Investigation into the short-term behavior of silty sand stabilized with colloidal silica

Document Type : Article

Authors

Department of Civil Engineering, Babol Noshirvani University of Technology, Babol, IRAN

Abstract

Injection in soils using traditional materials, such as cement grout, has its inherent problems and has not shown the potential for further development in industrial applications. Accordingly, application of novel materials for injection in soils with considerable content of fines for stabilizing and even making them impermeable is suggested. Among different stabilizers that are injectable in soils with fine, colloidal silica seems very suitable due to its very low viscosity, nontoxicity in the nature, and adjustability of the setting time for slow injection in soils with fine. Based on laboratory tests performed in this research, the effect of colloidal silica on the strength parameters and the short-term behaviour of silty sand was examined. For characterizing the soil stabilized by colloidal silica, the silty sand samples with different silt values, in both unstabilized and stabilized conditions, were prepared with different concentrations of the stabilizer. 45 Uniaxial tests and 75 unconsolidated- undrained compressional triaxial tests were conducted. An increase in the undrained cohesion of all samples was observed. On the other hand, two different trends were observed in the alteration of the undrained internal friction angle of soils with low and high fines content.

Keywords

Main Subjects

References

References:
1. Koerner, R.M., Construction and Geotechnical Methods in Foundation Engineering, McGraw-Hill Book Company (1985).
2. Guyer, J.P., An Introduction to Soil Grouting, Course No. C02-017, Continuing Education and Development Inc. (2009).
3. Towhata, I., Geotechnical Earthquake Engineering, pp. 625-630, Springer, Verlag Berlin Heidelberg (2008).
4. Persoff, P., Moridis, G., and Whang, J.M. "Effect of dilution and contaminants on sand grouted with colloidal silica", Journal of Geotechnical and Geoenviromental Engineering, ASCE, 125(6), pp. 461-469 (1999).
5. Gallagher, P.M. and Mitchel, J.K. "Influence of colloidal silica grout on liquefaction potential and cyclic undrained behavior of loos sand", Soil Dynamic and Earthquake Engineering, 22(9), pp. 1017-1026 (2002).
6. Diaz-Rodriguez, J.A., Antonio-Izarraras, V.M., Bandini, P., and Lopez-Molina, J.A. "Cyclic strength of a natural liquefiable sand stabilized with colloidal silica grout", Canadian Geotechnical Journal, 45, pp. 1345- 1355 (2008).
7. Gallagher, P.M. and Lin, Y. "Colloidal silica transport through liquefiable porous media", Journal of Geotechnical and Geoenviromental Engineering, ASCE, 135(11), pp. 1702-1712 (2009).
8. Gallagher, P.M., Pamuk, A., and Abdoun, T. "Stabilization of liquefiable soils using colloidal silica grout", Journal of Materials in Civil Engineering, ASCE, 19(1), pp. 33-40 (2007).
9. Conlee, C.T., Gallagher, P.M., Boulanger, R.W., and Kamai, R. "Centrifuge modeling for liquefaction mitigation using colloidal silica stabilizer", Journal of Geotechnical and Geoenviromental Engineering, ASCE, 138(11), pp. 1334-1345 (2012).
10. ASTM D-4253, Standard Test Methods for Maximum Index Density and Unit Weight of Soils Using a Vibratory Table, Annual Book of ASTM Standards, USA (2016).
11. ASTM D-4254, Standard Test Methods for Minimum Index Density and Unit Weight of Soils and Calculation of Relative Density, Annual Book of ASTM Standards, USA (2016).
12. ASTM D-698, Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort, Annual Book of ASTM Standards, USA (2012).
13. Liao, H.J., Huang, C.C., and Chao, B.S. "liquefaction resistance of colloid silica grouted sand", Proceeding of Grouting and Ground Treatment, ASCE, pp. 1305- 1313 (2003).
14. ASTM D-2166, Standard Test Methods for Unconfined Compressive Strength of Cohesive Soil, Annual Book of ASTM Standards, USA (2016).
15. ASTM D-2850, Standard Test Method for Unconsolidated-Undrained Triaxial Compression Test on Cohesive Soils, Annual Book of ASTM Standards, USA (2015).
16. Yamamuro, J.A., Wood, F.M., and Lade, P.V. "Effect of depositional method on the moicrostructure of silty sand", Canadian Geotechnical Journal, 45, pp. 1538- 1555 (2008).
17. Lade, P.V. and Overton, D.D. "Cementation effects in frictional materials", Journal of Geotechnical Engineering, 115(10), pp. 1373-1387 (1989).
Scientia Iranica
Volume 26, Issue 3
Transactions on Civil Engineering (A)
May and June 2019
Pages 1206-1213

Files

Share

How to cite

Statistics