ISSN: 1945-7545
CODEN: GTJODJ
Page Count: 5

Suggested Test Method for Determination of Degree of Saturation of Soil Samples by B Value Measurement

Chaney, RC
Associate professor of civil engineering, Lehigh University, Bethlehem, Pa.

Stevens, E
Senior soils technicians, Fugro, Inc., Long Beach, Calif.

Sheth, N
Senior soils technicians, Fugro, Inc., Long Beach, Calif.

Abstract

Three methods are proposed for using Skempton's B parameter for determining levels of soil saturation. In the first method, achievement of a specified B value is required before consolidation of the test specimen. In the second, achievement of a specified B value is required after consolidation of the test specimen. In the third method, the B value remains constant when plotted against increasing back pressure. The detrimental effect of performing a B value test on a partially saturated specimen is discussed, along with methods for increasing specimen saturation by flushing with carbon dioxide gas and increasing back pressure. Data are also presented on recommended B criteria as a function of soil type and saturation level, along with typical times required to flush samples.

Keywords:
soil tests, saturation, pore pressures, triaxial tests, laboratory tests

Paper ID: GTJ10448J
DOI: 10.1520/GTJ10448J
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