Effect of nanosilica content on mechanicalparameters of soil-cement

Soil cement is a mixture of Portland cement, soil and water, in which hydration of cementand compaction causes the materials’ constituents to bond together making a dense anddurable composition with low permeability and abrasion resistant. Since most of therecent researches are focused on the addition of nano-SiO۲ on concrete, in this paper ithas been attempted to use nano-SiO۲ particles in soil-cement and observe the effects.Due to the fact that in concrete there are no particles passing sieve ۲۰۰ and thisrestriction does not apply to soil-cements, some tests were carried out on the nano-SiO۲+ soil-cement matrix because of the meaningful difference between concrete and soilcement.The test procedure consists of unconfined compressive test and hydraulicconductivity. In these tests, silica fume, nano-SiO۲ were added to soil-cement. Theresults show that adding certain amounts of nano-SiO۲ particles to the soil-cementmatrix can improve the compressive strength and reduce permeability and speedhydration reactions in the matrix in presence of nano-SiO۲ particles

Keywords:

Nano-SiO۲ , Soil-ement , Compressive test , permeability