The furnace lining or prefabricated components made of castable poured on site have a large total elongation after thermal expansion. Without appropriate expansion joints, the furnace lining may be bent or damaged. So we need to reserve expansion joints.
The forms of expansion joints in pouring materials are basically divided into two types: through joints and non through joints. The reservation of expansion joints for pouring materials mainly involves selecting the spacing, width, and form of the expansion joints. What is the size of the expansion joint for different materials of castables
High aluminum casting material is 6-8mm;
The water glass casting material is 4-6 mm;
Phosphate based castable is 6-8mm;
The silicate cement casting material is 5-8mm
Expansion joint filler and its thickness should be reserved according to the design. When the design does not specify, asbestos board or plywood should be used for filling, with a thickness of 4-5mm.
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