Bunker's concrete screw pumps were designed to pump grain size up to 25 mm. You will pump lightweight concrete and polystyrene concrete. Particularly adapted to spray traditional or fibre-reinforced mortars, cement or anhydrite-based self-levelling floor screeds, self-compacting concrete. You could also spray plaster and wet sprayed concrete (until 8 mm) and inject cement grout and bentonite into piles and anchors.