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자료유형
학술저널
저자정보
저널정보
대한토목학회 KSCE JOURNAL OF CIVIL ENGINEERING KSCE JOURNAL OF CIVIL ENGINEERING Vol.10 No.2
발행연도
2006.3
수록면
73 - 80 (8page)

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Coal fly and bottom ash are granular by-products of coal-burning for power generation. Either fly ash or bottom ash separately was frequently reused in construction (e.g., structural fills etc.). This paper describes an investigation on the compression and collapse behaviors of non-cementitious fly ash and fly/bottom ash mixtures. A series of single oedometer tests was conducted on compacted fly and bottom ash mixture samples with fly ash contents of 50%, 75%, and 100%, sampled from two Indiana power plants in US. Both soaked and as-compacted samples in different water contents were tested to examine the effects of the fly/bottom ash mixture ratio and compaction water content. Also, collapse potential of ash mixtures was measured at a vertical stress of 100 ㎪. Test results revealed that morphological dissimilarity of ashes with natural soils affects their compression behavior to varying degrees. As fly ash content decreased from 100% to 50%, fly/bottom ash mixtures became slightly more compressible primarily due to crushing occurred in weak bottom ash particles. Breakage of fly ash agglomerates also greatly contributed to deformations. Infiltrated water caused the fabric of compacted ash to become unstable, resulting in deformations under a constant vertical stress. The measured collapse potentials of compacted ash mixtures, which increased with increasing bottom ash content, ranged from 1.0% to 2.2%, falling into the "slightly collapsible range in the classification of collapse potential (ASTM D 5333).

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Abstract
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
References

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