Freezing and Thawing Resistance of Hemp Fiber Reinforced Clays
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Date
2023Author
KURT ALBAYRAK, Zeynep Neşe
ÖZDEMİR, Bahattin
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Clays are natural soils. In geotechnical engineering, clayey soils are problematic
because of their volume-change properties when they interact with water.
Additionally, they may lose strength when exposed to freezing and thawing. Various
soil improvement methods are used to modify the clay soil’s properties. One of these
methods is by adding natural fibers. The aim of the study was to investigate the
strength and freezing-thawing properties of a high-plasticity clay (CH) with hemp
fiber. For this purpose, fiber-reinforced clay samples were prepared by adding hemp
fiber at different percentages (0.5%, 1%, and 1.5%) and different lengths (2 mm, and
5 mm) to a CH clay from Erzurum, Turkey, and the consistency, unconfined
compressive strength (UCS), and freezing-thawing properties of the samples were
investigated. According to the consistency limits test results, liquid limit values
increased as the fiber length and the hemp fiber addition ratio increased, and the
plastic limits of the specimens varied depending on the hemp fiber addition. The
unconfined compressive strength of the samples increased with the increase in the
hemp fiber percentage, and improvements occurred in their unconfined compressive
strengths after four freezing-thawing cycles compared to unreinforced clay.
According to the test results, it is thought that hemp fibers could be an alternative for
improving the freezing and thawing resistance of clay soils.
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