flexural strength;  volume ratio;  Steel fiber concrete (SFRC).

Through the study of the flexural test of steel fiber concrete (SFRC) on 30 specimens in 90 groups, the influence of two different types and volume rates of steel fibers on the flexural strength of concrete is discussed, and the relationship between SFRC flexural strength, compressive strength and splitting strength is obtained, which provides reference for the application of bridge deck paving engineering of Nanyang Expressway. The results show that with the increase of steel fiber volume ratio, the flexural strength of SFRC also increases linearly, and the ratio of flexural strength to compressive strength also increases. The flexural strength of SFRC increased with the increase of splitting strength, but with the increase of steel fiber volume rate, the ratio of flexural strength to splitting strength of SFRC showed a downward trend.