Features and Applications of Composite Manhole Covers
Dec. 23, 2021
The composite manhole cover is a new type of manhole cover with a low cost. It takes unsaturated polyester resin as the main raw material and adopts pressing technology. The composite manhole cover is pressed under high temperature and pressure at one time, so it has high strength, high density, high tensile strength, and good impact performance. At the same time, the composite manhole cover also has the advantages of wear resistance, corrosion resistance, zero pollution, and maintenance-free.
Advantages of composite manhole cover
The product uses mesh reinforcement to increase internal strength, which can quickly disperse the pressure generated by people and vehicles to ensure people's own and property problems. Because the metal used in composite manhole cover is not more than one-tenth of its own weight, and the strength of composite manhole cover is so high that it is not worth stealing more.
At the same time, the composite manhole cover fiber-reinforced materials are characterized by small specific gravity and high specific strength and modulus. For example, carbon fiber and epoxy resin composite have much higher specific strength and specific modulus than steel and titanium alloy and have excellent chemical stability, friction reduction, wear resistance, self-lubricating, heat resistance, fatigue resistance, creep resistance, anechoic, electrical insulation and other properties. The compound of graphite fiber and resin can obtain the material with an expansion coefficient almost equal to zero.
Another characteristic of fiber-reinforced materials is anisotropic, so the arrangement of fibers can be designed according to the strength requirements of different parts of the product. Aluminum matrix composites reinforced with carbon and silicon carbide fibers can maintain sufficient strength and modulus at 500. Moreover, different reinforcing materials are used according to different parts of the composite manhole cover, and the surface layer adopts quartz sand particles as filling material with good wear resistance. Adding a UV absorber improves the anti-aging effect of the product. The structural layer can give full play to the continuous fiber characteristics, so that the composite manhole cover has a higher bearing capacity, longer service life, and greater market competitiveness, without any steel reinforcement.
Scope of application of composite manhole cover
The general manhole cover for drainage is made of flat steel and twisted square steel or welded flat steel and flat steel. It has the advantages of beautiful appearance, good drainage, high strength, many specifications, and low cost, so steel grating is usually used. As we know, it is made of polymer composite material and pressed by hydraulic press, which has high impact strength. Therefore, we are concerned about the scope of its use.
Composite manhole covers heavy-duty ductile iron manhole cover for asphalt pavement for motor vehicles in parks. Common and polymer-based composite inspection manhole covers are used for motor vehicles with pavement requirements. Polymer-based composite inspection well covers are used for non-motorized vehicles in parks. Inspection well covers with steel fiber concrete inspection wells in parkland. Rainwater inlets in motorized driveways are covered with heavy-duty ductile. The sunken courtyard is covered with a common polymer-based composite manhole cover. Some of the good covers in the green area are covered with concrete material.
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