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Root > Materials Chemistry > Materials Science > Admixtures for Concrete / Mortar > Set-Retarders and -Accelerators

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The influence of calciumsulfoaluminate as accelerating component within cementitious systems
Investigation of the influence of alkali-free, calciumsulfoaluminate-based accelerators on cementitous systems, especially on shotcrete and its strength development. The alkali-free accelerators were compared with potassium aluminate. The influence on hydration, microstructure, strength development and sulfate resistance was studied. Abstract and fulltext for download as PDF (186 pages, 23 MB).
Hrsg.: Christian Paglia, Dissertation, ETH Zürich, 2000

Macrocyclic ligands for specific interaction with ettringite and demostration of a viable mechanism for the setting of cement
Details on the synthesis of macrocyclic organophosphonate retarders. Test results and details on their effect on the crystals of ettringite formed. With SEM pictures. [9 pages, 1.0 MB, PDF]
Hrsg.: Jonathan L. W. Griffin, Peter V. Coveney, Andrew Whiting and Roger Davey aus J. Chem. Soc., Perkin Trans. 2, 1999

Calcium Chloride in Concrete
Describes methods of adding calcium chloride, the effect on physical properties and the mechanical behaviour as well as the chemical effects on Concrete.
Hrsg.: V.S. Ramachandran, National Research Council Canada, 1974

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