Covers are often stolen. What can be done? Various industries have come up with different methods such as: anti-theft locks, cover wireless anti-theft, five guards cover, etc., but want to really solve this problem from the composite well cover material will be better, and now more common composite material covers cover most of the The following kinds:
——Manufacturing of Recycled Resin Composite Manhole Cover: Use waste plastic or nylon and fly ash in the molten state to mix and press and shape.
This type of thermoplastic well cover is repeatedly rolled by the vehicle when the temperature is high, and the well cover will gradually produce creep, which causes the middle part of the well cover to continuously sink and fall off, forming a trap.
——Steel fiber reinforced concrete manhole cover production: Concrete manhole cover after transformation results. However, due to the material, it is very brittle and has weak strength. Although soft steel fiber is added, the bearing capacity of the manhole cover is still not strong, resulting in defects such as fragility, bulkiness, difficulty in opening, and rough appearance.
- BMC molded manhole cover production: unsaturated resin is mainly used as material, filled with calcium carbonate materials.
The rebar is a metal material, while the BMC is an organic material. The coefficient of thermal expansion of the BMC is twice that of the rebar. Due to the rust on the surface of the rebar, the interface between the BMC and the BMC is not firmly bonded. When the temperature changes, the rebar and BMC materials are changed. The interfacial interface will form stress, and the repeated rolling of the vehicle will cause the separation of the reinforcing steel and the BMC interface, and eventually the manhole cover will lose its bearing capacity.
Composite well covers made of polymer composites do not have recycling value. Composite manhole cover can effectively prevent the cover from being stolen. The service life is as long as 20 years. The low price is a good choice.
——Manufacturing of Recycled Resin Composite Manhole Cover: Use waste plastic or nylon and fly ash in the molten state to mix and press and shape.
This type of thermoplastic well cover is repeatedly rolled by the vehicle when the temperature is high, and the well cover will gradually produce creep, which causes the middle part of the well cover to continuously sink and fall off, forming a trap.
——Steel fiber reinforced concrete manhole cover production: Concrete manhole cover after transformation results. However, due to the material, it is very brittle and has weak strength. Although soft steel fiber is added, the bearing capacity of the manhole cover is still not strong, resulting in defects such as fragility, bulkiness, difficulty in opening, and rough appearance.
- BMC molded manhole cover production: unsaturated resin is mainly used as material, filled with calcium carbonate materials.
The rebar is a metal material, while the BMC is an organic material. The coefficient of thermal expansion of the BMC is twice that of the rebar. Due to the rust on the surface of the rebar, the interface between the BMC and the BMC is not firmly bonded. When the temperature changes, the rebar and BMC materials are changed. The interfacial interface will form stress, and the repeated rolling of the vehicle will cause the separation of the reinforcing steel and the BMC interface, and eventually the manhole cover will lose its bearing capacity.
Composite well covers made of polymer composites do not have recycling value. Composite manhole cover can effectively prevent the cover from being stolen. The service life is as long as 20 years. The low price is a good choice.
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