Journal
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
Volume 15, Issue -, Pages 1613-1621Publisher
ELSEVIER
DOI: 10.1016/j.jmrt.2021.08.128
Keywords
Tensile strength; Fiber-reinforced soil; GP model; Fiber dispersion; Fiber content; Aspect ratio
Funding
- Outstanding Innovation Scholarship for Doctoral Candidate of Double First Class Construction Disciplines of CUMT
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This study investigated the tensile strength characteristics of polypropylene fiber reinforced soil under different fiber dispersion, content and aspect ratio conditions. Results showed that fiber content and aspect ratio have significant effects on tensile strength, with aspect ratio having the greatest influence on the forecasting model.
The present study was conducted to investigate the tensile strength characteristics of polypropylene (PP) fiber reinforced soil with different fiber dispersion, content and aspect ratio. In order to investigate this, the experimental programme was comprised by the test with a wide range of fiber content (0.35%, 0.60%, 0.85%), fiber aspect ratio (150, 225, 350), and mix patterns (discrete or random distribution). The results indicated that increases in fiber content caused an increment in the tensile strength whether discrete or random distribution. The increasing extent of tensile strength was different with increase of fiber aspect ratio under different fiber mix patterns. From experimental data, a genetic programming (GP) model was proposed for analyzing tensile strength contrast of the two mix patterns. In addition, the sensitive analysis of three inputs showed that aspect ratio has the greatest influence on the forecasting model. The effectiveness of the GP model was validated by the test results, and the robust model developed would provide a theoretical support for roadbase designing and construction which were reinforced with PP fibers. (c) 2021 Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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