Report of Investigations 9539: Effects of Remote Drop and Pumpdown Placement on Cellular Concrete

Details

• Journal Article:
  Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9539
• Personal Author:
  Boreck, Donna L. ; Miller, Richard E.
• Description:
  The hazards to the public posed by abandoned mine shafts are well documented. As private development encroaches on previously mined areas, the potential of fatalities and serious injuries from abandoned mine shafts increases. The U.S. Bureau of Mines (USBM) has conducted research into cellular concrete as a material for sealing these openings. The current work involves testing the chracteristics of cellular concrete before and after it had been pumped or dropped from different heights into a simulated shaft. Cellular concrete was pumped vertically up to and subsequently dropped from heights of 18 m and 37 m into concrete forms. Wet density measurements were made at multiple sampling points in the test circuit. Air content determinations and uniaxial compressive strength testing was conducted. Research results showed significant loss in air content and changes in the characteristics of cellular concrete during pumping or dropping from various heights. Recommendations on effective use of cellular concrete for sealing abandoned mine shafts are made. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Keywords:
  Curing; Mechanical-properties; Mining-engineering; Sampling; Mines-excavations; Compressive-strength; Scanning-electron-microscopy; Density; Mine-shafts; Concretes; Abandoned-shafts; Cellular-concrete; Abandoned-mines
• Source:
  Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9539, 1995 Jan; :1-35
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  Colorado ; OSHA Region 8
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DRC - Denver Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  33 pdf pages
• NIOSHTIC Number:
  nn:20039203
• NTIS Accession Number:
  PB95-216636
• Federal Fiscal Year:
  1995
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:437a0bfd4f60ea87cad3bf377b55d33af47180b825a99108cd46520b204e70904f325c48f2321ec3d297ad551b629dbaada8b5d716785048c67dca22aef8b313
• Download URL:
  https://stacks.cdc.gov/view/cdc/10110/cdc_10110_DS1.pdf
• File Type:
  [PDF - 2.29 MB ]