آخرین محصولات
Effect of superfine slag powder on cement properties
In the study that is being given, ultra-fine fly ash and ultra-fine slag, are used to create ternary concrete, and its mechanical and durability qualities are examined.
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The hydration properties of ultra-fine ground granulated
Based on the fundamental principles of preparing reactive powder concrete (RPC), a new type of RPC was composed by replacing cement with the active powder component ultra-fine ground granulated blast-furnace slag (GGBS). GGBS is proposed as a potential alternative to silica fume (SF), which is currently the most commonly used RPC …
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Effect of ultra-fine composite Mineral Admixtures on the …
In this paper, we use ultra-fine composite mineral admixtures to replace 0, 20% and 30% of cement to prepare dry hard concrete and high-performance concrete respectively, to …
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Hydration properties of mixed cement containing ground
As an admixture material, fine powders of blast-furnace slag and fly ash are typically used among industrial by-products. Admixture materials has been used only for specific concrete production, but their application is growing because of their economic feasibility, stability, and environmental characteristics [].The KS regulations on blast …
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Effect of superfine slag powder on cement properties
Conclusion. (1) The Horsfield model is a beneficial tool to determine the diameter grade of the superfine powder to optimize the packing effect. The addition of slag powder with surface area of 500 and 800 m 2 /kg, and with diameter of 0.414 and 0.225 time of the cement matrix decreases the porosity and improves the pore structure …
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Cementitious properties of super-fine steel slag
The activity of super-fine steel slag is obviously lower than that of cement, and replacing part of cement by the super-fine steel slag weakens the cementitious properties of the binder. 3) The super-fine steel slag tends to make more contribution to the hardening of concrete than fly ash at early ages. However, at late. Acknowledgments
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Fracture Behavior of Steel Slag Powder-Cement-Based Concrete …
As can be seen from Figure 4, within the range of steel-slag-powder replacement ratios set in this paper, coarse-aggregate fracture ratio R first increases and then decreases with the increase in steel-slag-powder replacement ratios, in which the R of SPC5 concrete reaches a peak percentage of 32.46%, which is 35.53% higher than the …
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Cementitious properties of super-fine steel slag
2) The activity of super-fine steel slag is obviously lower than that of cement, and replacing part of cement by the super-fine steel slag weakens the cementitious properties of the binder. 3) The super-fine steel slag tends to make more contribution to the hardening of concrete than fly ash at early ages.
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Frontiers | Effect of Iron Tailings and Slag Powders on Workability …
Tailings are one of the largest solid wastes in stock at present. In order to improve the comprehensive utilization rate of tailings, especially to solve the problems of fine-grained tailings treatment, the concrete composite admixture was prepared by using iron tailings powder and slag powder. In order to study the influence of iron tailings …
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Microstructure analysis and Strength properties of concrete …
superfine slag powder and found that use of superfine slag powder increased the packing properties of cement paste and in addition to that, the porosity and pore size distribution of the pastes were also improved and due to the more complete hydration of the superfine slag section, the strength of the mortars also increased.
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Applications of Steel Slag Powder and Steel Slag Aggregate in …
The applications of steel slag powder and steel slag aggregate in ultra-high performance concrete (UHPC) were investigated by determining the fluidity, nonevaporable water content, and pore ...
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Preparation and applications of calcium carbonate whisker with a
Therefore, creating a hindrance in further improving the properties of the cement matrix, ultra-fine slag powder having a surface area of 433.6 m 2 /kg was employed to enhance the interfacial-bond strength between whisker and cement. Addition of slag micro powder (20 wt%) increases the CS by 12.25% and also improve the dispersion of …
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Cementitious properties of super-fine steel slag
In this study, a super-fine steel slag with the specific surface area of 786 m 2 /kg was prepared by mechanical grinding. Its cementitious properties were investigated …
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Experimental study on the mechanical and durability properties of
Cement concrete mixtures, with waste glass powder contents varying from 5 % to 25 %, as cement replacement with 5 % incremental steps and the glass sand contents varying from 10 % to 50 % as fine aggregate replacement with 10 % incremental steps, were being experimented during the present study.
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The Effect of Fineness on the Hydration Activity Index of Ground …
Susanto has conducted experimental studies on the compressive strength, flexural strength, elastic modulus, chloride ion migration, and resistivity of concrete mixed with ultra-fine slag powder. It was found that concrete mixed with ultrafine slag powder has higher early strength, lower permeability and better durability at the curing age of 3 ...
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Insights to compressive strength, impermeability and
Wet-grinding of steel slag to obtain high activity powder is one of the means to realize its application in building materials industry. Considering that concrete shrinkage may lead to cracking and decrease its durability for some structural purposes, the limitation of shrinkage strain is of practical importance to the concrete industry [27 ...
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A review on material mix proportion and strength
After analyzing the qualities of eggshell powder concrete, it was determined that replacing up to 20% of the cement in concrete with eggshell powder increases the material's strength. The ANN model's results also demonstrate its effectiveness in forecasting the strength of eggshell powder concrete, with an R 2 value of 0.96. So, it …
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Effect of superfine blast furnace slag powder on properties of …
The results show that superfine blast furnace slag powder can be effectively used in cement with high contents. The strength of cement mortar with 70% superfine blast furnace slag powder still can ...
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Silica Fume VS Fly Ash
Fly Ash. High-quality fly ash contains a large number of highly active SiO2 and Al2O3, which can be mixed into concrete mixes with cement hydration products Ca(OH)2 for secondary reaction to produce stable hydrated calcium silicate gel, which has an obvious enhancing effect.. High-quality fly ash contains more than 70% of spherical glass body, …
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Effect of superfine slag powder on cement properties
2023, Cleaner Materials. Show abstract. In general, the use of ceramic waste powder (CWP) in concrete production is limited to few percentages (i.e., less than approximately 10–15% of Portland cement), given the resulting decrease in concrete …
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The Effect of Fineness on the Hydration Activity Index of Ground
2.1. Material Properties. Ordinary Portland cement (P.O 42.5) was provided by Qilian Mountain Cement Co., Ltd. (Lanzhou, China), the specific surface area of the cement was 326 m 2 /kg. The granulated blast furnace slag was provided by Jiuquan Iron and Steel Co. Ltd. (Jiayuguan, China), and was ground into slag powder with different specific surface …
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The hydration properties of ultra-fine ground granulated
Based on the fundamental principles of preparing reactive powder concrete (RPC), a new type of RPC was composed by replacing cement with the active powder …
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Buildings | Free Full-Text | A Review on Emerging Cementitious …
Alternative to traditional concrete, sustainable concrete reduces cement content, waste management issues, and CO2 emissions. To achieve sustainable concrete, waste materials can be used as supplementary cementitious materials (SCMs) to partially replace cement. Fly ash, ground-granulated blast furnace slag, and silica fume have …
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Enhancement in compressive strength of ed concrete by ultra-fine slag
Abstract. In this study, ultra-fine slag (UFS) was used to prepare ed concrete by replacing Portland cement (PC) to enhance the compressive strength of ed concrete. PC-UFS system was designed and the replacement ratio of UFS to cement was 10%, 20%, 30% and 40%. The compressive strength at the age of 7 d, 14 d …
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Preparation and Hydration Properties of Steel Slag-Based …
Steel slag (SS) has been largely discharged but little utilized, causing an environmental problem in China. In this paper, SS-based composite cementitious materials with high strength were prepared by the high volume of SS (≥40%), granulated blast-furnace slag (GBFS), fly ash (FA), flue gas desulfurization gypsum (FGDG) and cement to …
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Characteristics of steel slags and their use in cement and concrete…
In China, BOF slag accounts for about 70% of the annual steel slag production (Cheng and Yang, 2010).In the BOF process (Fig. 1), minor steel scrap and a large amount of molten iron from ironmaking as well as fluxes (lime/dolomite) are added into the furnace, and a 99% pure oxygen flow is applied at supersonic speed through a lance …
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Preparation of modified superfine graining blast-furnace cinder …
The amount of the modified superfine granulating blast furnace slag micro powder replacing cement in concrete occupies 40 to 70 percent of the total amount of the gelled material; the superfine granulating blast furnace slag micro powder can also be used as the intermediate substance of cement production to be compounded with one of the ...
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Influence of ultra-fine slag and silica fume on properties of high
For instance, Ting et al. studied the effects of adding 10% and 15% ultra-fine slag or silica fume on the compressive strength and durability of high-strength concrete. Cement paste with ultra ...
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Steel slag superfine powder production process
The invention discloses a steel slag superfine powder production process and belongs to the technical field of resource comprehensive utilization and environment protection. The steel slag superfine powder production process comprises the steps that a coarse grinding device is used for conducting coarse crushing on steel slag tailings; the steel …
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Compressive strength and hydration process of sodium carbonate
Abstract. Alkali-activated slag (AAS) attracted wide attention in low carbon cementitious materials. In this study, superfine slag was activated by sodium carbonate …
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