关键词: 玄武岩纤维混凝土;早期收缩裂缝;刀口诱导

Abstract: In order to study the early cracking performance of basalt fiber reinforced concrete,basalt fiber concrete with different fiber length and basaltic concrete with different volume content were tested. The results show that the basalt fiber concrete has a significant decrease compared with ordinary concrete,and the early shrinkage crack of basalt fiber concrete decreases first and then increases slowly with the increase of fiber length,the best cracked fiber length is 18 mm. The early shrinkage crack decreases with the increase of fiber volume,and when the volume fraction reaches 0. 2%,the crack disappeares. With the increase of concrete strength,the anti-cracking index of fiber concrete is decreasing and the crack is shorter

Key words: basalt fiber reinforced concrete;early shrinkage crack;knife-edge induction