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Experimental and theoretical high pressure study of calcium hydroxyaluminate phases
(Elsevier, 2017)
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 ...
Aluminum Hydroxide Gel Characterization within a Calcium Aluminate Cement Paste by Combined Pair Distribution Function and Rietveld Analyses
(Elsevier, 2017-06)
There are many commercially important multiphase materials which contain amorphous phases, such as cement
pastes, porcelains, glass-ceramics or pharmaceutical compounds. However, the analysis of amorphous phase(s)
within ...
In situ hydration imaging study of a ye'elimite paste by ptychographic x-ray computed tomography
(2017)
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 ...
Chemistry and Mass Density of Aluminum Hydroxide Gel in Eco-Cements by Ptychographic X-ray Computed Tomography
(ACS, 2017)
Eco-cements are a desirable alternative to ordinary Portland
cements because of their lower CO2 footprints. Some ye’elimite-based ecocements
are attracting a lot of interest. Understanding the reasons for the
mechanical ...
Synchrotron Radiation Pair Distribution Function Analysis of Gels in Cements
(MDPI, 2017)
The analysis of atomic ordering in a nanocrystalline phase with small particle sizes, below 5 nm, is intrinsically complicated because of the lack of long-range order. Furthermore, the presence of additional crystalline ...
Clinkering and hydration of belite-ye'elimite-alite cement
(Elsevier, 2017)
Some belite-ye´elimite-ferrite (BYF) cements present low mechanical strengths mainly due to the slow reactivity of belite. A solution to this problem may be the activation of BYF clinkers by preparing them with a coexistence ...
X-ray diffraction, cements and environment, three worlds in one
(2017-12-13)
This keynote lecture will be focused on the strategies for reducing CO2 emissions in the cement production. Concretely, the production of ecocements with optimised formulations that yield reductions in CO2 emissions of up ...
Pair distribution function studies in cementitious systems
(2017-10-24)
The analysis of amorphous/nanocrystalline phase(s) within cement matrices that contain high amounts of crystalline phase(s) is very challenging. Synchrotron techniques can be very useful to characterize such complex samples.1 ...
Synthesis and scaled-up of non-active and active Belite-Alite-Ye'elimite clinker (BAY)
(2017-05-17)
Ordinary Portland cement (OPC) is an environmentally contentious material, as for every ton of OPC produced, ~0.97 tons of CO2 are released. This opens the need of designing new formulations of cements formed by low calcite ...
Hydration study of alite-ye’elimite-anhydrite phases associated to BAY cement
(2017-10-18)
An alternative to decrease CO2 emissions from OPC production consists on the development of a new kind of eco-cements composed by less calcite demanding phases, such as belite and ye'elimite. That is the case of ...