Study on the influence of selected factors on the compressive strength of cement deep mixing soil by laboratory experiments

Abstract

This paper presents the results of laboratory experimental research to evaluate the effects of the water/cement ratio (W/C of 1.0 and 2.0), cement type (Fico PCB40 - Type II and Insee PCB40 - Type II) and cement content (200, 220, 250 kg/m3) on the compressive strength of cement deep mixing (CDM) soil. The tested soil samples belong to three types: Silty sand, clayey silt and clay. The experiments were conducted at 14-day and 28-day curing ages. The results indicate that compressive strength tends to increase with higher cement content and develops rapidly in the early stages. At 14 days, the compressive strength reached approximately 75 - 85% of the 28- day strength. These findings serve as a basis for selecting optimal mix parameters for deep cement mixing construction in the project, ensuring foundation stabilization quality and efficiency.

Keywords: Soil, cement, type, ratio, compressive strength.