have many negative effects on the long-term properties of concrete, such as decreasing strength, increasing porosity and chloride penetrability, and decreasing carbonation and sulfate resistance. This study aims to relate the mixture parameters (nature of aggregate and volume of the fine grain) with the thermal characteristics of lightweight aggregate concrete in order to optimize the couple resistance / insulation. Four types of steel slags, a ladle slag, a BOF (basic oxygen furnace) slag and two different EAF (electric arc furnace) slags, were characterized and modified by semi-rapid cooling in crucibles and rapid cooling by water granulation. The flow mechanism was discussed in terms of a simple gravity and capillary/interfacial force analysis of the system. Tests were performed to assess properties such as occluded air, density, compressive strength, modulus of elasticity and gamma rays attenuation (μ). In this paper, the physical and chemical properties as well as the leaching properties of the stainless steel slag were summarized. Next, several mixes of concrete are designed in order to analyze their strength and properties. Synthetic coke was mainly used to minimise experimental uncertainty associated with the use of variable industrial coke and to allow control of the coke mineralogy. According to X-ray Diffraction, Scanning Electron Microscope (SEM) and other studies, the main phases identified in EAF and AOD include Fe–Cr–Ni alloys, Fe–Cr oxides, Ca–Mg–Al silicates and Ca–Mg oxides (free CaO and periclase) with many mineral species. Also, ternary blend mix showed higher resistance than binary blend specimens. Further facts and figures on LD slag: http://bit.ly/ld-slag. Each specimen was manufactured into 3 cm diameter with 5cm height in cylindrical mould. Therefore, today almost 65% of the total crude steel production in the world is met by using the BOF method. Disintegration of AOD stainless steel slag can be effectively controlled by adding borax, and the adding amount is only 0.5% – 0.8%. Optical microscopy, X-ray diffraction, scanning electron microscope and a standard test leaching (prEN 12457-2/3) have been used for the investigation. In the present paper, physicochemical and mineralogical properties of stainless steel slags oriented to metal recovery were studied by using various methods. Electric arc furnace (EAF) slag, a by-product of steelmaking recovered after the oxidizing process, is useful when employed as aggregate in hydraulic concrete and bituminous mixtures. Concrete containing composite mineral admixture with a high content of GGBS can achieve similar long-term strength, porosity, chloride penetrability, and carbonation and sulfate resistance to Portland cement concrete. The tests were designed to evaluate the internal expansivity of the slag, its chemical reactivity with some components of the cement and its resistance to environmental agents, ice and moisture. About this page. Both gave satisfactory burnability indexes (BI) and high percentages of replacement of limestone (up to 38%) and clay (up to 72%).EAF slag was introduced in the kiln feed at a lesser degree (20%), but promoted a better raw mix burnability: furthermore, being a non-carbonated source of lime, it allows a reduction of both thermal requirement and emission of CO2, gas responsible for the greenhouse effect.The manufacturing process of waste-based clinkers was environmentally compatible and the related cements were similar in performance to common hydraulic binders. Eventually the criterion (relationship) is established based on the free lime content, the specific gravity and bulk relative gravity of a specific steel slag sample. Stainless steel also helps offshore wind farms withstand the corrosive marine environment. It is well established that for simple capillarity-driven. In this research study, concretes were made with chemical foundry sand (QFS) and green foundry sand (GFS) as substitution for raw sand. In the C2 type, however, concrete strength and durability characteristics were better than those in the C1 type. Heavy work is carried out down to 1050°Cand a light finish is applied to the bottom of the range. the chromium distributions between slag and alloys, requires a knowledge of the activity-composition relations of chromium oxides as well as the phase relations in the slag. The use of industrial by-products and waste materials in concrete opens a whole new range of possibilities in the reuse of materials in the building industry. Influence of particle size on the carbonation of stainless steel slag for CO2 storage, Dust formation in Electric Arc Furnace: Birth of the particles, L'approche performantielle de la durabilité des bétons, Mechanism and Prevention of Disintegration of AOD Stainless Steel Slag, Effects of BOF steel slag and other cementitious materials on the rheological properties of self-compacting cement pastes, Béton de structure à propriétés d’isolation thermique améliorées : approche expérimentale, Radiological protection and mechanical properties of concretes with EAF steel slags, Properties of hydraulic paste of basic oxygen furnace slag, Characterization and activation of Basic Oxygen Furnace slag, Properties of concrete using metallurgical industrial by-products as aggregates, Properties of Blast-Furnace Slags Containing High Amounts of Manganese, Effect of Mechanical Activation on the Hydraulic Properties of Stainless Steel Slags, Chemical and mineralogical characterizations of LD converter steel slags: A multi-analytical techniques approach, Mechanical and durability characteristics of concrete containing EAF slag as aggregate, Bofy-fuzzy logic control for the basic oxygen furnace (BOF), Effect of coarse aggregate quality on the mechanical properties of high strength concrete, Physicochemical and Mineralogical Properties of Stainless Steel Slags Oriented to Metal Recovery, Interpretation of expansion curves of concrete subjected to accelerated alkali–aggregate reaction (AAR) tests, Comparison of properties of steel slag and crushed limestone aggregate concretes, The use of oil well-derived drilling waste and electric arc furnace slag as alternative raw materials in clinker production, Durability of concrete made with EAF slag as aggregate, Use of steel slag as a granular material: Volume expansion prediction and usability criteria, Products of Steelslags an Opportunity to Save Natural Resources, Characteristic of steel slag under different cooling conditions. Due to its positive technical characteristics, LD slag is used all over the world in road and railway construction and for engineering. The project aims to • understand the fundamental aspects of corrosion of aluminium, magnesium, stainless steel and mild steel in different cement systems, • identify the corrosion products at the metal/grout interface, • assess if the metal has any effects on phase formation in the bulk of cement matrix, • understand the factors that limit corrosion rates and assess whether the corrosion has any effects on cement durability over extended storage. Weaker aggregates tend to produce a more ductile concrete than stronger aggregates do. The type of coarse aggregate also influences the modulus of elasticity of concrete. Alternative 41 uses for these stainless steel slags could be applied. Slag is the glass-like by-product left over after a desired metal has been separated from its raw ore. Slag is usually a mixture of metal oxides and silicon dioxide. NGGBFS replaces 0 to 7 mm (0 to 0.276 in.) Pour ces cas, les courbes d'expansion ne sont vraisemblablement pas seulement dues à de l'alcali-réaction et la poursuite de l'expansion est probablement révélatrice d'un comportement gonflant que manifeste le béton, indépendamment de toute réaction pathologique, par le seul fait qu'il est placé dans une atmosphère saturée en humidité. The metals obtained are rich in Fe, Mn, V and Cr depending on the treated slag and residues. Chromium oxide containing slags have been investigated at temperatures corresponding to FeCr and stainless steel processes under different oxygen partial pressures ranging Furthermore, we study the variation of the thermal properties of lightweight aggregate concretes according to the temperature and to the moisture content. For instance, production of aggregates is carried out in accordance with the European Construction Product Directive and harmonized, European standards: LD slag has a series of advantages over natural rock in the field of road construction. Durability properties of the concretes were compared in order to study the possible advantages of different replacement ratios. These by-products were used as non-ground form in the concrete. As a global leading steel and technology group, the voestalpine AG Corporate Blog covers topics relating to innovation, mobility, energy, engagement, careers and events. Steel slag is a byproduct from either the conversion of iron to steel in a basic oxygen furnace, or the melting of scrap to make steel in an electric arc furnace. Finally, some leaching tests were carried out in order to verify their environmental compatibility. First, a suitable mortar must be made and tested. Due to its positive technical characteristics, LD slag is used all over the world in road and railway construction and for engineering. More ductile grades of steel are used for items that have to be molded into shape such as cookers, grills, sinks and saucepans. Strength and durability characteristics of concrete were compared with respect to control samples and vice versa. 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. The minimum (lowest) absorbable void volume is approximately 7.5%, which is unrelated to the free lime content. water is adjusted to obtain more homogenious diffusion and resolution in molten slag. 40 At present, both slags are generally treated as waste and dumped in landfills. This approach is more effective for these materials: the volume expansion of pastes cured in water is avoided and the compressive strengths are thus significantly improved. Slag is completely stabilized when the expansion capacity of the slag mortar bar does not exceed 0.052% after three hours of autoclave at 215.7 °C. Ferrochrome, or ferrochromium (FeCr) is a type of ferroalloy, that is, an alloy of chromium and iron, generally containing 50 to 70% chromium by weight.. Ferrochrome is produced by electric arc carbothermic reduction of chromite.Most of the global output is produced in South Africa, Kazakhstan and India, which have large domestic chromite resources.. Increasing amounts are coming from Russia and In contrast, natural rock becomes smooth with wear—its surface becomes polished and slippery. Fuzzy modeling and control in BOF promise a solution to the strongly non-linear problems associated with the process, which have so far proven extremely difficult to be solved by conventional control methods. This research study was conducted to evaluate the mechanical properties and durability characteristics of steel slag aggregate concrete in comparison with the crushed limestone stone aggregate concrete. Thus, it appears that lime content of LD steel slags is not the only parameter to explain their instability. Lightweight aggregates allow making concretes having mechanical properties answering to structural criteria and thermal insulation, improved with regard to the normal concrete. The most common use is as an aggregate in the manufacture of asphalt. Calcium silicate is present in β-C2S form which is the active polymorph present in clinker. To minimize the oxidation of chromium, the oxidation potential must be controlled and decreased along the lowering carbon content. In stages 1 and 2, slump test and compressive and tensile splitting strengths and modulus of elasticity were determined. This paper presents a hydration study of the BOF slag pastes preserved at different temperatures and in different environments. It uses a special multi-grind technology that sends your food waste through three different grind stages before it’s sent through your plumbing system. The solidification of a multicomponent stainless steel slag and dust composite has been studied by thermodynamic calculations using Factsage and analyses of samples using EPMA and Rietveld refinement of synchrotron X-ray powder diffraction after various cooling rates. At voestalpine the slags resulting from the steelmaking process are separated into blast furnace and metallurgical slags and then recycled. They mainly contain C2S, C2F, Fe1−xO, CaO, Ca(OH)2 and CaCO3. The energy sector uses high-grade stainless steel to construct valves, pipes, storage tanks and other vital components. Steel slags are generally rich in Ca and Mg which make them suitable for mineral carbonation. These phenomena comprise chemical reactions in liquid metal, slag, and gas phases and at their interfaces, heat effects, and fluid flow and mass transfer phenomena in different reaction zones as well as in the entire system. These use a combination of electrical and chemical energy to melt down alloyed high grade metal scrap. A usability criterion is then developed based on the volume expansion of steel slag (%) and the minimum percentage of the volume that can take the volume expansion of steel slag (%). Holds editorial responsibility for blog topics, is researching and writing articles. Mass change of all specimens was measured after removing detached particles gently. It is furthermore experimentally proved that certain volume expansion of steel slag can be absorbed internally by the void volume in bulk steel slag under external surcharge weight making the apparent volume expansion equal zero. It is possible to recover the former two but the Fe–Cr–Ni in the latter one will not be easy to recover by mechanical separation. Characteristics and Uses of Steel Slag in Building Construction focuses predominantly on the utilization of ferrous slag (blast furnace and steel slag) in building construction.. Stainless steel is used in the kitchen accessories, cutlery and cookware. But the adding amount must arrive at 15% which increases the difficulty of industrialization. This finding has important consequences for modelling the barrier performance of these materials and suggests that the results of measurements of absorption properties using water as the test liquid should be interpreted with caution. 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The properties of concrete, Ni seldom exists in the 1950s, first by applying oxygen top-blowing through and., X-ray diffraction and scanning electron microscope and a standard test leaching ( 12457-2/3... And as there is less wear, particulate pollution is reduced researching and writing articles for blog,. That lime content through mineral carbonation with barite aggregates this Cr is impossible to recover by mechanical separation the of. Useful in areas where good-quality aggregate is scarce traded as free to use by steel is...