Alkali activated slag pastes with surface-modified blast furnace slag

Kim, Gwangmok; Khalid, Hammad R.; Kim, Hyung Jun; Lee, Haeng‐Ki

doi:10.1016/j.cemconcomp.2016.11.009

Cited by 31 publications

(8 citation statements)

References 44 publications

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“…They have the disadvantages of large area and high system investment. Based on the characteristics of the treatment method, chemical composition and mineral composition of blast furnace slag, there are different ways of treatment [8]- [20]. Such as clsvof method based on k-wsst rayleigh flow model simulates the melting process of blast furnace slag at high temperature [8], metallurgical slag coal gasification system controls the slag outflow speed at the slag outlet to improve combustion efficiency [9], micro analysis and hot state experiment reduces the exhaust gas emission when the blast furnace slag melts [10].…”

Section: Introductionmentioning

confidence: 99%

“…The biggest advantage for the above mentioned methods is continuous measurement and high accuracy [17], [18]. The results show that the surface emissivity of the slag particles is 0.89 when the surface temperature is 1402 • C. With the increasing awareness of energy conservation and emission reduction, many scholars gradually realize the broad prospect of blast furnace slag preparation of slag cotton [19], [20]. They explore the new technology of direct fibrosis of blast furnace slag preparation of slag cotton, and have made some achievements [21]- [29].…”

Section: Introductionmentioning

confidence: 99%

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Notice of Retraction: Perspective and Prediction of the Rule of High Temperature Melting of SiO₂ via Visual Analysis

Zhu

et al. 2020

IEEE Access

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This paper focuses on how to perspective the melting behavior of solid iron tailings in molten blast furnace slag and take a new non-contact visual analytical method to predict its melting law. The optimized convolution neural network (CNN) is used to track the moving target in charge coupled device (CCD) camera system efficiently and accurately, and the melting behavior of SiO 2 is described by coordinate translation transformation theory. Hierarchical agglomerative clustering (HAC) and delaunay triangulation were used to extract the characteristic parameters of the melting process of SiO 2. The prediction model of the melting rate of SiO 2 at high temperature was established by least square fitting (LSF) and dimensional analysis, and compared with the actual melting rate of SiO 2 obtained by experiments. The results show that the melting characteristics of SiO 2 at high temperature are in accord with certain function rule. The performance of optimized CNN in terms of processing time and accuracy is significantly improved, and the fusion rate prediction model of SiO 2 is verified by 100% accuracy. It provides theoretical support and model basis for the improvement of slag cotton preparation technology. INDEX TERMS Melting rate, target tracking, feature extraction, dimensional analysis, best match.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Notice of Retraction: Perspective and Prediction of the Rule of High Temperature Melting of SiO₂ via Visual Analysis

Zhu

et al. 2020

IEEE Access

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“…Gerek küresel ısınmaya olan negatif etkisi gerekse üretimi esnasındaki yüksek enerji tüketimi, inşaat sektöründe çimento benzeri hidrolik aktivite sergileyen alternatif bağlayıcı malzemelerin yaygınlaşmasını zorunlu kılmaktadır. Alkali-aktive edilmiş harçlar, üstün mekanik ve durabilite özellikleri ile çimento harçlarına alternatif oluşturabilecek düzeyde potansiyele sahiptir [5]. Yüksek fırın cürufu, uçucu kül, silika tozu gibi mineral kökenli ve hidrolik aktivite gösteren malzemelerin kısmen veya tamamen çimento yerine kullanılabildiği alkali-aktive edilmiş harçlarda azalan çimento içeriği ile orantılı olarak çimento üretimine olan ihtiyaç da azalmaktadır [6].…”

Section: Gi̇ri̇ş (Introduction)unclassified

Atık Cam Tozu İçeren Alkali – Aktive Edilmiş Cüruf Harçlarının Mekanik, Por Yapısı, Termal Yalıtkanlık ve Mikro Yapı Özellikleri

Bostancı

2022

Politeknik Dergisi

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Enerji ve doğal kaynak tüketiminin sınırlandırılması fikri, günümüzdeki sürdürülebilirlik politikalarının odak noktasını oluşturmaktadır. Yüksek enerji gereksinimleri ve doğal kaynak tüketimleri sebebiyle çimento harçları için alternatif arayışı her geçen gün artmaktadır. Bu amaçla; bu çalışmada alkali-aktive edilmiş cüruf harçlarında atık cam tozu ilavesinin harç numunelerinin mekanik, por yapısı, termal iletkenlik ve mikro yapı özelliklerine olan etkisi araştırılmıştır. Atık cam tozu, harç karışımlarında ağırlıkça %15, %30 ve %45 oranlarında doğal kum ile yer değiştirilmiş ve tüm harç karışımlarında bağlayıcı malzeme içeriğinde çimento yerine ağırlıkça %50 oranında da cüruf tercih edilmiştir. Çalışmadan elde edilen sonuçlar, %15 seviyesindeki kum-atık cam tozu yer değişimi için sınırlı düzeydeki mekanik dayanım düşüşü ile termal yalıtkanlık özelliklerinin %35 düzeyinde artabileceğini ortaya koymuştur. Atık cam tozu katkılı alkali-aktive edilmiş cüruf harçları, üstün termal yalıtkanlık özellikleri ve sürdürülebilirlik politikalarına uyumlu çevre dostu özellikleri ile gelecekte çimento harçları yerine kullanılabilecek potansiyeli işaret etmektedir. Anahtar Kelimeler: Cüruf, cam tozu, alkali aktive edilmiş harç, termal iletkenlik, tokluk.

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“…Moreover, this will also lead to additional benefits in terms of cost savings, energy conservation, protection of nonrenewable resources, etc [16]. Remarkably, the pozzolanic activity of ground granulated blast furnace slag (GGBS) is superior to fly ash [17,18], thus it can be expected to further improve the early-age strength of LFBM when GGBS is used to replace a part of fly ash; the use of chemical activator approaches can promote the pozzolanic reaction of fly ash [19,20], increasing the early strength of LFBM, wherein the alkali activation and sulfate activation are the most-used chemical activating methods [21][22][23]. On the basis of satisfying the early-age strength and reducing the drying shrinkage of LFBM, using GGBS and sulfate activator may be a good option because of the main hydration product activated by sulfate being ettringite.…”

Section: Introductionmentioning

confidence: 99%

Cement‐Lime‐Fly Ash Bound Macadam Pavement Base Material with Enhanced Early‐Age Strength and Suppressed Drying Shrinkage via Incorporation of Slag and Gypsum

Liu

et al. 2019

Advances in Civil Engineering

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In this study, a novel cement-lime-fly ash bound macadam (CLFBM) as pavement base material was designed by incorporating Portland cement, dihydrate gypsum (CaSO4·2H2O), and ground granulated blast furnace slag (GGBS) into the lime-fly ash bound macadam (LFBM) for the purpose of the early opening to traffic. The multifactors orthogonal test method was used to evaluate the effects of Portland cement, dihydrate gypsum, and GGBS on the early-age strength of CLFBM. Moreover, the compressive and flexural strengths at 28 days as well as the drying shrinkage development in 56 days were investigated. By conducting the comprehensive analysis for the better mechanical properties and the lowest drying shrinkage, Portland cement : dihydrate gypsum : lime : fly ash : GGBS : gravels = 2 : 1 : 6 : 5.6 : 8.4 : 80 is determined as the optimal mix proportion of CLFBM. In addition, scanning electron microscope (SEM) results confirmed the formation of a large number of ettringite and C-S-H gels, providing a powerful support for the enhanced early-age strength and suppressed drying shrinkage of CLFBM.

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Alkali activated slag pastes with surface-modified blast furnace slag

Cited by 31 publications

References 44 publications

Notice of Retraction: Perspective and Prediction of the Rule of High Temperature Melting of SiO₂ via Visual Analysis

Notice of Retraction: Perspective and Prediction of the Rule of High Temperature Melting of SiO₂ via Visual Analysis

Atık Cam Tozu İçeren Alkali – Aktive Edilmiş Cüruf Harçlarının Mekanik, Por Yapısı, Termal Yalıtkanlık ve Mikro Yapı Özellikleri

Cement‐Lime‐Fly Ash Bound Macadam Pavement Base Material with Enhanced Early‐Age Strength and Suppressed Drying Shrinkage via Incorporation of Slag and Gypsum

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