RT Conference Proceedings
T1 Activation of LC3 binders by C-S-H nucleation seeding with a new tailored admixture for low-carbon cements.
A1 Cuesta-García, Ana María
A1 Morales-Cantero, Alejandro
A1 Gómez-de-la-Torre, María de los  Ángeles
A1 Santacruz-Cruz, María Isabel
A1 Manzanec, Oliver
A1 Dalla-Libera, Alessandro
A1 Dhers, Sebastien
A1 Schwesig, Peter
A1 Borralleras, Pere
A1 García-Aranda, Miguel Ángel
K1 Cemento
AB The use of supplementary cementitious materials is currently the most favorablestrategy for reducing CO2 emissions in cements. Limestone Calcined Clay Cements,LC3, are a type of cement that allows the reduction of CO2 emissions up to 40%.The proportions of the mixtures can vary, but the most investigated combination,LC3-50, contains about 50 wt% clinker, 30 wt% calcined kaolinitic clay, 15 wt%limestone and an optimised calcium sulphate content. However, the mechanicalstrengths of LC3 at early ages are not good enough and they should be improved.One way of doing this is by employing commercial strength-enhancing (accelerator)admixtures based on C-S-H nucleation seeding. For this work, LC3-50 cements wereprepared with clays with varying kaolinite contents. Mortars and pastes were fabricatedusing a new PCE-based superplasticizer developed to avoid the loss of fluidityat early ages typical of LC3 binders. The selected accelerator for this study wasMaster X-Seed STE53. The results show that the loss of fluidity of LC3 mortars duringthe first hours could be solved by a recently developed PCE-based superplasticizer.The compressive strengths at 1 day for LC3 mortars strikingly improved by usingthe C-S-H seeding admixture and this behavior was maintained for up to 28 days.
YR 2023
FD 2023
LK https://hdl.handle.net/10630/27641
UL https://hdl.handle.net/10630/27641
LA eng
NO Partial funding from PID2020-114650RB-I00 research grant, which is co-funded by ERDF, is gratefully acknowledged.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026