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STAINLESS STEEL SLAG WASTE. FROM WASTE TO RAW MATERIAL FOR THE MANUFACTURE OF SELF-COMPACTING CONCRETE
Julia Rosales, Manuel Cabrera, Adela P. Galvín, Ester Quirós, Juan Almagro, Francisco Agrela
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Keywords: stainless steel slag waste, self-compacting concrete, treatments, mechanical behavior, durability 1. Introduction
The production of stainless steel is currently one of the most dynamic sectors of the manufacturing industry, due to a large increase in the use of this product. Considerable amounts of waste are generated from these factories (Huaiwei, 2011). This large amount of waste generated is not only a quantity crisis but also an environmental problem (Shen, 2004). The feasibility of using stainless steel slag waste (SW) as a substitute for cement (Rosales, 2017) has been demonstrated, improving the mechanical characteristics and demonstrating the feasibility of using the large amount of waste generated.
This study evaluates the cementing properties of stainless steel slag as a substitute for limy filler in self-compacting concretes (SCC). Based on other studies that analyze the use of industrial by- products for the production of recycled SCC (Felekoğlu, 2006). The limy filler was completely replaced with untreated slag and slag processed by crushing and calcination to evaluate its mechanical and durability properties.
2. Materials and methods
The present study evaluated three different SW processes, including unprocessed SW (SW-NP), crushing and sieving to obtain the fraction 0/125 μm (SW-C) and SW burned at a temperature of 800 ° C for 18 h ( SW-B) to evaluate the influence of SW as a substitute for the filling in self- compacting concrete. To make a comparison of results, a control mixture was added (CONTROL). The physical and chemical properties of SW were analyzed, as well as, a mechanical behavior and durability studies were performed.
Figure 1: Experimental program
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