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does steel slag react with alkali

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does steel slag react with alkali

Characterisation of alkali-activated stainless steel slag and …

In the current study, electric arc furnace stainless steel slag (EAFSS) as a potential precursor in the production of alkali activated materials (AAMs) is investigated, …

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Investigating accelerated carbonation for alkali activated slag

Portland cement as a commonly used material in soil stabilization projects, releases considerable amounts of CO2 into the atmosphere, highlighting the need to use green binders such as ground granulated blast furnace slag as a substitute for cement. On the other side, extensive research is being conducted on accelerated carbonation …

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Slag Basicity: What Does It Mean? | SpringerLink

Lewis provided an alternative definition of an acid in 1932, as an electron-pair acceptor. In this definition, reaction (3) involves the oxygen atom in H 3 O + accepting an electron pair in reaction with a base compound (electron donor). Bronsted and Lowry's definition is what is generally used in chemistry today, but the term "Lewis acid" is …

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Study on the performance and reaction mechanism of alkali …

DOI: 10.1016/j.conbuildmat.2023.134406 Corpus ID: 266063617; Study on the performance and reaction mechanism of alkali-activated clay brick with steel slag and fly ash @article{Liu2024StudyOT, title={Study on the performance and reaction mechanism of alkali-activated clay brick with steel slag and fly ash}, author={YunXiao Liu and Fan …

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Solution

Atmospheric CO₂ rapidly reacts with steel slag rich in Ca/Mg Hydroxide, producing permanent carbonate minerals. Measurement, Reporting, and Verification (MRV) is at the core of what Alkali Earth does in directly …

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Study on the performance and reaction mechanism of alkali …

This study aims to enhance the utilization of clay bricks by maximizing the application of clay brick (CB) powder. The amount of CB was set at 50% and different percentages of steel slag (SS) powder and fly ash (FA) are added. A CB-SS-FA ternary hybrid geopolymer was prepared through alkali activation, and its performance and …

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Effect of Steel Slag on Hydration Kinetics and Rheological …

The effects of steel slag (SS) and fly ash (FA) on hydration heat, fluidity, setting time and rheological properties of alkali-activated slag (AAS) pastes with different silicate modulus (Ms) values were comparatively investigated. The results show that the incorporation of SS shortens the induction period, increases the cumulative hydration …

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Influence of slag composition on the stability of steel in alkali

One promising approach is based on aluminosilicate raw materials such as blast furnace slag derived from the iron making process, which can be reacted with an …

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Properties of alkali-activated ground granulated blast furnace slag

Thus, depending on the type of furnace, steel slag can be broadly classified into three categories, i.e., BOF steel slag, EAF steel slag, and LF steel slag [33]. As for steel slag in alkali ...

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Buildings | Free Full-Text | Feasibility of Preparing Steel Slag…

The mass loss is only 1.1% and the frost resistance reaches the F300 level. Li et al. compared the durability of alkali-activated steel slag material with Portland cement and found that the frost resistance of alkali-activated steel slag cementitious materials was better than that of Portland cement. The compressive strength loss rate and mass ...

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Effect of an alkali activators on the compressive strength and reaction …

Incorporating steel slag into the alkali-activated fly ash system effectively enhances the compressive strength of ATC. This is attributed to the C 2 S and C 3 S in steel slag participating in the formation of C-(N)-A-S-H gel products, improving the porosity and microstructure of ATC. Furthermore, ATC exhibits excellent compressive strength ...

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Mechanical Strengths of Alkali-Activated Blast Furnace Slag …

In this paper, the influence of water glass types, the modulus of water glass, the alkali content, the water consumption, and plant fibers on the mechanical strengths of alkali-activated blast furnace slag powder (BFS) is investigated. Moreover, the fiber types and pretreatment on the plant fibers and the measuring temperature on the performance …

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Reactions of Main Group Elements with Halogens

All the alkali metals react vigorously with halogens to produce salts, the most industrially important of which are NaCl and KCl. [ 2Na(s) + Cl_2(g) rightarrow 2NaCl(s) nonumber ] Sodium Chloride is used as a preservative for meat and to melt the ice on the roads (via freezing point depression ).

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Alkali Activation of Metallurgical Slags: Reactivity, Chemical …

In the present study, the electric arc furnace carbon or stainless steel slag (EAF) and secondary metallurgical slag such as ladle furnace basic slag (LS) were used as precursors in an alkali-activation process. EAF slag, with its amorphous fraction of about 56%, presented higher contents of soluble Si and Al species with respect to ladle slag ...

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Reaction characteristics of steelmaking slag carbonation in …

Steelmaking slag carbonation mineralization is an effective method for CO2 in-situ fixation. The rate of steelmaking slag carbonation process could be enhanced by adding alkali medium with low ...

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Factors Affecting Kinetics and Gel Composition of Alkali…

Alkali activation of metallurgical slags produces low-carbon cementitious binders for sustainable concrete production. However, the potential deleterious reaction of internal alkalis in alkali-activated slag (AAS) with siliceous aggregates is a serious durability concern. In this work, the alkali–silica reaction (ASR) in alkali-activated …

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Mechanical properties and durability of alkali-activated steel …

Alkali-activated cement (AAC) is either clinker-less or free, and it is also environmentally friendly due to its low carbon footprint and wide range sources. …

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Fly Ash and Granulated Blast Furnace Slag to Mitigate the Alkali …

The alkali silica reaction (ASR) is a pathological manifestation of chemical origin and high gravity that can negatively affect the mechanical properties and durability of important concrete structures, even with short time in service. ... the attack of sulfates and corrosion of steel. The effectiveness of slag in the ASR mitigation has been ...

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Effect of slag chemistry on the hydration of alkali-activated …

This paper presents results of detailed investigations about the alkaline activation of ground granulated blast furnace slags whose chemical composition were modified. Sodium hydroxide and potassium silicates were used as alkaline activators. The influence of the CaO/SiO2 ratio, the Al2O3 and TiO2 content of the slag composition on …

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How does carbonation of alkali-activated slag and Portland …

The AAS and OPC mortars were prepared using a commercial GGBS and an ASTM C150 Type I OPC. The mixtures of AAS were designed with the same 5 % equivalent sodium oxide (Na 2 O) to slag mass, water-to-slag mass ratio of 0.40, and sand-to-paste mass ratio of 1.5, as shown in Table 1.To explore the effect of activator type on …

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Steel slag for carbon fixation and synthesis of alkali-activated

In this work, steel slag is utilized for carbon fixation and the obtained carbonated steel slag (CSS) was creatively adopted as solid precursor for the synthesis of alkali-activated materials (AAMs).

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Pretreatment of alkali activation and carbonation of steel …

Steel slag (SS) exhibits low hydration activities and expansive phases, which should be pretreated prior to using as binding materials. Thus, these properties of …

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Buildings | Free Full-Text | Compressive Strength and …

Alkali-activated materials (AAMs) are favoured for their low carbon emissions, excellent mechanical properties, and excellent chemical resistance. In this paper, ternary alkali-activated cementitious materials were prepared from slag, steel slag, and lithium slag to investigate their strength and resistance to sulphate attack. A series …

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Investigations on Alkali-Activated Slag/Fly Ash Concrete with steel

The present investigation is conducted to evaluate the effect of steel slag coarse aggregates on mechanical properties and fatigue behaviour of Alkali-Activated Slag Fly Ash Concrete (AASFC) mixes. AASFC mixes were prepared with steel slag coarse aggregates by replacing natural coarse aggregates at various replacement levels (0, 25, …

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Alkali Activation of Metallurgical Slags: Reactivity, Chemical …

In the present study, the electric arc furnace carbon or stainless steel slag (EAF) and secondary metallurgical slag such as ladle furnace basic slag (LS) were …

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Reaction Kinetics and Fresh State Properties of Alkali-Activated Slag

In this study, the effects of the incorporation of various supplementary materials such as fly ash, limestone powder, silica fume, and portland cement as the secondary precursor on the early age reaction, structural buildup, rheology, and microstructure of alkali-activated slag cements (AAC) in the presence of two different …

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Alkali Metals: Elements in the First Column of the …

Alkali metals react vigorously to water and air.These elements will dance around, sizzling due to the production of hydrogen gas, and often explode. They get more reactive the further down on the …

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Alteration in molecular structure of alkali activated slag with …

Recently, Zhang et al. studied the effect of the w/b ratio on the carbonation of alkali activated slag/fly ash and found that a decrease in the w/b ratio can reduce the formation rate of Ca ...

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Pretreatment of alkali activation and carbonation of steel slag …

(7) was only used in the case of alkali excitation reaction of steel slag. (7) C ‐ S ‐ H (wt. %) = 100 ‐ ∑ (W cryst.) 2.3.3. Heat flow calorimetry. A TAM AIR 8-channel isothermal calorimeter (TA Instruments, USA) was utilized to record the heat flow and the cumulative heat release during the hydration process of SS-cement systems.

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Alkali-aggregate reaction in concrete: A review of basic …

This study is focused on alkali-silica reaction (ASR), a chemical process that can cause significant damage to concrete structures. It occurs when alkali hydroxides in the concrete react with ...

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