Volume Change Behavior of Fly Ash-Stabilized Clays

This paper presents, by way of comparison, the effect of fly ash on the volume change of two different types of clay, one a highly plastic expansive clay and the other a nonexpansive clay, also of high plasticity. Expansive clays swell on absorbing water and shrink on drying. Nonexpansive clays undergo large compression at high water contents. The effect of fly ash content on free swell index, swell potential, and swelling pressure of expansive clays was studied. Compression index and secondary consolidation characteristics of both expansive and nonexpansive clays were also determined. Swell potential and swelling pressure, when determined at constant dry unit weight of the sample (mixture), decreased by nearly 50% and, when determined at constant weight of clay, increased by nearly 60% at 20% fly ash content. Compression index and coefficient of secondary consolidation of both the clays decreased by 40% at 20% fly ash content.

Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/08991561
Authors:
- Phanikumar, B R
- Sharma, Radhey S
Publication Date: 2007-1

Language

English

Media Info

Media Type: Print
Features: Figures; References; Tables;
Pagination: pp 67-74
Serial:
- Journal of Materials in Civil Engineering
- Volume: 19
- Issue Number: 1
- Publisher: American Society of Civil Engineers
- ISSN: 0899-1561
- EISSN: 1943-5533
- Serial URL: http://ascelibrary.org/journal/jmcee7

Subject/Index Terms

TRT Terms: Absorption; Ash content; Clay soils; Compression; Drying; Expansive clays; Fly ash; Materials by weight; Moisture content; Plastic soils; Plasticity; Pressure; Soil aggregates; Soil consolidation test; Stabilized materials; Swelling; Swelling soils; Volume changes
Uncontrolled Terms: Compression index
Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

Accession Number: 01042767
Record Type: Publication
Files: TRIS
Created Date: Feb 19 2007 10:16AM