纤维对高性能砼抗裂性能影响的研究

Study on the crack resistance of concrete effected by fiber

伴随着工程建设的需要和科技的发展,现代砼正向高强度、高耐久性、高流动性和高体积稳定性发展.但是,砼的固有弱点即自身脆性大,特别是当强度较高时更容易出现由于其脆性而产生裂缝的情况,这也是引起许多工程问题的主要原因.本文在理论分析的基础上结合室内实验,得出在砼中加入有机纤维,可有效降低砼脆性,约束砼的收缩变形,提高砼的抗裂阻裂性能的结论.

With the demand of the engineering project and the delopment of the technology, concretes have been developed to get the high strength, high durability, and high mobility with physical volume stability. However because of the initial weakness of concrete, especially when strength is high, cracks will easily he developed because of its brittleness, which is the main reason resulting in many project problems. Putting the organism fiber into eoncrete can lower concrete＇ s brittleness, control the shrinkage deformation of concrete, increase concrete＇ s performance of preventing crack, and improve the whole performances of the high performance concrete.