This study focused on the incorporation of pitch-based short carbon fibers in the self-compacting concrete (SCC) to obtain electrically conductive carbon fiber-based SCC (CFBSCC) composite. The dispersion of carbon fiber in the SCC was done utilizing a low-speed mechanical churner along with a surfactant. The ultimate goal was to impart the smart properties of carbon fiber into SCC to form electrically conductive CFBSCC which could sense its own stress, strain, or damage without using external sensors thereby developing a self-sensing concrete. The impact of the volume of carbon fibers on the compressive strength and electrical properties for 10 SCC mixes were investigated. The conductive CFBSCC was further investigated for its smart self-sensing behavior by correlating it with the piezoresistive properties. Test results showed that the incorporation of carbon fibers in SCC can improve its compressive strength properties and electrical conducting properties depending upon the percentage of carbon fibers employed. It was also found that the self-sensing ability can be developed in SCC using carbon fibers.

中文翻译：

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含有短碳纤维的导电自密实混凝土的自损伤检测

本研究的重点是在自密实混凝土 (SCC) 中加入沥青基短碳纤维以获得导电碳纤维基 SCC (CFBSCC) 复合材料。碳纤维在 SCC 中的分散是使用低速机械搅拌器和表面活性剂完成的。最终目标是将碳纤维的智能特性赋予 SCC，以形成导电的 CFBSCC，无需使用外部传感器即可感知自身的应力、应变或损坏，从而开发出自感应混凝土。研究了碳纤维的体积对 10 种 SCC 混合物的压缩强度和电性能的影响。通过将其与压阻特性相关联，进一步研究了导电 CFBSCC 的智能自感行为。测试结果表明，在 SCC 中加入碳纤维可以提高其抗压强度和导电性能，具体取决于所用碳纤维的百分比。还发现使用碳纤维可以在 SCC 中开发自感应能力。