Accession Number : AD0266509

Title :   SOIL STABILIZATION. INVESTIGATIONS OF PHOSPHORUS PENTOXIDE AS A SOIL-STABILIZING MATERIAL

Descriptive Note : Technical rept.

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : KOZAN,G.R.

Report Date : NOV 1960

Pagination or Media Count : 36

Abstract : Laboratory and field tests were made of a phosphoric acid anhydride (P2O5) that would utilize available water in the soil, convert to the acid, and proceed with a stabilizing reaction. Initial laboratory tests revealed that 5% P2O5 plus 0.5% sodium fluosilicate was capable of increasing the compressive strength of a lean clay soil (soil A) from 24 to 165 psi after 24-hr curing and to nearly 400 psi after 3-day curing. Laboratory tests conducted on a similar soil (soil B) concurrently being used to construct the field test section showed the same stabilizer system used in the initial laboratory tests to be relatively ineffective for soil B. Analysis of soil B revealed the presence of concretions of calcium carbonate, which were not present in soil A. Traffic tests showed that the stabilized soil B surface was unable to withstand the intended traffic without failure as defined by specific criteria established for stabilized-soil surfaces. (Author)

Descriptors :   *CLAY, *SOILS, ADDITIVES, FLUORIDES, OXIDES, PHOSPHORUS COMPOUNDS, SILICATES, SODIUM COMPOUNDS, STABILIZATION, TRAFFICABILITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE