Experimental Investigation on Cementation of Calcareous Sand and Its Basic Mechanical Characteristics
钙质砂的胶结性及对力学性质影响的实验研究

Tri-axial experiment was carried out to study the basic mechanical properties of calcareous sand exploited from South China Sea. The attention was focused on the cementation effect of different materials on the mechanical properties, e.g., the effect of cementation materials content and type on the strength and stress-strain characteristics. Results show that the calcareous sand has many different properties from the terrigenous sand, such as its internal friction angle (48°) is much larger than that of terrigenous sand (35° approximately), and the dilatancy is obvious under low confined pressure but disappears gradually with the increase of confined pressure. Portland cement is a good cementation agent. The strength of calcareous sand increases with the increase of Portland cement content.