00670364

Component

http://onlinepubs.trb.org...trr/1994/1440/1440-007.pdf

https://scholar.google.co...kham&publication_year=1994

Long-term performance of flexible pavements located on cement-treated soils and the longevity of soil-cement subgrades are examined at sections of four highway routes. Ages of the soil-cement subgrades range from 6 to 30 years. Field and laboratory studies were conducted at each section. Generally, the soil-cement subgrades were non-plastic and were classified as SM, or sandy silt, according to the Unified Soil Classification System, although the classification of the untreated soil subgrades located below the treated layers ranged from CL (clay) to GC (clayey gravel). Plasticity index of the untreated soils ranged from non-plastic to 44%. Generally, the untreated soils were moderately plastic. In situ bearing ratios of the soil-cement subgrades were generally very large. Based on a percentile test curve, the in situ bearing ratios of the cement-treated subgrades at the 90th and 50th percent test values were about 24 and 90, respectively. Based on overlay histories of the routes, flexible pavements located on the soil-cement subgrades have performed well. In the older sections, overlays had been constructed every 11 to 14 years. Use of cement to construct stabilized subgrades represents a good design alternative when compared with other stabilizing methods and other design alternatives.

This paper appears in Transportation Research Record No. 1440, Design and Performance of Stabilized Bases, and Lime and Fly Ash Stabilization. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01401273

English

p. 45-52

1994

Transportation Research Record

Figures (13) ; References (5) ; Tables (4)

Cement treated soils; Field tests; Flexible pavements; Laboratory tests; Pavement performance; Plasticity index; Soil cement; Subgrade (Pavements); Time duration

Long term

Geotechnology; Highways; I42: Soil Mechanics

TRIS, TRB

Nov 30 1994 12:00AM

• CEMENT-STABILIZED OPEN-GRADED BASE STRENGTH TESTING AND FIELD PERFORMANCE VERSUS CEMENT CONTENT
• DEEP-SLOPE STABILIZATION USING LIME PILES
• DRAINED SHEAR STRENGTH OF LIME-CLAY MIXES
• ESTIMATING THE DESIGN LIFE OF A PROTOTYPE CEMENT-STABILIZED PHOSPHOGYPSUM PAVEMENT
• FIELD PERFORMANCE EVALUATION OF CEMENT-TREATED BASES WITH AND WITHOUT FLY ASH
• HIGH-STRENGTH STABILIZED BASE THICKNESS DESIGN PROCEDURE
• LIME AND FLY ASH ADMIXTURE IMPROVEMENT OF TROPICAL HAWAIIAN SOILS
• PERFORMANCE EVALUATION OF A CEMENT-STABILIZED FLY ASH BASE
• SELECTION OF DESIGN STRENGTHS OF UNTREATED SOIL SUBGRADES AND SUBGRADES TREATED WITH CEMENT AND HYDRATED LIME