Abstract: An anchor element is provided with a body of bonded particulate material e.g., a sleeve of silicate bonded sands. The element is received in a borehole with the sleeve adjacent the blind end. When a compressive force is applied between the ends of the body, the particles move closer together to form an annulus of compacted particulate material bridging the element and the wall of the borehole.

Abstract: An anchor element is provided with a body of bonded particulate material, e.g. a sleeve of silicate bonded sands. The element is received in a borehole with the sleeve adjacent the blind end. When a compressive force is applied between the ends of the body, the particles move closer together to form an annulus of compacted particulate material bridging the element and the wall of the borehole.

Abstract: An anchoring cartridge for use in anchoring an anchor element in a hole in a substrate by means of a self-setting composition comprising interactive solid and liquid components. The cartridge comprises a container (1) housing the solid component (4) of the composition, the container being formed of a material such as metal or plastics, which does not absorb the liquid component of the composition. The container has a plurality of holes (2), preferably each between 0.1 mm2 and 500 mm2 in area, whereby when the cartridge is immersed in the liquid component, the liquid passes through the holes (2) into the container (1) and reacts with the solid component (4) to form the self-setting composition. When the cartridge is immersed in the liquid component, loss of self-setting composition through the holes (2) is prevented by, for example, including a thixotropic agent in the composition or by compaction of the solid component (4).