| Autor: |
Iliopoulos, Sokratis, Dzaye, Evin Dildar A, El Khattabi, Yassir, De Schutter, Geert, Angelis, Dimitrios |
| Přispěvatelé: |
Shiotani, Tomoki, Wakayama, S, Enoki, M., Yuyama, S., Mechanics of Materials and Constructions, Faculty of Engineering |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Popis: |
The construction of cost-effective, high-strength and durable concrete structures is strongly based on the mix design and the early age assessment of its quality. Corrosion attack, spalling, shrinkage cracking or cracking due to freezing-thawing are only a few examples frequently seen in concrete elements as a result of their poor properties. The estimation of the mechanical and physical properties of the latter is, so far, either based on empirical methods, like the slump and V-funnel test, or on destructive tests, like the core sampling and the application of the Schmidt hammer, which are also applied late on the structure. Therefore, it is made clear that the only way to accomplish trust-worthy quality control as early as the moment of mixing is through non-destructive testing techniques. Among them, Acoustic Emission (AE) is the most promising since it allows for the continuous monitoring of the material’s behavior and the detailed evaluation of the emitted signals obtained from different experimental mixdesigns. In the current study, the aforementioned technique is used for the examination of the early age activity of specimens with various water to cement (w/c) and aggregate to cement (a/c) ratios. It is found that using a setup which consists of metal molds and resonant sensors provides distinctive results among the specimens. Finally, throughout this work, it is suggested that AE parameters like the Average Frequency (AF) and the RA value can efficiently be used for quality characterization. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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