Evaluation of Ponded Ash as a Sustainable Backfill Material
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 8
Abstract
The main aim of this research is to evaluate the applicability of ponded ash in the production of backfill material. Many experiments were conducted to analyze both fresh and hardened characteristics of backfill material developed from various ponded ash–sand ratio, cement, and air foam contents. Then, the behavior of the material in the actual field experiment was investigated through light falling weight deflectometer and excavation tests. All mixtures yielded excellent flowability performance, ranging from 200 to 250 mm. The compressive strength was found to increase as ponded ash and cement contents increased, but the strength decreased with an increase in air-foam content or number of freeze–thaw cycles. From the actual on-site experiment results, it is feasible to use up to 100% ponded ash in the backfill material as an economical alternative to the compacted granular fill.
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Acknowledgments
This research was conducted by the Research Fund of Korea Western Power Plant. The authors express their gratitude to the Korea Western Power Plant.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 8 • August 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Oct 20, 2017
Accepted: Jan 30, 2018
Published online: May 21, 2018
Published in print: Aug 1, 2018
Discussion open until: Oct 21, 2018
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