Strength development of solely ground granulated blast furnace slag geopolymers

Aziz, Ikmal Hakem; Abdullah, Mohd Mustafa Al Bakri; Salleh, Mohd Arif Anuar Mohd; Azimi, Emy Aizat; Chaiprapa, Jitrin; Sandu, Andrei Victor

doi:10.1016/j.conbuildmat.2020.118720

Cited by 104 publications

(44 citation statements)

References 48 publications

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“…This complex slag morphology is attributed to the complexity of the elemental composition, namely presence of several oxides. According to the literature, large agglomerate species can be assigned to calcium-containing compounds (calcium hydroxide, calcium carbonate) [25] , while prismatic needle shape crystals can represent an ettringite phase (hydrous calcium aluminum sulfate mineral) [26] , [27] – a product of the clinker phases hydration present in the desulfurization slag [28] , [29] . Micrographs of the materials synthesized from the desulfurization steel slag using different treatment methods are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Ultrasound irradiation as an effective tool in synthesis of the slag-based catalysts for carboxymethylation

Kholkina

Kumar

Eränen

et al. 2021

Ultrasonics Sonochemistry

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Highlights Synthesis of low-cost catalysts from desulfurization slag. Application of ultrasonication for process intensification. Increase of surface area from 6 to 49 m 2 /g. Development of texture and crystal morphology. Strong improvement of catalytic activity in carboxymethylation of cinamyl alcohol.

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Section: Resultsmentioning

confidence: 99%

Ultrasound irradiation as an effective tool in synthesis of the slag-based catalysts for carboxymethylation

Kholkina

Kumar

Eränen

et al. 2021

Ultrasonics Sonochemistry

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“…Content may change prior to final publication. (1) Standardization of contrast for calculation x (1) No Output sample characteristic diagram x (2) Yes Probability maximization sampling layer andGet characteristic diagram x (3) Within the range of Assume One edge e in E (with two endpoints α and β) satisfies the empty circle property, it can be called delaunay edge. If a triangulation T of point set V α only contains delaunay edges, the triangulation is called delaunay triangulation.…”

Section: Image Feature Extractionmentioning

confidence: 99%

“…The single strain transformation is used to obtain the coordinate transformation matrix. Convert the corresponding matrix to the dynamic tracking of SiO Output nonlinear characteristics x (1) 15:…”

Section: A Motion Track Of Center Of Massmentioning

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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“…On the morphological aspects formed in calcium-rich precursors, such as blast furnace slag, Figure 13 is analyzed, which shows the SEM of an BFS activated by sodium hydroxide, and silicate. The figure shows the presence of tobermorite gels (C-A-S-H), which do not have an aspect as visible as that of zeolites formed in geopolymers [99]. It is possible to prove the similarities of the formed material with those found in cementitious materials, where the C-S-H phase is verified.…”

Section: Characterizaion Of Gels Formed In the Aa Reactionmentioning

confidence: 93%

Reaction mechanisms of alkali-activated materials

Marvila

Azevedo

Vieira

2021

Rev. IBRACON Estrut. Mater.

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The Alkali-Activated Materials (AAM) are defined as materials obtained through the reaction between precursors and activators, and are separated into two classes depending on the products formed in the reaction, those rich in calcium, as the blast furnace slag, whose Ca/(Si+Al) ratio is higher than 1; and poor in calcium, which is the geopolymers subclass. In this review article, some bibliographical aspects were discussed regarding the discovery of these materials, through research conducted by Victor Glukhovsky and through the characterization of historical monuments by Davidovits, which began in the 50s and 60s and persist to the present day. The main products obtained in the alkaline activation reaction were also addressed, using the definition of polysialates and zeolites, in the case of geopolymers, and the tobermorite structure, in the case of materials rich in calcium. The main steps of the alkali-activated reaction, such as dissolution, condensation, polycondensation, crystallization, and hardening, were discussed. Some techniques for characterizing the AA reaction products were also examined, such as X-ray diffraction (XRD), nuclear magnetic resonance spectrometry (NMR), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Finally, the main factors that interfere in the kinetics of AA reactions were explored, in which the type of cure and the activating solution used in the alkali-activated materials production stands out.

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Strength development of solely ground granulated blast furnace slag geopolymers

Cited by 104 publications

References 48 publications

Ultrasound irradiation as an effective tool in synthesis of the slag-based catalysts for carboxymethylation

Ultrasound irradiation as an effective tool in synthesis of the slag-based catalysts for carboxymethylation

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

Reaction mechanisms of alkali-activated materials

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