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| 导电功能填料改性超高性能混凝土的压敏与弯敏特性研究 |
| Study on Piezoresistive and Flexural-sensing Properties of UHPC Modified with Conductive Functional Fillers |
| 投稿时间：2025-09-22 |
| DOI：10.16018/j.cnki.cn32-1650/n.202602002 |
| 中文关键词: 超高性能混凝土 导电功能填料 压敏特性 弯敏特性 |
| 英文关键词: ultra-high performance concrete conductive functional fillers piezoresistive properties flexural-sensing properties |
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| 中文摘要: |
| 为制备兼具良好力学与机敏特性的超高性能混凝土(UHPC),通过复掺钢渣砂、碳纳米管(CNTs)、纳米炭黑(NCB)及多层石墨烯纳米片(GNPs)等导电功能填料,系统测试了UHPC的28 d抗压强度、电阻率及其在极限荷载下的压敏及弯敏特性。结果表明,当钢渣砂、CNTs、NCB、GNPs的质量掺量分别为20%、0.2%、0.2%及0.03%时,材料性能最优,此时UHPC的28 d电阻率比对照组下降了45.44%、抗压强度提高了12.80%、抗压与抗折电阻率最大降幅分别达63.14%和27.42%。 |
| 英文摘要: |
| To develop ultra-high performance concrete (UHPC) with excellent mechanical and self-sensing properties, this study incorporated multiple conductive functional fillers, including steel slag sand, carbon nanotubes (CNTs), nano-carbon black (NCB), and multi-layer graphene nanoplatelets (GNPs). The 28 d compressive strength, electrical resistivity and the piezoresistive and flexural-sensing properties of UHPC under ultimate loading were systematically investigated. The results showed that the optimal performance was attained with the incorporation by mass of 20% steel slag sand, 0.2% CNTs, 0.2% NCB and 0.03% GNPs. Compared to the control group, the 28-day electrical resistivity decreased by 45.44%, while the compressive strength increased by 12.80%. The maximum decreases in compressive and flexural resistivity reached 63.14% and 27.42%, respectively. |
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