标题：Experimental study on properties of strength and deflection for steel fiber reinforced self-compacting concrete at early-age
作者：Liu, Gui-Feng ;Chen, Zheng-Fa
作者机构：[Liu, Gui-Feng ;Chen, Zheng-Fa ] Shandong University of Technology, China
会议名称：3rd International Conference on the Concrete Future: Recent Advances in Concrete Technology and Concrete in Structures
会议日期：October 17, 2008 - October 19, 2008
来源：Proceedings of the 3rd International Conference on the Concrete Future - "Recent Advances in Concrete Technology and Concrete in Structures"
摘要：Based on some tests about the relationship between the age and the compressive strength, fracture ability, the properties of steel fiber reinforced self-compacting concrete(SFRSCC) are studied. Test ages are 12hours, 24hours, 3, 7 and 28 days. Based on the force-deflection relationship obtained from the three point bending notched beam tests, the stress-crack opening relationship of the SFRCC (cr-w trilinear diagram) was determined, the influence of distinct stages on the fracture parameters was analyzed by using the FEM methods. The results indicate, steel fiber increased the compressive strength of self-compacting concrete, the strength and Youngs modulus would increase with the SFRSCC age. The post-peak strength value decreased sharply with the age. The trilinear diagram could express exactly the developments of force-displacement.