—This paper presents an effective way of utilizing the ground granulated blast furnace slag (GGBFS), which is a by-product of the steel manufacturing process with lime for stabilization of road materials. In the study Ankara clay was used for stabilization. Although slag–lime and clay mixtures do not affect optimum water contents of clay significantly, they decrease dry density and smoothes Proctor curve. Then, the soil transforms into a rapid structure and the modulus of elasticity increases. When the results of the experiments were evaluated, unconfined compressive strength (UCS) and soaked California Bearing Ratio (CBR) values of the soils have shown significant increases. These increases reach to 46 times in CBR values for Ankara clay compared to natural case in 28 day-cured samples. This stabilization technique is more effective than the lime alone and also the slag will prevent the ettringite formation that occurs in lime stabilization with sulfate rich soils that leads swelling behaviour. And finally the slag may turn from a waste material into a valuable product for road construction works with huge volumes even at far away from the steel factories.
—Clay, lime, slag, stabilization.
A. Kavak is with the Department of Civil Engineering, Kocaeli University, Kocaeli, Turkey (e-mail: firstname.lastname@example.org).
G. Bilgenwas with Alaplı Vocational School, Bulent Ecevit University, Zonguldak, Turkey (e-mail: email@example.com).
Cite: A. Kavak and G. Bilgen, "Reuse of Ground Granulated Blast Furnace Slag (GGBFS) in Lime Stabilized Embankment Materials," International Journal of Engineering and Technology vol. 8, no. 1, pp. 11-14, 2016.