2026-05-30T08:50:05Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/325152026-05-29T12:27:29Zcom_10630_2254col_10630_37959

00925njm 22002777a 4500 dc Fernández-Sánchez, Jaime author Cuesta-García, Ana María author Shirani, Shiva author Koufany, Imane author Gómez-de-la-Torre, María de los Ángeles author Santacruz-Cruz, María Isabel author Salcedo, Inés R. author León-Reina, Laura author García-Aranda, Miguel Ángel author 2024 Background: The study of the hydration pathways of Portland cement (PC) and cement blends presents significant challenges due to their multiphase nature and varying fineness. Quantifying the dissolution of initial crystalline and amorphous phases, along with the formation of new components, is crucial. Additionally, understanding microstructural changes with time is also essential. Techniques: We are developing a novel approach based on in situ measurements of cement pastes without sample conditioning. The pastes are injected in thick capillaries (2 mm of diameter) and just the ends are sealed. Sequential data acquisition is carried out through Mo-Kα1 laboratory X-ray powder diffraction (LXRPD) and microtomography (μCT) [1-2]. This methodology is based on scanning not only the same capillary but the same volume over time to minimize variability. The use of wide capillaries is pivotal for artefact avoidance, including self-desiccation, and ensuring excellent particle averaging. https://hdl.handle.net/10630/32515 Cemento Tomografía Cristalografía por rayos X Multimodal study of unaltered cement hydrating pastes: combined high-energy laboratory powder diffraction and microtomography.