Selective dissolution and cementitious property evaluation of converter steel slag

• Published in: Materials and structures Vol. 46; no. 1-2; pp. 327 - 336
• Main Authors: Li, Zaibo, Zhao, Sanyin, Zhao, Xuguang, He, Tusheng, Yan, Meifeng
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.01.2013; Springer; Springer Nature B.V
• Subjects: Aggregates and other concrete constituents; Applied sciences; Building construction; Building Materials; Buildings. Public works; Cement concrete constituents; Cements; Civil Engineering; Compressive strength; Concrete additives (fillers, pozzolanic and hydraulic materials); Dissolution; Engineering; Exact sciences and technology; Iron and steel making; Machines; Manufacturing; Materials; Materials Science; Mortars; Original Article; Processes; Slags; Solid Mechanics; Steel converters; Structural steels; Theoretical and Applied Mechanics; Utilization; Dissolution; Steel slag; Cementitious property evaluation; Scanning electron microscopy; Mineralogy; Steel; Experimental study; X ray diffraction; Composite material; Cement; Properties of materials; Chemical composition; Blast furnace slag
• ISSN: 1359-5997; 1871-6873
• DOI: 10.1617/s11527-012-9904-4

High-efficiency recovery and utilization of steel slag are important concerns for environmental protection and sustainable development. To establish a method for rapid evaluation of cementitious property of steel slag, selective dissolution tests of converter steel slag were performed in a compound solution consisting of acetone, salicylic acid, and methanol. Feasible experimental conditions, repeatability and mechanism, were investigated. The relationship between selective dissolution behavior and cementitious property (represented as mortar compressive strength) was analyzed. The compound solution selectively dissolved calcium silicate minerals in steel slag satisfactorily and most of the mass fraction of (CaO + SiO 2 ) to the total dissolved matter from steel slag is as high as 94 to 98 %. The dissolution experiment had good repeatability. A significant linear relationship between the mass percentage of the dissolved matter from steel slag and the mortar compressive strength increment of the cementitious material prepared from reference cement and steel slag was observed. The linear correlation coefficient was more than 0.99. Therefore, selective dissolution in a compound solution can be used for rapidly predicting the cementitious property of converter steel slag.