RT Conference Proceedings
T1 Materiales puzolánicos para bajar las emisiones de CO2: soluciones locales para un problema global.
T2 Pozzolanic materials to reduce CO2 emissions: local solutions for a global issue.
A1 Gómez-de-la-Torre, María de los  Ángeles
A1 Koufany, Imane
A1 Redondo-Soto, Cinthya
A1 Guirado-Rodríguez, Beatriz
A1 Benjumea-Rejano, Eva M.
A1 Gómez-García, Francisco
A1 Cuesta-García, Ana María
A1 Santacruz-Cruz, María Isabel
A1 Rodríguez-Ruiz, María Dolores
A1 García-Aranda, Miguel Ángel
K1 Cemento - Resistencia química
K1 Puzolanas
AB In recent decades, the cement sector has been looking for solutions to reduce the carbon footprint, being one of the most promising strategies, the replacement of clinker with supplementary cementitious materials, SCMs. However, the main limitation of this approach is the availability of suitable SCMs.This work presents the study of three families of pozzolanic materials, Spanish calcined clays (CC), Natural Pozzolans (NP) and fly ashes (FA). The characterization of each family will be presented, with emphasis on the kaolinite content of the original clays and the amorphous contents of the natural pozzolans and fly ashes.The results of the pozzolanic prediction tests will be compared: strength activity index, SAI, and R3 test according to ASTM C1897-20.The SAI test has two important limitations: i) it gives false positives at 28 days, as does the addition of quartz (Qz) and ii) a minimum of 28 days is required to obtain the pozzolanic activity results.In addition, the R3 test has proved to be useful in ruling out inert additions, such as quartz. Moreover, it presents a very good correlation between the heat emitted and the combined water at 7 days and the amount of kaolinite in clays or amorphous in ashes. However, the absolute values of heat and combined water cannot be compared between different families. That is, in the calcined clay family, it can be inferred that if the kaolinite content is higher than 50 wt%, the heat released should be between 500-700 J/g, whereas a fly ash with an amorphous content of around 70 wt% will release between 200-250 J/g.
YR 2023
FD 2023
LK https://hdl.handle.net/10630/28168
UL https://hdl.handle.net/10630/28168
LA eng
NO Abstract de una keynote invitada.
NO PID2020-114650RB-I00 grant from Spanish government, Master Builders Solutions Deutschland GmbH (Germany) and Buzzi Unicem SpA (Italy) are thanked for the funding.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026