Accession Number : AD0473861

Title :   GROUTING SUPPORT,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

Personal Author(s) : Polatty, James M. ; McDonald, James E. ; Sugiuchi, Howard

Report Date : 15 NOV 1965

Pagination or Media Count : 36

Abstract : In the Flat Top 1 event, 20 tons of high explosive, stacked in a spherical shape with the centroid at the ground surface, was detonated at the U. S. Atomic Energy Commission's Nevada Test Site (NTS). The primary purpose of this project was to study cratering and ground-shock phenomena of a detonation in hard rock. A visual postshot examination of the crater and surrounding area indicated that the instruments were well embedded in grout, that good bond to instruments was obtained, and that grouting and concreting operations appeared to be successful. An additional grout was also developed which was required to match the shock impedance of the limestone in order to couple the energy of the high explosives to the formation. The Hugoniot equation of state of this grout was determined at the explosives test site of WES at Jackson, Mississippi. This grout was placed about the high explosive stack, and although the impedance was lower than required, and effective energy coupling appeared to have been achieved. (Author)

Descriptors :   *EXPLOSION EFFECTS), (*CEMENTS, SURFACE BURST, CRATERING, DETONATION WAVES, PHYSICAL PROPERTIES, LIMESTONE, CONCRETE, EQUATIONS OF STATE, ACOUSTIC IMPEDANCE.

Distribution Statement : APPROVED FOR PUBLIC RELEASE