Solutions for fracture of plastic runway materials.
Release date:2018-04-12 Author: Click:
In the area with large variation in temperature difference between day and night, the porous plastic runway of this kind of structure is generally found to be fractured by the expansion of the cement concrete base.
The cause of fracture of cement concrete expansion suture of plastic runway materials:
And the basis of plastic runway, most of the construction unit USES cement concrete () because of its low cost, and cement concrete foundation strong rigidity, need for concrete pavement reserved or cutting expansion joints. The expansion joints will shrink with the change in ambient temperature (expansion joints widen) or expand (expansion joints narrow).
Solution to the fracture phenomenon in the plastic runway of cement concrete expansion:
Because the elastic layer of the air permeable plastic runway is used to add a certain proportion of polyurethane glue to a certain proportion of polyurethane glue, the construction is carried out by means of mechanical spreading. Requirements before paving elastic layer, based on the cement concrete besmear to brush the underlying polyurethane glue, 15 cm at expansion joints - 20 cm should besmear to brush bottom insulation coating, not besmear to brush the underlying polyurethane glue, in order to prevent low temperature when the firm bonding of plastic runway surface and cement concrete, expansion joints once contraction, expansion joints in the extension of plastic runway surface does not have enough distance, there was a plastic runway surface resulting in cement concrete shrinkage fracture phenomenon.
(at the expansion joint on both sides of the coating layer insulation coat, make the plastic runway on both sides of the expansion joint not direct bonding on the cement concrete, low temperature, concrete shrinkage, expansion joint open, 15 cm - 20 cm wide plastic runway surface tensile extension, can effectively guarantee the cement concrete expansion sew plastic runway surface won't appear rupture phenomenon).
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