Study on Reasonable Feature of Compaction Loess with Air Porosities

Abstract:

The degree of compaction is usually used as the compaction quality and control indicator of backfill in practical project. However, as the degree of compaction is affected by various internal and external factors, its accuracy is difficult to guarantee. In this paper, compacted loess samples were prepared under different compaction energies by normal compaction method. The curves of compression coefficient and dry density, the compression coefficient and porosity of compaction loess samples under different compaction energy are analyzed while the water content is constant. The air porosities of compaction loess samples under different compaction energy and water content are calculated and summed up. The air porosity of compaction loess samples under different compaction energy is more stable than the degree of compaction when the water content is exactly equal to the optimum water content. The rationality of using air porosity as the loess compaction quality control indicator is discussed. It is proposed using air porosity as additional indicator of compaction quality control on the condition of the loess compacted dry density meeting the requirements. The air porosity less than 6.5% is suggested as the additional quality control indictor for region backfill compaction.

• Periodical: Applied Mechanics and Materials (Volume 238)
• Pages: 441-446
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.238.441
• Online since: November 2012
• Authors: Jing Yang, Ling Hao Wang, Fu Li Ma, Xiao Hong Bai
• Keywords: Air Porosity, Compaction Loess, Degree of Compaction, Dry Density, Water Content

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