Title : Effects of loading ratio on the compression characteristics of south china sea calcareous sand

Page : PP.41-45

Author(s) : Yang Shen, Hua-Yang Ge, Han-Long Liu, and Xue Shen

Keyword : Calcareous sand, loading ratio, compression characteristics, particle shape analysis, particle breakage

Abstract : 

China has been carrying out hydraulic fill projects of coral reefs in the South China Sea. Calcareous sand is the main material of hydraulic fill ground. Based on 1-D compression tests on calcareous sand under different loading ratios, this paper analyses the effects of loading ratio on the compression characteristics and particle breakage of calcareous sand, and explains the effect mechanism combined with particle shape analysis of calcareous sand. The results show that calcareous sand particles have richer angles and more irregular shapes than quartz sand particles, and their shape characteristics are markedly different at three perpendicular directions; the increase of loading ratio leads to the increase of compressibility and particle breakage; calcareous sand particles break evidently when the axial stress reaches 400 kPa. The above conclusions have reference value for the treatment of hydraulic fill ground and settlement calculation in practical engineering.

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