Steel microfibres in fly ash geopolymer for multifunctional conductive composites

FIBRE CONCRETE 2019

土木建筑工程

Mizerová, C.^1 ; Kusák, I.^1 ; Rovnaník, P.^1 ; Bayer, P.^1

Brno University of Technology, Faculty of Civil Engineering, Brno, Czech Republic^1

关键词: Compressive and flexural strengths;    Conductive composites;    Electrical conductivity;    Interfacial bonding;    Mechanical and fracture properties;    Mechanical performance;    Multifunctional properties;    Relative permittivity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/596/1/012014/pdf
DOI  :  10.1088/1757-899X/596/1/012014

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Steel fibres in construction materials not only enhance their mechanical and fracture properties but also increase their capability of electrical conductivity. This feature thus enables the material to obtain advanced multifunctional properties that can be utilized in self-sensing and other smart applications. Fly ash geopolymers with steel microfibres in 5-30% wt. were prepared to assess the influence of the fibres on selected electrical properties of the composite (resistance, capacitance and relative permittivity) with respect to mechanical performance. Microstructure and interfacial bonding of matrix and steel fibres was observed by electron microscopy imaging. Steel fibres caused an improvement in all assessed electrical properties but only above a certain frequency values. Furthermore, steel reinforced samples exhibited increase in both compressive and flexural strength.