Soil Strength Recovery Using a Clegg Impact Device

by Bernard D. Alkire, Michigan Technological Univ, Houghton, MI, USA,
Lori Winters, Michigan Technological Univ, Houghton, MI, USA,

Document Type: Proceeding Paper

Part of: Cold Regions Engineering


The research described in this paper uses the Clegg Impact Device to determine the relative strength of a soil, and describes how this information can be used to develop the strength recovery curve associates with spring thaw. Field tests include Clegg Impact Values (CIV) taken at a test section on an aggregate-surfaced road. Readings were taken through two spring thaw-recovery cycles. Field CIV are correlated to laboratory values of CIV and California Bearing Ratio (CBR). Results indicate that field CIV produce a strength-recovery curve that can be used to make decisions related to trafficability.

Subject Headings: Soil strength | Impact tests | Field tests | Strength of materials | Material tests | Soil tests | Curvature

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