Mudcrete

Mudcrete is a structural material (employed, for example, as a basecourse in road construction) made by mixing mud (usually marine mud) with sand and concrete/cement. It is used as a cheaper and more sustainable alternative to rock fill.^[1] It is also used in such projects as land reclamation.^[2]

References

1. Upper Harbour Bridge Duplication & Causeway Widening – Innovate NZ, Brochure of the '2007 ACENZ Awards of Excellence', Page 19
2. New Zealand's biggest port project ramps up Archived 8 October 2006 at the Wayback Machine (Ports of Auckland website, Wednesday 3 November 2004. Retrieved 2007-09-26.)