Registration of evolution of process-induced strains in cement mixtures by embedded fiber Bragg grating sensors
| Autor: | G. S. Serovaev, G.N. Gusev, N. A. Kosheleva |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Cement
Materials science Humidity 02 engineering and technology Geometric shape engineering.material 021001 nanoscience & nanotechnology Durability 020303 mechanical engineering & transports 0203 mechanical engineering Fiber Bragg grating Coating engineering Composite material 0210 nano-technology Polyimide Earth-Surface Processes Shrinkage |
| Zdroj: | Procedia Structural Integrity. 28:1883-1891 |
| ISSN: | 2452-3216 |
| DOI: | 10.1016/j.prostr.2020.11.011 |
| Popis: | Cement mixtures are a key element in the manufacture of concrete as the strength and durability of concrete structures largely depend on the properties of cement. The use of modern methods for strain measurements allows to obtain important information about the strain behavior within the material under study. The paper discusses the possibility of using fiber-optic sensors based on Bragg gratings embedded in cement mixture samples with different geometric shapes for recording the history and evolution of process-induced strains during the formation of samples. The paper presents a laboratory method for embedding fiber-optic sensors without additional protective coating layers except for the polyimide coating into a cement mixture. Fiber-optic sensors were embedded along the length of the samples, which made it possible to obtain information about the strain distribution. An experimental stand was designed and created to evaluate the shrinkage process and the internal temperature of the test samples made of cement mixture, as well as the temperature and humidity of the environment. The dependence of strain on the sample length is presented. Despite some limitations, the proposed laboratory technique for obtaining data about process-induced strains in cement mixtures can be used to construct and validate models of the mechanical behavior of concrete. |
| Databáze: | OpenAIRE |
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