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Title:

DYNAMIC CHARACTERIZATION OF CEMENT-TREATED BASE AND SUBBASE MATERIALS

Accession Number:

00455839

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309039223

Abstract:

In recent years, the resilient modulus has been introduced for evaluating pavement material response. A comprehensive laboratory evaluation of resilient modulus, Mr, of five cement-treated base (subbase) materials used by the Maryland State Highway Administration are presented in this paper. A total of 84 specimens, having factorial mix combinations of material type, gradation, cement content, density level, and curing period, were used to investigate their influence on the Mr response. In addition, the static modulus test was performed on each specimen to determine its static modulus, E, as well as the unconfined compressive strength, qu. It has been found that the cement content, material type, and gradation are the major influence on modulus response. The water needed for cement hydration, as well as the optimum moisture content needed for maximum density, were found to affect the results. The resilient modulus becomes more independent on repeated axial deviator stress when the cement content and/or curing period increase. The test results suggest that different relationships between resilient modulus and unconfined strength exist for the cement-treated dense-graded aggregate (DGA) and soil cement materials. Separate equations were therefore developed and presented. For design of flexible pavements, new layer coefficient-resilient modulus nomographs were developed. As for rigid pavement, a more precise evaluation of the composite modulus of subgrade reaction is presented.

Supplemental Notes:

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.

Monograph Accession #:

01419428

Authors:

Lotfi, Hani A
Witczak, Matthew W

Editors:

Withers, Julia

Pagination:

pp 41-48

Publication Date:

1985

Serial:

Transportation Research Record

Issue Number: 1031
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309039223

Media Type:

Print

Features:

Figures (6) ; References (6) ; Tables (4)

Old TRIS Terms:

Subject Areas:

Geotechnology; Highways; I42: Soil Mechanics

Files:

TRIS, TRB

Created Date:

May 31 1986 12:00AM

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