Preparation and properties of corundum HCBS and ceramic concretes. Part 3. Casting and volume constancy of ceramic concretes

Vibration casting and casting from a self-spreading mix with an original moisture content of molding systems of 3.8 – 4.2% are used to prepare coarse-grained ( D max = 10 mm) and medium-grained ( D max = 3 mm) corundum ceramic concretes with a corundum-mullite matrix system. Depending on the heat treatment temperature, the amount of their open porosity is 11 – 15%, and the ultimate strength in compression reaches 160 MPa. Both cast and compacted ceramic concretes have high volume constancy during heating or firing, and also in service. Linear shrinkage does not exceed 0.2 – 0.5%.