Study On The Impermeability And Conductivity Of Carbon Fiber Reinforced Concrete

With the development of concrete material science and structural science, concrete material has got broad application in large-scale bridge construction at home and abroad. Simultaneously, there are inherent defects in concrete material, such as lack of cracking resistance, are more and more outstanding. These defects have strongly impacted on the security and durability of the large-scale bridge constructions. Therefore, the quest and study on safety monitoring and self-adapting system of large-scale civil construction facilities are significant science and technology projects related to our nation's sustainable development. CFRC is increasingly valued as it's widely application prospect about nondestructive examination and self-restoration in civil engineering.Add carbon fiber in the concrete, one aspect not only be able to improve the concrete intensity, but also can improve whose impervious function, make that apply to undersea concrete structure especially; The another aspect the carbon fiber can improve the concrete electric conduction function,whose resistant change law is used to detecting the nothing architectural damages. Mainly, this paper mainly study and analyze the impermeability and electric conduction of the carbon fiber concrete (CFRC). According to the comparative analysis with the average concrete, we have studied the carbon fiber concrete superiority in the field of the compression strength and the impervious function, and the impact factors of the carbon impermeability such as the fiber amounts, the fiber length. In the respect of carbon fiber concrete electric conduction nature, we have studied the impact factor on concrete electric conduction function such as the carbon fiber adulterate amounts, carbon fiber length, the water ratio and the external water pressure. These study on carbon fiber in the hereafter intelligence concrete apply to undersea concrete engineering structure monitor have provided the theory basis.Experimental results indicate that it can improve the concrete intensity and impermeability for the concrete with the carbon fiber added, the carbon fiber concrete impermeability depends on the fiber amounts and the fiber length; The concrete electric conduction improve with the enhance of carbon fiber adulterates amounts. When the carbon fiber volume fraction reaches the transfusion crisis value, continue to increase carbon fiber, Obvious rise happened in the concrete electric conduction function no longer; concrete water ratio is increasingly big, whose electric conduction function is increasingly good.