Evaluation of the effectiveness of straw fibers on the mechanical properties of concrete containing zeolite and bentonite

Document Type : Research Article

Authors

1 semnan university

2 Associate Professor, Faculty of Civil Engineering, Semnan University, Iran

3 semnan,iran

Abstract

Cement is one of the most widely used materials in the construction industry, which emits large amounts of carbon dioxide into the environment during production. Environmental challenges and the reduction of energy consumption and the use of natural raw materials have led to increased study and research to find a suitable alternative to cement. Zeolite and bentonite have cement properties. These materials are environmentally friendly and can be easily extracted and also have lower production costs than cement. Natural straw fibers are used as the concrete has low tensile strength. In this research, 9 different mixing ratios with the amount of 250 kg / m3 cement were made in which different percentages of bentonite and zeolite replaced part of the original cement and the percentage of fibers varied by 1% and 3%. After fabrication, the compressive strength and tensile strength of the samples compared to the reference sample at 7 and 28 days were compared. Then, two concrete mixtures with 6% zeolite, 1% straw fiber and 6% and 16% bentonites were selected and three-point bending strength test was performed on beams with dimensions of 10 * 10 * 50 cm. The flexural strength of the reference sample containing 350 kg / m3 of cement was 5.37 MPa in this section. It was finally figured out that the optimum composition contains 6% zeolite, 6% bentonite and 1% straw fiber and is able to achieve 98% flexural strength compared to the reference sample.

Keywords

Main Subjects

References

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Amirkabir Journal of Civil Engineering
Volume 54, Issue 3
June 2022
Pages 811-830

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