掺石墨烯的高延性水泥基复合材料拉伸敏感性

摘要

研究纳米石墨烯片(GnPs)或氧化石墨烯(GO)掺杂高延性水泥基复合材料(SHCC)的拉伸力学性能、导电性和拉伸机敏性.研究表明,当GnPs掺量低于0.8%时,GnPs-SHCC的拉伸强度高于SHCC,但对延性的影响不大.GnPs的掺入提高了材料的导电性,但在拉伸时电阻变化的灵敏度系数降低.GO在较小的掺量下(0~0.05%),与未掺加GO的SHCC相比GO-SHCC的拉伸强度和延性降低,但其对拉应变的敏感性提高,GO-SHCC的灵敏度系数为SHCC的8~9倍.%The tensile mechanical properties, electrical conductivity and tensile strain self-sensing properties of strain hardening cement-based composites (SHCC) containing graphene nanoplatelets (GnPs) or graphene oxide (GO) were investigated in this paper.Results show that when the content of GnPs was less than 0.8%, tensile strength of GnPs-SHCC was higher than that of conventional SHCC, but GnPs showed little influence on ductility.Electrical conductivity of GnPs-SHCC increased with the increasing contents of GnPs, but the gauge factor decreased.Although GO with small contents of 0-0.05% was used, tensile strength and ductility of GO-SHCC both decreased obviously, while the gauge factor of that increased by 8-9 times.