Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Alkali-activated slag concrete: Fresh and hardened behaviour
Versión aceptada de: https://doi.org/10.1016/j.cemconcomp.2017.10.003 ; [Abstract:] The behaviour of fresh and hardened alkali-activated slag (AAS) and OPC concretes was compared and the effect of mixing time assessed. OPC and AAS concrete slump and rheological results proved to differ, particularly when the slag was activated with waterglass (WG). The nature of the alkaline activator was the key determinant in AAS concrete rheology. Bingham models afforded a good fit to all the OPC and AAS concretes. In OPC and NaOH-activated AAS concretes, longer mixing had an adverse effect on rheology while improving hardened performance only slightly. In WG-AAS concrete, longer mixing times, improved mechanical properties and also rheological behaviour was enhanced, in which those conditions were required to break down the microstructure. Longer mixing raised thixotropy in OPC and NaOH-activated AAS concretes, but lowered the value of this parameter in waterglass-activated slag concrete. ; This study was funded by the Spanish Ministry of the Economy under Projects BIA2013-47876-C2-1-P and BIA2014-58063-R.
Alkali-activated slag concrete: Fresh and hardened behaviour
Versión aceptada de: https://doi.org/10.1016/j.cemconcomp.2017.10.003 ; [Abstract:] The behaviour of fresh and hardened alkali-activated slag (AAS) and OPC concretes was compared and the effect of mixing time assessed. OPC and AAS concrete slump and rheological results proved to differ, particularly when the slag was activated with waterglass (WG). The nature of the alkaline activator was the key determinant in AAS concrete rheology. Bingham models afforded a good fit to all the OPC and AAS concretes. In OPC and NaOH-activated AAS concretes, longer mixing had an adverse effect on rheology while improving hardened performance only slightly. In WG-AAS concrete, longer mixing times, improved mechanical properties and also rheological behaviour was enhanced, in which those conditions were required to break down the microstructure. Longer mixing raised thixotropy in OPC and NaOH-activated AAS concretes, but lowered the value of this parameter in waterglass-activated slag concrete. ; This study was funded by the Spanish Ministry of the Economy under Projects BIA2013-47876-C2-1-P and BIA2014-58063-R.
Alkali-activated slag concrete: Fresh and hardened behaviour
Puertas, Francisca (Autor:in) / González-Fonteboa, Belén (Autor:in) / González-Taboada, Iris (Autor:in) / Alonso López, María del Mar (Autor:in) / Torres Carrasco, Manuel (Autor:in) / Rojo-López, Gemma (Autor:in) / Martínez-Abella, Fernando (Autor:in)
01.01.2018
doi:10.1016/j.cemconcomp.2017.10.003
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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