Artificial concrete rock structure, useful in design of marine artificial reefs, comprises external and internal cavities and crevices, where part of cavities and crevices has specific size

摘要

The artificial concrete rock structure comprises multiple external and internal cavities and crevices, where a porosity of the structure is 20-80%. A part of the external and internal cavities and crevices has a size of lower than 1 cm. An independent claim is included for a method for producing porous rock structures.