@misc{10481/106169,
year = {2025},
month = {7},
url = {https://hdl.handle.net/10481/106169},
abstract = {Aminotris(methylene phosphonic acid) (ATMP) and poly(acrylic acid) sodium salt (PAA)
have shown favorable results in the treatment of porous building materials against weathering damage, showing promising potential as mixed-in additives during the production of
lime-based mortars. This study investigates the impact of these additives on microstructure
and mechanical properties. Additives were introduced in various concentrations to assess
their influence on CaCO3 crystallization, porosity, strength, and carbonation behavior. Results revealed significant modifications in the morphology of CaCO3 precipitates, showing
evidence of nanostructured CaCO3 aggregates and vaterite stabilization, thus indicating a
non-classical crystallization pathway through the formation of amorphous CaCO3 phase(s),
facilitated by organic occlusions. These nanostructural changes, resembling biomimetic
calcitic precipitates enhanced mechanical performance by enabling plastic deformation and
intergranular bridging. Increased porosity and pore connectivity facilitated CO2 diffusion
towards the mortar matrix, contributing to strength development over time. However,
high additive concentrations resulted in poor mechanical performance due to the excessive
air entrainment capabilities of short-length polymers. Overall, this study demonstrates
that the optimized dosages of ATMP and PAA can significantly enhance the durability
and mechanical performance of lime-based mortars and suggests a promising alternative
for the tailored manufacturing of highly compatible and durable materials for both the
restoration of cultural heritage and modern sustainable construction.},
organization = {European Union’s Horizon 2020 - Marie Sklodowska-Curie project SUBLime (grant agreement
no. 955986)},
organization = {Bijzonder Onderzoeksfonds (BOF)},
organization = {European Union’s Horizon 2020 - Transnational Access (grant agreement no. 101005611)},
organization = {Spanish Government (grant PID2021-125305NB-I00)},
organization = {Junta de Andalucía (grant P20_00675)},
organization = {University of Granada (UCE-PP2016-05)},
publisher = {MDPI},
keywords = {lime mortar},
keywords = {microstructure},
keywords = {porosity},
keywords = {poly(acrylic acid) sodium salt (PAA)},
keywords = {aminotris(methylene phosphonic acid) (ATMP)},
title = {Impact of Mixed-In Polyacrylic- and Phosphonate-Based Additives on Lime Mortar Microstructure},
doi = {10.3390/ma18143322},
author = {Valdez-Madrid, Dulce Elizabeth and Ruiz-Agudo, Encarnación and Bonilla-Correa, Sarah and De Belie, Nele and Cnudde, Veerle},
}