Evaluation of solid-block and cementitious foam seals

Details

• Personal Author:
  Greninger, Nevin ; Luzik, S. J. ; Stephan, Clete R. ; Weiss, Eric S.
• Corporate Authors:
  United States. Bureau of Mines. Pittsburgh Research Center ; United States.‏ ‎Mine Safety and Health Administration‏. Bruceton Industrial Safety Division
• Description:
  "The U.S. Bureau of Mines conducted explosion tests on various full- scale cementitious bulkheads used in abandoned mine areas to evaluate the ability of the bulkheads to withstand gas explosion overpressures of 20 psig. Tests were performed on 120-ft2 solid- concrete-block seals of varying thicknesses and designs. Of the seven solid-concrete-block seals tested, only the standard-type seal, having a 16-in thickness, keyed at the floor and ribs, all joints mortared, wedged at the roof, and a center pilaster, maintained its integrity when subjected to a 20-psig pressure wave. After being subjected to repeated explosions, the standard seal only showed a small hairline crack and had an air leakage of 87 ft3/min at a pressure differential of 1 in h2o. Tests were performed on cementitious foam seals of varying thicknesses and compressive strengths. Explosion tests have shown that 200-psi strength, 4- and 8-ft-thick seals can withstand a 20-psig pressure wave. At a pressure differential of 1 in h2o, no air leakage was detected through the 200-psi, 8-ft-thick foam seal." - NIOSHTIC-2
  
  NIOSHTIC no. 10011048
  
  
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• NIOSHTIC Number:
  nn:10011048
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3b578eb17e93b1db1d5059d4735a65dc50029fa9919554e8ffbbbd5f114cc93d2987092aff12ef74d47a0d7901d3a023f7b5e4675731175bdee2f4bad3d7173a
• Download URL:
  https://stacks.cdc.gov/view/cdc/9581/cdc_9581_DS1.pdf
• File Type:
  [PDF - 1.24 MB ]