粉煤灰对煤矸石混凝土界面过渡区的改性效应

doi:10.11896/cldb.21050280

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Abstract In order to promote the use of coal gangue in the concrete production, the influence of different fly ash content (0%, 10%, 20%, 30%, 40%) on the structure of interfacial transition zone (ITZ) of coal gangue concrete (CGC), from two dimensions of macromechanics and micromechanics, revealed the modification mechanism of fly ash on microstructure and macroscopic properties of ITZ of CGC. Research shows that: in macroscopic mechanics, the splitting tensile strength of CGC could be improved by adding 30% fly ash. In micromechanics, 30% fly ash could significantly improve the hardness value of weak zone of ITZ, and made the hardness value became more uniform. When fly ash was added, the thickness of ITZ decreased obviously. This indicated that the appropriate fly ash has played a physicochemical role in the ITZ of CGC and changed the structure of ITZ.

Key words： fly ash coal gangue concrete mechanical property interface transition zone microhardness influence mechanism

Published: Online: 2023-02-08

CLC number:

TU528

Fund:National Natural Science Foundation Youth Fund of China (51808443), and Natural Science Basic Research Program of Shaanxi Province (2018JM5167).

Corresponding Authors: 358896111@qq.com

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	QIU Jisheng
	ZHU Mengyu
	ZHOU Yunxian
	GAO Xujun
	LI Leilei

Cite this article:

QIU Jisheng,ZHU Mengyu,ZHOU Yunxian, et al. Modification Effect of Fly Ash on Interfacial Transition Zone of Coal Gangue Concrete[J]. Materials Reports, 2023, 37(2): 21050280-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21050280 OR http://www.mater-rep.com/EN/Y2023/V37/I2/21050280

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