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An Investigation on the Effects of Adding Nano-Sio2 Particles and Silica Fume with Different Specific Surface Areas on the Physical and Mechanical Parameters of Soil-Cement Materials | ||
| Civil Engineering Infrastructures Journal | ||
| دوره 54، شماره 1، شهریور 2021، صفحه 93-109 اصل مقاله (567.8 K) | ||
| نوع مقاله: Research Papers | ||
| شناسه دیجیتال (DOI): 10.22059/ceij.2021.291231.1619 | ||
| نویسندگان | ||
| Milad Tajdini* 1؛ Mohammad Mahdi Bargi2؛ Omid Rasouli Ghahroudi3 | ||
| 1Ph.D., Civil Engineering Department, University of Tabriz, Tabriz, Iran | ||
| 21 Ms.C , Department of Civil Engineering, Tehran University, Tehran, Iran. | ||
| 32 Ms.C Student, Department of Civil Engineering, Shahed University, Tehran, Iran, | ||
| چکیده | ||
| 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 makes 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, unconfined compressive test and hydraulic conductivity. 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 matrix can improve the compressive strength and reduce permeability and speed hydration reactions in the matrix in presence of nano-SiO2 particles. | ||
| کلیدواژهها | ||
| Compaction Test؛ Hydraulic Conductivity؛ Nano-SiO2؛ Soil-ement؛ Uniaxial Compression Test | ||
| مراجع | ||
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