Application of carbon black in conductive fly ash geopolymer mortars

International Conference Building Materials, Products and Technologies

材料科学;工业技术（总论）

Mizerová, C.^1 ; Kusák, I.^1 ; Rovnanik, P.^1

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

关键词: Carbon black contents;    Compressive and flexural strengths;    Conductive fillers;    Future applications;    Geopolymer;    Geopolymer mortars;    Mercury intrusion porosimetry;    Self-sensing;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/583/1/012014/pdf
DOI  :  10.1088/1757-899X/583/1/012014

来源: IOP

【 摘 要 】

Materials with enhanced electrical properties are widely studied concerning their future application in smart or self-sensing constructions. Carbon black is known as one of the inexpensive multipurpose admixtures used in polymeric materials. This study is focused on the application of carbon black in fly ash geopolymer mortar to enhance its conductivity and other electrical properties. Geopolymer samples were prepared with the carbon black content from 0.5 to 4.0% to evaluate their performance in selected electrical properties (conductivity, resistance, capacitance). Further investigations included its influence on the mechanical properties (compressive and flexural strength) and microstructure of the binder (mercury intrusion porosimetry, SEM). Despite the considerable improvement in conductivity, the amount of conductive filler over 2% was also associated with increased porosity and reduced compressive strengths.