Identification of concrete deteriorating minerals by polarizing and scanning electron microscopy
| Autor: | Miroslava Gregerová, Dalibor Všianský |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Ettringite
Aggregate (composite) Gypsum Materials science Mechanical Engineering Carbonation 0211 other engineering and technologies 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Durability Strength of materials Mineral formation chemistry.chemical_compound chemistry Mechanics of Materials 021105 building & construction Forensic engineering engineering General Materials Science Thaumasite 0210 nano-technology |
| Zdroj: | Materials Characterization. 60:680-685 |
| ISSN: | 1044-5803 |
| DOI: | 10.1016/j.matchar.2009.01.018 |
| Popis: | The deterioration of concrete represents one of the most serious problems of civil engineering worldwide. Besides other processes, deterioration of concrete consists of sulfate attack and carbonation. Sulfate attack results in the formation of gypsum, ettringite and thaumasite in hardened concrete. Products of sulfate attack may cause a loss of material strength and a risk of collapse of the concrete constructions. The authors focused especially on the microscopical research of sulfate attack. Concrete samples were taken from the Charles Bridge in Prague, Czech Republic. A succession of degrading mineral formation was suggested. Microscope methods represent a new approach to solving the deterioration problems. They enable evaluation of the state of concrete constructions and in cooperation with hydro-geochemistry, mathematics and statistics permit prediction of the durability of a structure. Considering the number of concrete constructions and their age, research of concrete deterioration has an increasing importance. The results obtained can also be useful for future construction, because they identify the risk factors associated with formation of minerals known to degrade structures. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect