摘要
Considering the economic and environmental benefits associated with the recycling of polyester(PET)fibres,it is vital to study the application of fibre-reinforced cement composites.According to the characteristics of the wind-blown sand environment in Inner Mongolia,the erosion resistance of the polyester fibre-reinforced cement composites(PETFRCC)with different PET fibre contents to various erosion angles,velocities and sand particle flows was investigated by the gas-blast method.Based on the actual conditions of sandstorms in Inner Mongolia,the sand erosion parameters required for testing were calculated by the similarity theory.The elastic-plastic model and rigid plastic model of PETFRCC and cement mortar were established,and the energy consumption mechanism of the model under particle impact was analyzed.The experimental results indicate that the microstructure of PETFRCC rafter hydration causes a spring-like buffering effect,and the deformation of PETFRCC under the same impact load is slightly smaller than that of cement mortar,and the damage mechanism of PETFRCC is mainly characterized by fiber deformation and slight brittle spalling of matrix.And under the most unfavorable conditions of the erosion,the erosion rate of 0.5PETFRCC is about 57.69%lower than that of cement mortar,showing better erosion resistance.
作者
HAO Yunhong
LIU Yanchen
LI Yonggui
GAO Feng
郝贠洪;刘艳晨;LI Yonggui;GAO Feng(School of Science,Inner Mongolia University of Technology,Hohhot 010051,China;The Inner Mongolia Key Laboratory of Civil Engineering Structure and Mechanics,Fuzhou 350108,China;The Inner Mongolia Autonomous Region Construction Inspection and Appraisal and Safety Assessment Engineering Technology Research Center,Hohhot 010051,China;Fujian Key Laboratory of Novel Functional Textile Fibers and Materials,Minjiang University,Hohhot 010051,China;School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)
基金
Funded by the National Natural Science Foundation of China(Nos.11162011,51468049 and 11862022)
the Open Project Program of Fujian Key Laboratory of Novel Functional Textile Fibers and Materials
Minjiang University(China)(No.FKLT FM1907)
the Inner Mongolia Colleges and Universities Youth Science and Technology Talents Support Program(No.NJYT-17-A09)。
