Applications of rejected fly ash in stabilization and solidification processes

Chi Sun Poon, X. C. Qiao, C. R. Cheeseman

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Cement-based stabilization/solidification (S/S) systems with partial replacement of cement by pulverized fuel ash (PFA) have been widely used to minimize leaching of contaminants from hazardous wastes prior to land disposal. Traditionally, low-grade PFA (rFA) from the ash classifying process is largely rejected and unused due to its high carbon content and large particle size. This paper presents experimental results of a study on the applications of rFA in the cement-based S/S of a synthetic heavy metal waste. Results were compared to mixes containing the classified and finer ash (fFA). The compressive strength results show that cement-based waste forms with rFA replacement are suitable for disposal at landfill. The leaching test results indicate that rFA can be used in cement-based S/S wastes without compromising the performance of the S/S product and the long-term performance of cement-rFA waste form can be better than the cement-fFA waste form.
Original languageEnglish
Title of host publicationStabilisation/Solidification Treatment and Remediation
Subtitle of host publicationAdvances in S/S for Waste and Contaminated Land - Proceedings of the Int. Conf. on Stabilisation/Solidification Treatment and Remediation
Pages63-68
Number of pages6
Publication statusPublished - 1 Dec 2005
EventInternational Conference on Stabilisation/Solidification Treatment and Remediation - Advances in S/S for Waste and Contaminated Land - Cambridge, United Kingdom
Duration: 12 Apr 200513 Apr 2005

Conference

ConferenceInternational Conference on Stabilisation/Solidification Treatment and Remediation - Advances in S/S for Waste and Contaminated Land
CountryUnited Kingdom
CityCambridge
Period12/04/0513/04/05

ASJC Scopus subject areas

  • Waste Management and Disposal

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