RT Journal Article
T1 Accuracy in Cement Hydration Investigations: Combined X-ray Microtomography and Powder Diffraction Analyses
A1 Salcedo, Inés R.
A1 Cuesta-García, Ana María
A1 Shirani, Shiva
A1 León-Reina, Laura
A1 García-Aranda, Miguel Ángel
K1 Microestructura
K1 Porosidad
AB Cement hydration is a very complex set of processes. The evolution of the crystallinephases during hydration can be accurately followed by X-ray powder diffraction data evaluated bythe Rietveld method. However, accurate measurements of some microstructural features, includingporosity and amorphous content developments, are more challenging. Here, we combine laboratoryX-ray powder diffraction and computed microtomography ( CT) to better understand the resultsof the  CT analyses. Two pastes with different water–cement ratios, 0.45 and 0.65, filled withincapillaries of two sizes,   = 0.5 and 1.0 mm, were analysed at 50 days of hydration. It was shownthat within the spatial resolution of the measured  CTs, ~2  m, the water capillary porosity wassegmented within the hydrated component fraction. The unhydrated part could be accuratelyquantified within 2 vol% error. This work is a first step to accurately determining selected hydrationfeatures like the hydration degree of amorphous phases of supplementary cementitious materialswithin cement blends.
PB MDPI
YR 2021
FD 2021-11-17
LK https://hdl.handle.net/10630/23239
UL https://hdl.handle.net/10630/23239
LA eng
NO Materials 2021, 14, 6953materialsArticle Accuracy in Cement Hydration Investigations: Combined X-ray Microtomography and Powder Diffraction A Salcedo, I.R.; Cuesta, A.; Shirani, S.; León-Reina, L.; Aranda, M.A.G. Accuracy in Cement Hydration Investigations: Combined X-ray Microtomography and Powder Diffraction Analyses. Materials 2021, 14, 6953. https://doi.org/10.3390/ ma14226953
NO This research has been supported by PID2019-104378RJ-I00 and PID2020-114650RB-I00(Spanish Science Ministry) research grants, which are co-funded by ERDF. IRS is thankful for fundingfrom PTA2019-017513–I.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026