粒状煤矸石制备活性粉体材料的颜色转变及其量化表征

doi:10.11896/cldb.19090050

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Abstract The coal gangue (CG) can be prepared into active mixture material after it was calcined at suitable temperature and then ground. However, due to the complex composition of CG, its color changed greatly after it was calcined. The application of large amount of calcined coal gangue (CCG) in cement-based materials will affect the color of cement-based materials. It is of great significance for the application of CG in cement industry if CCG active powder material with small color difference from cement-based materials can be prepared. In this paper, the influence of preparation process on the color of CCG active powder material was explored; the color of CCG active powder materials was quantitatively characterized and evaluated based on Red, Green, Blue value in PS software; the mechanism of color transition of active powder materials prepared from granular coal gangue was analyzed. The results showed that, during the thermal activation, the redder the color of CCG active powder materials and the higher their Red value were beneficial to the smaller of CG, the longer the holding time of thermal activation and the more sufficient the oxygen in the calcination environment. The oxidation degree of carbon and siderite in CG was the main reason that affects the color of CCG active powder materials. When the black carbon was removed sufficiently and siderite was oxidized to hematite, the color of the material was red, but when carbon was not removed sufficiently and siderite was oxidized to magnetite, the color of the material was black.

Key words： granular coal gangue active powder material color transition quantitative characterization

Published: 24 July 2020

CLC number:

TU528.041

Fund:This work was financially supported by the National Natural Science Foundation of China (51778003, 51608004), Key Research and Development Projects in Anhui Province (202004611020033), Natural Science Foundation of Anhui Provincial Education Department (KJ2019JD16), Initial Scientific Research Fund of Anhui Jianzhu University (2019QZ15).

About author:: Peng Liureceived his M.S. degree in June 2019 from Anhui Jianzhu University. He is currently entered Nanjing Tech University for his Ph.D. degree, focusing on the research of functional building materials and utilization of solid wastes.
Aiguo Wangreceived his Ph.D. degree in materials from Nanjing Tech University in 2010. He performed his visting researches in University of Southern Queensland, Centre for Future Materials of Australia in 2017. He has been an associate professor and masterial tutor from 2013 in Anhui Jianzhu University. He has hosted and participated in 10 provincial or ministerial level research projects including National Natural Science Foundation of China, Natural Science Foundation of Higher Education of Anhui Province, Open Project of State Key Laboratoryof High Performance Civil Engineering Materials, and Open Project of State Key Laboratory of Materials and Chemical Engineering, and so on. He assumes reviewer of journals like Construction and Building Materials, Cement and Concrete Composites, Cement and Concrete Composites, Materials Review, Bulletin of the Chinese Ceramic Society. He is also the Member of Professional Committee of Chemically Induced Cementitious Materials of China Architecture Society Building Materials Branch. His major interstes are high perfor-mances cementitious composite materials, building functional materials & comprehensive utilization of solid waste.

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	LIU Peng
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	SUN Daosheng
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Cite this article:

LIU Peng,WANG Aiguo,LIU Kaiwei, et al. Color Transition and Its Quantitative Characterization of Active Powder Material Prepared from Granular Coal Gangue[J]. Materials Reports, 2020, 34(16): 16037-16042.

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http://www.mater-rep.com/EN/10.11896/cldb.19090050 OR http://www.mater-rep.com/EN/Y2020/V34/I16/16037

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