混杂纤维高强轻骨料混凝土单轴受压试验研究

doi:10.11896/cldb.22040204

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Abstract In order to improve the brittle failure characteristics of high strength lightweight aggregate concrete (HSLC), steel fiber (SF) and polypropy-lene fiber (PF) were used to strengthen HSLC. The effects of the two fibers on the uniaxial compression performance of HSLC were studied through uniaxial compression tests. The results show that when the volume content of SF and PF is 2.0% and 0.2%, respectively, there is the best hybrid effect. The stress at the inflection point and the strain at the convergence point of the stress-strain curve increased by 10.0% and 56.5% respectively compared with that of SF alone, and increased by 99.1% and 150% respectively compared with that of PF alone; the peak stress, peak strain and elastic modulus of HSLC increased by 19.0%, 1.20% and 16.9% respectively. Finally, based on the test data, the calculation formulas of peak stress, peak strain and elastic modulus considering the hybrid effect of two fibers are proposed, and the uniaxial compression constitutive model of hybrid fiber reinforced HSLC with two parameters is established, which is in good agreement with the test curve. The results can provide theoretical reference for the structural design of fiber reinforced HSLC.

Key words： hybrid fiber high strength lightweight aggregate concrete stress-strain curve hybrid effect constitutive model

Published: 25 January 2024 Online: 2024-01-26

CLC number:

TU528

Fund:Major Special Projects in Liaoning Province (2020JH1/10300005).

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	Articles by authors
	CUI Taotao
	NING Baokuan
	GAO Dianwei
	XIA Xudong

Cite this article:

CUI Taotao,NING Baokuan,GAO Dianwei, et al. Experimental Study on Hybrid Fiber High Strength Lightweight Aggregate Concrete Under Uniaxial Compression[J]. Materials Reports, 2024, 38(2): 22040204-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22040204 OR http://www.mater-rep.com/EN/Y2024/V38/I2/22040204

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