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Self-Sensing Properties of Alkali Activated Blast Furnace Slag (BFS) Composites Reinforced with Carbon Fibers

机译:碳纤维增强的碱活化高炉矿渣(BFS)复合材料的自感性能

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摘要

In recent years, several researchers have shown the good performance of alkali activated slag cement and concretes. Besides their good mechanical properties and durability, this type of cement is a good alternative to Portland cements if sustainability is considered. Moreover, multifunctional cement composites have been developed in the last decades for their functional applications (self-sensing, EMI shielding, self-heating, etc.). In this study, the strain and damage sensing possible application of carbon fiber reinforced alkali activated slag pastes has been evaluated. Cement pastes with 0, 0.29 and 0.58 vol % carbon fiber addition were prepared. Both carbon fiber dosages showed sensing properties. For strain sensing, function gage factors of up to 661 were calculated for compressive cycles. Furthermore, all composites with carbon fibers suffered a sudden increase in their resistivity when internal damages began, prior to any external signal of damage. Hence, this material may be suitable as strain or damage sensor.
机译:近年来,几位研究人员已经证明了碱活化矿渣水泥和混凝土的良好性能。如果考虑到可持续性,这种水泥除了具有良好的机械性能和耐用性外,还可以替代波特兰水泥。此外,在过去的几十年中,多功能水泥复合材料因其功能应用(自感应,EMI屏蔽,自加热等)而得到了发展。在这项研究中,已经评估了应变和损伤感测可能应用的碳纤维增强碱活化渣浆。制备了添加0、0.29和0.58vol%碳纤维的水泥浆。两种碳纤维剂量均显示出感测特性。对于应变感应,对于压缩循环,计算出的功能度量因子最高为661。此外,当任何内部损坏信号出现之前,内部损坏开始时,所有含碳纤维的复合材料的电阻率都会突然增加。因此,这种材料可能适合作为应变或损坏传感器。

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