Abstract
Recently, with increasingly stringent environmental regulations and the depletion of natural aggregate resources, high-quality aggregates have become scarce. Therefore, significant efforts have been devoted by the construction industry to improve the quality of concrete and achieve sustainable development by utilizing industrial by-products and developing alternative aggregates. In this study, we use amorphous metallic fibers (AMFs) to enhance the performance of mortar with steel slag aggregate. Testing revealed that the 28-day compressive strength of the sample with steel slag aggregate and AMFs was in the range of 48.7–50.8 MPa, which was equivalent to or higher than that of the control sample (48.7 MPa). The AMFs had a remarkable effect on improving the tensile strength of the mortar regardless of the use of natural aggregates. With AMFs, the drying shrinkage reduction rate of the sample with 100% steel slag aggregate was relatively higher than that of the sample with 50% natural fine aggregate. Furthermore, the difference in the drying shrinkage with respect to the amount of AMFs was insignificant. The findings can contribute to sustainable development in the construction industry.
Highlights
amorphous metallic fibers (AMFs) to enhance the performance of mortar with slag aggregate, the aim of contributing to the of mortar with the steel slag aggregate, with the aim of contributing to the aforementioned aforementioned of mortar sustainable with the steel slag aggregate, with the aim of contributing to thetensile aforementioned efforts efforts in in sustainable development
For the N50 mixtures, when the amount of AMFs is increased by 10 kg/m, the mortar flow decreases by approximately 5.5–9.9%
Tensile thethe flexural of thethe mortar increases with increasing amount ofamount strength, the flexural strength of the mortar increases with increasing amount of AMFs
Summary
With the increasing stringency of various environmental regulations and the depletion of natural aggregate resources, the availability of high-quality aggregates is on the decline. A representative steel slag, has been widely used as an admixture material or a substitute for aggregates in the concrete industry; ferronickel slag, a by-product of the nickel industry, has not been utilized as much [12,13,14,15]. Sarker et al [19] used ferronickel slag as a substitute for natural sand (NS), and reported an enhancement in the fluidity and compressive strength of mortar at a replacement rate of 50% or less. In the thissteel study, we used suchwith a mixture and AMFs to enhance the performance of mortar with slag aggregate, the aim of contributing to the of mortar with the steel slag aggregate, with the aim of contributing to the aforementioned aforementioned of mortar sustainable with the steel slag aggregate, with the aim of contributing to thetensile aforementioned efforts efforts in in sustainable development.
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