Polyurethane Foamed Plastics in Soil Grouting

by Ted S. Vinson, Soils Engr.; Kaiser Engrs., Oakland, CA,
James K. Mitchell, Prof. of Civ. Engrg.; Univ. of California, Berkeley, CA,

Serial Information: Journal of the Soil Mechanics and Foundations Division, 1972, Vol. 98, Issue 6, Pg. 579-602

Document Type: Journal Paper


Significant strengthening and the impermeabilization of both dry and saturated granular soils have been effected following injection of polyurethane foamed plastic systems. Six systems were developed satisfying seven criteria established to measure stabilizer suitability. They were injected into both dry and saturated sand masses, and unconfined compressive strength and permeability tests were performed on the resultant stabilized samples. Comparison of the results of tests on air-dry cured samples to those for samples cured under water allowed an evaluation of the water sensitivity of a particular system to be made. In the case of injection into an initially dry sand, cylinders cored from a large stabilized sphere had unconfined compressive strengths in excess of 6,000 psi and were impermeable. Cylinders cored from a large stabilized sphere formed by injecting a saturated soil mass had unconfined compressive strengths in excess of 1,400 psi and permeabilities of 10-6 cm/sec.

Subject Headings: Soil strength | Soil compression | Saturated soils | Soil grouting | Permeability (soil) | Compressive strength | Soil stabilization | Polyurethane

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