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What are the advantages of Unbonded PC Strand?

What are the advantages of Unbonded PC Strand?
Update Time:2016-09-18

With anti-corrosive grease as the protective layer and polyethylene plastic as protective material, unbonded pc strand is isolated from concrete, and as a result, the unbonded pc strand can move flexibly within the protective material and this makes construction process easier. In addition, the protective materials will bring better corrosion resistance property and increase its service life.