Marine-dredged aggregates make a significant contribution to the supply of aggregates in the UK. In England and Wales, marine sand and gravel make up about 8% of the total primary aggregates and 20% of the total sand and gravel. This Digest considers marine aggregates in relation to the requirements in European Standards for concrete and aggregates and the latest guidelines for preventing alkali-silica reaction. It is intended to serve as a baseline document for specifiers but will also be of interest to clients and their advisors. It is a revised edition of DG473, which is now withdrawn.

Pages: 6

Format: A4

Illustrations: 1 line drawing, 3 photos

Contents
What are marine aggregates? Relevant European standards - Chlorides - Shell content - Polishing characteristics of concrete road pavements Protecting reinforcement Alkali-silica reaction (ASR) References Further information