Effects of remote drop and pumpdown placement on cellular concrete
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Help
Clear All

Query Builder

Query box

Help
Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Effects of remote drop and pumpdown placement on cellular concrete

Filetype[PDF-2.29 MB]


  • English
    • Details You May Also Like

    Details:

    • Personal Author:
    • Corporate Authors:
      United States. Bureau of Mines.
    • 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." - NIOSHTIC-2

      NIOSH no. 20039203

    • Series:
      Report of investigations (United States. Bureau of Mines) ; 9539.
    • Document Type:
      Report
    • Collection(s):
    • Main Document Checksum:
    • Download URL:
    • File Type:

    Supporting Files

    • No Additional Files

    More +

    You May Also Like

    Checkout today's featured content at stacks.cdc.gov