LAUSR

ABSTRACT The stiffness of stabilized sand with powder nanomaterials (nano-SiO2, nano-Al2O3, and nano-MgO) in two cementation conditions is investigated in this study. The studies have been conducted using laboratory tests under unconfined, partly confined, and confined conditions. The nanomaterials in addition to filling the intergranular pore spaces have led to a better interlocking of the particles by improving the concentration on the surface roughness of them in an effective way. Therefore, they have increased the intergranular friction, resisted the movements of the particles, and reduced the deformation of the mass. In the cemented case, nanomaterials have generally participated in the hydrated medium of the cementitious matrix. In addition, pozzolanic materials have reduced the weak part of the hydration process and improved the strong part of it, by consuming calcium hydroxide and producing C-S-H. Subsequently, it has resulted in a reduction of axial and volumetric deformation of the specimens..