Improving the characteristics of sandy soil by using cement grout with Nano- materials

The effects of the permeation cement grout with Meta-kaolin on sandy soil skeleton was studied was this research on two phases. Phase no. (1) was the effect on shear strength parameters on the grouted soil. While phase no.(2) was the effect of these grouted materials on volume grouted zone by injecting (51) cm³ of slurry to sandy soil placed in a steel cylinder model as a small scale model (150 mm diameter X 300 mm height). The soil sample used in this study was a poorly graded sandy soil (SP according to USCS) obtained from Karbala city. Soil samples were tested using different water cement ratio (w:c); (0.9:0.1, 0.8:0.2, and 0.7:0.3 respectively), a dehydration and curing of one day was given to the grouted samples before testing them. Also in this research, Metakaolin was applied as a filler to replace the cement material in percentages of (5%, 10% and 15%) by weight. Results showed that the increase in soil shear parameter is inversely proportional to the water – cement ratio. While Metakaoline material added to the mix required an increase in water percentage to obtain better shear results.