Strength properties and durability of control low strength material from alkaline activation by high-calcium fly ash and steel slag

Abstract

Abstract

                Presently, the construction materials have been continuously developed in quality for reducing the limitation or improving the material properties. For example, the industrial waste has been utilized as construction materials to reduce the use of natural resources. Cementless binder for construction materials has been developed for environmental sustainability.  Therefore, this paper aims to study the control low strength materials (CLSM) mixtures produced from fly ash (FA) and bottom ash (BA) collected from the Mae Moh power plant, and electric arc furnace slag (EAFs) acquired from the steel industry. An alkaline activator chosen is sodium hydroxide (NaOH). The mixture sodium hydroxide solution of 6 and 10 molar, the ratio of BA to the binder of 1.5 and the ratio of EAFs to the binder of 0, 10, 20, and 30 and the ratio of sodium hydroxide solution to binder 0.015 in determining the properties of control low strength materials refer to document ACI229R-99 and construction structure subbase of the Department of Highways of Thailand. Experimental outcomes on fresh and hardened properties composed of slum flow, unconfine compressive strength (UCS) and durability. Finally, in this research, the optimal wages of control low strength materials are presented for use as pavement materials.