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Your search keyword '"Teng Xiaojuan"' showing total 4 results
Start Over Author "Teng Xiaojuan" Topic fly ash
4 results on '"Teng Xiaojuan"'

1. Investigating the influence of fly ash on the hydration behavior of cement using an electrochemical method

Author

Luping Tang, Jianchao Zhang, Biqin Dong, Li Gui, Shuxian Hong, Weiwen Li, Feng Xing, and Teng Xiaojuan

Subjects
musculoskeletal diseases, Cement, Materials science, fungi, technology, industry, and agriculture, 0211 other engineering and technologies, 020101 civil engineering, Blended cement, 02 engineering and technology, Building and Construction, Electrochemistry, Positive correlation, 0201 civil engineering, Dielectric spectroscopy, Compressive strength, Fly ash, 021105 building & construction, General Materials Science, Composite material, Civil and Structural Engineering
Abstract

Fly ash is an industrial by-product that is widely used in the cement industry. Traditional methods used to investigate the influence of fly ash on the hydration behavior of cement are destructive and cannot accomplish a continuous tracing of the hydration process. In this study, the influence of fly ash incorporation on the hydration process of cement is evaluated using measured electrochemical data obtained from the electrochemical impedance spectroscopy approach. A novel equivalent circuit model that considers the electrochemical characteristics of cement during the hydration process is proposed to investigate the electrochemical property of the blended cement. The resistance parameter of the model, Rct1, was found to have a positive correlation with hydration degree and compressive strength during hydration. With this parameter, the method can be used to non-destructively trace and characterize the effects of fly ash incorporation on the cement hydration process.

Published
2019

2. Investigation of the Cl− migration behavior of cement materials blended with fly ash or/and slag via the electrochemical impedance spectroscopy method

Author

Zhaotao Zhuang, Shuxian Hong, Jianchao Zhang, Biqin Dong, Feng Xing, Teng Xiaojuan, Yusheng Wu, and Zhentao Gu

Subjects
Cement, Materials science, Ion migration, 0211 other engineering and technologies, Slag, 020101 civil engineering, 02 engineering and technology, Building and Construction, Chloride, 0201 civil engineering, Corrosion, Dielectric spectroscopy, Chemical engineering, Fly ash, visual_art, 021105 building & construction, medicine, visual_art.visual_art_medium, Equivalent circuit, General Materials Science, Civil and Structural Engineering, medicine.drug
Abstract

The chloride-induced corrosion of reinforcement in concrete is a serious problem. In this study, the chloride ion migration in cement materials blended with fly ash or/and slag is studied by the electrochemical impedance spectroscopy (EIS) method. A novel equivalent circuit model Rs(Q1(Rct1W1))(Q2(Rct2W2)) is established to analyze the chloride ion migration. The results indicate that increasing the amount of fly ash or/and slag enhances the resistance to chloride ion migration. The chloride ion migration depth can be qualified by an equation that is a function of the parameter (Rct1) of the circuit model. With this function, the chloride ion migration depth in cement materials replaced with fly ash or/and slag can be predicted by EIS method.

Published
2019

3. Investigation of the Cl− migration behavior of cement materials blended with fly ash or/and slag via the electrochemical impedance spectroscopy method.

Author

Dong, Biqin, Wu, Yusheng, Teng, Xiaojuan, Zhuang, Zhaotao, Gu, Zhentao, Zhang, Jianchao, Xing, Feng, and Hong, Shuxian

Subjects
*FLY ash, *IMPEDANCE spectroscopy, *CHLORIDE ions, *ION migration & velocity, *CEMENT, *CONCRETE corrosion, *SLAG
Abstract

Highlights • EIS method is applied to characterize the chloride ion migration in cement. • The fly ash or/and slag will improve the resistance to chloride ion migration. • The chloride ion migration depth can be predicted by the EIS model parameter R ct1. Abstract The chloride-induced corrosion of reinforcement in concrete is a serious problem. In this study, the chloride ion migration in cement materials blended with fly ash or/and slag is studied by the electrochemical impedance spectroscopy (EIS) method. A novel equivalent circuit model R s (Q 1 (R ct1 W 1))(Q 2 (R ct2 W 2)) is established to analyze the chloride ion migration. The results indicate that increasing the amount of fly ash or/and slag enhances the resistance to chloride ion migration. The chloride ion migration depth can be qualified by an equation that is a function of the parameter (R ct1) of the circuit model. With this function, the chloride ion migration depth in cement materials replaced with fly ash or/and slag can be predicted by EIS method. [ABSTRACT FROM AUTHOR]

Published
2019
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4. Investigating the influence of fly ash on the hydration behavior of cement using an electrochemical method.

Author

Zhang, Jianchao, Dong, Biqin, Hong, Shuxian, Teng, Xiaojuan, Li, Gui, Li, Weiwen, Tang, Luping, and Xing, Feng

Subjects
*FLY ash, *HYDRATION, *CEMENT, *IMPEDANCE spectroscopy, *COMPRESSIVE strength, *CEMENT industries
Abstract

• The influence of fly ash on the hydration behavior of cement is investigated by EIS method. • Increases in R ct1 shows good correlation with the progress of hydration degree of blended cement. • R ct1 value of the blended cement will ultimately increase compared to the cement without fly ash. Fly ash is an industrial by-product that is widely used in the cement industry. Traditional methods used to investigate the influence of fly ash on the hydration behavior of cement are destructive and cannot accomplish a continuous tracing of the hydration process. In this study, the influence of fly ash incorporation on the hydration process of cement is evaluated using measured electrochemical data obtained from the electrochemical impedance spectroscopy approach. A novel equivalent circuit model that considers the electrochemical characteristics of cement during the hydration process is proposed to investigate the electrochemical property of the blended cement. The resistance parameter of the model, R ct1 , was found to have a positive correlation with hydration degree and compressive strength during hydration. With this parameter, the method can be used to non-destructively trace and characterize the effects of fly ash incorporation on the cement hydration process. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

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