Replacement of Conventional Base Course with Stabilized Lateritic Soil Using Ground Granulated Blast Furnace Slag and Alkali Solution in the Flexible Pavement Construction

摘要: The use of cement/chemical-treated base and sub-bases is widely recommended in the pavement construction. Therefore, this paper investigates behaviour stabilized lateritic soil as a course flexible by replacing granular course. was with 25% Ground Granulated Blast Furnace Slag (GGBFS) along alkali solutions such sodium hydroxide silicate at varying oxide (Na2O) contents 4, 5 6%, silica modulus (Ms, ratio to oxide) 0.5, 1.0 1.5 constant water binder (w/b) 0.25. maximum compressive strengths 5452 6593 kPa were achieved for treated sample consisting 6% Na2O Ms cured 28 days light heavy compactions, respectively, which due formation calcium hydrates when oxide-rich GGBFS reacts water. Further curing period results an increase strength alumino-silicate solutions. durability samples evaluated wetting–drying freezing–thawing tests. passing required criteria tested flexural fatigue life. Scanning electron microscope images showed closely packed crystal orientation indicating high strength. Low volume pavements designed using course, strains analysis software. It suggested that conventional layer can be replaced soil.