Mostrando ítems 31-40 de 83
Synchrotron X-ray pair distribution function analysis of tricalcium silicate pastes
The analysis of nanocrystalline and amorphous components within cement pastes that contain high amounts of crystalline phases is very challenging. Synchrotron powder diffraction jointly with the pair distribution function ...
Water-to-cement ratio influence on low-carbon cements performances
Portland Cement (PC) is the most important active ingredient in most of the construction concrete. However, the PC production is associated with a high carbon dioxide release (around 1 ton of CO2 per ton of PC). One approach ...
Synchrotron Pair Distribution Function analyses of Ye’elimite-based pastes
The study of nanocrystalline phase atomic ordering is intrinsically complicated. The presence of additional crystalline phase(s) exacerbates this challenge. Here, we use the synchrotron pair distribution function (PDF) to ...
Diffraction for industries, businesses and health
Se adjunta abstract en PDF- PDF abstract is attached
Effect of different retarders on the hydration of calcium sulfoaluminate eco-cement pastes
The manufacture of Calcium SulfoAluminate (CSA) cements is more environmentally friendly than that of OPC  as their production releases up to 40% less CO2 than the latter. The main performances of CSA cements are fast ...
Experimental and theoretical high pressure study of calcium hydroxyaluminate phases
Five calcium hydroxyaluminate phases have been investigated by synchrotron powder diffraction at high-pressure: two hydrogarnets, kuzelite, stratlingite and ettringite. The obtained bulk modulus, K0, for kuzelite, stratlingite ...
Processing and characterisation of calcium sulphoaluminate ecocements containing Microencapsulated Phase Change Materials
Calcium SulphoAluminate (CSA) cements can be considered as ecocements, since their production releases up to 40% less CO2 than Ordinary Portland Cement (OPC) . In addition, Microencapsulated Phase Change Materials (MPCM) ...
Effect of calcium sulfate source on the hydration of calcium sulfoaluminate eco-cement
The availability of cements, including eco-cements, with tailored mechanical properties is very important for special applications in the building industry. Here we report a full study of the hydration of calcium sulfoaluminate ...
Hydration of Belite-Ye’elimite-Ferrite(BYF) cements with different calcium sulfate sources
(ICE publishing, 2016-07)
Belite-Ye’elimite-Ferrite cements, BYF, are a sustainable alternative to OPC to reduce CO2 emissions. The aim of this research is to understand the influence of the sulfate source on the hydration of two laboratory-prepared ...
Hydration of C4AF in the presence of other phases: A synchrotron X-ray powder diffraction study
Hydration behaviour of C4AF in selected experimental conditions has been determined. C4AF has been hydrated in the absence and presence of gypsum, two polymorphs of ye’elimite and different water/solid ratios. C4AF in ...