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Journal articles on the topic 'Hydration advancement of C3S and C3A'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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1

Qi, Tianqi, Wei Zhou, Xinghong Liu, Qiao Wang, and Sifan Zhang. "Predictive Hydration Model of Portland Cement and Its Main Minerals Based on Dissolution Theory and Water Diffusion Theory." Materials 14, no. 3 (2021): 595. http://dx.doi.org/10.3390/ma14030595.

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Efficient and accurate cement hydration simulation is an important issue for predicting and analyzing concrete’s performance evolution. A large number of models have been proposed to describe cement hydration. Some models can simulate the test results with high accuracy by constructing reasonable functions, but they are based on mathematical regression and lack of physical background and prediction ability. Other models, such as the famous HYMOSTRUC model and CEMHYD3D model, can predict the hydration rate and microstructure evolution of cement based on its initial microstructure. However, this
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2

Tan, Hong Bo, Bao Guo Ma, Kai Ke, and Jun Xiao. "Mechanism of Preferential Adsorption of Carboxylic-Vinyl Copolymer, Hydroxy Carboxylate and Sulfonation - Polyol in Cement Hydration Process." Advanced Materials Research 194-196 (February 2011): 1035–40. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.1035.

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In the ternary system of hydroxy carboxylate (HC), sulfonation-polyol (SP) and carboxylic-vinyl copolymer (PC), HC and SP preferentially adsorb on the surface of particles to shield the initial hydration. In this way, the ternary system has excellent dispersibility and holding dispersibility, and it has little effect on later hydration. By means of the chemical shrinkage, SEM and XRD analysis, the hydration mechanism of the hydroxy carboxylate (HC) and sulfonation-polyol (SP) has been discussed and the preferential adsorption model (PAM) has been established. The results show that HC delays th
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3

Zhao, Quan, Jianwei Tu, Weiwei Han, Xi Wang, and Youzhi Chen. "Hydration Properties of Portland Cement Paste with Boron Gangue." Advances in Materials Science and Engineering 2020 (March 16, 2020): 1–9. http://dx.doi.org/10.1155/2020/7194654.

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In order to prepare a good radiation shielding concrete with a proper setting time and a high strength, the hydration properties of cement with boron gangue were investigated by the methods of XRD, isothermal microcalorimetry, TG/DSC, and FTIR. The results demonstrated that it was mainly related to the insoluble matter CaB2O4·4H2O and Ca(H2BO3)2·4H2O that boron gangue could severely inhibit the cement hydration. Boron gangue made a significant retardation on Portland cement hydration with the form of BO33− and BO45−, which caused an obvious retardation of C3A and C3S hydration with an insolubl
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4

Aouni, E. El. "The effect of C3S on the early hydration of C3A." Journal of Thermal Analysis 45, no. 6 (1995): 1349–57. http://dx.doi.org/10.1007/bf02547429.

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5

Du, Lang, Xiang Zhou, Liang Li, Yu Xiang Li, and Xue Ma. "Influence of Uranium on the Hydration Properties of the Cement Clinker Minerals." Materials Science Forum 1036 (June 29, 2021): 199–207. http://dx.doi.org/10.4028/www.scientific.net/msf.1036.199.

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The influence of uranium simulated waste water on the hydration properties of the cement was studied by modern test methods such as TAM air, XRD, FTIR, and SEM-EDS. The results show that uranium can promote the hydration of mineral C3S, and inhibit the hydration of mineral C3A. By comparing scanning of hydration products, it was found that the existence of uranium significantly changed the morphology of clinker hydration products , but uranium had little effect on the type of clinker hydration product.
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6

Boháč, Martin, Radoslav Novotný, Jiří Másilko, et al. "Hydration of Synthetized Clinker Phases C3S and C3A with Metakaolin in Isothermal Conditions." Advanced Materials Research 1124 (September 2015): 23–30. http://dx.doi.org/10.4028/www.scientific.net/amr.1124.23.

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Heat flow development during initial hydration of fresh pastes based on mixtures of pure clinker phases C3S and C3A with metakaolin was investigated by means of isothermal calorimetry. Phase composition development was examined by "in situ" X-ray diffraction technique. Obtained results from calorimetric measurements and X-ray diffraction were correlated with recent studies in field of hydration of cementitious systems. The effect of co-sintering of clinker phases on early hydration was characterized by isothermal calorimetry.
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7

Lu, Tong Wei, Fei Xiao, Lei Guo, and Gui Bo Gao. "Performances Study and Accelerating Mechanism Analysis of New-Type Alkali-Free Efficient Liquid Setting Accelerator." Applied Mechanics and Materials 584-586 (July 2014): 1652–58. http://dx.doi.org/10.4028/www.scientific.net/amm.584-586.1652.

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This paper introduces a new-type alkali-free and chlorine-free high performance liquid accelerated admixture. The accelerated agent is mainly composed of the following components: fluoride magnesium aluminum silicate is main accelerator, alcohol amine polymer is activator, and amide polymer is stabilizer. When dosage of the admixture is greater than 4%, the cement initial setting time is less than 5 min, the final setting time is less than 10 min, and the 28 day compressive strength ratio of mortar is more than 100%. The mechanism is the accelerating of agent on hydration of C3A and C3S. There
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8

He, Tingshu, Chen Shi, Guoxin Li, and Xuefeng Song. "Effects of superplasticizers on the carbonation resistance of C3S and C3A hydration products." Construction and Building Materials 36 (November 2012): 954–59. http://dx.doi.org/10.1016/j.conbuildmat.2012.06.071.

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9

Ma, Bao Guo, Jun Xiao, and Hong Bo Tan. "Citric Acid on the Hydration Mechanism of Cement." Advanced Materials Research 413 (December 2011): 174–79. http://dx.doi.org/10.4028/www.scientific.net/amr.413.174.

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This article reports on the study to evaluate the hydration process of cement by the addition of citric acid. Through the test of citric acid of cement paste, hydration heat performance, resistivity, chemical shrinkage, and combined with XRD, SEM, DSC-TG discusses the influence of citric acid on cement hydration process. The results thus obtained were compared to the hydration process of cement with the blank sample and vary of dosage of citric acid. The results show that: The early hydration about 1~2 h resistivity increases, dissolve balance stage was extended; The chemical shrinkage increas
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10

Ma, Bao Guo, Jun Xiao, and Hong Bo Tan. "Effect of Citric Acid on Cement Hydration." Advanced Materials Research 393-395 (November 2011): 49–53. http://dx.doi.org/10.4028/www.scientific.net/amr.393-395.49.

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Through the test of citric acid of cement paste, setting time and compression strength changes, and combined with XRD, SEM, discusses the influence of citric acid on cement hydration process. The results show that: citric acid can effectively increase the initial cement fluidity, when the content is exceed to 0.1%, the 60 min flow loss of increased gradually. Citric acid retarding effect increases with dosage, but there is a critical dosage, when the dosage is less than 0.1%, the initial setting time and final setting time increased slowly; When the dosage more than 0.1%, the initial setting t
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11

Jakubeková, D., P. Štibraný, and D. Frtalová. "Investigation of the effects of diethylene glycol on the hydration of C3S and C3A pastes." Journal of Thermal Analysis 33, no. 3 (1988): 651–59. http://dx.doi.org/10.1007/bf02138569.

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12

Pichniarczyk, Paweł. "The Influence of Methylcellulose on the Hydration Process of C3S, C3A and Mixture of these Phases." Procedia Engineering 108 (2015): 220–30. http://dx.doi.org/10.1016/j.proeng.2015.06.141.

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13

Pang, Xiao Fan, Zi Ming Wang, He Qing Shen, and Long Xue. "Putting Cement to Sleep with Sucrose and Waking it up with Ca(OH)2." Materials Science Forum 898 (June 2017): 2004–9. http://dx.doi.org/10.4028/www.scientific.net/msf.898.2004.

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In this work, the effects of sucrose on setting time, heat of hydration and hydration products were studied, and the corresponding hydration process and regulation mechanism were discussed. With the adsorption test of sucrose on Ca (OH)2 suspensions, the “wake up” mechanism of Ca (OH)2 on sucrose-retarded cement was discussed. The results indicate that sucrose is used as retarder to increase the dormant period by adsorption to the cement surface, but there exists a critical amount of sucrose. And the XRD patterns indicate that sucrose can accelerate the reaction of C3A and the formation of AFt
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14

Tomita, Yusuke, Akira Yoneyama, Heesup Choi, et al. "Evaluation of Mechanical and Shrinkage Behavior of Lowered Temperatures Cementitious Mortars Mixed with Nitrite–Nitrate Based Accelerator." Materials 13, no. 17 (2020): 3686. http://dx.doi.org/10.3390/ma13173686.

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Recently, calcium nitrite (Ca(NO2)2) and calcium nitrate (Ca(NO3)2) have been increasingly used as the main components of salt- and alkali-free anti-freezing agents, for promoting concrete hydration in cold-weather concreting. With an increase in the amount of nitrite-based accelerator, the hydration of C3A, C3S, and βC2S in the cement is accelerated, thereby improving its early strength and effectively preventing the initial frost damage. Meanwhile, with an increase in the amount of nitrite-based accelerator, the expansion and shrinkage of the concrete—and, therefore, the crack occurrence—are
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15

Yoneyama, Akira, Heesup Choi, Masumi Inoue, Jihoon Kim, Myungkwan Lim, and Yuhji Sudoh. "Effect of a Nitrite/Nitrate-Based Accelerator on the Strength Development and Hydrate Formation in Cold-Weather Cementitious Materials." Materials 14, no. 4 (2021): 1006. http://dx.doi.org/10.3390/ma14041006.

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Recently, there has been increased use of calcium-nitrite and calcium-nitrate as the main components of chloride- and alkali-free anti-freezing agents to promote concrete hydration in cold weather concreting. As the amount of nitrite/nitrate-based accelerators increases, the hydration of tricalcium aluminate (C3A phase) and tricalcium silicate (C3S phase) in cement is accelerated, thereby improving the early strength of cement and effectively preventing initial frost damage. Nitrite/nitrate-based accelerators are used in larger amounts than usual in low temperature areas below −10 °C. However,
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16

Kim, Ho-jin, Hyeonggil Choi, Heesup Choi, Bokyeong Lee, Dongwoo Lee, and Dong-Eun Lee. "Study on Physical Properties of Mortar for Section Restoration Using Calcium Nitrite and CO2 Nano-Bubble Water." Materials 13, no. 17 (2020): 3897. http://dx.doi.org/10.3390/ma13173897.

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This study investigated the physical properties of section-restoration mortar with calcium nitrite (Ca(NO2)2) and carbon dioxide (CO2) nanobubble mixing water to develop materials and methods for the repair and reinforcement of cracks in reinforced concrete (RC) structures. As the calcium nitrite content increased, the generation rate and generated amount of nitrite-based hydration products also increased, owing to the rapid reaction between NO2− ions in calcium nitrite and C3A(Al2O3). Further, the reaction with C3S and C2S was accelerated, thereby increasing the generation rates of Ca(OH)2 an
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17

Pinto, Andrés Felipe, Jorge Iván Tobón, Natalia Betancur-Granados, and Oscar Jaime Restrepo-Baena. "Evaluation of the reactivity of artificial mixtures of Portland cement clinker obtained by flame spray pyrolysis." Material Science Research India 16, no. 2 (2019): 110–17. http://dx.doi.org/10.13005/msri/160204.

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The Portland cement clinker consists of 95% calcium oxide, silicon, aluminium and iron and 5% impurities of magnesium, sodium, potassium, titanium, sulfur, phosphorus and manganese. From the combination of two or more of the main oxides, the constituents of the white clinker are formed, corresponding to alite(3CaO.SiO2 or C3S), belite (2CaO.SiO2 or C2S) and celite (Ca3Al2O6 or C3A), which give cement its characteristic properties. The fundamental properties of cement are its mechanical resistance, chemical resistance, the speed of reaction with water and the heat given off in hydration. In thi
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18

Choi, Heesup, Masumi Inoue, Hyeonggil Choi, et al. "Physicochemical Study on the Strength Development Characteristics of Cold Weather Concrete Using a Nitrite–Nitrate Based Accelerator." Materials 12, no. 17 (2019): 2706. http://dx.doi.org/10.3390/ma12172706.

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There has recently been an increased use of anti-freezing agents that are primarily composed of salt- and alkali-free calcium nitrite (Ca(NO2)2) and calcium nitrate (Ca(NO3)2) to promote the hydration reaction of concrete in cold weather concreting. Nitrite–nitrate based accelerators accelerate the hydration of C3A and C3S in cement more quickly when their quantities are increased, thereby boosting the concrete’s early strength and effectively preventing early frost damage. However, the connection between the hydrate formation behavior and the strength development characteristic over time has
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19

Wang, Qiang, Geng Yao, Xiangnan Zhu, Junxiang Wang, Peng Wu, and Xianjun Lyu. "Preparation of Portland Cement with Gold Ore Tailings." Advances in Materials Science and Engineering 2019 (May 6, 2019): 1–9. http://dx.doi.org/10.1155/2019/1324065.

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The disposal of gold ore tailings (GTs) has been a very difficult problem for a long time. Thus, this study explored a new approach to the management of GTs by preparing Portland cement. Physical properties, reaction mechanisms, and hydration product types of cement prepared with GTs (C-GTs) and ordinary Portland cement (C-SS) were compared. X-ray diffraction (XRD), thermogravimetric (TG), and scanning electron microscope energy-dispersive spectroscopy (SEM-EDS) analysis techniques were used to study the mineralogical phases of the clinker and raw materials, hydration product types, and microt
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20

Ede, Anthony N., Oluwarotimi Michael Olofinnade, Akpabot Ifiok Akpabot, Solomon O. Oyebisi, and David O. Nduka. "Influence of Dicalcium Silicate and Tricalcium Aluminate Compounds in Different Local Cement Brands on the Compressive Strength of Normal Concrete." Solid State Phenomena 318 (May 2021): 59–69. http://dx.doi.org/10.4028/www.scientific.net/ssp.318.59.

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The mould-ability of concrete into intricate forms and the versatility of its constituent materials has made concrete to be the most preferred construction material. However, in developing nations such as Nigeria, poor quality of concrete is listed among the common causes of building collapse. Thus, this study investigated the effects of chemical compounds of four commonly used local ordinary Portland cement brands on the compressive strength of normal concrete. The cement was labelled brands A, B, C, and D, respectively, while all the other constituent materials remained constant in this stud
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21

Evangelista, L., M. Guedes, A. C. Ferro, and J. de Brito. "Microstructure of concrete prepared with construction recycled aggregates." Microscopy and Microanalysis 19, S4 (2013): 147–48. http://dx.doi.org/10.1017/s1431927613001359.

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Conservation of natural resources, shortage of waste land and the high cost associated to treatment prior to disposal are driving growing interest in the recycling of construction and demolition waste materials (CDW). A challenging application for recycled CDW is the replacement of natural aggregates in the production of structural concrete. In the past few years several studies have examined the viability of this substitution. Although recycled aggregates are mostly heterogeneous, less dense and more porous than natural aggregates, satisfactory results have been attained by several authors re
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22

Regourd, M. "A Review of the use of Proton Magnetic Resonance to Study Superplasticizers." MRS Proceedings 85 (1986). http://dx.doi.org/10.1557/proc-85-245.

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ABSTRACTProton pulse nuclear magnetic resonance can be used to follow the hydration of C3S and C3A, individually and mixed, with and without gypsum and superplasticizers. The variation of the spin-lattice relaxation time from early ages up to the times of setting and hardening is related first to the mobility of water molecules in rapid exchange, then to the progress of solid-water interfaces.Plasticizers act as retarders to lengthen the induction period. They behave differently with pure phases taken separately than with mixtures, in which a mutual interaction of C3S, C3A, gypsum and admixtur
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23

He, Tingshu, Renhe Yang, Xinqi Guo, Rongsheng Xu, Yongqi Da, and Xuna Fan. "Effects of liquid accelerators on carbonation properties of C3A and C3S hydration products." Advances in Cement Research, September 30, 2020, 1–10. http://dx.doi.org/10.1680/jadcr.19.00135.

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24

Timoshenko, T. I., A. Zalogina, and V. Hudasov. "INFLUENCE OF ZnO AND BaSO4 ADDITIVES ON CONSTRUCTION AND TECHNICAL PROPERTIES OF THE WEAK BASE WHITE CEMENTS." Construction Materials and Products, June 1, 2020, 17–24. http://dx.doi.org/10.34031/2618-7183-2018-1-3-17-24.

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white cement – modern construction material which is increasingly popular every year as it is used not only in the construction sphere, but also and in creation of architectural products.
 Today the most famous producers of white cement is Turkey, Denmark and Egypt. Special color of cement is reached due to specific structure and the specialized production technology. Clinker for the white portlandtsement, differs from usual in the increased maintenance of Si2O (23.5-25.5%) and A12O3 (5.5-7%), insignificant quantity of Fe2O3 (up to 0.25-0.35%) and MnO – 0.05-0.15%. The mineral composition
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