Effect of Plasticity Index on Compaction Test of the Nano-Soil-Cement

Milad Tajdini¹ Maryam Dorfaki² Soheil Esmaili Dorani³

1) 1. Ph.D. Geotechnical Engineering, e-mail
2) 2. Bs.C. Islamic Azad University Roodehen.
3) 3. Ms.C. Islamic Azad University Sciences and Researches branch

Publication : 2nd International Congress on Civil Engineering, Architecture, Building Materials and Environment(caucong.com/2nd)
Abstract :
Soil cement is a mixture of Portland cement, soil and water, in which hydration of cement and compaction causes the materials’ constituents to bond together making a dense and durable composition with low permeability and abrasion resistant. Since most of the recent researches are focused on the addition of nano-SiO2 on concrete, in this paper it has been attempted to use nano-SiO2 particles in soil-cement and observe the effects. Due to the fact that in concrete there are no particles passing sieve 200 and this restriction does not apply to soil-cements, some tests were carried out on the nano-SiO2 + soil-cement matrix because of the meaningful difference between concrete and soil-cement. The test procedure consists of moisture-dry density. In these tests, silica fume (with specific surface area of 21 m2/g), nano-SiO2 (with specific surface area of 200 and 380 m2/g) were added to soil-cement. The results show that adding certain amounts of nano-SiO2 particles to the soil-cement with low plasticity index matrix can improve the compaction of soil cement.
Keywords : Key words: Soil-cement Plasticity Index Compaction Test Nano-SiO2.