- Time:Jun 27, 2023
refractory brick expansion joints refer to certain gaps left in the refractory brick structure to absorb thermal expansion and contraction caused by temperature changes. The following are commonly used refractory brick expansion joint construction methods:
1. Groove expansion joint: Cut the groove on the surface of the brick, and then fill it with silicate or high-alumina cement slurry with better thermal conductivity. This method can keep the expansion joint consistent with the brick surface, but it needs to pay attention to control the filling depth so as not to affect the quality of the brick surface.
2. Round tube expansion joints: Drill holes on the surface of refractory bricks and embed round tubes of the same material, usually made of stainless steel, copper, nickel and other materials. This method has the advantages of firmness and reliability, large expansion joint volume, etc., but it needs to pay attention to control the drilling depth to avoid damage to the inside of the brick body.
3. Sandwich expansion joint: Sandwich expansion joint is to place a layer of dense refractory fiber felt or fire-resistant board material inside the refractory brick to form a sandwich structure. The advantage of this method is that the gap precision is high and the construction is convenient, but it needs to pay attention to controlling the thickness of the interlayer and the selection of materials.
4. Expansion joint strip type expansion joint: expansion joint strips embedded in flexible materials on the surface of refractory bricks, such as rubber, polypropylene, etc. This method has the advantages of good sealing and strong waterproof performance, but it needs to choose wear-resistant and impact-resistant materials.
In short, when constructing refractory brick expansion joints, it is necessary to choose the appropriate method according to the specific situation, and pay attention to the control of construction quality and dimensional accuracy.
