2026-05-31T09:29:41Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/226802026-02-03T11:20:02Zcom_10630_2254col_10630_37953

Phase and microstructure evolutions in LC3 binders by multi-technique approach including synchrotron microtomography Bernal, Isabel M.R. Shirani, Shiva Cuesta-García, Ana María Santacruz-Cruz, María Isabel García-Aranda, Miguel Ángel Microestructura Porosidad 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 mechanical strength performances after one week, if the kaolinite contents of the raw clays are above ~40 wt%. Durability properties are also maintained or even enhanced. Here, it is used a multi-technique approach to understand the phase and microstructure developments. From the thermal analysis, partial limestone reactivity is proven. Chiefly, high-resolution synchrotron microtomography has been employed, for the first time in these systems, to characterize their microstructures. The measured total porosities, within our 1 lm spatial resolution (voxel size 0.32 lm), were 16.6, 10.0 and 2.4 vol% at 7, 8 and 60 days of hydration, respectively. Pore connectivity strongly decreases with hydration time due to the chemical reactions producing new phases filling the pores. The 6-connected porosity fractions were 92, 78, and 9% at 7, 8 and 60 days. The reactions filling the pores were investigated by Rietveld quantitative phase analysis and 27Al MAS-NMR. 2021-07-22T08:07:52Z 2021-07-22T08:07:52Z 2021-06-19 journal article Construction and Building Materials 300 (2021) 124054 https://hdl.handle.net/10630/22680 https://doi.org/10.1016/j.conbuildmat.2021.124054 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier