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Why choose plastic instead of metal to make rebar chair?

Views:36     Author:Sarah     Publish Time: 2018-07-30      Origin:Site

Why choose plastic instead of metal to make rebar chair?

plastic vs metal

                                   Plastic                                      Metal

 resistance to corrosion and chemicals

 low electrical and thermal conductivity

 high strength-to-weight ratio,

 colors available in a wide variety and 

 transparent

 resistance to shock

 good durability

 low cost,

 are easy to manufacture,

 resistant to water and have low toxicity.

  Good electrical conductors and heat 

  conductors.

  Malleable

  Ductile

  Possess metallic luster.

  Opaque as thin sheet.

  Solid at room temperature (except Hg).

   By comparing plastics and metals, we choose plastics to make rebar chair  better because plastics are more resistant to corrosion.

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   Metal is often considered to be sturdier than plastic; however the energy created by the reaction of metal pieces with the different compounds of concrete will cause cracking within the concrete.  Plastic does not interact with the concrete in the same way as metal, and plastic will not cause concrete to crack.

   Plastic rebar supports are not only economically friendly, but will ultimately extend the life of any concrete product that is manufactured.

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