Explanatory notes
… materials as chamotte and dinas earths, crushed or ground corundum, powdered quartzites, chalk, calcined … aluminous cements) and refractory aggregates, used for the foundation of furnaces, coke ovens, etc., or for patching … pneumatic rammers, form a dense coating or filling . (c) Gunning mixes , which are refractory aggregates mixed with …