单面盐冻条件下基于孔结构的玄武岩纤维混凝土抗压强度模型

doi:10.11896/cldb.19040245

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Abstract In this paper, the effects of different basalt fiber content and freeze-thaw times on the frost resistance and pore structure of concrete were stu-died through the single-side freeze-thaw cycle test. Grey entropy method was used to analyze the influence of pore structure parameters on the compressive strength of concrete after freeze-thaw cycles.The contribution rate formula of basalt fiber under different freeze-thaw cycles was obtained by fitting. The compressive strength model was established based on multiple factors such as pore specific surface area, pore volume and basalt fiber contribution rate. The results showed that the compressive strength of the different fiber contents specimens decreased with the increase of freeze-thaw cycles, the air content, average pore chord length and pore spacing coefficient of specimens increased with the increase of freeze-thaw cycles, and the specific surface area of pores decreased with the increase of freeze-thaw cycles. In this test, the frost resistance of concrete is optimal when the fiber content is 0.2vol%. According to the grey entropy analysis, the correlation degree of compressive strength with the pore specific surface area and pore diameter of less than 100 μm is the highest.The regression effect of the compressive strength and the specific surface area of pores, pore volume and the contribution rate of basalt fiber is significant, which can predict the quantitative relationship between the compressive strength of basalt fiber concrete and the pore structure after the single-side freeze-thaw cycle test, and evaluate the durability of basalt fiber concrete in cold areas.

Key words： basalt fiber concrete single-side freeze-thaw cycle grey entropy compressive strength model

Published: 29 May 2020

CLC number:

TU528

Fund:This work was financially supported by the National Natural Science Foundation of China (11762015,11362013).

About author:: Yanru Zhao is professor and supervisor of mechanics doctoral student, supervisor of civil engineering master. She currently works in department of architectural engineering, School of Civil Engineering, Inner Mongolia University of Technology. The mechanical properties and durability of concrete, electron beam moire technology and its application and the interface mechanical properties of fiber reinforced composites were main studied.

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	ZHAO Yanru
	LIU Fangfang
	WANG Lei
	GUO Zilin

Cite this article:

ZHAO Yanru,LIU Fangfang,WANG Lei, et al. Modeling of the Compressive Strength of Basalt Fiber Concrete Based on Pore Structure Under Single-side Freeze-Thaw Condition[J]. Materials Reports, 2020, 34(12): 12064-12069.

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http://www.mater-rep.com/EN/10.11896/cldb.19040245 OR http://www.mater-rep.com/EN/Y2020/V34/I12/12064

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