Experimental Research on Mechanical Behavior of Carbon Fiber Reinforced Concrete under Different Length of Carbon Fiber

Abstract

To further study the mechanical properties of carbon fiber reinforced concrete (CFRC) about carbon fiber length, and determine the optimum length of the fiber. In this paper, based on the test, the enhancement effect of four different length of carbon fiber reinforced concrete is studied. Compressive strength curves and load-deformation curves of the test blocks mixing the different lengths carbon fiber are obtained. In the loading process, the change curve of the ratio of transverse strain and longitudinal strain are obtained. The results showed that the compressive strength increase and after decrease with the increase of fiber length. When the length of carbon fiber is 10 mm, the improved effect is best, and it can effectively improve the brittle failure of concrete. When the length of carbon fiber is more 30 mm, the improved effect of deformation of carbon fiber reinforced concrete is not obvious.