Accession Number : AD0700466

Title :   EFFECTS OF THERMAL SHRINKAGE ON BUILT-UP ROOFING,

Corporate Author : NATIONAL BUREAU OF STANDARDS WASHINGTON D C

Personal Author(s) : Cullen,William C.

Report Date : 04 MAR 1965

Pagination or Media Count : 10

Abstract : The effects of thermal movement of bituminous built-up roof membranes are related to some common failures of built-up roofing observed in field exposures. A procedure for determining the amount of thermal movement of built-up membranes is described. Data are given for the thermal movement of various bitumens and reinforcing felts used in the construction of built-up roofs and for the composite membranes over a temperature range construction of built-up roofs and for the composite membranes over a temperature range of +30 to -30F. The data obtained are related to field experience and suggestions are presented which will prove beneficial in reducing the incidence of built-up failure due to thermal movement. (Author)

Descriptors :   (*ROOFS, CONSTRUCTION MATERIALS), (*BITUMINOUS COATINGS, THERMAL STRESSES), MEMBRANES, SHRINKAGE, FAILURE(MECHANICS), EXPOSURE(PHYSIOLOGY), CRACKS, ASPHALT, COAL TAR, LOADS(FORCES), MOISTURE, ADHESIVES, STRAIN(MECHANICS), CONSTRUCTION

Subject Categories : Construction Equipment, Materials & Supplies
      Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE