TRAVEL SYSTEM PINPOINTS HEAT DELIVERY

A battery of infrared heaters were used to cure a polymer-impregnated concrete bridge deck designed for extra-long service life. The heaters were a vital part of a preservation treatment called polymerization which is expected to double slab life. It involves soaking the slab with a chemical monomer combined with an initiator and a cross-linking agent to produce a shielding material when the slab is cured by applied heat. The slab is thus impervious to moisture and deicing chemicals that cause cracking and corrosion. Two heating units, 9 ft wide and 65 ft long were assembled for the almost 65-ft wide deck, using 50,000 BTU heaters per unit. A 2-in.-dia gas manifold spanned the reworked finishing bridge and the heaters came off the manifold individually. The two rows of heaters were mounted about 32 in. above the concrete surface, approximately 44 in. c-c transversely and 4 ft c-c longitudinally. Details of the treatment and the polymerization sequence are outlined.

  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  USA  10036
  • Publication Date: 1977-12

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00170201
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 7 1978 12:00AM