The composite manhole cover has high strength, low price and beautiful appearance. It can be colored arbitrarily, and it is convenient to install, maintain, and identify. Because it has no recycling value, it completely solves the problem of anti-theft. my country will gradually switch to composite manhole covers in the next three to five years, which has great market potential.
The composite manhole cover has high strength, low price and beautiful appearance. It can be colored arbitrarily, and it is convenient to install, maintain, and identify. Because it has no recycling value, it completely solves the problem of anti-theft. my country will gradually switch to composite manhole covers in the next three to five years, which has great market potential. Its advantage is that it does not use steel frame reinforcement, but glass fiber composite reinforcement, which belongs to the GRC type product. Therefore, it has the advantage of being unaffected by the continuous price increase of steel. Because it does not contain a little iron, it is more anti-theft than stone plastic and fiber concrete manhole covers. Its comprehensive performance is between the stone-plastic manhole cover and the concrete manhole cover, and is better than concrete; it can be applied to occasions with higher technical requirements for the manhole cover.
In composite materials, fiber reinforced materials are widely used and used in large amounts. For example, carbon fiber and epoxy resin composite materials have specific strength and specific modulus several times larger than steel and aluminum alloys. They also have excellent chemical stability, friction reduction, wear resistance, self-lubrication, heat resistance, fatigue resistance, and Creep, noise reduction, electrical insulation and other properties. The composite of graphite fiber and resin can obtain a material whose expansion coefficient is almost equal to zero. Another feature of fiber reinforced materials is anisotropy, so the fiber arrangement can be designed according to the strength requirements of different parts of the part. The aluminum-based composite material reinforced with carbon fiber and silicon carbide fiber can still maintain sufficient strength and modulus at 500°C.