Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Enhancing early-age resistance to cracking in high-strength cement-based materials by means of internal curing using super absorbent polymers
This paper reports on the effectiveness of internal curing to reduce two major causes of early-age cracking in high-strength cementitious materials, i.e. autogenous and plastic shrinkage. As a measure to develop such curing, the materials, including fine-grained UHPC (Ultra High Perforance Concrete) and cement paste, were enriched using varied amounts of SAP (Super Absorbent Polymers) and extra water whilst mixing. Investigations of shrinkage under free and restrained conditions demonstrated that internal curing can diminish the likelihood of early-age cracking significantly. The amount of SAP and extra water added was found to be decisive both in determining the magnitude of such changes and the history of evolution of autogenous shrinkage. Some deterioration of the early-age mechanical properties in internally cured materials resulted from the retarding of their setting behaviour and from particular changes in their porosity.
Enhancing early-age resistance to cracking in high-strength cement-based materials by means of internal curing using super absorbent polymers
This paper reports on the effectiveness of internal curing to reduce two major causes of early-age cracking in high-strength cementitious materials, i.e. autogenous and plastic shrinkage. As a measure to develop such curing, the materials, including fine-grained UHPC (Ultra High Perforance Concrete) and cement paste, were enriched using varied amounts of SAP (Super Absorbent Polymers) and extra water whilst mixing. Investigations of shrinkage under free and restrained conditions demonstrated that internal curing can diminish the likelihood of early-age cracking significantly. The amount of SAP and extra water added was found to be decisive both in determining the magnitude of such changes and the history of evolution of autogenous shrinkage. Some deterioration of the early-age mechanical properties in internally cured materials resulted from the retarding of their setting behaviour and from particular changes in their porosity.
Enhancing early-age resistance to cracking in high-strength cement-based materials by means of internal curing using super absorbent polymers
Verbesserung der Frühbeständigkeit gegen Rissbildung in hochfesten zementbasierenden Werkstoffen durch innere Nachbehandlung unter Verwendung von superabsorbierenden Polymeren
Dudziak, L. (Autor:in) / Mechtcherine, V. (Autor:in)
2010
11 Seiten, 7 Bilder, 2 Tabellen, 8 Quellen
Aufsatz (Konferenz)
Englisch
Risswiderstand , Superabsorber , Polymer , Nachbehandlung , Ultrahochleistungsbeton , hochfester Werkstoff , Zementpaste , Schrumpfprüfung , Schrumpfung , Trockenschwindung , Druckfestigkeit , Frühfehlererkennung , Mikrogefüge , Rissausbildung , Rissempfindlichkeit , Additiv , Wasser-Zement-Wert , Superplastifizierer
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