| Autor: |
Rui Zhang, Ping Lyu, Yanzhu Feng, Xiao Hu, Xueyu Geng |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
DEStech Transactions on Materials Science and Engineering. |
| ISSN: |
2572-889X |
| DOI: |
10.12783/dtmse/ictim2017/9927 |
| Popis: |
One of the most important factors for the application of coatings on infrastructure is their interfacial performance. The paper presents an experimental study on the influence of adverse environmental circumstances in the interfacial performance of a coated mortar. For the purpose, a damping and protective material was applied a mortar substrate and the saturated Ca(OH)2 solution, the salt-spray and the static bending load were independently and collectively applied on the coated mortar specimens. The adhesion strength and the interfacial micro-deformation of the coating are determined. SEM and FTIR were employed to characterize the interfacial morphology and analyze the cohesive mechanism between the coating and the mortar. Test results lead to the conclusion that the adhesion strength of the coating is not significantly influenced by the corrosive environment. The adhesion strengths of specimens are above 1MPa under 20d of the immersion of saturated Ca(OH)2 solution, the co-action of bending load and saturated Ca(OH)2 solution and the co-action of bending load and salt-spray, respectively. Meanwhile, the interfacial strain of the coating-substrate varies according to different experimental circumstances and it was affected most by the coaction of bending load and saturated Ca(OH)2 solution. Under the coaction of bending load and saturated Ca(OH)2 solution, the ultimate interfacial strain in the center decreases by at least 11 compared to controlled specimens, while the ultimate interfacial strain decreases by at least 7 under the co-action of bending load and salt-spray. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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