Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The hydration of cement in the presence of wood and various additives
The influence of additives on hydration of neat cement (cement-water mixture) and wood-cement-water mixtures was examined by monitoring hydration temperature profiles over a period of 24 hours. Three series of additives were tested. The first series included sea water and other chloride salts like CaCl2, NaCl, MgCl2 and KCl. In the case of neat cement, there was an accelerated hydration due to the presence of the chloride ions. This effect became inconsistent with the inclusion of wood with the cement. In the second series, sodium silicate, aluminium sulphate (alone or in mixture); and sodium sulphate, aluminium silicate (alone or in mixture) were used. These groups of additives did not show any accelerated effect on cement-wood hydration. The third series included CO2 releasing compounds. Aluminium sulphate in combination with sodium hydrogen carbonate increased the hydration temperature and reduced the time to reach the maximum temperature as far as cement cure is concerned.
The hydration of cement in the presence of wood and various additives
The influence of additives on hydration of neat cement (cement-water mixture) and wood-cement-water mixtures was examined by monitoring hydration temperature profiles over a period of 24 hours. Three series of additives were tested. The first series included sea water and other chloride salts like CaCl2, NaCl, MgCl2 and KCl. In the case of neat cement, there was an accelerated hydration due to the presence of the chloride ions. This effect became inconsistent with the inclusion of wood with the cement. In the second series, sodium silicate, aluminium sulphate (alone or in mixture); and sodium sulphate, aluminium silicate (alone or in mixture) were used. These groups of additives did not show any accelerated effect on cement-wood hydration. The third series included CO2 releasing compounds. Aluminium sulphate in combination with sodium hydrogen carbonate increased the hydration temperature and reduced the time to reach the maximum temperature as far as cement cure is concerned.
The hydration of cement in the presence of wood and various additives
Biswas, Daisy (Autor:in) / Ifle, Mark (Autor:in)
2012
9 Seiten, 5 Bilder, 2 Tabellen, 20 Quellen
Aufsatz (Konferenz)
Englisch
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