Pastes elaborated using hydraulic lime and calcined clays: analysis of capture of environmental CO2
DOI:
https://doi.org/10.24215/25456377e172Keywords:
Hydraulic Lime, Kaolinite Calcined Clay, Illite Calcined Clay, Hidratation, Carbonation, Carbon Dioxide,Abstract
During production of hydraulic lime, CO2 emissions are released into the atmosphere. On the other hand, the use of hydraulic lime as raw material for pastes and mortars allows a carbonation reaction to occur due to water action, owing to the contact of portlandite (CH) and CO2 diffused through the structure. This work aims to evaluate how the partial replacement of hydraulic lime by calcined clays of different pozzolanic reactivity in pastes affects the capture of environmental CO2. Hydraulic lime and two types of calcined clays, calcined kaolinite (KC) with more pozzolanic activity and calcined illite (IC) with slower pozzolanic activity, were used as raw materials. The pastes were made in triplicate, individually incorporating both types of calcined clays in different replacement percentages (0 - 50%). In order to perform a comparative analysis, two groups of samples were made, denominated (i) and (ii); both groups were stored in a humid room for 28 days and subsequently stored in isopropanol to stop the hydration process for the group (i) and the group (ii) was exposed to natural carbonation for one month. Carbonation was monitored using different techniques: X-ray diffraction analysis (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis, and phenolphthalein carbonation profile. It can be concluded that the addition of calcined clays as a partial replacement of hydraulic lime in pastes, affects the environmental CO2 capture: the use of IC increases the capture; meanwhile, the use of KC, with more pozzolanic activity, negatively affects the environmental CO2 capture.References
Antoni, M.; Roseen, J.; Martirena, F. & Scrivener, K. (2012) ?Cement substitution by a combination of metakaolin and limestone?, Cement and Concrete Research, 42, pp. 1579-1589.
Cordoba, G.P.; Zito, V.S.; Sposito, R.; Rahhal, V.F.; Tironi, A.; Thienel, Ch. & Irassar, E.F. (2020) ?Concretes with Calcined Clay and Calcined Shale: Workability, Mechanical, and Transport Properties?, Journal of Materials in Civil Engineering, American Society of Civil Engineers (ASCE), 32(8), 04020224.
Despotou, E.; Shtiza, A.; Schlegel, T. & Verhelst, F. (2016) ?Literature study on the rate and mechanism of carbonation of lime in mortars?, Mauerwerk, 20, pp. 124-137.
EuLA (European Lime Association) (2017) ?Innovation in the lime sector? [en línea]. Disponible en https://www.eula.eu/wp-content/uploads/2019/07/Innovation-in-the-Lime-Sector-.pdf
Fujita, S.; Suzuki, K.; Shibasaki, Y. & Mori, T. (2002) ?Synthesis of hydrogarnet from molten slag and its hydrogen chloride fixation performance at high temperature?, Journal of Material Cycles and Waste Management, 4, pp. 70-76.
Hartmann, A.; Khakhutov, M. & Buhl, J.-Ch. (2014) ?Hydrothermal synthesis of CSH-phases (tobermorite) under influence of Ca-formate?, Materials Research Bulletin, 51, pp. 389-396.
Hidalgo, A.; García, J.L.; Cruz Alonso, M.; Fernández, L. & Andrade, C. (2009) ?Microstructure development in mixes of calcium aluminate cement with silica fume or fly ash?, Journal of Thermal Analysis and Calorimetry, 96, pp. 335-345.
Lanas, J.; Pérez Bernal, J.L.; Bello, MA. & Alvarez Galindo, J.I. (2004) ?Mechanical properties of natural hydraulic lime-based mortars?, Cement and Concrete Research, 34, pp. 2191-2201.
Matschei, T.; Lothenbach, B. & Glasser, F.P. (2007) ?The AFm phase in Portland cement?, Cement Concrete Research, 37, pp. 118-130.
Murat, M. (1983) ?Hydration reaction and hardening of calcined clays and related minerals. I. Preliminary investigation on metakaolinite?, Cement and Concrete Research, 13(2), pp. 259-266.
Shi, Z.B.; Lothenbach, B.; Geiker, M.R.; Kaufmann, J. & Leemann, A. (2016) ?Experimental studies and thermodynamic modeling of the carbonation of Portland cement, metakaolin and limestone mortars?, Cement and Concrete Research, 88, pp. 60-72.
Tironi, A.; Sposito, R.; Cordoba, G.P.; Zito, S.V.; Rahhal, V.F.; Thienel, Ch. & Irassar, E.F. (2022) ?Influence of different calcined clays to the water transport performance of concretes?, Magazine of Concrete Research, 74(14), pp. 702-714.
Tironi, A.; Trezza, M.A.; Scian, A.N.; & Irassar, E.F. (2012) ?Kaolinitic calcined clays: Factors affecting its performance as pozzolans?, Construction and Building Materials, 28, pp. 276-281.
Yanguatin, H.; Ramírez, J.H.; Tironi, A. & Tobón, J.I. (2019) ?Effect of thermal treatment on pozzolanic activity of excavated waste clays?, Construction and Building Materials, 211, pp. 814-823.
Zhang, D.; Zhao, J.; Wang, D.; Wang, Y. & Ma, X. (2020) ?Influence of pozzolanic materials on the properties of natural hydraulic lime based mortars?, Construction and Building Materials, 244, 118360.
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