@misc{10481/93770,
year = {2024},
month = {8},
url = {https://hdl.handle.net/10481/93770},
abstract = {This study aims to achieve an in-depth understanding of the manufacturing process of natural hydraulic lime
(NHL) by assessing the influence of raw materials' chemical- mineralogical composition and the effect of the
slaking process. NHLs with variable hydraulicity were manufactured using 56 raw materials from carbonate
outcrops in Andalusia (Spain). This study shows that siliceous limestones with microcrystalline quartz generate
hydraulic phases after calcination. However, when the amount of this reactive silica exceeds 18% by weight, CaO
is not formed, and only calcium silicates appear. It was also found that slaking of NHL leads to partial hydration
of the most reactive calcium silicates, reducing the expected reactivity of the lime. Instead, exposure of NHL
quicklimes to environmental relative humidity promotes the formation of disordered portlandite and reduces the
partial hydration of hydraulic phases. Our findings demonstrate that standard slaking can be replaced by
alternative methods for the studied binders.},
organization = {State Research Agency (SRA) and the
Ministry of Science and Innovation under the Research Project PID2020-
119838RA-I00},
organization = {Regional Ministry of University Research and
Innovation of the Junta de Andalucía and FEDER (a way of making
Europe) B-RNM-188-UGR20},
organization = {Junta de Andalucía Research
Group RNM179},
publisher = {Elsevier},
keywords = {Hydraulicity},
keywords = {Reactive silica},
keywords = {Calcium silicates},
title = {The manufacture of natural hydraulic limes: Influence of raw materials' composition, calcination and slaking in the crystal-chemical properties of binders},
doi = {10.1016/j.cemconres.2024.107631},
author = {Parra-Fernández, Clara and Arizzi, Anna and Secco, Michele and Cultrone, Giuseppe V.},
}