BEHAVIOR OF STABILIZED SOILS UNDER REPEATED LOADING. REPORT I. BACKGROUND, EQUIPMENT, PRELIMINARY INVESTIGATIONS, REPEATED COMPRESSION AND FLEXURE TESTS ON CEMENT-TREATED SILTY CLAY
CALIFORNIA UNIV BERKELEY DEPT OF CIVIL ENGINEERING
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Current methods of pavement design using stabilized soils as components of the pavement structure generally base selection of both quality and thickness of those materials on static tests such as the CBR procedure. To validate such procedures, the objectives of these studies are to evaluate the behavior of stabilized soils under dynamic loading conditions and develop improved criteria for quality design and thickness selection within a more rational framework. More specifically the study is concerned with examination of soil stabilization requirements established by the Corps of Engineers for military roads and airfields in the theater of operations within this framework. Two soils, Vicksburg Silty Clay and Vicksburg Buckshot Clay, were selected for study because of the considerable performance data on these soils and because, through suitable treatment, they fall within the range of stabilization requirements of the Corps. To date, most of the dynamic testing has been performed on the treated silty clay. In general the results obtained thus far indicate that cement-treated soil designed to meet Corps criteria for CBR and compressive strength can withstand repeated compressive and flexural stresses of the magnitude and number prescribed for different classes of military operations. However, more detailed investigation of the influence of water content, mixing procedures, and method of compaction are required since the data obtained show that these variables significantly affect the strength and resilience characteristics of the cement-treated silty clay.
- Soil Mechanics
- Civil Engineering