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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 ...
Phase and microstructure evolutions in LC3 binders by multi-technique approach including synchrotron microtomography
(Elsevier, 2021-06-19)
Limestone Calcined Clay Cements, LC3, are attracting a lot of attention as it is possible to reduce the clinker
factor by 50%, which means a cement CO2 footprint reduction of 40%. This is compatible with maintaining
the ...
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 ...
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 cements and their activation
(Elsevier, 2020-11)
Belite cements, BCs, containing mainly belite, alite and calcium aluminates, are currently used as low heat cements.
These binders produce high amounts of C–S–H gel and have very good durability properties which are
reviewed. ...
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 ...
Local structure and Ca/Si ratio in C-S-H gels from hydration of blends of tricalcium silicate and silica fume
(Elsevier, 2021-03)
At the microscale, C-S-H gels from alite, or neat Portland cements, has a Ca/Si ratio close to 1.80. At the nanoscale, C-S-H is described by a defective tobermorite structure which allows a maximum Ca/Si ratio close to ...
Hydration Activation of Alite-Belite-Ye’elimite Cements by Doping with Boron
(2020)
The hydration behavior of two alite-belite-ye’elimite (ABY)
cements has been studied. The production of these materials releases into
atmosphere ∼17% less CO2 compared to Portland cement. The ABY cement
contains alite, ...