Experimental Study on the Mechanical Properties of Amorphous Metallic Fiber-Reinforced Concrete

Abstract

The purpose of this study is to investigate the characteristics of fresh concrete and the mechanical properties of hardened concrete with incorporation of amorphous metallic fiber into high strength concrete. Based on the experimental results, the slump decreases as the content of amorphous metallic fiber concrete increases, and it can be ensured that the optimum workability is obtained when 0.3% of concrete volume fraction in mixing is mixed regardless of the length of the steel fiber. In addition, the incorporation of amorphous metallic fiber has a limitation on the enhancement of compressive strength regardless of steel fiber content ratio, but tensile strength and flexural strength increase up to 2 times depending on the increase of the content ratio and length of the steel fiber. The bond stress increased with the increase of the content rate of the steel fiber, but it is considered that the optimum content ratio of amorphous metallic fiber is 0.3 % of volume fraction with regard to the workability and mechanical properties.

Effect of Amorphous Metallic Fibers on Strength and Drying Shrinkage of Mortars with Steel Slag Aggregate

“…Recently, research on cement composites reinforced with amorphous metallic fibers (AMFs) possessing excellent mechanical properties and corrosion resistance has been attracting significant attention [21][22][23][24][25]. AMFs are known to be effective in improving the mechanical properties of mortar and concrete [22,24] and reducing plastic shrinkage cracks in cement composites [25].…”

“…AMFs are known to be effective in improving the mechanical properties of mortar and concrete [22,24] and reducing plastic shrinkage cracks in cement composites [25]. Most existing studies employing AMFs [21][22][23][24] have 2 of 10 used natural aggregates, and studies on AMF-reinforced cement composites with steel slag aggregates are scarce. To our best knowledge, there has been no study that used a mixture of blast furnace slag aggregate and ferronickel slag aggregate.…”

Mechanical Properties of Window Frames Exposed to High Temperature (II)

“…구조부재의 온도상승 에 대한 기계적 성질의 변화와 해석의 경우 강재를 중심으로 한 내화설계에서 주로 활용되고 있으며, 성능기반 내화설계 의 실용화 기반 구축 역시 이러한 기초적 데이터를 확보하는 것에 주력하고 있다 (Kwon, 2007;Kim et al, 2018). 이에 따라, Lee and Kwon (2023)은 기초적 데이터를 DB화 하기 위한 목적으로 창호 프레임 재료의 열적 성질과 더불어 재질에 따른 프레임의 인장강도 저하에 관한 연구를 실시한 바 있다 (Lee and Kwon, 2023).…”