Reactivity of fly ash in cement paste studied by means of thermogravimetry and isothermal calorimetry
| Autor: | S. Hoste, Gert Baert, G. De Schutter, N. De Belie |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Cement
Calcium hydroxide Materials science fungi technology industry and agriculture Calorimetry Condensed Matter Physics Thermogravimetry chemistry.chemical_compound chemistry Fly ash Pozzolanic reaction Bound water Physical and Theoretical Chemistry Composite material Thermal analysis Nuclear chemistry |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 94:485-492 |
| ISSN: | 1572-8943 1388-6150 |
| DOI: | 10.1007/s10973-007-8787-z |
| Popis: | Four paste mixtures with varying replacement level of the cement content by fly ash have been studied. Due to fly ash, the acceleration period decreased and a third hydration peak was noticed with isothermal calorimetry. The total heat after 7 days increased with increasing fly ash content. From 1 to 7 days, thermogravimetry showed a higher chemically bound water and Ca(OH)2-content for the pastes with fly ash. Between 7 and 14 days the calcium hydroxide started to be depleted due to the pozzolanic reaction. A unique relation was found between calcium hydroxide and total heat development. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|