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A thin layer of refractory mortar is placed on the firebrick with a small square margin trowel. Refractory mortar used in fireplaces is made with high temperature cements and carefully selected aggregates. Many fireplace masons are not familiar with refractory mortar, or they confuse the product with fireclay mortar.
Refractory Mortars are finely ground refractory materials which become plastic when mixed with water. Theses are used to bond the brickwork into solid unit, to provide cushion between the slightly irregular surfaces of the brick, to fill up spaces created by a deformated shell, and to make a wall gas –tight to prevent penetration of slag into the joints.
Mortars consist of finely ground refractory materials mixed with water to form a paste. They are used for laying and bonding shaped refractory products such as bricks. They are normally applied by trowelling.
Firebrick is mortared with refractory cement, which, unlike regular masonry mortar, can withstand high heat. Refractory cement comes premixed in a bucket and has the consistency of peanut butter. A margin trowel makes it easier to scoop cement out of the bucket and butter the bricks.
Applications : Industrial, Oil & Gas, Power Plants, refineries, Foundaries,Cement & Glass Industries