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Phase-selective degree of hydration at setting: An in situ synchrotron diffraction study
(Elsevier, 2022-03)
Setting of Portland cements is still not well understood. Previous studies used techniques that analyse the pastes as a whole to correlate setting times with degree of hydration. Here, in-situ synchrotron X-ray diffraction ...
Hydration characteristics and mechanical performances of LC3 binders with spanish kaolinitic calcined clays
(2022)
Limestone Calcined Clay Cements (LC3) are binders with complex phase development and
microstructures. Although the hydration chemistry of these cements are being widely researched [1],
due to the clay mineralogy variability, ...
Effect of boron and water-to-cement ratio on the performances of laboratory prepared Belite-Ye'elimite-Ferrite (BYF) cements
(2021)
The effect of superplasticiser, borax and the water-to-cement ratio on BYF hydration and
mechanical strengths has been studied. Two laboratory-scale BYF cements—st-BYF (with -C2S
and orthorhombic C4A3 S) and borax-activated ...
Influence of curing temperature on belite cement hydration: a comparative study with Portland cement
(Elsevier, 2021-05-24)
Belite cements (BCs) could be a more sustainable binder than Portland cements (PCs) but adequate knowledge of the hydration features has still to be built. In particular, the mild curing hydration temperature effects have ...
X-ray Total Scattering Study of Phases Formed from Cement Phases Carbonation
(MDPI, 2021)
Carbonation in cement binders has to be thoroughly understood because it affects phase
assemblage, binder microstructure and durability performance of concretes. This is still not the case as
the reaction products can ...
Early-age reactivity of calcined kaolinitic clays in LC3 cements: a multitechnique investigation including pair distribution function analysis
(Taylor & Francis, 2022-09)
Limestone Calcined Clay Cements, LC3, allows CO2 emissions savings up to 40%. The resulting binders have competitive mechanical performances after a week. However, the reactivity of LC3 at early ages is slow and should be ...
Portland and belite cement hydration acceleration by C-S-H seeds with variable w/c ratios
(Materials, 2022)
The acceleration of very early age cement hydration by C-S-H seeding is getting attention from scholars and field applications because the enhanced early age features do not compromise later age performances. This acceleration ...
Quantitative analysis of cementitious materials by X-ray ptychographic nanotomography
(2021)
Cement manufacturing is responsible for ~7% of the anthropogenic CO2 emissions and hence, decreasing the CO2 footprint, in a sustainable, safe, and cost-effective way, is a top priority. It is also key to develop more ...
Belite hydration at high temperature and pressure by in situ synchrotron powder diffraction
(2020-10-16)
Portland cements are currently used as Oil‐Well‐Cements for the sheath between the metal casing
and the borehole. At high pressures and temperatures, the resulting C-S-H gel(s) is partly unstable
and it can react to give ...
Calcium aluminate cement conversion analysed by ptychographic nanotomography
(Elsevier, 2020-08-17)
Calcium aluminate cements are used for special applications but are nowadays banned for general
structural purposes due to the calcium aluminate hydrate conversion, that has led, for concretes
fabricated with high water ...