2026-05-28T17:46:50Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/185402026-02-03T12:21:49Zcom_10630_2254col_10630_37959

Alite hydration mechanism in presence of ye’elimite related to BAY cements Londono-Zuluaga, Diana Tobón, Jorge Iván García-Aranda, Miguel Ángel Santacruz-Cruz, María Isabel Gómez-de-la-Torre, María de los Ángeles Cemento One alternative to decrease CO2 emissions from ordinary Portland Cement (OPC) production consists on the development of a new kind of eco-cements composed by less calcite demanding phases. That is the case of Belite-Ye’elimite-Ferrite (BYF) cements, which have β-belite as a main phase and ye’elimite as a secondary phase. But the low reactivity of β-belite is well known, consequently these materials develop low mechanical strengths at early/intermediate hydration ages. A possible solution proposed to solve this problem consists on the production of cements which contain belite, alite and ye'elimite together, known as Belite-Alite-Ye’elimite (BAY) cements. Consequently, the reaction of alite and ye'elimite with water would develop cements with higher mechanical strengths at early ages, while β- belite will contribute to later ages. The main objective of this work is to better understand the hydration behavior of monoclinic alite in presence of ye’elimite (both stoichiometric and pseudo-cubic polymorphs), in order to be compared with a BAY eco-cement systems. The hydration of systems with selected alite/ye’elimite ratios were studied for the first 24 hours. The main techniques used for this study were in-situ synchrotron X-ray powder diffraction combined with Rietveld methodology and isothermal calorimetry. 2019-10-08T08:35:50Z 2019-10-08T08:35:50Z 2019-10-08T08:35:50Z 2019-10-08 conference output https://hdl.handle.net/10630/18540 eng 15th International Congress on the Chemistry of Cement Praga (Republica Checa) 16/09/2019 http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional