An evaluation of fly ash-overburden rock mixtures for a cover layer to prevent acid mine drainage generation in overburden dump

G. J. Kusuma, H. Shimada, R. S. Gautama, K. Matsui, C. H. Saputra

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

1 被引用数 (Scopus)

抄録

Utilizing the fly ash (FA) for environmental applications, such as for hazardous waste barrier materials, is one of the common alternative of FA utilization due to its several advantages, both on the chemical and the geotechnical view. However, the FA has a range variety of characteristics and tend to be site specific which depends on the coal source quality and the coal burning condition. Hence, an evaluation of the geotechnical properties of FA is needed to be conducted prior to its utilization in a specific application such as an additional mixture material in a barrier material to encapsulate the sulfide containing rock in an overburden dump, in which the stability and the integrity of the dump are the main issues that have to be maintained from a geotechnical point of view. The objectives of this research are to (i) characterize the engineering properties of FA and two types of overburden rock as well as its several mixture compositions; (ii) evaluate the properties of the FA-overburden mixtures as a barrier material candidate; and (iii) determine the most appropriate composition of material mixtures that provides a high degree of confidence in achieving an acceptable design criterion as a barrier layer. In order to address these objectives, several laboratory tests such as the consistency limit test, compaction test, and hydraulic conductivity test have been done on several compositions of FA-overburden rock mixture as well as the oxygen diffusion potency. The study concludes; is was that the 10 % w/w content of the FA in the material mixture is the maximum FA addition to achieve the recommended properties of the material mixture for an encapsulation purpose of the sulfide-containing overburden rock.

本文言語英語
ホスト出版物のタイトルISRM International Symposium - 8th Asian Rock Mechanics Symposium, ARMS 2014
編集者 Kaneko, Kodama, Shimizu
出版社International Society for Rock Mechanics
ページ1532-1539
ページ数8
ISBN(電子版)9784907430030
出版ステータス出版済み - 1 1 2014
イベント8th Asian Rock Mechanics Symposium, ARMS 2014 - Sapporo, 日本
継続期間: 10 14 201410 16 2014

出版物シリーズ

名前ISRM International Symposium - 8th Asian Rock Mechanics Symposium, ARMS 2014

その他

その他8th Asian Rock Mechanics Symposium, ARMS 2014
Country日本
CitySapporo
Period10/14/1410/16/14

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

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