Investigation of the Effect of Natural Rice Straw Fibers on the Mechanical Behavior of Clayey Soils Stabilized with Cement

Document Type : Research Article

Authors

1 Faculty of Civil Engineering, Shahrood University of Technology, Shahrud, Iran

2 M.Sc. Faculty of Civil Engineering, Shahrood University of Technology

Abstract

Increased production of lignocellulosic waste and its incineration by farmers have raised bio-environmental concerns. Reusing these fibers to change the mechanical properties of loose soil can reduce these problems. It should be noted that the use of natural fibers has received more attention due to their compatibility with the environment and the realization of sustainable geotechnical goals. The reinforcement effect of rice straw fibers on the mechanical behavior of clayey soils stabilized with cement has been investigated. Studying the effect of different percentages of mixing these fibers on the compressive strength of clayey soils stabilized with different amounts of cement through performing unconfined compressive strength test and evaluation of the effect of the so-called fibers on the results of standard compaction test form the basis of laboratory research in this project. Cement can be used as an additive along with fiber reinforcement to create the required cohesion to increase the compressive strength of the sample. The results of unconfined compressive strength on the uncured samples stabilized with different amounts of cement (4%, 8% and, 12%), and reinforced with different amounts of rice straw fibers (0.25% and, 1%) show that at a constant content of cement, increasing the fiber percentage can increase the compressive strength up to 148% and also, at a constant content of fibers, increasing the cement percentage can increase the compressive strength up to 183%.

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References

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Amirkabir Journal of Civil Engineering
Volume 54, Issue 8
November 2022
Pages 3067-3082

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