Rock revetments and structures have been used successfully in coastal, river and dam engineering for many years. By combining the strength of rock and the flexibility of mastic grout, an incredibly robust and versatile material is available to engineers when combating erosion and scour.
Engineering advantages of grouted rock
- Security of structure increased by bound rather than individual elements
- Security of vulnerable sections of rock structure increased by local application
- Angle of designed slope can be increased when grout is added to rock
- Bituminous grout can be placed underwater
- A heat tolerance can be built into grout design appropriate for local climate
There are 4 different techniques for grouting as follows
Fully grouted stone is a very robust material virtually unaffected by waves and currents. Used in locations where the integrity of the structure is crucial and access for maintenance is difficult. Placed as a layer it is flexible and will follow settlements for toe details.
Grouting the most vulnerable parts of a rock structure will give additional security to these areas. For example, the ends of breakwaters/groynes and the inter-tidal zone of revetments.
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