Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mechanochemical syngenite as hydration accelerator for anhydrite-based self-levelling floor screeds
Graphical abstract Display Omitted
Highlights Mechanochemical (MC) syngenite studied as accelerator in anhydrite floor screed. MC syngenite increased early and final compressive strength more than K₂SO₄. However workability (fluidity) and open time of screed were decreased. Combination with sodium polyphosphate retarder eliminates the problem. Syngenite and sodium polyphosphate is excellent accelerator system for anhydrite.
Abstract The performance of mechanochemical syngenite applied as hydration accelerator for fully formulated anhydrite-based self-levelling floor screeds was evaluated regarding workability (open time), setting time, compressive strength, shrinkage and microstructural development. Results demonstrate that mechanochemical syngenite substantially increases early and final strength development, but generally reduces workability (fluidity) and shortens the open time. However, addition of a very minor amount of sodium polyphosphate retarder eliminates these disadvantages without hampering the accelerating effect of syngenite. Hence, when combined with NaPP syngenite was found to present a highly effective hydration accelerator for anhydritebased building materials.
Mechanochemical syngenite as hydration accelerator for anhydrite-based self-levelling floor screeds
Graphical abstract Display Omitted
Highlights Mechanochemical (MC) syngenite studied as accelerator in anhydrite floor screed. MC syngenite increased early and final compressive strength more than K₂SO₄. However workability (fluidity) and open time of screed were decreased. Combination with sodium polyphosphate retarder eliminates the problem. Syngenite and sodium polyphosphate is excellent accelerator system for anhydrite.
Abstract The performance of mechanochemical syngenite applied as hydration accelerator for fully formulated anhydrite-based self-levelling floor screeds was evaluated regarding workability (open time), setting time, compressive strength, shrinkage and microstructural development. Results demonstrate that mechanochemical syngenite substantially increases early and final strength development, but generally reduces workability (fluidity) and shortens the open time. However, addition of a very minor amount of sodium polyphosphate retarder eliminates these disadvantages without hampering the accelerating effect of syngenite. Hence, when combined with NaPP syngenite was found to present a highly effective hydration accelerator for anhydritebased building materials.
Mechanochemical syngenite as hydration accelerator for anhydrite-based self-levelling floor screeds
Schiefer, Christopher (Autor:in) / Plank, Johann (Autor:in)
16.09.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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