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Journal articles on the topic 'Clinker Portland'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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1

Luo, Li, Yimin Zhang, Shenxu Bao, and Tiejun Chen. "Utilization of Iron Ore Tailings as Raw Material for Portland Cement Clinker Production." Advances in Materials Science and Engineering 2016 (2016): 1–6. http://dx.doi.org/10.1155/2016/1596047.

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The cement industry has for some time been seeking alternative raw material for the Portland cement clinker production. The aim of this research was to investigate the possibility of utilizing iron ore tailings (IOT) to replace clay as alumina-silicate raw material for the production of Portland cement clinker. For this purpose, two kinds of clinkers were prepared: one was prepared by IOT; the other was prepared by clay as a reference. The reactivity and burnability of raw meal, mineralogical composition and physical properties of clinker, and hydration characteristic of cement were studied by

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2

Zucchini, Azzurra, Paola Comodi, Alessandro Di Michele, et al. "Effect of the Nano-Ca(OH)2 Addition on the Portland Clinker Cooking Efficiency." Materials 12, no. 11 (2019): 1787. http://dx.doi.org/10.3390/ma12111787.

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A new technology was tested to improve the cooking efficiency of the raw mixture for Portland clinker production by the use of nano-Ca(OH)2. A decrease in the free lime concentration after the firing of approximately 35% and 55% in the nano-added clinkers burned at 1350 °C and 1450 °C, respectively, with respect to the standard Portland clinkers was observed. Moreover, in the nano-added clinkers, a slight decrease in alite (C3S), of approximately 2–4 wt%, and increase in belite (C2S), of approximately 5–6 wt%, were observed. Despite these variations, the C2S and C3S abundance lies within the r

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3

Zezulová, Anežka, Theodor Staněk, and Tomáš Opravil. "The Influence of Barium Compounds on the Formation of Portland Cement Clinker." Materials Science Forum 851 (April 2016): 116–21. http://dx.doi.org/10.4028/www.scientific.net/msf.851.116.

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Portland clinker is thanks to its large-scale production a continuously studied topic. Clinker, or Portland cement, is used for construction purposes or for insulation and special applications. One of these special applications could be shielding of different types of radiation by making use of the content of barium ions. The present article examines the influence of barium oxide on the formation and properties of Portland clinker, which could be, by incorporation of barium ions into the system, used as a binder for buildings resistant to various types of radiation. Barium sulphate and barium

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4

Benmohamed, Mohamed, Rabah Alouani, Amel Jmayai, Abdesslem Ben Haj Amara, and Hafsia Ben Rhaiem. "Morphological Analysis of White Cement Clinker Minerals: Discussion on the Crystallization-Related Defects." International Journal of Analytical Chemistry 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/1259094.

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The paper deals with a formation of artificial rock (clinker). Temperature plays the capital role in the manufacturing process. So, it is useful to analyze a poor clinker to identify the different phases and defects associated with their crystallization. X-ray fluorescence spectroscopy was used to determine the clinker’s chemical composition. The amounts of the mineralogical phases are measured by quantitative XRD analysis (Rietveld). Scanning electron microscopy (SEM) was used to characterize the main phases of white Portland cement clinker and the defects associated with the formation of cli

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5

Jovanovic, Natasa, Miroslav Komljenovic, Ljiljana Petrasinovic-Stojkanovic, Zvezdana Bascarevic, Violeta Bradic, and Aleksandra Rosic. "Substitution of the clayey mineral component by lignite fly ash in portland cement clinker synthesis." Chemical Industry 60, no. 9-10 (2006): 253–58. http://dx.doi.org/10.2298/hemind0610253j.

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Fly ash from four power plants in Serbia (PP "Morava" - Svilajnac, PP "Kolubara" - Veliki Grijani, PP "Kostolac" - units B1 and B2 - Kostolac and PP "Nikola Tesla" - units A and B - Obrenovac) was utilized as the starting raw component for Portland cement clinker synthesis. Limestone and quartz sand from the "Holcim - Serbia, a.d." cement factory were the other two starting raw components. Based on the chemical composition of the raw components and from the projected cement moduli, the amounts of raw components in the raw mixtures were calculated. Six different raw mixtures were prepared - eac

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6

León-Reina, L., A. G. De la Torre, J. M. Porras-Vázquez, et al. "Round robin on Rietveld quantitative phase analysis of Portland cements." Journal of Applied Crystallography 42, no. 5 (2009): 906–16. http://dx.doi.org/10.1107/s0021889809028374.

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Interlaboratory studies on the precision and accuracy of Rietveld quantitative phase analysis (R-QPA) of mixtures of crystalline phases have already been carried out. However, cement-related materials are samples of variable complexity, ranging from three phases in white Portland clinkers to more than eight phases in grey cements, that need to be specifically investigated. Here, the results are reported from a round robin on the R-QPA of cement-related materials from laboratories with experience in this type of analysis. The aim of the work was to evaluate the levels of precision and accuracy

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7

Andrade, F. R. D., M. Pecchio, D. P. Bendoraitis, T. J. Montanheiro, and Y. Kihara. "Basalt mine-tailings as raw-materials for Portland clinker." Cerâmica 56, no. 337 (2010): 39–43. http://dx.doi.org/10.1590/s0366-69132010000100007.

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Large volumes of waste materials are produced by crushing of basaltic rocks for aggregate production, which is widely used in regions that lack rocks of granitic or gneissic composition. Two types of waste materials are produced (a) quarry fines, which are in part used as fine aggregates in concrete and (b) vesicular basalt, a porous variety of basalt that is useless as aggregate. This paper presents a procedure to use basaltic mine-tailings as raw-mixtures for Portland cement by adjusting the proportion of the other raw-materials (limestone, clay, iron ore). It is demonstrated that there is n

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8

Mestnikov, A. E., A. I. Kudyakov, and V. N. Rozhin. "PORTLAND CEMENT WITH NATURAL MINERAL ADDITIVES." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture, no. 2 (April 29, 2019): 192–201. http://dx.doi.org/10.31675/1607-1859-2019-21-2-192-201.

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One of the most effective developments of energy saving in the production of Portland cement used worldwide, is joint grinding of Portland cement clinker with injected mineral additives, such as pozzolanic rocks, ashes and slags.The aim of this work is to substantiate the possibility of the quality cement production using joint grinding of Portland cement clinker with natural mineral additives with a view to the of production location.River (quartz-feldspar) sands of the Lena basin and large-tonnage raw materials (zeolitecontaining rocks of the Khonguruu deposit) are considered as mineral addi

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9

Cui, Shi Cai, Xing Jun Lv, and Jing Liu. "Preparation of Portland Cement with Pumice." Applied Mechanics and Materials 99-100 (September 2011): 733–38. http://dx.doi.org/10.4028/www.scientific.net/amm.99-100.733.

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The portland cement clinker was successfully produced using pumice as the principal materials. Effects of different calcine temperature on cement clinker were studied. Phase compositions of clinker were confirmed by combining the phase diagram with X-ray diffraction. Microstructures of clinker were analyzed by scanning electron microscope. From the result of mechanical property showed that the compression strength of clinker can be reached 35MPa. The result of scanning electron microscope showed that the main hydrating products were CSH gels, AFt and CH crystals, the morphology of which were n

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10

Sheshukov, Oleg, and Egiazaryan Denis. "Difficulties of technogenic formations roasting products processing into the portland cement clinker in the presence of a significant amount of SO3." E3S Web of Conferences 126 (2019): 00048. http://dx.doi.org/10.1051/e3sconf/201912600048.

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Synthesis of the portland cement clinker in the presence of a significant amount of SO3 is difficultdue to the tricalcium silicate formation suppression. Since some technogenic formations contain a significant amount of SO3 it is hard to obtain the portland cement clinker from it. The analysis of the SO3 influence on the clinker–formation thermodynamic process allowed to reveal a number of regularities of their occurrence and to propose a method for the raw mix composition calculating and its preparation toensure a stable portland cement clinker synthesis.

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11

Zhang, Jie, Zong Hui Zhou, and Xin Cheng. "Formation Kinetics of Regenerated Cement Clinker Calcined by Using Wasted Recycling Concrete Powders as Raw Meals." Advanced Materials Research 1073-1076 (December 2014): 1309–12. http://dx.doi.org/10.4028/www.scientific.net/amr.1073-1076.1309.

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Artificial aggregates with high strength and a similar mineral composition to Portland cement clinker are made up of industrial waste and limestone, which are prepared for recycling concrete. Regenerated cement clinker is fabricated by recycling concrete powder added with a small amount of correction raw materia. Through the Gentling equation computing and microstructure morphology observation, the apparent activation energy (Ea) of two kinds of regenerated cement clinkers are 199 kJ/mol and 333 kJ /mol respectively, which is lower than that of traditional cement clinker (518 kJ/mol). The reac

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Sheshukov, O. Yu, I. V. Nekrasov, and Denis K. Egiazaryan. "Features of Tri-Calcium Silicate Formation Suppression by Sulphur and Possible Ways of its Preventing." Materials Science Forum 989 (May 2020): 221–27. http://dx.doi.org/10.4028/www.scientific.net/msf.989.221.

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Synthesis of the portland cement clinker in the presence of a significant amount of SO3 is difficult, due to the tri-calcium silicate formation suppression. Since some technogenic formations contain a significant amount of SO3, it is hard to obtain the portland cement clinker from it. The analysis of the SO3 influence on the clinker-formation thermodynamic process allowed to reveal a number of regularities of their occurrence and to propose a method for the raw mix composition calculating and its preparation, to ensure a stable portland cement clinker synthesis.

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13

Enríquez, M. K., J. I. Tobón, and J. H. Ramírez. "Use of industrial wastes for the synthesis of belite clinker." Materiales de Construcción 70, no. 339 (2020): 226. http://dx.doi.org/10.3989/mc.2020.14219.

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The synthesis of belite clinker was studied using industrial wastes: paper sludge, cement kiln dust and rice husk ashes, as substitutes for natural raw materials. Wastes were characterized by XRF, XRD and TG analysis. Different formulations were prepared to produce clinker at 1300, 1350 and 1400 °C. The clinker obtained was characterized using optical microscopy, XRD and f-CaO content determined by ethylene glycol method. Finally, the hydration of prepared cements with the clinkers was evaluated by isothermal microcalorimetry. It was found that by mixing paper sludge, cement kiln dust and ric

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14

Staněk, Theodor, Martin Boháč, and Petr Sulovský. "Chemical Activation of Dicalcium Silicate and its Use for Cement Production." Advanced Materials Research 1151 (March 2019): 17–21. http://dx.doi.org/10.4028/www.scientific.net/amr.1151.17.

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In this work, it was found out that dicalcium silicate doped with SO3 shows higher hydraulic activity compared to pure dicalcium silicate. This finding was used to prepare and optimize high-belite cement from SO3 doped clinkers. The belite cement exhibited the same technological parameters, including short-term strengths, as ordinary Portland cement with a high content of tricalcium silicate. The clinker for belite cement is environmentally and economically advantageous. It is possible to burn the clinker at a temperature of 100 °C lower than conventional clinker and with lower consumption of

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15

Cui, Jia Ping, Yu Liu, Zhi Hong Wang, et al. "Life Cycle Assessment of Cement Clinker Production Using Coal Gangue as Alternative Raw Material and Fuel." Materials Science Forum 814 (March 2015): 435–40. http://dx.doi.org/10.4028/www.scientific.net/msf.814.435.

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Life cycle assessment (LCA) was carried out to quantify and analyze the environmental impact and benefit caused by the utilization of coal gangue as alternative raw material and fuel in cement clinker production. The optimal dosage of coal gangue was determined by comparing among different mixing amount scenarios and Portland cement clinker (clinker without adding any waste) considering the phases of coal gangue disposal, transportation, and raw meal grinding and clinker calcination. The results showed that: 1) After adding coal gangue to the raw meal, almost all the considered environmental i

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16

Akhmetzhanov, Talgat, Gulmira Danenova, and Andrey Rusanov. "Optimization of Low-Clinker Binder Production Technological Parameters." Key Engineering Materials 683 (February 2016): 243–49. http://dx.doi.org/10.4028/www.scientific.net/kem.683.243.

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This paper presents an experimental investigation of the mechanochemical activation the low-clinker binder production systems on the basis of CaO and Ca(OH)2. It is shown that the effects of the mechanochemical interactions of the investigated components of low-clinked binders with the superplasticizer C-3 do not show a significant effect on the binders’- properties. The main influence is observed in the interaction of Portland cement and superplasticizer C-3. This study aimed to optimize the technological parameters of low-clinker binders’ production using different by-products. The expected

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17

Ostrowski, Mikołaj, Paweł Pichniarczyk, and Grzegorz Kądzielawski. "Ecological and technological effects of using concretes with low Portland clinker." MATEC Web of Conferences 322 (2020): 01021. http://dx.doi.org/10.1051/matecconf/202032201021.

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Concrete with a low Portland clinker content involves the use of mineral additives as a cement component or as a additive in a concrete mix. The main factors influencing the increasing use of mineral additives in concrete technology are the advantageous development of the functional properties of the concrete mix, hardened concrete and a large impact on the ecological effects, including reduction of CO2 emissions. The use of concrete with a low Portland clinker content is part of the strategy for sustainable development of the economy. This paper describes the technological and ecological effe

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18

Gomes, André Gonçalves, Tiago Assunção Santos, José da Silva Andrade Neto, and Daniel Véras Ribeiro. "Mineralogical Analysis of Portland Clinker Produced from the Incorporation of Granitic Rock Fines (GRF)." Key Engineering Materials 803 (May 2019): 309–13. http://dx.doi.org/10.4028/www.scientific.net/kem.803.309.

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Portland cement is the result of the calcination of a properly raw mix of limestone and clay, at high temperatures, and its manufacturing process is responsible for high environmental impacts, such as the exploitation of the deposits of these raw materials. In this context, the search for alternative raw materials becomes necessary. Thus, the present work analyzed the feasibility of the use of granite rock fines (GRF), waste generated in the process of production of aggregates for civil construction (gravel), aiming at the manufacture of Portland clinker. Firstly, the raw materials were charac

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19

Zhanikulov, N. N., T. M. Khudyakova, B. T. Taimassov, et al. "Receiving Portland Cement from Technogenic Raw Materials of South Kazakhstan." Eurasian Chemico-Technological Journal 21, no. 4 (2019): 333. http://dx.doi.org/10.18321/ectj890.

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A method of producing portland cement using the wastes of enrichment of polymetallic ores of "Achpolymetal" (Kentau, Kazakhstan) in the amount of 0.5 to 2.5% as a mineralizing additive in the raw mixture is proposed. This allows the clinker to be produced at a lower temperature (1300–1350 °C), resulting in lower fuel consumption and higher furnace productivity. The experimental clinker is better subjected to grinding, the electric power consumption for grinding cement decreases, the grinding bodies of cement mills decrease. In the waste, there are catalytic and modifying elements. Studies have

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20

Thomas, Michael, Laurent Barcelo, Bruce Blair, Kevin Cail, Anik Delagrave, and Ken Kazanis. "Lowering the Carbon Footprint of Concrete by Reducing Clinker Content of Cement." Transportation Research Record: Journal of the Transportation Research Board 2290, no. 1 (2012): 99–104. http://dx.doi.org/10.3141/2290-13.

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Significant efforts have been made to reduce carbon dioxide (CO2) emissions associated with the manufacture of portland cement, primarily by making the process more energy efficient and increasing the use of alternative fuels. Further reductions in CO2 can be achieved by lowering the clinker component of the cement because the pyroprocessing used to manufacture clinker produces approximately 1 tonne of CO2 for every tonne of clinker. Traditionally reductions in the clinker content of cement have been achieved by producing blended cement consisting of portland cement combined with a supplementa

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Oproiu, Carmen, Georgeta Voicu, Adrian Ionut Nicoara, and Alina Ioana Badanoiu. "The Influence of Partial Substitution of Raw Materials with Heavy Ash on the Main Properties of Portland Cements." Revista de Chimie 69, no. 4 (2018): 860–63. http://dx.doi.org/10.37358/rc.18.4.6216.

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The use of wastes in cement industry have impact both from economic and environmental point of views. Wastes can be used in clinker manufacture (to substitute raw materials or as alternative fuel) as well as supplementary cementitious materials in cement. This paper presents results regarding the use of heavy ash (bottom ash) as component of raw mix used for the clinker manufacture. Two types of cements were obtained by the milling of clinker produced with/without heavy ash (HA) as component of raw mix and gypsum (2%). The compressive strengths of these cements was assessed on plastic mortars

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Andrade, F. R. D., M. Pecchio, J. M. C. Santos, and Y. Kihara. "Portland clinker production with carbonatite waste and tire-derived fuel: crystallochemistry of minor and trace elements." Cerâmica 60, no. 356 (2014): 552–62. http://dx.doi.org/10.1590/s0366-69132014000400014.

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This paper presents results on the composition of Portland clinkers produced with non-conventional raw-materials and fuels, focusing on the distribution of selected trace elements. Clinkers produced with three different fuel compositions were sampled in an industrial plant, where all other parameters were kept unchanged. The fuels have chemical fingerprints, which are sulfur for petroleum coke and zinc for TDF (tire-derived fuel). Presence of carbonatite in the raw materials is indicated by high amounts of strontium and phosphorous. Electron microprobe data was used to determine occupation of

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Herfort, D., G. K. Moir, V. Johansen, F. Sorrentino, and H. Bolio Arceo. "The chemistry of Portland cement clinker." Advances in Cement Research 22, no. 4 (2010): 187–94. http://dx.doi.org/10.1680/adcr.2010.22.4.187.

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García-Lodeiro, I., A. Fernández-Jiménez, and A. Palomo. "Cementos híbridos de bajo impacto ambiental: Reducción del factor clinker." Revista ALCONPAT 5, no. 1 (2015): 1–17. http://dx.doi.org/10.21041/ra.v5i1.73.

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La problemática medioambiental en torno a la fabricación de cemento portland, ha llevado a la comunidad científica a buscar nuevos materiales cementantes alternativos, mas ecoeficientes, y con las mismas prestaciones tecnológicas que las del cemento portland tradicional, en este sentido se han desarrollado los cementos híbridos. Los cementos híbridos alcalinos son interesantes sistemas multicomponente que incorporan elevados contenidos de adiciones minerales (cenizas (FA), metacaolin (MK), escorias (BFS)…) y bajos contenidos de clinker portland (CK) (< 30 %), junto con activadores de modera

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Lima, Maria Margarida Rolim Augusto, L. F. C. Braz, Regina da Conceição Corredeira Monteiro, and J. P. Veiga. "Effect of Phosphogypsum on the Clinkerization Temperature of Portland Cement Clincker." Materials Science Forum 730-732 (November 2012): 94–99. http://dx.doi.org/10.4028/www.scientific.net/msf.730-732.94.

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Phosphogypsum (PG) is a pollutant residue resulting from the production of phosphoric acid in the phosphated fertilizers industry. About 180 millions of tons of PG are generated worldwide per year, which originates storage problems because of the environmental restrictions and the high costs of storage spaces. Taking into account the mineralizer properties of PG it has been studied a way to valorize this residue as an alternative material in the production of Portland cement clinker. The PG and the raw-materials (limestone, marl, sand and iron oxide) were chemical, mineralogical and thermally

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Suherman, Phe Man, Arie van Riessen, Brian O’Connor, Deyu Li, Dick Bolton, and Hans Fairhurst. "Determination of amorphous phase levels in Portland cement clinker." Powder Diffraction 17, no. 3 (2002): 178–85. http://dx.doi.org/10.1154/1.1471518.

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The existence of glass or amorphous component in Portland cement clinker has been questioned for a long time. However, besides the crystalline phases, there are reports in the literature of noncrystalline material in cement clinker, which is considered to be the residue of the melt that has failed to crystallize. Absolute phase abundances were determined in this study by Rietveld refinements with laboratory X-ray data, using both internal and external phase composition standards. The results clearly demonstrate the existence of an amorphous component in Portland cement clinker. The presence of

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Huang, Tingjie, Baiyun Li, Qiang Yuan, Zhenguo Shi, Youjun Xie, and Caijun Shi. "Rheological behavior of Portland clinker-calcium sulphoaluminate clinker-anhydrite ternary blend." Cement and Concrete Composites 104 (November 2019): 103403. http://dx.doi.org/10.1016/j.cemconcomp.2019.103403.

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Ferreira, Andréa Vidal, Ariete Righi, Fernando Gabriel Silva Araújo, Denise Crocce Romano Espinosa, and Jorge Alberto Soares Tenório. "Applications of the Rietveld method to quantify the crystalline phases of Portland cement clinker doped with nickel and chromium." Powder Diffraction 23, S1 (2008): S42—S45. http://dx.doi.org/10.1154/1.2903487.

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The effects of chromium or nickel oxide additions on the composition of Portland clinker were investigated by X-ray powder diffraction associated with pattern analysis by the Rietveld method. The co-processing of industrial waste in Portland cement plants is an alternative solution to the problem of final disposal of hazardous waste. Industrial waste containing chromium or nickel is hazardous and is difficult to dispose of. It was observed that in concentrations up to 1% in mass, the chromium or nickel oxide additions do not cause significant alterations in Portland clinker composition.

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Kulísek, Karel, Dominik Gazdič, Karel Dvořák, and Marcela Fridrichová. "The Use of FBC Fly Ash in the Preparation of Portland Cement Clinker." Key Engineering Materials 722 (December 2016): 168–72. http://dx.doi.org/10.4028/www.scientific.net/kem.722.168.

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The present work focuses on the use of fluid fly ash for Portland clinker burning. Fluid ashes are carriers of all basic oxides represented in the cement raw meal. However, while the share of hydraulic oxides is in ashes sufficient, there is a significant deficiency in calcium oxide content. Preliminary studies have shown that the combination thereof with calcite as the second essential component of the fluid fly-ashes for the raw material based on Portland clinker burning application, it is necessary to solve a problematic issues. The first one concerns the potential leakage SOx resulting fro

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Simão, L., N. J. Lóh, D. Hotza, F. Raupp-Pereira, J. A. Labrincha, and O. R. K. Montedo. "Thermal characterization of hydrated eco-friendly clinkers produced from pulp and paper mill waste." Cerâmica 64, no. 371 (2018): 311–17. http://dx.doi.org/10.1590/0366-69132018643712339.

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Abstract Industrial wastes from pulp and paper mills are potentially useful materials to use as alternative materials in clinker production. In this study, eco-friendly clinkers were obtained using only waste as feedstock. Eco-friendly clinker with different C3S and C2S contents were produced and hydrated for 7 days at 40 °C, or for 28 and 90 days at room temperature. The potentialities of these waste and the products obtained were revealed through chemical (XRF), thermal (DTA/TG) and surface area (BET) analysis. For comparison, a common ordinary Portland cement (OPC) was tested. As expected,

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Long, Shizong, Caixia Yan, and Jianmiao Dong. "Microwave-promoted burning of Portland cement clinker." Cement and Concrete Research 32, no. 1 (2002): 17–21. http://dx.doi.org/10.1016/s0008-8846(01)00622-6.

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Fukuda, K., S. Ito, and H. Taguchi. "Thermoelasticity of belite in Portland cement clinker." Cement and Concrete Research 28, no. 8 (1998): 1141–45. http://dx.doi.org/10.1016/s0008-8846(98)00085-4.

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Samchenko, Svetlana V., and D. A. Zorin. "Improving the Efficiency of Slag Portland Cement by Reducing Shrinkage Deformations." Materials Science Forum 992 (May 2020): 104–10. http://dx.doi.org/10.4028/www.scientific.net/msf.992.104.

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The influence of the artificial additive introduced at the joint grinding of granulated slag, Portland cement clinker and gypsum on the Portland slag cement hydration, its compression strength at an early stage and shrinkage deformation is investigated. It was found that in the presence of sulfoferrite clinker there is an amorphization of cement stone structure with formation of stone with high density and strength in early setting. The open porosity of the hardened paste is reduced by 13 – 15 % in comparison with plain Portland slag cement. The samples strength increases by 1.55 - 1.78 times

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FS, Hashem, Eisa E. Hekal, and Abdel M Wahab. "Effect propylene glycol as a quality improvers for Portland and Portland-limestone cements." International Journal of Petrochemical Science & Engineering 4, no. 1 (2019): 1–7. http://dx.doi.org/10.15406/ipcse.2019.04.00096.

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The performance of propylene glycol (PG) on the grindability, setting and hardening of Portland (OPC) and Portland-Limestone cements (PLC) was studied. Propylene glycol was added to OPC clinker with percentage ratios; 0, 0.03, 0.04 and 0.05 wt.% of the OPC clinker. PLC was made by replacing 5 and 10 wt. % of OPC with limestone. PG offers better grinding aid performance with higher Blaine areas. Besides, presence of PG shows higher water of consistency and lower initial and final setting times. The mechanical properties of mortar specimens made from OPC and PLC admixed with PG were improved esp

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FS, Hashem, Eisa E. Hekal, and Abdel M Wahab. "Effect propylene glycol as a quality improvers for Portland and Portland-limestone cements." International Journal of Petrochemical Science & Engineering 4, no. 1 (2019): 1–7. http://dx.doi.org/10.15406/ipcse.2019.04.00096.

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The performance of propylene glycol (PG) on the grindability, setting and hardening of Portland (OPC) and Portland-Limestone cements (PLC) was studied. Propylene glycol was added to OPC clinker with percentage ratios; 0, 0.03, 0.04 and 0.05 wt.% of the OPC clinker. PLC was made by replacing 5 and 10 wt. % of OPC with limestone. PG offers better grinding aid performance with higher Blaine areas. Besides, presence of PG shows higher water of consistency and lower initial and final setting times. The mechanical properties of mortar specimens made from OPC and PLC admixed with PG were improved esp

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Rudnov, V. S., V. A. Belyakov, and R. T. Galiakhmetov. "New Technology of White Portland Cement Production in the Ural Federal District." Solid State Phenomena 284 (October 2018): 1047–51. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.1047.

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In this article the results of research to develop energy - and resource-saving technologies of production on local raw material base of the Ural Federal district of the white portland cement with high performance are represented. An x-ray phase analysis of the obtained building material is performed. The possibility of obtaining white portland cement-based pyrophillite mining waste,the composition of the raw mix for high-temperature synthesis of clinker white portland cement at low temperatures was studied. This reduces the costs for grinding of the mixture, and firing the clinker. The result

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Kropyvnytska, Тetiana, Iryna Нeviuk, Roksolana Stekhna, Oksana Rykhlitska та Lidiia Deschenko. "EFFECT OF LIMESTONE POWDER ON THE PROPERTIES OF BLENDED РORTLAND CEMENTS". Theory and Building Practice 2021, № 1 (2021): 35–41. http://dx.doi.org/10.23939/jtbp2021.01.035.

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The article shows the relation between sustainability and cement manufacture that can be obtained by the replacement of clinker with limestone additive. This decreases the use of energy resources and reduces CO2 emissions in cement production. The issue of partial Portland cement clinker substitution by finely ground limestone in the production of market-oriented types of cement type CEM II is solved on the cement plant PJSC "Ivano-Frankivsk Cement". The indexes of physical-mechanical tests of certified Portland limestone cement with high early strength CEM II/A-LL 42.5 R produced by PJSC "Iva

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Chhaiba, S., M. T. Blanco-Varela, and A. Diouri. "Moroccan oil shale and coal waste as alternative raw materials in Portland cement clinker manufacture. Clinkerisation reactions and clinker characterisation." Materiales de Construcción 68, no. 331 (2018): 166. http://dx.doi.org/10.3989/mc.2018.07017.

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For some time the cement industry has been seeking procedures to effectively lower the higher energy costs involved in cement manufacture. Timahdit oil shale and Jerada coal waste could potentially be used as alternative raw materials to produce clinker. This study explored the possibility of applying those materials to a greener use, based on the reactivity and burnability of raw mixes containing Moroccan oil shale and coal waste. The findings showed that, irrespective of particle size, oil shale mixes delivered higher reactivity than coal waste materials, although reactivity was highest in t

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Yu, Li Bo, Zhi Ping Xu, Guo Wei Dong, and Yuan Na Zhu. "Effect of MoO₃ on the Clinkers Formation of Portland Cement." Advanced Materials Research 306-307 (August 2011): 1055–59. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.1055.

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The effects of MoO3additives on the clinkers mineral formation of portland cement were investigated by X-ray diffraction,scanning electron microscopy. One reference mixture and others modified mixtures, prepared by mixing the blank sample with chemical grade MoO3were studied. Based on experimental result, MoO3shows the less positive effect, MoO3added less than 1wt% was benefit for f-CaO absorbtion, but when more than 1wt% MoO3was added, with the temperature increasing, increasing the free CaO (f-CaO) content compared with the pure sample,which cound not promote the formation of 3CaO·SiO4. MoO3

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Zhao, Qi Gang, Zuo Ren Nie, Hong Liu, Su Ping Cui, and Ya Li Wang. "Utilization of Municipal Sludge in the Calcination of Cement Clinker." Materials Science Forum 814 (March 2015): 546–51. http://dx.doi.org/10.4028/www.scientific.net/msf.814.546.

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Using the sludge of sewage treatment plant to calcine cement clinker is a new method and is confirmed on the international to utilize city sludge recycling and harmlessly. In this work the test of the raw material burnability, cement clinker mineral composition and petrographic analysis were used to study microscopic characteristics of clinker, to analysis of the effect of sludge performance of cement clinker calcination. It was found that when sludge were as a raw material for calcining cement clinker, best city sludge content was around 15% ~ 20%. With an improvement of lime saturation coeff

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Wang, Yu Li, Wei Dong Wang, Yu Jie Zhao, and Su Xia Liu. "Influence of Limestone Powder on Immobilization of Chlorine Ion of Portland Cement." Advanced Materials Research 295-297 (July 2011): 1263–66. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1263.

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The effect of limestone powder on immobilization of chlorine ion of Portland cement was studied by the method of the chemical analysis. The immobilization of chlorine ion of Portland cement, which was hardened by cement clinker or cement clinker and gypsum mixed limestone powder with different proportions, was tested at 28d. The results show that the amount of immobilization of chlorine ion of Portland cement increases more than doubled, and the free chlorine ion content decreases 41% without gypsum, when the limestone powder content increases from 0% to 12%; the immobilization content of chlo

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Taimasov, B. T., B. K. Sarsenbayev, T. M. Khudyakova, A. S. Kolesnikov, and N. N. Zhanikulov. "Development and Testing of Low-Energy-Intensive Technology of Receiving Sulphate-Resistant and Road Portlandcement." Eurasian Chemico-Technological Journal 19, no. 4 (2017): 347. http://dx.doi.org/10.18321/ectj683.

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The article presents the obtaining results of clinkers of sulfate resistant and road cement during the production tests process. The usage of man-made wastes such as lead slag, coal mining waste as well as clay component and additives. X-ray, chemical analyzes of starting materials, clinkers and obtained cements were carried out. The regularities of charge compositions, saturation coefficient, modules, burning regimes on chemical and mineralogical composition and quality of clinkers and cements, improvement of rotary kiln operation, reduction of greenhouse gas emissions and fuel consumption ar

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Ma, Suhua, Dashun Ge, Weifeng Li, Yueyang Hu, Zhiqiang Xu, and Xiaodong Shen. "Reaction of Portland cement clinker with gaseous SO2 to form alite-ye'elimite clinker." Cement and Concrete Research 116 (February 2019): 299–308. http://dx.doi.org/10.1016/j.cemconres.2018.11.021.

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Szczerba, Jacek. "Calcium Zirconate as the Secondary Phase of Magnesia Refractories for Cement Rotary Kiln." Advances in Science and Technology 70 (October 2010): 15–20. http://dx.doi.org/10.4028/www.scientific.net/ast.70.15.

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The paper describes formation of the phases in magnesia-zirconia refractories due to reaction with the cement furnace charge in a form of pre-calcined meal or Portland clinker containing sulphur and chlorine in a different content at the temperature 1300°C and 1450°C. The studies were carried out by using the coating test. The microstructure changes of the contact zones between coating and the brick were studied by the scanning electron microscopy, SEM, coupled with EDS. The temperature dependence of reactivity the pre-calcined meal and Portland clinker in relation to the magnesia-zirconia bri

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Chen, Guang Li, Xing Hua Fu, and Wen Hong Tao. "Preparation of Low-Heat Portland Cement Clinker with Coal Gangue." Advanced Materials Research 306-307 (August 2011): 861–64. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.861.

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A kind of low-heat Portland cement clinker was prepared with coal gangue, limestone and gypsum through optimizing the mix proportion of raw materials, and its properties and hydration characteristics were studied. The results showed that the cement clinker meeting the demands of mid (low)-heat Portland cement standard could be prepared with 35% (by weight, the same below) coal gangue, 57-60% limestone and 6-8% gypsum. The raw materials were burned at 1380°C for 40 minutes. The main hydrates were calcium silicate hydrate (C-S-H) gel, ettringite (AFt), monosulfate (AFm) and Ca(OH)2.

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Nikolaev, A. P., and E. V. Kondrashchenko. "EFFICIENCY OF PLASTICIZER EFFECT DEPENDING ON METHOD OF THEIR INTRODUCTION INTO CONCRETE." Bulletin of Odessa State Academy of Civil Engineering and Architecture, no. 82 (March 4, 2021): 98–104. http://dx.doi.org/10.31650/2415-377x-2021-82-98-104.

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Abstract. The article dwells on existing methods of plasticizing additive introduction into Portland cement-based concrete mortars. A review was performed of available works studying the reasons of different effect of pasticizers depending on the method of their introduction into concrete. It was supposed that different results in effectiveness of such additives may be connected to not only adsorption processes taking place on the surface of Portland cement aluminate and sulfate phases, but also to their concentration capillary redistribution mechanism within concrete structure. This assumptio

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Jabbar, Nasr A., Ali Amer Alshammary, Ihsan Y. Hussain, and Luay S. Alansari. "Numerical Investigation of New Cooling Method for Clinker Flow in Opposite Direction with Airflow at Different Height Ratios." Key Engineering Materials 895 (August 3, 2021): 157–76. http://dx.doi.org/10.4028/www.scientific.net/kem.895.157.

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Several parameters affect the properties of Portland cement and one of these parameters is the cooling rate of the clinker. If the effectiveness of the cooling method of the clinker increases, a good enhancement in the properties of Portland cement will be found. Depending on the new cooling method suggestion by Nasr et. al. [20], the counter pattern of air clinker flow was studied using (FLUENT 6.3.26). The dimensions of the cooling room in grate cooler, the constant mass flow rate of both clinker and air, different height ratios, and different clinker porosity were considered in this numeric

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Yang, Dao Wu, Yi Liu, Yan Yao, and Hai Xia Tong. "Calorimetric Study of Flue Gas Desulfurization Gypsum as Set Retarders in Portland Cement." Advanced Materials Research 233-235 (May 2011): 673–76. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.673.

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The paper is focused on clarifying the influence of flue gas desulfurization (FGD) gypsum in replacing natural gypsum (NG) in the production of ordinary Portland cement (OPC). FGD gypsum was taken from Yi Yang power plant in Hunan, China. OPC clinker blends with 1–7 % of FGD gypsum to produce the binder of clinker/FGD gypsum. The properties of FGD gypsum was investigated via Chemical analysis, X-ray Diffraction (XRD), and differential thermal analysis (DTA)/thermogravimetric (TG) to evaluate the properties of binder. In present experiment, conduction calorimetry was applied to investigate the

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Kalina, Lukáš, Vlastimil Bílek, Lada Bradová, and Libor Topolář. "Blastfurnace Hybrid Cement with Waste Water Glass Activator: Alkali–Silica Reaction Study." Materials 13, no. 16 (2020): 3646. http://dx.doi.org/10.3390/ma13163646.

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Hybrid systems represent a new sustainable type of cement combining the properties of ordinary Portland cement and alkali-activated materials. In this study, a hybrid system based on blast furnace slag and Portland clinker was investigated. The economic aspects and appropriate waste management resulted in the usage of technological waste from water glass production (WG-waste) as an alkaline activator. Although the Portland clinker content was very low, the incorporation of this by-product significantly improved the mechanical properties. Nevertheless, the high amount of alkalis in combination

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Janowska-Renkas, Elżbieta, and Jolanta Kowalska. "Use of fly ash from fluidized bed boilers in clinker-slag-ash based binders." MATEC Web of Conferences 174 (2018): 02002. http://dx.doi.org/10.1051/matecconf/201817402002.

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The study presents the state of knowledge regarding physical and chemical properties, as well as trends for application of fly ashes from combustion in fluidized bed boilers in building materials. Clinker - slag - ash based binders were tested that contained up to 40 mass % of fly ashes from combustion in fluidized bed boilers. It was demonstrated that fluidized bed combustion fly ashes (FBC fly ash), apart from granular blast furnace slag, could be the ingredient of low clinker Portland cements (ca. 20% by mass). These cements, compared to CEM I Portland cement, have higher water demand and d

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