菌丝–砂复合轻质土的静力强度特性研究

doi:10.13722/j.cnki.jrme.2024.0105

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Abstract Lightweight geomaterials obtained by mixing expanded polystyrene(EPS) or waste tires(WTS) with soil are widely used in geotechnical engineering，but lightweight materials(such as EPS) can be harmful to the environment. In recent years，the mycelium bio-composites lightweight soil(P. ostreatus MBLS)，which is composed of wheat bran(lightweight material or substrate material)，sand(aggregate)，and Pleurotus ostreatus(cementing material)，has attracted wide attention due to the advantages of its lightweight and non-pollution. In this paper，a series of static drained triaxial compression tests were performed. The impact of substrate material content，effective confining pressures，and hyphae on the mechanical properties of P. ostreatus MBLS was studied. It is found that increasing substrate material content reduces the strength and density of P. ostreatus MBLS. The presence of mycelium changes the structure of P. ostreatus MBLS，improves strength and reduces volumetric contraction，depending on effective confining pressure. The effect of mycelium on the strength and deformation of the specimens is more significant at low confining pressures(about 100 kPa) and at small strain stages. The preparation method of P. ostreatus MBLS is straightforward and poses no environmental pollution risks. It represents a promising alternative to conventional shallow backfill geotechnical materials.

Key words： soil mechanics lightweight soil mycelium triaxial shear test strength structural characteristic

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	Articles by authors
	GOU Leyu1
	2
	LI Sa1
	ZHANG Xianwei2

Cite this article:

GOU Leyu1,2,LI Sa1, et al. Study on static strength of mycelium bio-composites lightweight soil[J]. , 2024, 43(10): 2590-2598.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2024.0105 OR https://rockmech.whrsm.ac.cn/EN/Y2024/V43/I10/2590

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