Title:
Electric Arc Furnace Slag as Concrete Coarse Aggregateon Fiber Reinforced Semi-Light Weight Concrete
Author(s):
Penet
Publication:
Web Session
Volume:
ws_S24_Penet.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
3/23/2024
Abstract:
This research evaluates the feasibility of using electric arc furnace (EAF) slag as concrete coarse aggregate. EAF slag is a byproduct of steel recycling. Unlike blast furnace slag, which is useful as a supplementary cementitious material, EAF slag is considered a waste product which steel recyclers must pay to dispose of. EAF slag has the potential to be used as a substitute coarse aggregate in asphalt and concrete, saving recyclers money and potentially improving the properties of the concrete. In order to be considered a suitable coarse aggregate, both physical and expansive qualities of the slag and concrete containing slag aggregate must be analyzed. In order to evaluate the feasibility of using EAF slag as concrete coarse aggregate, this study measured the physical and mechanical properties of the slag and concrete containing slag aggregate. The expansive properties of pure and blended aggregates were measured using a variety of methods. The results suggest that EAF slag does not exhibit levels of expansion that are detrimental to the performance of the concrete. The compressive strength, modulus of elasticity, and flexural strength of slag aggregate concrete were also measured. Slag aggregate had little influence on compressive strength but resulted in a significant reduction in modulus of elasticity and a minor increase in flexural strength. While concrete with such properties may not be best suited for structural applications, concrete pavements can benefit from the additional flexibility. Overall, these results suggest that slag aggregate concrete can have both economic and engineering benefits.