Rock durability in the marine environment

Rubble mound breakwaters and seawalls use large quantities of quarried rock. Whilst the largest such structures may use concrete units as primary armour, large rock sizes are used as primary and/or secondary armour on most rubble structures. However, designs of such sutures seldom allow for degradation of the rock under maritime conditions. This report addresses the problems of assessment of degradations, and suggests tests and acceptance values for suitable rock durability.