Effect of permeation grouting with nano-materials on shear strength of sandy soil: An experimental study

Nano-materials have been widely accepted for many purposes as improvement materials several engineering projects. In this research, an attempt was made to study the effect of using two types Nano-materials, namely: Nano-SiO2 and Nano-clay, investigate mechanical properties soil improved with aid permeation grouting technique. Three different ratios Nano-materials/ water (1/30, 1/50, 1/100) were grouted at low pressure in form gel-like solid into sample, this, a sample sandy size (60x60x20) mm treated tested standard direct shear apparatus. The results indicated that increased strength parameters due gel probably strong interfacial bond between soil. From results, angle internal friction from 30.5° 33.50° 38.29° after 48 hrs. curing time compared untreated sand Nano/water percent 1/30 1/50 Nano-Clay Nano-SiO2, separately. ). viscous occupies voids soils, contributing increase regard, composite is related created particles. contrast, same ratio will cohesion 0 21 kPa 15 instance Nano-materials. Although Nan-clay cause interlocking intra-particle friction, change low, added Nano Clay occurs result enhance. also involved scanning electron microscope (SEM) X-Ray analyses base knowledge comparing distribution investigating microstructural alterations. Finally, improve associated no environmental problem price similar some geotechnical aspects such existing foundation or pile susceptibility liquefaction.