In order to study the effect of glass fiber on the flexural properties and bending toughness of concrete,taking the content of glass fiber,the length of glass fiber and the strength grade of concrete matrix as the main parameters,the flexural tensile test on glass fiber reinforced concrete trabecular specimens is carried out.The results show that the failure mode is improved when glass fiber is added into concrete;After failure,the overall performance of the specimen is good,and the flexural strength and bending toughness are significantly improved;The flexural strength increases with the increase of glass fiber content in the range of 0.5%to 1.5%,and decreases with the in-crease of glass fiber content in the range of 1.5%to 2.0%;The bending strength and flexural toughness increase with the increase of glass fiber length and matrix strength.Glass fiber can effectively improve the bending properties and flexural toughness of concrete.
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