磨细凝灰岩制备机制砂混凝土力学性能研究

doi:10.11896/cldb.24030199

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Abstract In this work, the variation of working performance, compressive and flexural strength of machine-made sand concrete were studied through the changes in gelation composition such as tuff powder content (0%, 10%, 20%, 30%, 40%), tuff powder fineness (5.58%, 6.98%, 7.56% and 9.23%) and compound mixing of fly ash and mineral powder. SEM, XRD, NMR and other analytical techniques were used to study the hydration products and pore structure of tuff-mixed pulverized concrete. The test results show that as the amount of tuff powder increases, the slump of concrete increases first and then decreases, the compressive and flexural strength decreases, and the pore size increases greatly. The fineness of tuff powder has a slight effect on the working performance, compressive and flexural properties. The compound mixing of fly ash and mineral powder can improve the mechanical strength of concrete of 28 d and increase the number of small holes, but the number of large holes also increases due to the large gradation distribution of fly ash and mineral powder.

Key words： tuff manufactured sand concrete mechanical property rock powder

Published: 10 May 2025 Online: 2025-04-28

CLC number:

TU528

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	Articles by authors
	XIA Yijian
	ZHANG Yu
	ZHANG Yunsheng
	ZHU Weiwei
	ZHU Wenxuan

Cite this article:

XIA Yijian,ZHANG Yu,ZHANG Yunsheng, et al. Mechanical Properties of Machine-made Sand Concrete Prepared from Finely Ground Tuff[J]. Materials Reports, 2025, 39(9): 24030199-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24030199 OR https://www.mater-rep.com/EN/Y2025/V39/I9/24030199

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