EXPERIMENT STUDY ON THE FLEXURAL BEHAVIOUR OF BFRP REINFORCED RECYCLED AGGREGATE CONCRETE BEAMS

Abstract

Abstract: This paper experimentally investigated the flexural behaviour of basalt fiber-reinforced polymer (BFRP) reinforced recycled aggregate concrete (RAC) beams. A total of eight RAC beams, including seven reinforced with BFRP and one reinforced with steel, were fabricated and tested. The paper studied the effect of the different longitudinal reinforcement ratios and replacing rate of recycled aggregate concrete on the flexural behaviour of BFRP reinforced recycled aggregate concrete beams. The flexural capacity, failure mode, flexibility deformation and crack distribution of the test beams were analyzed. The results indicate that the failure mode was under-reinforced failure or over-reinforced failure which was governed by BFRP rupture or concrete crushing, respectively. The BFRP reinforced RAC beams with reasonable reinforcement ratio would produce larger deflection deformation and strain of BFRP tendons than that of steel reinforced RAC beam before the failure. The results indcate that the BFRP reinforced RAC beam could play a good performance of the two materials with a certain degree of ductility. Compared with the replacement rate of recycled aggregates, the reinforcement ratio had a larger influnce on the width and number of cracks in BFRP reinforced RAC beams. Furthermore, it has found that the initial cracking load of BFRP reinforced RAC beams was slightly lower than steel reinforced RAC beam. Whereas, the ultimate load was improved obviously.

Key words: BFRP bar, recycled concrete beams, flexural capacity, reinforcement ratio, recycled aggregate replacement ratio

CLC Number:

TB332

HAN Fei, KONG Xiang-qing, BAO Cheng-cheng, LIU Hua-xin. EXPERIMENT STUDY ON THE FLEXURAL BEHAVIOUR OF BFRP REINFORCED RECYCLED AGGREGATE CONCRETE BEAMS[J]. Fiber Reinforced Plastics/Composites, 2017, 0(12): 45-50.

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