ROCK FRACTURE RESEARCH SURFACTANTS
In order to reduce the resistance of hard rocks to excavation by available cutters, and in order to reduce wear on cutters and thus to increase the efficiency of conventional tunneling machines and thus improve their rate of advance in hard rocks, surface active agents have been studied in controlled laboratory environments and have been experimented with in the field in actual tunneling operations. The laboratory study utilized a notched beam test to measure the effectiveness of thirty different surface active agents on the amount of surface energy required to cause stable fracture in rock specimens. In addition to the type of rocks, geometry of the specimens, type of surface active agents, the effect of environment such as temperature and degree of saturations were studied.
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Corporate Authors:
Massachusetts Institute of Technology
Department of Civil Engineering, 77 Massachusetts Avenue
Cambridge, MA United States 02139 -
Authors:
- McGarry, F J
- Moavenzadeh, F
- Publication Date: 1973-1
Media Info
- Media Type: Digital/other
- Pagination: 49 p.
Subject/Index Terms
- TRT Terms: Rock excavation; Rock fracture; Rocks; Surface active agents; Tunneling
- Old TRIS Terms: Hard rock excavation; Rock tunneling
- Subject Areas: Bridges and other structures; Geotechnology; Railroads;
Filing Info
- Accession Number: 00054329
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: FRA-RT-73-22 Final Rpt
- Contract Numbers: DOT-C-85-65
- Files: TRIS
- Created Date: Jun 10 1974 12:00AM