Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression
The development of smart materials is a basic prerequisite for the development of new technologies enabling the continuous non-destructive diagnostic analysis of building structures. Within this framework, the piezoresistive behavior of fly ash geopolymer with added carbon black under compression wa...
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MDPI AG
2021-08-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/16/4350 |
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| author | Cecílie Mizerová Ivo Kusák Libor Topolář Pavel Schmid Pavel Rovnaník |
| author_facet | Cecílie Mizerová Ivo Kusák Libor Topolář Pavel Schmid Pavel Rovnaník |
| author_sort | Cecílie Mizerová |
| collection | DOAJ |
| description | The development of smart materials is a basic prerequisite for the development of new technologies enabling the continuous non-destructive diagnostic analysis of building structures. Within this framework, the piezoresistive behavior of fly ash geopolymer with added carbon black under compression was studied. Prepared cubic specimens were doped with 0.5, 1 and 2% carbon black and embedded with four copper electrodes. In order to obtain a complex characterization during compressive loading, the electrical resistivity, longitudinal strain and acoustic emission were recorded. The samples were tested in two modes: repeated loading under low compressive forces and continuous loading until failure. The results revealed piezoresistivity for all tested mixtures, but the best self-sensing properties were achieved with 0.5% of carbon black admixture. The complex analysis also showed that fly ash geopolymer undergoes permanent deformations and the addition of carbon black changes its character from quasi-brittle to rather ductile. The combination of electrical and acoustic methods enables the monitoring of materials far beyond the working range of a strain gauge. |
| first_indexed | 2024-03-10T08:39:10Z |
| format | Article |
| id | doaj.art-7ea29e1beefd4c4682d6d8c92d793bf2 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T08:39:10Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-7ea29e1beefd4c4682d6d8c92d793bf22023-11-22T08:26:16ZengMDPI AGMaterials1996-19442021-08-011416435010.3390/ma14164350Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under CompressionCecílie Mizerová0Ivo Kusák1Libor Topolář2Pavel Schmid3Pavel Rovnaník4Faculty of Civil Engineering, Brno University of Technology, Veveří 95, 602 00 Brno, Czech RepublicFaculty of Civil Engineering, Brno University of Technology, Veveří 95, 602 00 Brno, Czech RepublicFaculty of Civil Engineering, Brno University of Technology, Veveří 95, 602 00 Brno, Czech RepublicFaculty of Civil Engineering, Brno University of Technology, Veveří 95, 602 00 Brno, Czech RepublicFaculty of Civil Engineering, Brno University of Technology, Veveří 95, 602 00 Brno, Czech RepublicThe development of smart materials is a basic prerequisite for the development of new technologies enabling the continuous non-destructive diagnostic analysis of building structures. Within this framework, the piezoresistive behavior of fly ash geopolymer with added carbon black under compression was studied. Prepared cubic specimens were doped with 0.5, 1 and 2% carbon black and embedded with four copper electrodes. In order to obtain a complex characterization during compressive loading, the electrical resistivity, longitudinal strain and acoustic emission were recorded. The samples were tested in two modes: repeated loading under low compressive forces and continuous loading until failure. The results revealed piezoresistivity for all tested mixtures, but the best self-sensing properties were achieved with 0.5% of carbon black admixture. The complex analysis also showed that fly ash geopolymer undergoes permanent deformations and the addition of carbon black changes its character from quasi-brittle to rather ductile. The combination of electrical and acoustic methods enables the monitoring of materials far beyond the working range of a strain gauge.https://www.mdpi.com/1996-1944/14/16/4350fly ashgeopolymercarbon blackpiezoresistivitycompressive loadingacoustic emission |
| spellingShingle | Cecílie Mizerová Ivo Kusák Libor Topolář Pavel Schmid Pavel Rovnaník Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression Materials fly ash geopolymer carbon black piezoresistivity compressive loading acoustic emission |
| title | Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression |
| title_full | Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression |
| title_fullStr | Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression |
| title_full_unstemmed | Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression |
| title_short | Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression |
| title_sort | self sensing properties of fly ash geopolymer doped with carbon black under compression |
| topic | fly ash geopolymer carbon black piezoresistivity compressive loading acoustic emission |
| url | https://www.mdpi.com/1996-1944/14/16/4350 |
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