The influence of blast-furnace slag hydration products on microcracking of concrete
| Autor: | Martin Boháč, Miroslava Gregerová |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Cement
Materials science Mechanical Engineering Al content Metallurgy 0211 other engineering and technologies Slag Core (manufacturing) 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Reinforced concrete Volume (thermodynamics) Mechanics of Materials Ground granulated blast-furnace slag visual_art 021105 building & construction visual_art.visual_art_medium General Materials Science Composite material 0210 nano-technology Chemical composition |
| Zdroj: | Materials Characterization. 60:729-734 |
| ISSN: | 1044-5803 |
| DOI: | 10.1016/j.matchar.2008.11.011 |
| Popis: | New hydration products of ground granulated blast-furnace slag are formed during the hydration process of Portland slag cement concrete. Spatial distribution of microcracks in concrete is related also to newly formed slag hydrates. The chemical composition of hydration products is variable and unstable. The Si/Ca ratios rise in hydration products near the unhydrated slag core significantly. There is also a certain increase of Mg and Al content in the central parts of hydration rims. The scope of the paper is to find a relation between slag hydration products and the process of microcracking. The amount of microcracks was reduced in concretes with a lower content of vitreous fraction where the slag basicity was high. Neoformation of hydration products is accompanied by volume changes, which can lead to concrete microcracking. |
| Databáze: | OpenAIRE |
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