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http://dx.doi.org/10.14190/JRCR.2019.7.4.413

A Feasibility Study on the Application of Ferrosilicon By-Product in Concrete to Replace Silica Fume  

Kim, Hansol (Department of Civil and Environmental System Engineering, Hanyang University)
Cho, Won Jung (Department of Civil and Environmental System Engineering, Hanyang University)
Ann, Ki Yong (Department of Civil and Environmental Engineering, Hanyang University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.7, no.4, 2019 , pp. 413-422 More about this Journal
Abstract
A ferrosilicon (FS) by-product was applied into a cementitious binder in concrete substituting the ordinary Portland cement (OPC). The original material characteristic of FS is very identical to silica fume (SF) regarding chemical composition and physical properties such as specific surface area and specific gravity. Therefore, the FS and SF concrete or mortal of which 10% of the material was replaced to total binder weight were fabricated to evaluate the feasibility of using F S as a binder, and the comparative information of OPC, FS and SF concrete was given. The hydration characteristic of FS concrete was analyzed using X-ray diffraction analysis. The FS concrete was beneficial in compressive strength, resistivity against chloride ingress and reducing porosity considering performance of OPC concrete but the advantage was less than using SF. A possibility of alkali-silica expansion was found out from the FS concrete due to the agglomerated size of the silica particles.
Keywords
Ferrosilicon slag; Siliceous binder; Durability; Strength development; Chloride penetration;
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