Soil Surface Compaction with a Foam-Type Explosive

by L. J. Goodman,
A. R. Aidun,
C. S. Grove, Jr.,

Serial Information: Journal of the Soil Mechanics and Foundations Division, 1965, Vol. 91, Issue 1, Pg. 143-168

Document Type: Journal Paper


A proposed new method for soil surface compaction based on the principle of pressure waves as a source of energy is described. This method, which has been termed the foamed propellant method for soil compaction, has a formulation containing hydrazine, ammonium perchlorate, and a foaming agent, hydrolized protein base foam liquid. The mechanics of this new compaction technique are relatively simple, with a blanket of the foamed propellant system placed on the surface of the soil to be compacted and then detonated. The results of using the foamed propellant system to compact loose cohesionless soils are presented and evaluated. This includes some preliminary investigation of the influence of both surface area and multiple detonation on compaction control parameters. The results of this investigation to date (1964) show conclusively that this new compaction is effective in increasing the density of the soil to depths of as much as 15 in. below the surface for sandy soils, sand-gravel mixtures, and predominantly silty soil containing little clay. Laboratory blast pressure measurements are also examined and presented.

Subject Headings: Compacted soils | Soil mixing | Sandy soils | Explosions | Soil pressure | Wave pressure | Cohesionless soils | Clays

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