Compressive strength of cement-bound base layers containing ferrochromium slag

Abstract

In this study, the compressive strength properties of flexible pavement's cement-bound base layers made with FeCr slag have been investigated. The physical and chemical properties of the materials (FeCr slag and cementitious binders) were determined. Cylinder-shaped slag specimens containing 2%, 4%, 6%, 8%, and 10% Portland cement (PC) and silica fume were then prepared and stored for 28 days in a humid room. Nondestructive testing was performed using ultrasonic pulse velocity (UPV), and then unconfined compressive strength (UCS) testing was applied to the samples. The results of both testing methods are discussed comparatively. The test results showed that FeCr slag stabilized with cementitious binders can potentially be used as a road base layer material, in similar applications to traditional cement stabilized materials. Slag+PC mixtures met the required compressive strength properties of standards at 4% and higher PC contents. In this research, a high correlation was found between UCS and UPV test results. © TÜBITAK.