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Compressive properties of coconut fiber reinforced concrete confined by basalt fiber reinforced polymer pipe

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Document pages: 10 pages

Abstract: Basalt fiber is cheap and has excellent mechanical properties. In addition, combined with environmentally friendly coconut fiber, it can contribute to sustainable building materials. In this study, a composite composed of basalt fiber reinforced polymer (BFRP) pipe wrapped coconut fiber reinforced concrete (CFRC) was developed. The 28 day compressive strength of plain concrete is about 15   MPa, which represents the concrete with low strength and poor quality common in a large number of old buildings. The concrete is poured and cured to the steel formwork with an inner diameter of 100, the BFRP pipe with a height of 200 mm, and the BFRP pipe with an inner diameter of 160 mm with a height of 320 mm, respectively. A total of 36 cylindrical specimens were madeand tested. The axial compression tests were carried out to examine the strength and ductility enhancement due to the confinement of the BFRP tubes and coconut fibers. Also, the existing models were used to predict the ultimate axial compression strength and strain. The results show that the size of the specimen significantly influences the predicted compression strength.

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