RT Journal Article
T1 Phase and microstructure evolutions in LC3 binders by multi-technique approach including synchrotron microtomography
A1 Bernal, Isabel M.R.
A1 Shirani, Shiva
A1 Cuesta-García, Ana María
A1 Santacruz-Cruz, María Isabel
A1 García-Aranda, Miguel Ángel
K1 Microestructura
K1 Porosidad
AB Limestone Calcined Clay Cements, LC3, are attracting a lot of attention as it is possible to reduce the clinkerfactor by 50%, which means a cement CO2 footprint reduction of 40%. This is compatible with maintainingthe mechanical strength performances after one week, if the kaolinite contents of the raw claysare above ~40 wt%. Durability properties are also maintained or even enhanced. Here, it is used amulti-technique approach to understand the phase and microstructure developments. From the thermalanalysis, partial limestone reactivity is proven. Chiefly, high-resolution synchrotron microtomographyhas been employed, for the first time in these systems, to characterize their microstructures. The measuredtotal porosities, within our 1 lm spatial resolution (voxel size 0.32 lm), were 16.6, 10.0 and2.4 vol% at 7, 8 and 60 days of hydration, respectively. Pore connectivity strongly decreases with hydrationtime due to the chemical reactions producing new phases filling the pores. The 6-connected porosityfractions were 92, 78, and 9% at 7, 8 and 60 days. The reactions filling the pores were investigated byRietveld quantitative phase analysis and 27Al MAS-NMR.
PB Elsevier
YR 2021
FD 2021-06-19
LK https://hdl.handle.net/10630/22680
UL https://hdl.handle.net/10630/22680
LA eng
NO Construction and Building Materials 300 (2021) 124054
NO Financial support from research grant No. PID2019-104378RJI00(Spanish Ministry) and No. UMA18-FEDERJA-095 (Junta deAndalucía and Universidad de Málaga), are gratefully acknowledged.SLS is thanked for granting beamtime at TOMCAT beamline.We also thank Dr. Olbinado (SLS) for her support during synchrotrondata collection. Funding for open access charge: Universidadde Málaga/CBUA.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026