Multifunctionality and Smart Structures Based on Cement Filled with Nano-materials

摘要

In this study,a multifunctional cement-based material filled with nano-particles(CMFN)is proposed.The fabrication procedure of the cement-based material filled with nano-particles is experimentally studied and the proportion of the ingredients of CMFN is obtained.The mechanical properties and the durability of CMFN including compressive strength,flexure strength,ductility,fatigue,abrasion and chloride permeability are experimentally investigated.All the mechanical properties and durability listed above are greatly improved.Furthermore,the self-sensing properties of the cement-based material filled with nanoparticles are systematically studied.A strain gauge fabricated by using this material is developed.The tunnel effect and percolation theory are employed to interpret the self-sensing properties.An electromechanical model with three-dimensional strain is proposed.The influence of moisture,temperature and creep on the self-sensing properties is investigated.The behavior of the reinforced concrete beams and columns embedded with this kind of strain gauge is studied.Finally,this kind of sensors is implemented into a practical bridge.