Mostrando ítems 61-66 de 66
Influence of the calcium sulfate source on the rheological behaviour of calcium sulfoaluminate cement pastes
Calcium sulfoaluminate (CSA) cements are receiving increasing attention since their manufacture produces much less CO2 than ordinary Portland cement (OPC) . In addition, they show interesting properties such as high ...
Hydration studies of calcium sulfoaluminate cements blended with fly ash
The main objective of this work is to study the hydration and properties of calciumsulfoaluminate cement pastes blended with fly ash (FA) and the corresponding mortars at different hydration ages. Laboratory X-ray ...
Hydration mechanisms of two polymorphs of synthetic ye'elimite
Ye'elimite is the main phase in calcium sulfoaluminate cements and also a key phase in sulfobelite cements. However, its hydrationmechanismis not well understood. Here we reported newdata on the hydration behavior of ...
Reactive belite stabilization mechanisms by boron-bearing dopants
Belite-rich cements hold promise for reduced energy consumption and CO2 emissions, but their use is hindered by the slow hydration rates of ordinary belites. This drawback may be overcome by activation of belite by doping. ...
In situ hydration imaging study of a ye'elimite paste by ptychographic x-ray computed tomography
Eco-cements are a desirable alternative to ordinary Portland cements because of their lower CO2 footprints. For instance, the manufacture of Calcium SulfoAluminate (CSA) cements is more environmentally friendly than that ...
Hydration studies of ye’elimite by using Ptychographic X-ray nano-tomography
CSA (Calcium SulfoAluminate) cements may have variable compositions but all of them contain ye’elimite(Ca4Al6O12SO4). The manufacture of CSA cements is more environmentally friendly than that of ordinary Portland cements ...