Research Article
Apr 1972
Engineering Properties of Compacted Fly Ash
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VIEW THE REPLYAuthors: Donald H. Gray and Yen-Kuang Lin, AM.ASCEAuthor Affiliations
Publication: Journal of the Soil Mechanics and Foundations Division
Volume 98, Issue 4
Abstract
The lower compacted density of fly ash relative to conventional earthfill recommends its use when a fill or embankment must be constructed over soft, compressible ground. Field evidence to date indicates that compressibility or settlement of compacted fly ash fills is not significant. Long-term field settlements cannot be predicted satisfactorily on the basis of short-term laboratory tests because fly ash exhibits age-hardening or pozzolanic properties. Low-level additions of lime to the fly ash before compaction accentuate this behavior. Frost susceptibility likewise is not as serious a problem in compacted fly ash as might be presumed from its grain size distribution. Gradation alone does not suffice as a criterion of frost susceptibility; pozollanic properties also play an important role. Undesirable frost heave in compacted fly ash can be reduced to tolerable levels by addition of lime or cement.
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Published In
Journal of the Soil Mechanics and Foundations Division
Volume 98 • Issue 4 • April 1972
Pages: 361 - 380
Copyright
© 1972 American Society of Civil Engineers.
History
Published in print: Apr 1972
Published online: Feb 12, 2021
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Affiliations
Donald H. Gray
Assoc. Prof. of Civ. Engrg., Univ. of Michigan, Ann Arbor, Mich.
Yen-Kuang Lin, AM.ASCE
Proj. Engr., Soil and Materials Engineers, Inc., Detroit, Mich.
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