Mechanical Analysis of Palm-Fiber-Reinforced Sand through Triaxial Tests

Yuxiao Tang, Shaowei Wei, Xueyan Liu (), Wen Liu and Teng Liu
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Yuxiao Tang: Department of Civil Engineering, School of Water and Soil Conservation, Beijing Forestry University, Beijing 100083, China
Shaowei Wei: China Academy of Railway Sciences, Institute of Railway Architecture, Beijing 100081, China
Xueyan Liu: Department of Civil Engineering, School of Water and Soil Conservation, Beijing Forestry University, Beijing 100083, China
Wen Liu: Department of Civil Engineering, School of Water and Soil Conservation, Beijing Forestry University, Beijing 100083, China
Teng Liu: Beijing Municipal Construction Co., Ltd., Beijing 100079, China

Sustainability, 2023, vol. 15, issue 6, 1-16

Abstract: Triaxial tests were employed to investigate palm-fiber-reinforced sand under consolidated drained conditions in this study. Sixteen series of triaxial tests were carried out to investigate the properties of palm-fiber-reinforced sand. One series of pure sand was also employed for comparison. The deviator stress, stress path, shear strength, volume change, void ratio, and enhanced coefficient of fiber-reinforced sand were studied with different fiber lengths varying from 8 mm to 20 mm and fiber contents varying in mass from 0.3% to 0.9%. The test results indicate that palm fibers were beneficial for enhancing the shear strength of the sand. Compared to the peak shear strength increase of about 10% to 20%, the critical shear strength increased much more, by a little over 100%. Therefore, the fibers played a key role in enhancing the critical shear strength of the sand but not the peak shear strength of the sand. The addition of fiber to sand resulted in prolongation of the axial strain required to reach the critical void ratio and improved the sand’s ability to resist larger deformations, enhancing its toughness. Furthermore, the critical shear strength of the sand was positively correlated with both fiber content and fiber length, and the axial strain required to reach the critical shear strength increased with increasing fiber content and length. This study provides valuable experimental data and serves as a reference for temporary reinforcement in geotechnical engineering.

Keywords: palm fiber; fiber-reinforced sand; stress path; volume change; shear strength (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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