The effect of bamboo fiber on the mechanical properties and autogenous shrinkage of ultra-high performance concrete(UHPC)was investigated in this study,and the mechanical properties and mass loss of the specimens subjected to 30 drying and wetting cycles were also tested.The results showed that when bamboo fiber was added alone,the flexural strength of UHPC increased significantly with the in-crease of fiber content,and the increase was as high as 32.7％when the content was 1.5％.Moreover,the flexural strength and toughness of UHPC were significantly enhanced by incorporating bamboo fiber when the content of steel fiber was constant,indicating that bamboo and steel fiber had a good synergy effect.Adding 1.0％bamboo fiber could reduce the autogenous shrinkage of UHPC by 52.7％,and the me-chanical properties of bamboo fiber reinforced UHPC specimens did not decrease after drying and wetting cycles,but their long-term dura-bility still needs to be further verified.
维普
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