Comparison between the effects of superfine steel slag and …
Superfine particles have been used as mineral admixtures to enhance physical properties, mechanical properties, and durability of concrete in a lot of research. …
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Superfine particles have been used as mineral admixtures to enhance physical properties, mechanical properties, and durability of concrete in a lot of research. …
WhatsApp: +86 18221755073
Steel slag has a short history of being utilized as an industrial by-product in China. Reporting on the recovery of steel slag in China only began in the 1970s (Shan, 2000). The utilization of steel slag in China has undergone three stages, which are illustrated in Fig. 3. The first stage is the disposal stage, which occurred from the 1950s …
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As an examination of the analysis, blended cement mortars and pastes incorporating superfine slag powder were tested for strength and mercury intrusion, respectively. It was found that owing to ...
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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 days.
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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 meet the requirements of Portland cement P•O 32·5. Meanwhile, superfine blast furnace slag powder can improve fluidity of …
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The XRD results show that the obtained Fe nanoparticles (FeNPs) revealed high diffraction intensity because of good crystal integrity, and the remarkable peaks located at 2θ = 44.6°, 65.1°, and 82.5° can be well assigned to the (110), (200), and (211) crystalline planes of Fe 0 (JCPDS: 06–0696) (Fig. 1 a). The characteristic peak of …
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The results show that malic acid helps the formation of 5Mg (OH)2·MgSO4·7H2O (517 phase) and gives MOS cement a finer pore structure. Addition of superfine steel slag …
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Superfine slag powder could reduce the alkaline and increase the content of C-S-H by absorbing CH in the cement hydrates. The existence of CH accelerated the hydration of slag and the decreased content of Ca(OH) 2 enhanced the hydration of C 3 …
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In this study, steel slag powder (SSP) and SP by-products from manufactured sand were employed with a total dose of less than 30% as a replacement for cement. ... The possible reason is that the incorporation of fine particles will increase the water demand of the matrix and cause shrinkage (Rojo-Lopez et al., 2020). Obviously, …
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The paper examines the effect of ball (drum) grinding and jet milling on the particle size distribution and specific surface area of the powders produced from blast-furnace slag. The effectiveness of jet milling, providing relatively equal powder particles (more than 85% of the fractions is 0–10 μm in size), is shown. Decrease in the average …
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Alkali-activated slag (AAS) attracted wide attention in low carbon cementitious materials. In this study, superfine slag was activated by sodium carbonate (SC), and marble powder (MP) was also used.
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Superfine particles have been used as mineral admixtures to enhance physical properties, mechanical properties, and durability of concrete in a lot of research. In this study, superfine steel slag (FSS) and superfine phosphorus slag (FPS) were ground to 643 and 657 m2 kg−1, respectively. The water-to-binder (W/B) ratios were set as 0.45 …
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DOI: 10.1016/j.cscm.2022.e01682 Corpus ID: 253661310; Ultra-high performance concrete design method based on machine learning model and steel slag powder @article{Sun2022UltrahighPC, title={Ultra-high performance concrete design method based on machine learning model and steel slag powder}, author={Guorui Sun and Maohua …
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The slag can form powder after grinding. When the specific surface area of slag powder is more than 400 m 2 /kg, the strength of the cement is obviously enhanced [1]. So how to ensure the quality and yield of slag powder has been an important issue. Slag powder is a multivariate, strongly coupled and nonlinear process.
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In this paper, we investigates the concretes respectively incorporated with 5% (m:m) nano-SiO2 (NS), 40% (m:m) super-fine slag (SS), as well as 40% (m:m) SS combining 20% replacement of sand volume with RP. The tested mechanical properties include compressive strength, abrasion resistant strength, and elastic modulus. The …
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Abstract. The particle size distribution (PSD) of the dense packing powder and that of actual cement powder was analyzed to explain the packing effect of …
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Steel slag is generally regarded as a supplementary cementitious material in cement-based materials, which is conducive to the realization of the goal of carbon peak and carbon neutralization. However, the lower cementitious activity and poorer volume stability of steel slag limit its high dosage in cement-based materials. In this paper, steel …
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The particle size distribution (PSD) of the dense packing powder and that of actual cement powder was analyzed to explain the packing effect of superfine powder. The degrees of hydration of slag powders with specific surface area ranging from 300 to 800m(2)/kg were calculated to illustrate the enhancement of pozzolanic effect. As an …
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In this article, the packing effect and pozzolanic effect of superfine slag powder were mathematically analyzed in an effort to evaluate the rudimentary …
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Ferronickel slag can be used as fine aggregate instead of natural sand for preparing concrete. Its use affects the durability of concrete [9,10,11,12], which is determined by measuring the volume of permeable voids (VPV), compressive strength, and chloride permeability of concretepared to the use of natural sand, the 28-day …
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Steel slag could be valuable for promoting a sustainable relationship between the concrete and steel industries. C 2 S, C 3 S, C 4 AF, and C 3 A in steel slags are typical mineral phases of Portland cement, indicating the potential of steel slags to function as hydraulic materials. Therefore, one recycling option is to grind steel slags …
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In order to further investigate the effect of modifier and superfine steel slag powder on properties of magnesium oxysulfate (MOS) cement, the examinations of compressive strength, hydration products, and pore structure of various MOS cement mixtures are discussed in detail. The results show that malic acid helps the formation of 5Mg(OH)2 ...
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It is an effective method to prepare geopolymer with recycled brick and concrete fine powder (RP) and slag as main materials for the resource utilization of construction waste.
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Semantic Scholar extracted view of "A new method to prepare mesoporous silica from coal gasification fine slag and its application in methylene blue adsorption" by Shuo Liu et al. ... Dandan Zhu Jing Zuo Yin-shan Jiang Jinyi Zhang Jiu-peng Zhang Cundi Wei. ... Powder Technology. 2021; 23.
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Abstract Industrial waste-like slag has caused serious problems all over the world. In this paper, blast furnace slag was ground to be superfine powder and partial replacement of cement. Multiple contents of slag powder used in cement were studied by cement paste, cement mortar and cement concrete experiment. Water requirement of …
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1. Introduction. Steel slag is a by-product of steel manufacturing [].Approximately 160 kg of steel slag is generated per ton of steel produced [].The common chemical compounds in steel slag are SiO 2, CaO, Fe 2 O 3, Al 2 O 3, and MnO [3, 4].The major mineral components of steel slag are C 3 S, C 2 S, C 4 AF, RO phase, and free …
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Effect of MgO and superfine slag modification on the carbonation resistance of phosphogypsum-based cementitious materials: Based on hydration enhancement and phase evolution regulation. ... Approximately 15 mg of PESSC powder was stored in an alumina crucible, and thermally treated from 25 °C to 1000 °C at a ramp rate of 10 °C …
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@article{He2022NdopedRC, title={N-doped residual carbon from coal gasification fine slag decorated with Fe3O4 nanoparticles for electromagnetic wave absorption}, author={Jun He and Shengtao Gao and Yuanchun Zhang and Xingzhao Zhang and Han-xu Li}, journal={Journal of Materials Science & Technology}, year={2022}, url={https://api ...
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Steel slag is generally regarded as a supplementary cementitious material in cement-based materials, which is conducive to the realization of the goal of carbon peak and carbon neutralization. However, the lower cementitious activity and poorer volume stability of steel slag limit its high dosage in cement-based materials. In this paper, steel slag ultrafine …
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Electromagnetic-wave (EMW) absorbers with strong reflection loss (RL) and a wide absorption frequency band under extremely thin thicknesses are highly desirable. Heterostructured multi-interface Fe3O4/FeO/Fe (FeOx) nanoparticle/coal gasification fine slag (CGFS) hybrids were successfully synthesized by coating highly graphitized CGFS …
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Ferronickel slag is mechanical grinded to manufacture UBNS. The cement used in this study is P· I 42.5 type reference cement conforming to the Chinese national standard GB 8076−2008, which is provided by Zhonglian Cement Co., Ltd. Fig. 1 shows the XRD patterns of UBNS and cement. The mineral phases in UBNS are mainly spinel …
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The synthesis of the Sb–SnO 2 /coal gasification fine slag porous microbead (ATCM) powder was performed using the following steps [35]. Based on our experimental design, an acidic ion solution was prepared using an appropriate molar ratio of SnCl 4 ·5H 2 O/SbCl 3 by dissolving SnCl 4 ·5H 2 O and SbCl 3 in a solution of 18 wt% HCl. The CMs ...
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DOI: 10.1016/J.JOBE.2021.103121 Corpus ID: 238689561; Compressive strength and hydration process of sodium carbonate-activated superfine slag/marble powder binders @article{Du2021CompressiveSA, title={Compressive strength and hydration process of sodium carbonate-activated superfine slag/marble powder …
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The quality of steel slag fine aggregate as a product met the GB/T 14684-2011 construction sand grade II standard. The application of this technology is expected to improve the stability of steel ...
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