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

Materials

Josep Lluís Vilaplana¹  Francisco Javier Baeza¹  Oscar Galao¹  Emilio Zornoza¹ 

[1] Civil Engineering Deparment, University of Alicante, Ctra. San Vicente s/n, San Vicente del Raspeig 03690, Spain;

关键词: strain sensing;    damage sensing;    alkaline cement;    carbon fibers;    multifunctional composites;   

DOI  :  10.3390/ma6104776

来源: mdpi

【 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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.