Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Effects of remote drop and pumpdown placement on cellular concrete.

Authors
Boreck-DL; Miller-RE
Source
Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9539, 1995 Jan; :1-35
Link
NIOSHTIC No.
20039203
Abstract
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.
Keywords
Curing; Mechanical-properties; Mining-engineering; Sampling; Mines-excavations; Compressive-strength; Scanning-electron-microscopy; Density; Mine-shafts; Concretes; Abandoned-shafts; Cellular-concrete; Abandoned-mines
Publication Date
19950101
Document Type
Report of Investigations
Fiscal Year
1995
NTIS Accession No.
PB95-216636
NTIS Price
A03
Identifying No.
RI-9539
NIOSH Division
DRC
Source Name
Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9539
State
CO
TOP