Funct. Mater. 2024; 31 (1): 34-38.

doi:https://doi.org/10.15407/fm31.01.34

Study on piezoresistive properties of graphene modified soil

Zheng Xiao1,2,3, Li Lianchun1,2,3, Shang Wentao1,2,3, Li Yan1,2,3, Li Yu4, Song Peng4

1College of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China
2Key Laboratory of Building Structural Retrofitting and Underground Space Engineering (Shandong Jianzhu University), Ministry of Education, Jinan 250101, China
3Shandong Jianzhu University Subway Protection Research Institute, Jinan 250101, China
4Shandong Jianhe Civil Engineering Consulting Co., Ltd, Jinan, 250013, People′s Republic of China

Abstract: 

Soil material conductivity serves as a tool for assessing the pressure-sensitive properties of soil structure. Changes in the microstructure and electrical resistance of a composite material consisting of soil with the addition of graphene and water under vertical pressure were studied. The main conclusions are as follows: as the water content of a composite material increases, its resistance gradually decreases; the effect of pressure on the resistance becomes less significant when the water content exceeds 8%. In addition, the resistance value of the composite material gradually decreases with increasing graphene content, resulting in stronger pressure sensitivity. A mechanism has been proposed to improve the sensitivity of clayey soil to pressure by adding graphene.

Keywords: 
clay soil; silt; graphene; pressure sensitivity; electrical resistivity.<cc:Red>

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