Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mitigating early age shrinkage of Ultra-High Performance Concrete by using Super Absorbent Polymers (SAP)
UHPC (Ultra-High Performance Concrete) has a number of superior properties adding up to the considerable potential of this new material in numerous of practical applications. It is, however, subject to very high autogenous shrinkage at an early age and, accordingly, to a pronounced tendency to crack. In the research project reported here, the effectiveness of the internal curing of UHPC to mitigate these autogenous deformations has been investigated. SAP (Super Absorbent Polymers ) were used first to absorb water in the fresh mix and subsequently to release it with decreasing relative humidity in the pore system during hydration The results obtained show that the addition of dry SAP and an amount of extra water during mixing leads to a pronounced reduction in deformation due to autogenous shrinkage. Moreover, the paper reports the effects of the addition of SAP on the rheological behaviour of UHPC in the fresh state, its mechanical properties in the hardened state, total shrinkage deformation, and changes in its microstructure.
Mitigating early age shrinkage of Ultra-High Performance Concrete by using Super Absorbent Polymers (SAP)
UHPC (Ultra-High Performance Concrete) has a number of superior properties adding up to the considerable potential of this new material in numerous of practical applications. It is, however, subject to very high autogenous shrinkage at an early age and, accordingly, to a pronounced tendency to crack. In the research project reported here, the effectiveness of the internal curing of UHPC to mitigate these autogenous deformations has been investigated. SAP (Super Absorbent Polymers ) were used first to absorb water in the fresh mix and subsequently to release it with decreasing relative humidity in the pore system during hydration The results obtained show that the addition of dry SAP and an amount of extra water during mixing leads to a pronounced reduction in deformation due to autogenous shrinkage. Moreover, the paper reports the effects of the addition of SAP on the rheological behaviour of UHPC in the fresh state, its mechanical properties in the hardened state, total shrinkage deformation, and changes in its microstructure.
Mitigating early age shrinkage of Ultra-High Performance Concrete by using Super Absorbent Polymers (SAP)
Verringerung der frühzeitigen Schrumpfung von Ultrahochleistungsbeton durch die Verwendung von superabsorbierenden Polymeren
Mechtcherine, V. (Autor:in) / Dudziak, L. (Autor:in) / Hempel, S. (Autor:in)
2009
7 Seiten, 6 Bilder, 4 Tabellen, 6 Quellen
Aufsatz (Konferenz)
Englisch
| British Library Online Contents | 2016