CONCRETE COMPOSITION CONTAINING CEMENT-FREE BINDER COMPRISING BLAST FURNACE SLAG AND BOTTOM ASH, RAIL TIE USING SAME, AND METHOD FOR MANUFACTURING SAME

摘要

The present invention relates to a concrete composition using bottom ash and blast furnace slag as a cement-free binder, a rail tie using same, and a method for manufacturing same, and more specifically, provided is a concrete composition in which cement is completely substituted by mixing low-strength bottom ash with appropriate ratios of blast furnace slag, alkaline minerals and sodium silicate, inducing polymerization therein via an activator and thus attaining strength and usability. Rail ties made with such a concrete composition are environment-friendly and are high strength, allowing a compressive strength of 60MPa or higher.