The characteristics of internal and accumulated pores of calcareous sand

Abstract

Calcareous sand is characterized by irregular shapes and high porosity, which makes its engineering properties more special. Based on the calcareous sand from a reef island in the South China Sea, the characteristics of the internal pores and the accumulated pores between the calcareous sand particles were explored by a microscopic system and image analysis techniques. The results show that for calcareous sand particles with different particle sizes, the distributions of internal pores and accumulated pores follow the exponential distribution. The probability distribution of internal pores is the same as that of accumulated pores, and the area of accumulated pores between particles is about 100 times that of internal pores of particle itself. The characteristics of accumulated pores are affected by the size and shape of the particles.