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A platform for research: civil engineering, architecture and urbanism
Influences of different sulfonic acids and salts on the hydration behavior of cement pastes
Alkenesulfonic acids and sodium salts as well as arenesulfonic acids can be used as cement admixtures. According to the modification of the molecular structure of the sulfonic acids and salts, the hydration processes of a cement paste can be retarded or accelerated. Due to the increase of the chain length CnH2n+1 until n=9 of aliphatic sulfonic acid salts CnH2n+1SO- 3Na the coarse of hydration of an OPC can be retarded at constant additive concentration. Furthermore the use of different benzene sulfonic acids with different numbers of CH3-substitutents in combination with high and low additive concentration makes it possible to apply the organic substances as accelerators or retarders. Detailed studies show that the influence of the used additives are responsible for the retarded hydration process of C3S and C2S. More over sulfonic acid ions will be fixed in the inter layer of in-situ formed AFm-phases.
Influences of different sulfonic acids and salts on the hydration behavior of cement pastes
Alkenesulfonic acids and sodium salts as well as arenesulfonic acids can be used as cement admixtures. According to the modification of the molecular structure of the sulfonic acids and salts, the hydration processes of a cement paste can be retarded or accelerated. Due to the increase of the chain length CnH2n+1 until n=9 of aliphatic sulfonic acid salts CnH2n+1SO- 3Na the coarse of hydration of an OPC can be retarded at constant additive concentration. Furthermore the use of different benzene sulfonic acids with different numbers of CH3-substitutents in combination with high and low additive concentration makes it possible to apply the organic substances as accelerators or retarders. Detailed studies show that the influence of the used additives are responsible for the retarded hydration process of C3S and C2S. More over sulfonic acid ions will be fixed in the inter layer of in-situ formed AFm-phases.
Influences of different sulfonic acids and salts on the hydration behavior of cement pastes
Der Einfluss verschiedener Sulfonsäuren und Salze auf das Hydratationsverhalten von Zementpasten
Stöber, stefan (author) / Pöllmann, Herbert (author)
2013
6 Seiten, 5 Bilder, 1 Tabelle, 6 Quellen
Conference paper
English
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