RT Conference Proceedings
T1 In-situ Molibdenum X-ray powder diffraction study of the early hydration of cementitious systems on a humidity chamber
A1 Londono-Zuluaga, Diana
A1 Tobón, Jorge Iván
A1 García-Aranda, Miguel Ángel
A1 León-Reina, Laura
A1 Santacruz-Cruz, María Isabel
A1 Gómez-de-la-Torre, María de los  Ángeles
K1 Cemento
AB The durability of cement-based construction materials depends on the environmental conditions during their servicelife. A further factor is the microstructure of the cement bulk, established by formation of cement hydrates. Thedevelopment of the phases and microstructure under given conditions is responsible of the high strength of cementitiousmaterials. The investigation on the early hydration behavior of cements and cementing systems has been for a long timea very important area of research: understanding the chemical reactions that lead to hardening is fundamental for theprediction of performances and durability of the materials.The production of 1 ton of Ordinary Portland Cement, OPC, releases into the atmosphere ~0.97 tons of CO2. Thisimplies that the overall CO2 emissions from the cement industry are 6% of all anthropogenic carbon dioxide. Analternative to reduce the CO2 footprint consists on the development of eco-cements composed by less calcite demandingphases, such as belite and ye'elimite. That is the case of Belite-Ye’elimite cements (BY). Since the reactivity of belite isnot quick enough, these materials develop low mechanical strengths at intermediate hydration ages. A possible solutionto this problem goes through the production of cements which jointly contain alite with the two previously mentionedphases, named as Belite-Alite-Ye’elimite (BAY) cements. The reaction of alite and ye'elimite with water will developcements with high mechanical strengths at early ages, while belite will contribute to later values.The final goal is to understand the hydration mechanisms of a variety of cementing systems (OPC, BAY and purephases) as a function of water content, superplasticizer additives and type and content of sulfate source. In order to doso, in-situ laboratory humidity chambers with Molybdenum X-ray Powder diffraction are employed. In the first 2h ofhydration, reaction degree (α) of ye'elimite had been decreased for superplasticizer.
YR 2016
FD 2016-07-06
LK http://hdl.handle.net/10630/11766
UL http://hdl.handle.net/10630/11766
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 26 ene 2026