Mechanical and Electrical Properties of Recycling Carbon Fiber Cement-based Materials with Different Forms
WANG Yan1,2,*, GAO Tengxiang1, ZHANG Shaohui3, LI Wenjun1, NIU Ditao3
1 School of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China 2 State Key Laboratory of Green Building in Western China, Xi'an 710055, China 3 School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
Abstract: The prepreg, fabric and composite waste generated during the life cycle of carbon fiber, were clipping and shredding into chopped recycling carbon fiber (CRCF), recycling carbon fiber sphere (RCFS) and recycling carbon fiber powder (RCFP), studying on mechanical and electrical properties of recycling carbon fiber reinforced cement-based materials with different forms. The crack arresting effect of CRCF and the pore filling effect of RCFP would all enhance the strength of the cement-based materials. While the agglomeration of RCFS resulted in an insignificant lifting effect. CRCF formed a conductive path inside the cement-based material. The resistivity decreased with the increase of CRCF content by more than 90%, and the content of percolation threshold decreased significantly with the increase of CRCF length. RCFS was dispersed in an isolated spherical form in the matrix, and the residual resin on the surface of RCFP hinders the formation of conductive paths, and the resistivity reduction of the two forms of recycled recycling carbon fiber reinforced cement-based composite materials was less than 10.7%. The conductive model is established by dividing its resistance into fiber contact resistance, fiber pathway resistance and tunnel transmission resistance. The model error is 9.24%—40.1%.
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2024, Vol. 38 
