Hydraulic conductivity of compacted cement-stabilized fly ash

Michael E. Kalinski, Praveen K. Yerra

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

When combined with portland cement and compacted, fly ash is a high-strength material. In some instances, it may also be desirable to control the hydraulic conductivity (k) of the compacted mixture. Therefore, a study was performed to assess the effects of water content (w), cement content, curing time, and compaction effort on the hydraulic conductivity of compacted cement-stabilized fly ash. When compacting relatively dry mixtures (w < 20%), k is independent of compaction effort, and is on the order of 10-5 cm/s. When compacting between w of 20% and optimum water content (wopt), compaction effort affects k, and, at a given w, k decreases by about an order of magnitude when increasing from standard to modified proctor effort. When wet of wopt, k is on the order of 10-6 cm/s regardless of compaction effort or water content. With respect to curing time, extended curing time has relatively little effect on k within a 60-day time frame. Based on the results of this study, an approach to construction quality assurance testing can be applied to estimate k based on in situ measurement of dry density (ρd) and w.

Original languageEnglish
Pages (from-to)2330-2336
Number of pages7
JournalFuel
Volume85
Issue number16 SPEC. ISS.
DOIs
StatePublished - Nov 2006

Bibliographical note

Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.

Keywords

  • Compaction
  • Fly ash
  • Hydraulic conductivity

ASJC Scopus subject areas

  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

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