E - Fixed Constructions – 01 – C
Patent
E - Fixed Constructions
01
C
E01C 11/26 (2006.01) H05B 3/54 (2006.01)
Patent
CA 2143876
A road heater having (1) an elongated heater including an elongated heating element and a flexible electrically insulating layer formed on the entire periphery of the heating element, and (2) an outer textile structure such as a braid which covers the entire periphery of the heater. The road heater has a compressive yield load (Lc) of at least 1,000 kg. The outer textile structure is made of a thermoplastic synthetic fiber, preferably, a polyester monofilament, having a melting point of at least 200°C and a single fiber fineness of at least 1,000 deniers. The elongated heating element preferably comprises a flexible heat-generating mixed spun yarn composed of stainless steel fibers and heat-resistant electrically non-conductive fibers. The road heater can be embedded into asphalt concrete compositions without damage to the heating element and without cooling of the composition prior to compressing and smoothing thereof. This significantly shortens the paving process and provides for a heated road surface of increased surface strength.
Borden Ladner Gervais Llp
Teijin Limited
LandOfFree
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