Effect of Wet-Dry Cycles on the Geotechnical Properties of Stabilized Clayey Soil by Lime and Cement

آب و خاک

Article 8, Volume 27, Issue 5, November 2014, Pages 940-948   

Document Type: Research Article

DOI: 10.22067/jsw.v0i0.31257

Authors

J. Behmanesh; B. Mohammadnejad

Abstract

In most civil projects, such as irrigation and drainage networks constructions, soil stabilization has an important role. Achieving maximum durability against wet-dry cycles is one of the soil stabilization objects. Therefore, depend upon project type and its importance; various hydraulic binders with different amounts are tested to obtain desirable results from technical and economical view. In this research, the effect of dry-wet cycles on engineering properties of clayey soils (low plasticity) was studied and lime, cement and lime-cement binders, with (2-6) percent of soil weight, were used. The results showed that with changing type and percent of binders, various sample durability against dry-wet cycles is different so that without binder samples did not have durability and the samples stabilized by 4% cement and 4% lime tolerance 12 wet-dry cycles. The results also showed that after dry-wet cycles, the mass and volume of sample were changed and its unconfined compressive strength was decreased so that the decrease of the unconfined compressive strength was between 40% and 60%. The present study showed that dry-wet cycles significantly cause to change the soil geotechnical properties.

Keywords

Wetting-Dring; Cement; Lime; Unconfined compressive strength; durability