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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 ...
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 ...
Accuracy in Cement Hydration Investigations: Combined X-ray Microtomography and Powder Diffraction Analyses
(MDPI, 2021-11-17)
Cement hydration is a very complex set of processes. The evolution of the crystalline
phases during hydration can be accurately followed by X-ray powder diffraction data evaluated by
the Rietveld method. However, accurate ...
ANALYSIS OF BUILDING MATERIALS BY SYNCHROTRON X-RAY IMAGING
(-, 2021-01)
Building materials have complex hierarchical microstructures. The largest components are coarse aggregates with dimensions larger than a few centimetres and the smallest ones are the calcium silicate hydrate (C-S-H) gel ...
Synchrotron X-ray pair distribution function analysis of calcium silicate pastes
(2021)
The analysis of nanocrystalline and amorphous phases in cement matrices which
contain high amounts of crystalline phases is a very challenging task. In this respect,
pair distribution function (PDF) methodology in ...
Characterization of C-S-H gels by pair distribution function analysis
(2021)
Portland cement (PC) is the most manufactured world product. However, cement industry is one of the major contributors for greenhouse gas emissions. On average, for every ton of grey PC clinker, around 0.87 CO2 tons are ...