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What Machines Can Enhance The Activity Of Water Slag
Hydration and mechanical properties of cement-steel slag system
Based on the outcome of different analytical techniques, it is observed that alkaline activators can facilitate disintegration of steel slag’s vitreous structure and can 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 Mechanism, application, influencing factors and environmental
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Effect and Mechanism of Acetic Acid to Improve the Hydration
Alkali activation is the most common way to enhance the hydration properties of solid wastes, including steel slag.5It can not only recycle solid wastes but also reduce the Abstract. Electrochemical water splitting has been regarded as a promising technique for facilitating the conversion of sustainable energy. To realize the Increasing the active sites and intrinsic activity of
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Structural advantages and enhancement strategies of
Typical synthetic strategies, such as design of nanostructure, chemical doping, and heterostructure-based hybrids synthesis, are discussed, and their This review summarizes the strategies to enhance the efficiency of the noble-metal-free materials towards water splitting. The implemented strategies are An account of the strategies to enhance the water
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Characteristics of alkali-activated slag powder mixing with
Effects of seawater on the properties of alkali-activated slag powder were studied. • Hydration kinetics of alkali-activated slag powder with seawater was analyzed. The experimental results demonstrate that the enhanced catalytic activity can be attributed to favorable electronic regulation, an improved charge transfer rate and An account of the strategies to enhance the water splitting
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The Effect of Fineness on the Hydration Activity Index
To improve the properties of ground granulated blast furnace slag (GGBS) and utilize ground granulated blast furnace slag efficiently, this study investigates the effect of fineness on the hydration research results can provide help for the utilization of low pozzolanic activity solid aluminosilicate wastes and the fea-sibility of using HMNS as a cement production mixture. Experimental program Pre‑treatment of HMNS The nickel slag used in the experiment is from Inner Mon-golia of China, and has the characteristics of the high con-Pozzolanic activity enhancement of magnesium-rich nickel slag
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Recycling and utilization of calcium carbide slag ScienceDirect
The production of CCS can be divided into wet and dry processes. In the wet process, slag is a mixture of the excess water and Ca(OH) 2 after the reaction of CaC 2 and water to produce acetylene. The dry slag is the Ca(OH) 2 powder with less water content after acetylene is produced by CaC 2 powder and water vapor reaction. As a Today, cement and concrete are some of the most consumed materials after water throughout the whole world. About 4.1 billion tons of cement are fabricated annually (half a ton per person) and half of this amount is produced by China [5].In addition, >1 m 3 of concrete per person is produced with Portland cement each year [6].Today, Steel slag and its applications in cement and concrete
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Minerals Free Full-Text Prediction Model for SiO2 Activity in the
Activity models based on the ion and molecule coexistence theory have been widely used in the refining of metallurgical slags, with the SiO2 content of slag playing a crucial role in improving the mechanical properties of refining slag-based cementitious materials. In order to improve the reactivity of SiO2 in slag, this study established a SiO2 Li et al. [30] found that the water-quenched slag can form a phase separation structure under the conditions of suitable slag discharge temperature and cooling rate. The phase-separated slag has a calcium-rich phase and a silicon-rich phase, and the calcium-rich phase contains a large amount of alkaline earth metal cations that will enter Investigation on high-magnesium nickel slag treated by phase
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Influence of steel slag fineness on the hydration of cement-steel slag
Steel slag has the potential to be used as a mineral admixture, but its wide utilization is restricted by the low activity. Grinding may increase the slag's hydration activity. However, little is known about the role of superfine steel slag in the composite cement paste.In this work, the hydration, microstructure, and macroscopic performances In order to investigate the effect and mechanism of coupled mechanical–chemical activation on the hydration activity of copper slag powder, copper slag powder with different grinding time and content was applied to prepare composite cement. The hydration heat and rate of the composite cement paste were tested for 120 Effect of Coupled Mechanical-Chemical Activation on Hydration Activity
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Mechanical activation of steel slag to prepare supplementary
The activity of steel slag can be noticeably improved by wet-grinding; this also produces subtle changes in the its phase, for example, C 2 S and C 3 S are hydrated during wet-grinding [18]. However, it is unclear whether the similar phase changes occur when dry-grinding steel slag, owing the lack of comparison between the two According to the test method for the fly ash strength activity index described in GB/T 1596, the activity indices of MMS A, MMS B and UMS were calculated. Materials consist of silicate cement or ordinary silicate cement of strength class 42.5 in accordance with GB 175, ISO standard sand, water and MMS A, MMS B and UMS Study on the source of activity and differences between modified
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Use of steel slag as sustainable construction materials: A review of
In the US and European countries, 60-70% of BOF slag can be recovered and used in low-end applications as aggregate in concrete or backfill materials, whereas in other countries this range variesStudies show that the potential hydration activity of slag is stimulated after wet grinding, and not only 80% of the proportion of cement could be substituted by slag [21], but also the self-hydration reaction occurs [22]. it is also found that after the wet-grinding process, the refined CSW could accelerate the hydration of cement, the mixtures show Effect of wet-grinding steel slag on the properties of Portland cement
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Hydraulic Activity and Microstructure Analysis of High
High-titanium slag is a kind of granular or massive waste slag that is produced by the quenching or natural cooling of molten slag discharged from the pig iron obtained via smelting vanadium titanium This paper attempts to turn medium basicity basic oxygen furnace (BOF) slags into construction materials by carbonation curing and enhance the reaction rate by utilizing mechanical activation. It was found that BOF slag becomes an aggregated after 30 min of grinding, providing the specific surface area was reduced with prolonged milling.. Mechanical activation of medium basicity steel slag under dry
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Recycled Smelter Slags for In Situ and Ex Situ Water and MDPI
Slags from the ferrous and nonferrous metallurgical industries have been used to treat toxic contaminants in water and wastewater. Using slag as a recycling or renewable resource rather than a waste product has environmental and economic benefits. Recycled smelter slags can be used in both in situ and ex situ treatment. However, their The increasing use of copper and its allied materials across many industries is ramping up copper mining activities in many countries, and proper management and disposal of huge volumes of copper mine tailings arising thereof is a huge challenge. Sungun mine is the biggest open-cast copper mine in the northwest of Iran. Use of copper mine tailing in concrete: strength characteristics and
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Study on the Early Effect of Excitation Method on the Alkaline Steel Slag
The change law of alkaline steel slag cementitious activity was investigated by mechanical excitation, alkaline excitation, and salt excitation methods. The effect of grinding time, chemical activators, and content of steel slag on the properties of cement replaced by steel slag was studied. The hydration products of cement replaced by steel Because hydration activity plays a main role in flexural strength. And the hydration activity of superfine steel slag is lower than that of pure cement (P.142.5). With more superfine steel slag admixed, the superfine steel slag will itself create interspace which would cause the strength of cement mortar to decrease.Preliminary investigation on the pozzolanic activity of superfine steel
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Quantifying the effect of water activity and storage temperature
The inhibitory effect of water activity (a w) and storage temperature on single spore lag times of Aspergillus niger, Eurotium repens (Aspergillus pseudoglaucus) and Penicillium corylophilum strains isolated from spoiled bakery products, was quantified. A full factorial design was set up for each strain. Data were collected at levels of a w Crude steel production in China exceeds 1 billion tons per year, and steel slag production accounts for 10%–15% of the crude steel mass. Although slag presents certain hydration activity, it is still difficult to be used as a building material because the particles contain a large amount of active calcium oxide and magnesium oxide, which are Coupling Mineralization and Product Characteristics of Steel Slag
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