SEDL / STP / STP886-EB / STP36378S

Test Methods for Injectable Barriers

Malone, PG
Geologists, Geotechnical Laboratory, U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS

Larson, RJ
Geologists, Geotechnical Laboratory, U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS

May, JH
Geologists, Geotechnical Laboratory, U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS

Boa, JA
Geologist, Structures Laboratory, U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS

Pages: 12    Published: Jan 1985

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Abstract

Grouts are becoming increasingly important in producing barriers to contaminated groundwater flow at hazardous waste sites. Grouted barriers can be used at depths and under conditions where slurry trenches are impractical. To employ grouts to advantage at waste sites it is necessary to select materials that solidify or gel in the presence of industrial waste compounds that may be present. Grouts must additionally be unaffected by aggressive chemical wastes and create impermeable barriers when injected into permeable units.

A wide variety of test procedures have been employed in bench and pilot-scale evaluation of grouts. Many testing systems do not duplicate field conditions closely enough to be useful. A standard approach using gelling time determinations, static chemical durability testing, and permeability determinations on cores of grouted material is suggested.