三相导电混凝土掺料配比研究及评价  

Research and evaluation on the proportioning ofthree phase conductive concrete

作　　者：陈宁萱 胡少伟 田锌如 CHEN Ningxuan;HU Shaowei;TIAN Xinru(School of Civil Engineering,Chongqing University,Chongqing 400000,China;Yellow River Laboratory,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]重庆大学土木工程学院,重庆400000 [2]郑州大学黄河实验室,郑州450001

出　　处：《功能材料》2024年第3期3198-3205,共8页Journal of Functional Materials

基　　金：国家自然科学基金重点项目(52130901);国家重点研发计划项目(2022YFC3004400);重庆市创新研究群体科学基金项目(cstc2020jcyj-cxttX0003)。

摘　　要：以钢纤维(Steel Fibre, SF)、碳纤维(Carbon Fibre, CF)、纳米炭黑(Nano-Carbon Black, NCB)为导电掺料,基于正交试验方法设计试验,测量每组配比下试件的电阻率与抗压强度,并采用层次分析法和灰色关联度法进行评价。结果表明,三相导电混凝土试件电阻率随SF、CF和NCB掺量的增加而降低;抗压强度随SF、CF掺量的增加而增加,而NCB反之;其中CF对电阻率和抗压强度的影响均最为显著。当SF、CF和NCB掺量分别为0.6%、0.3%(体积分数)和0.6%(质量分数)时导电混凝土达到渗流阈值;而综合评价后可知,当SF、CF和NCB掺量分别为0.9%、0.7%(体积分数)和0.6%(质量分数)时导电混凝土性能最好,其抗压强度提升31.8%,电阻率降低98.9%。Based on the orthogonal experiments,using carbon fiber,steel fiber,and nano carbon black as admixtures,the resistivity and compressive strength of specimens at each mix ratio were measured,and the results were evaluated using the analytic hierarchy process and grey correlation method.The research results indicated that the resistivity increases with the increase of CF,SF,and NCB content.The compressive strength increases with the increase of CF and SF content,and decreases with the increase of NCB content.CF has the most significant impact on electrical resistivity and compressive strength.The percolation thresholds of conductive concrete in the experiment are at CF,SF,and NCB dosages of 0.6 v%,0.3 v%and 0.6 w%,respectively.The comprehensive evaluation results showed that the conductive concrete has the best performance when the CF,SF,and NCB dosages are 0.9 v%,0.7 v%,and 0.6 w%,respectively,with a compressive strength increase of 31.8%and a resistivity decrease of 98.9%compared to the blank group.

关 键 词：碳纤维 钢纤维 纳米炭黑 电阻率 抗压强度 灰色关联度 

分 类 号：TU528.572[建筑科学—建筑技术科学]