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Water and/or fire resistant tunnel expansion joint systems

  • US 10,316,661 B2
  • Filed: 10/29/2015
  • Issued: 06/11/2019
  • Est. Priority Date: 11/20/2008
  • Status: Active Grant
First Claim
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1. A fire and water resistant tunnel expansion joint system, comprising:

  • a fire resistant coating applied at a predetermined thickness to achieve a substantially uniform layer on substrates of a tunnel; and

    a fire and water resistant expansion joint including;

    a compressible core having an edge, wherein the substantially uniform layer of the coating extends along the substrates of the tunnel to the edge of the core; and

    a fire retardant material infused into the core in an amount effective to pass UL 2079 testing, the core configured to facilitate compression of the expansion joint system between the substrates;

    wherein the core has a compressed density of between about 160 kg/m3 to about 800 kg/m3; and

    wherein the coating and the fire and water resistant expansion joint are capable of withstanding exposure to a temperature of about 540°

    C. at about five minutes and are adapted to pass the UL 2079 testing.

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