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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 ...
Accuracy in Rietveld quantitative phase analysis: a comparative study of strictly monochromatic Mo and Cu radiations
(Willey online Library, 2016)
This study reports 78 Rietveld quantitative phase analyses using Cu K 1,
Mo K 1 and synchrotron radiations. Synchrotron powder diffraction has been
used to validate the most challenging analyses. From the results for ...
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 ...
Structure of stratlingite and effect of hydration methodology on microstructure
(ICE publishing, 2015)
Stratlingite, Ca4Al2(OH)12[AlSi(OH)8]2•2H2O, is an AFm phase which appears as hydration product of aluminum-rich cements. These binders may be calcium aluminate cements, calcium sulfoaluminate cements and also Belite Calcium ...
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 ...
Tailored setting times with high compressive strengths in bassanite calcium sulfoaluminate eco-cements
(Elsevier, 2016-09)
This work deals with the hydration of a calcium sulfoaluminate (CSA) eco-cement prepared with bassanite and different additives (type and content) at a fixed water/CSA ratio of 0.5. Pastes prepared with bassanite show high ...
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 ...
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 ...
Mix and measure - Combining in situ X-ray powder diffraction and microtomography for accurate hydrating cement studies.
(Elsevier, 2023-11-14)
It is reported an innovative methodology based on in situ MoKα1 laboratory X-ray powder diffraction (LXRPD)
and microtomography (μCT) avoiding any sample conditioning. The pastes are injected in 2.0 mm capillaries and
the ...