| Autor: |
Daniela Štefková, Kristýna Timcakova, Zdeněk Chobola |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Advanced Materials Research. 1124:301-306 |
| ISSN: |
1662-8985 |
| DOI: |
10.4028/www.scientific.net/amr.1124.301 |
| Popis: |
Non-destructive acoustic analysis method Impact-echo method as a traditional method for civil engineering was used for this experiment. The paper deals with the applicability of Impactecho acoustic method to testing of cement-based composites prepared from a mix of cement mortar and quartz sand, which were intentionally degraded by high-temperature treatment (in the temperatures range from 200°C to 1200°C). The aim of this paper is introduce the effect of high-temperature degradation. An understanding of microstructure performance relationships is the key to true understanding of material behaviors. The results of non-destructive testing confirmed the different structure of mortar specimens. The subjected to high-temperatures led to absorption of lower frequencies as compared to the reference specimens. A significant decrease of the absorbed frequencies was observed, depending on temperature. The largest decrease occurred after the specimens exposure at 400-600 °C. The effect of heat exposure to the decrease of frequencies was mitigated to the temperature degradation 1200 °C. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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