological environment than with the performance of rock aggregates in the structure itself. In recognition of this imbalance, the Engineering Group of the Geological Society established a Working Party in 1978 to compile a reasonably comprehensive document covering the most important aspects of natural and crushed rock aggregates used for construction purposes. The objectives of the Working Party are set out in detail in Section 1 of the Working Party Report, which is being published by the Geological Society in separate book form.
The membership of the Working Party, under the Chairmanship of Professor Peter Fookes, reflected a broad range of expertise and consisted of experienced individuals involved with construction materials, including producers, specifiers, users and researchers. The Working Party members are listed at the end of this summary.
The first complete draft of the Report was submitted for open discussion at a one-day session of the 17th Annual Regional Meeting of the Engineering Group in 1981 at Bangor. A great number of suggestions arising from the open discussion have been considered in the preparation of the final Working Party Report; additional advice has been obtained from a considerable body of corresponding members and professional organizations. The Working Party Report contains a full list of acknowledgments.
The Report was written for a wide audience and is intended to provide basic information on subjects that are new to the reader as well as serving