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Title:

UNCONFINED COMPRESSIVE STRENGTH OF VARIOUS CEMENT-STABILIZED PHOSPHOGYPSUM MIXES

Accession Number:

00646078

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309055717

Abstract:

The unconfined compressive strength of various cement-stabilized phosphogypsum mixes is described. The mixes vary in compacted dry unit weight, moisture content, cement type and content, and curing procedure and time. It is shown that the mixes behave similarly to cement-stabilized soil. The strength increases with increases in dry unit weight, cement content, and curing period. Strength decreases with increasing compaction moisture content and with a soaked curing regime. The strengths exceed a typical minimum specified unconfined compressive strength (1.7 MPa at 7 days) only at modified Proctor compacted densities (at 4% cement) and more than 14% at standard Proctor compaction level. A limited study of the effects of adding sand, hydrated lime, and calcium chloride showed that sand and small additions of calcium chloride increase the 7-day strength. Lime was ineffective. The use of constant volume molds was also shown to be effective in allowing direct control of unit weight and moisture content in compacted specimens.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1424, Environmental Issues Related to Materials and 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

Monograph Accession #:

01398725

Language:

English

Authors:

Ong, S
Metcalf, J B
Seals, R K
Taha, R

Pagination:

p. 20-24

Publication Date:

1993

Serial:

Transportation Research Record

Issue Number: 1424
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309055717

Features:

Figures (7) ; References (13) ; Tables (3)

Old TRIS Terms:

Subject Areas:

Geotechnology; Highways; Materials; I35: Miscellaneous Materials

Files:

TRIS, TRB

Created Date:

Apr 13 1994 12:00AM

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