X-ray CT Analysis of FNS Mortars Mixed with Converter Slag Fine Aggregate

Ji Seok Kim ,Won Jung Cho

doi:10.34257/gjsfrbvol21is1pg1

Abstract

Aggregate is an indispensable component in concrete occupying nearly 65-80% of the total volume, whose effects on concrete performance are rarely studied [1]. Due to their inert and impervious characteristics, the durability of concrete is also influenced by the quality of aggregates. To meet the global demand for concrete in the future, it is becoming a more challenging task to find suitable alternatives to natural aggregate for preparing concrete [2]. Hence, the use of alternative sources for natural aggregates is becoming increasingly important.

Highlights

Aggregate is an indispensable component in concrete occupying nearly 65-80% of the total volume, whose effects on concrete performance are rarely studied [1]
It can be seen that the BOF aggregate has similar oxide composition as shown in table 1 and figure 2, which contributed to the hydration reaction in the cement matrix which cement clinker has been reduced due to the replacement by ferronickel slag (FNS) incorporation
The FNS cement with BOF fine aggregate mortar was investigated by the chemical microscopic analysis (X-ray fluorescence, X-ray diffraction) and pores distribution including an examination of X-ray CT analysis

Summary

Introduction

Aggregate is an indispensable component in concrete occupying nearly 65-80% of the total volume, whose effects on concrete performance are rarely studied [1]. Due to their inert and impervious characteristics, the durability of concrete is influenced by the quality of aggregates. Steel slag is a vast majority of solid wastes produced as a by-product during the steelmaking process. It is reported that 2-4 tons of wastes are being generated per one ton of steel production [3]. The annual emission of steel slag in China is 101 million tons [4] while 43.43 million tons in Korea but its utilization is very low due to the soundness effect; 1) poor grindability, 2) lower reactivity, 3) bad stability of

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Conclusion