Innovative Recycled Aggregate Concrete Micropiles Reinforced with FRP Reinforcement
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Abstract
This research introduces an innovative design approach for concrete micropiles constructed from recycled concrete aggregate, reinforced with Fiber-reinforced Polymer (FRP) composites. The study begins by examining standard specifications for concrete piles and then develops the mechanical properties of a mix combining recycled concrete scraps with composite materials for pile fabrication. The investigation extends to the mechanical behavior of the piles under loads, with a focus on axial force and shear strength during earthquake exposure. Special attention is given to the shear force at the longitudinal connection point between two piles. Test results demonstrate a satisfactory load-bearing capacity, with an average maximum moment value of 6.50 kN/m, which is competitive with conventional concrete micropiles available in the market. Additionally, the study explores structural crack failure to promote sustainable infrastructure development. The proposed design method proves to be efficient in supporting weight according to design standards, enables rapid installation, ensures durability over its lifespan, and utilizes cost-effective materials available in the local construction industry.
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