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Structural Engineering and Mechanics Volume 90, Number 2, April25 2024 , pages 107-116 DOI: https://doi.org/10.12989/sem.2024.90.2.107 |
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Mechanical properties of coconut fiber-reinforced coral concrete |
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Cunpeng Liu, Fatimah De'nan, Qian Mo, Yi Xiao and Yanwen Wang
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| Abstract | ||
| This study examined the changes in the mechanical properties of coral concrete under different coconut fiber admixtures. To accomplish this goal, the compressive strength, splitting tensile strength, flexural strength and elastic modulus properties of coral concrete blocks reinforced with coconut fibers were measured. The results showed that the addition of coconut fiber had little effect on the cube and axial compressive strengths. With increasing coconut fiber content, the flexural strength and splitting tensile strength of the concrete changed substantially, first by increasing and then by decreasing, with maximum increases of 36.0% and 12.8%, respectively; additionally, the addition of coconut fibers resulted in a failure type with some ductility. When the coconut fiber-reinforced coral concrete was 7 days old, it reached approximately 74% of its maximum strength. The addition of coconut fiber did not affect the early strength of the coral concrete mixed with seawater. When the amount of coconut fiber was no more than 3 kg/m3, the resulting concrete elastic modulus decreased only slightly from that of a similar concrete without coconut fiber, and the maximum decrease was 5.4%. The optimal dose of coconut fiber was 3 kg/m3 in this study. | ||
| Key Words | ||
| coconut fiber; concrete; coral; elastic modulus; mechanical properties | ||
| Address | ||
| Cunpeng Liu: School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Pulau Pinang, Malaysia; Department of Civil and Surveying Engineering, Guilin University of Technology at Nanning, Nanning, Guangxi Zhuang, China Fatimah De'nan: School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Pulau Pinang, Malaysia Qian Mo: Department of Civil and Architectural Engineering, Guangxi Transport Vocational and Technical College, Nanning, Guangxi Zhuang, China Yi Xiao: School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Pulau Pinang, Malaysia Yanwen Wang: Department of Civil and Architectural Engineering, Guangxi Transport Vocational and Technical College, Nanning, Guangxi Zhuang, China | ||