Inter-comparative study of quantitative methods of industrial clinker

Mohamed, Benmohamed; Haykel, Galai; Alouani, Rabah; Béjaoui, M.; Abdessalem, Ben Haj Amara; Hafsia, Ben Rhaim

doi:10.1007/s11595-017-1738-z

Cited by 3 publications

(3 citation statements)

References 38 publications

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“…However, this assumption does not take account of Fe 2 O 3 and Al 2 O 3 insertions in the alite and belite phases during the real clinkering process ( Labidi et al, 2019b ). Thus, the aluminate and ferrite amounts by using Bogue method probably contained an error and should be revised or another more accurate means should be used to quantify C 3 A and C 4 AF such as X-rays diffraction coupled with Rietveld refinement ( Mohamed et al, 2017 ).…”

Section: Bibliographic Reviewmentioning

confidence: 99%

Natural Resources Exploitation in Sulfate-Resisting Portland Cement Manufacturing: Towards Quality Improvement and Reduction of Environmental Impact

Labidi

Megriche

2022

Front. Chem.

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Sulfate-resisting (SR) Portland cement is commonly used in building works to improve concrete’s durability against external sulfate attack. This attack is considered a very serious chemical aggression that causes damage and cracking of concrete structures. These special cements have a very particular mineralogical composition, C3A ≤ 3% and (2C3A + C4AF) ≤ 20%, which makes the cementitious matrix resistant to sulfate attack. This kind of product is very difficult to manufacture since low alumina (C3A) necessitates the use of a high kiln temperature in order to keep a sufficient liquid phase necessary to maintain the stability of the cement manufacturing process. In this context, this study aims to optimize SR Portland cement raw meals using natural materials collected from different regions in Tunisia, mainly ordinary limestone, siliceous limestone, black marl, grey marl, iron ore, and natural fluorapatite. The collected specimens were characterized by an X-ray fluorescence spectrometer in order to determine its elemental chemical composition. The optimization of the SR Portland cement raw meal combinations was done by means of a calculation tool based on the chemical composition of each used raw material and the variation of burning modules (LSF, SIM, and ALM). It has been found that natural fluorapatite integration (0%–15%) in raw mix preparation leads to the raw meals required for the SR Portland cement standard (C3A ≤ 3% et 2 C3A + C4AF ≤ 20%). Moreover, it was shown that the estimated SR raw meals ensure the cement manufacturing process stability (acceptable burning modules “LSF = 100; SIM = 3; ALM = 0.91 and sufficient liquid phase) and decrease the CO2 emissions in cement production.

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Section: Bibliographic Reviewmentioning

confidence: 99%

Natural Resources Exploitation in Sulfate-Resisting Portland Cement Manufacturing: Towards Quality Improvement and Reduction of Environmental Impact

Labidi

Megriche

2022

Front. Chem.

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“…However, the equations only give approximate clinker compositions and industrial clinkers show slight differences from the theoretical predictions. Furthermore, deviations can be even greater when impurities are present due to impacts on clinker phase stability, thus impacting the final properties of the cement 8 . Temperature variations, the composition of the kiln atmosphere, the presence of minor elements, and the absence of equilibrium conditions from cooling can all influence the development of the clinker phases, thus reducing the accuracy of the phase compositions estimated by Bogue's calculations 9 , 10 .…”

Section: Introductionmentioning

confidence: 99%

“…One of the biggest challenges in cement manufacture at an industrial scale is maintaining the consistency of the clinker phases over multiple production cycles. Such variability stems from using alternative feedstocks such as waste or by-products, containing impurities, which can induce temperature changes inside the kiln and during the cooling process 8 . Different minor impurities can stabilise or destabilise specific silicate phases over others, induce the formation of new clinker phases, and compromise the reactivity and stability of the cement when hydrated [28][29][30][31] .…”

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confidence: 99%

Thermodynamic modelling of cements clinkering process as a tool for optimising the proportioning of raw meals containing alternative materials

Costa,

Coppe,

Bielefeldt

et al. 2023

Sci Rep

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The valorisation of waste or by-products in Portland clinker production is a promising alternative for developing sustainable cements. The complexity of the chemical reactions during clinkering demands an adequate dosing method that considers the effect of feedstock impurities to maximise the potential substitution of natural resources by waste or by-products, while guaranteeing the clinker reactivity requirements. This study proposes a raw meal proportioning methodology for optimising co-processing of natural feedstocks with alternative raw materials in clinker production, intending to reduce the content of natural raw materials needed, while promoting an optimal clinker reactivity. A thermodynamic modelling sequence was developed considering the variability of raw materials composition and heating temperatures. The model was then validated by comparing simulation outcomes with results reported in previous studies. An experimental case study was conducted for validation of the proposed method using a spent fluid catalytic cracking catalyst (SFCC), a by-product from the oil industry as an alternative alumina source during clinkering. The modelling simulations indicated that substitution of natural feedstocks by 15 wt% SFCC promotes the formation of reactive clinkers with more than 54% tricalcium silicate (C3S). Mixes with the potential to form the highest C3S were then produced, and heating microscopy fusibility testing was applied for evaluating the clinkers’ stability. The main factors governing the reactivity and stability of the clinker phases were the melt phase content, alumina modulus, and formation of C3S and dicalcium silicate (C2S). The self-pulverisation of clinker during cooling was observed in selected mixes, and it is potentially associated with high viscosity and low Fe content in the melt phase. The proposed framework enables optimisation of the dosing of raw meals containing alternative alumina-rich feedstocks for clinker production and allows a deeper interpretation of limited sets of empirical data.

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Influence of calcium sulfoaluminate cement on early-age properties and microstructure of Portland cement with hydroxypropyl methyl cellulose and superplasticizer

Guo¹

2022

Journal of Building Engineering

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Inter-comparative study of quantitative methods of industrial clinker

Cited by 3 publications

References 38 publications

Natural Resources Exploitation in Sulfate-Resisting Portland Cement Manufacturing: Towards Quality Improvement and Reduction of Environmental Impact

Natural Resources Exploitation in Sulfate-Resisting Portland Cement Manufacturing: Towards Quality Improvement and Reduction of Environmental Impact

Thermodynamic modelling of cements clinkering process as a tool for optimising the proportioning of raw meals containing alternative materials

Influence of calcium sulfoaluminate cement on early-age properties and microstructure of Portland cement with hydroxypropyl methyl cellulose and superplasticizer

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