RT Conference Proceedings
T1 Effect of alkanolamines in kaolinitic calcined clays pozzolanic reactivity.
A1 Koufany, Imane
A1 Santacruz-Cruz, María Isabel
A1 Rodríguez-Ruiz, María Dolores
A1 Bescher, Eric P.
A1 García-Aranda, Miguel Ángel
A1 Gómez-de-la-Torre, María de los  Ángeles
K1 Cemento
K1 Arcilla
AB Five kaolinitic clays with different amounts of kaolinite, ranging between ~70 wt% and ~30 wt%, havebeen studied to unravel the possible activation effect of alkanolamines on the aluminate fraction ofcalcined clays. This is of interest for enhancing the reactivity of LC3 binders. These clays were calcinatedat 860ºC for 4 h and ground to particle sizes of DV,50 ~10 μm. Three alkanolamines were selected:triisopropanolamine (TIPA), triethanolamine (TEA) and methyldiethanolamine (MDEOA), added in twodosages, 0.025 and 0.050 wt% (by weight of calcined clay, bwcc). The role of alkanolamines as activatorsin calcined clays was assessed following the ASTM c1897 standard bases on R3-tests. Concretely, first bymeasuring the heat evolved due to the pozzolanic reaction of the calcined clay and Ca(OH)2 (i.e. R3mixture) by isothermal calorimetry at 40ºC during 7 days, and second, the bounded water by measuringthe weight loss of R3 mixture after heating them at 350ºC.This study concludes that there is no significantactivation of the pozzolanic activity of kaolinitic calcined clays just by adding alkanolamines. However, amild activation was observed, i.e., higher heat evolved up to 7 days, by adding 0.05 wt% bwcc of TIPA,TEA and MDEOA to a high kaolinite content disordered metakaolin with high specific surface areacalcined clay.
YR 2023
FD 2023
LK https://hdl.handle.net/10630/27758
UL https://hdl.handle.net/10630/27758
LA eng
NO PID2020-114650RB-I00CTS cement corporationUniversidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 mar 2026