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  1. JeroenvD

    polypropylene fibers in concrete

    Ginger, Recently we have carried out some test with a 80 N/mm2 concrete with 2 kg PP fibres reinforcement. THe concrete was exposed to a temperature of 1200 degrees (TNO). The test result of one piece was acceptabel but the other was very bad. As the steel fibres have no influence on spalling...
  2. JeroenvD

    polypropylene fibers in concrete

    Ginger, After the good test results, did you also apply the PP fibres in a real tunnelling project and if so were no additional fire prevention/protection measures taken? thanks, Jeroen

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