A Study on the Applicability of Bio-Sulfur as a Cement Admixture

Abstract

A large amount of bio-sulfur is generated during the process of refining landfill gas generated from landfills in metropolitan areas in Korea. Sulfurized concrete offers the advantages of reducing the amounts of CO2 generated, typically in large quantities, during the cement manufacturing process and accommodating a large amount of bio-sulfur generated during the process of refining landfill gas in the form of concrete, with a sulfur-modified binder replacing the commonly used cement paste. In this study, the potential of bio-sulfur as an additive was assessed by analyzing the compressive strength, sulfuric acid resistance, and hydration product generation metrics of cement manufactured using bio-sulfur as a cement additive. It was concluded as a result of the analysis that, when using bio-sulfur mixed into cement composites, if the addition is less than 2% a strength improvement is unlikely. In addition, it is suggested that it is necessary to closely review and analyze the economic feasibility and commercialization potential through research on prototype production with concrete producers.