Effect of surface-treated energy optimized furnace steel slag as coarse aggregate in the performance of concrete under corrosive environment
TL;DR: In this article, the surface of EOF steel slag was treated with fly ash: cement slurry coating to improve the corrosion resistance of steel slags concrete, and the results showed that the effect of the surface modification enhanced the corrosion resilience by taking longer times to reach high corrosion potentials.
About: This article is published in Construction and Building Materials.The article was published on 2021-05-17. It has received 19 citations till now. The article focuses on the topics: Slag & Corrosion.
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TL;DR: In this article , the potential of steel slag as an adsorbent for removing pollutants in water was reviewed, and the results demonstrated that steel slags can be used for removing inorganic nonmetallic ions (e.g., phosphate, nitrogen, etc.), heavy metal ions, organic dyes and other pollutants from wastewater.
Abstract: Steel slag refers to solid waste with high specific surface area and large porosity that is discharged from the crude steel smelting process in steel mills. The concentration of heavy metal ions leached from the steel slag fulfils many industry criteria and is extremely safe, suggesting that it may be employed as a new form of low-cost adsorbent for removing pollutants from water. This paper reviews the potential of steel slag as an adsorbent for removing pollutants in water; the results demonstrate that steel slag can be used for removing inorganic non-metallic ions (e.g., phosphate, nitrogen, etc.), heavy metal ions, organic dyes and other pollutants from wastewater. In addition, the effect of modified steel slag and reconstituted steel slag in removing pollutants were explored to address problems such as limited adsorption efficiency owing to the limitations of steel slag characteristics. To better clarify the relationship between the use of steel slag in removing pollutants from water, the removal mechanism and influencing factors were analyzed; the results demonstrated that factors such as solution pH, temperature, and steel slag characteristics affect the pollutant removal efficiency. Analyzed from the perspective of economic benefits, environmental benefits, and safety applications, the use of steel slag for removing pollutants in water not only utilizes solid waste resources safely but also treats wastewater, thereby indicating future large-scale applications of steel slag in water treatment engineering.
18 citations
TL;DR: In this paper , a steel slag aggregate concrete filled-in fiber-reinforced polymer (FRP) tube (SSACFFT) is proposed for concrete aggregate concrete applications.
12 citations
TL;DR: In this paper , the influence of steel slag as partial replacement of cement on the mechanical properties and impermeability of cement-based materials under constraint conditions was evaluated, and the results showed that, compared with the raw steel slags, the setting time of the wet-grinding steel-slag system is shortened and the free expansion rate is increased.
12 citations
TL;DR: In this article , the authors compared the treatment effects of cement paste (CP), silane coupling agent (SCA), polyvinyl alcohol (PVA) and epoxy acrylic organic-silicone resin (EAOR) on the surface of steel slag.
10 citations
TL;DR: In this paper , the effect of steel slag coarse aggregate on the service life of concrete was investigated under different mass fractions of sulfate solution and the deterioration laws of performance indexes such as compressive strength, mass change, and relative dynamic elastic modulus were investigated.
7 citations
References
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TL;DR: Investigation of the possibility of adding steel slag, a by-product of the conversion of iron to steel process, in the raw meal for the production of Portland cement clinker showed that it did not negatively affect the quality of the produced cement.
461 citations
TL;DR: In this paper, a two-stage crushing process was utilized to produce recycled aggregate (RA) and the slump of concrete mixes prepared by technique of stone enveloped with pozzolanic powder (SEPP) was compared with those using normal mixing approach (NMA) or stone enveloping with portland cement (SEPC) approach.
273 citations
TL;DR: In this article, the influence of steel slag on the compressive strength, drying shrinkage, permeability to chloride, and carbonation resistance of concrete was investigated under two different conditions: constant W/B and constant 28-days' Compressive Strength.
209 citations
TL;DR: In this article, the authors investigate the possibility of replacing natural aggregates of traditional concrete with EAF slag and investigate the performance of concrete made with this slag as aggregate according to the ideal grading curve.
Abstract: The present study aims to investigate the opportunity to largely substitute natural aggregates of traditional concrete with Black/Oxidizing Electric Arc Furnace (EAF) slag. Compressive and tensile strength, elastic modulus and durability characteristics (accelerated aging, freezing and thawing, wetting and drying) of concrete containing EAF slag as aggregate according to Fuller’s ideal grading curve were experimentally investigated. This study aims to improve the scarce database of mechanical and durability tests on this type of concrete and give some insights to improve durability properties of concrete made with EAF slag, not only using modern agents and additives, but also working on the actual grading curve of aggregates used, closely connected to the overall durability for any kind of concrete. Concrete made with EAF slag as aggregate showed good strength characteristics since, in normal environmental conditions, strength properties of the conglomerate containing EAF slag are totally comparable (or even better) than those observed for traditional concrete. Conversely, the typical chemical and physical properties of EAF slag, such as the high content in calcium and magnesium oxides inclined to hydration, may be a limit for the durability of the resulting concrete: on one hand the durability can be strongly improved even in critical freezing/thawing environmental conditions by a small amount of air-entraining agent, on the other hand, this conglomerate still remains rather vulnerable to repeated cycles of wetting and drying.
209 citations
TL;DR: In this article, the effect of coarse aggregate on the compressive, flexural and splitting tensile strength on concrete produced at different strength levels was investigated using basalt, limestone and gravel coarse aggregates.
185 citations