Durability Assessment for Mortar Containing LDH Additives

Rizescu, Claudiu Eduard; Zaulet, Ionut; Gheboianu, Anca Irina; Ion, Rodica Mariana

doi:10.2478/bsmm-2023-0014

Abstract

This study investigates the potential of Layered Double Hydroxides (LDH) as additives to improve the durability and physical properties of cement-based mortars, with a focus on freeze-thaw resistance. Three LDH types—MgAl-LDH, CaAl-LDH, and ZnAl-LDH—were synthesized and incorporated into mortar at a 1/1000 w/w ratio. X-ray diffraction (XRD) and wavelength dispersive X-ray fluorescence spectroscopy (WDXRF) were used to characterize the LDHs, and the effects of the additives on mortar density, water absorption, and durability under 30 freeze-thaw cycles were examined. Results revealed that MgAl-LDH provided the best freeze-thaw resistance, likely due to its smaller crystallite size and enhanced cement hydration. CaAl-LDH offered moderate improvements, while ZnAl-LDH negatively impacted the mortar’s mechanical integrity, leading to higher degradation. The study demonstrates the potential of LDH additives—particularly MgAl-LDH—in improving the durability of cementitious materials, although further optimization is required to enhance long-term performance and resistance to environmental stresses.

References

Construction, The concrete conundrum, Chemistry World. (2008). www.chemistryworld.org.
Search in Google Scholar Back to article
X. Pang, Y. Yuan, H. Liu, X. Pang, L. Chen, Y. Liu, Y. Shi, S. Li, Highly dispersed and thermally stable PCE-LDH and its application as hardening accelerator for mortar, Construction and Building Materials. 328 (2022) 127072. https://doi.org/10.1016/j.conbuildmat.2022.127072
Search in Google Scholar Back to article
Y. Wang, L. Lei, J. Liu, Y. Ma, Y. Liu, Z. Xiao, C. Shi, Accelerators for normal concrete: A critical review on hydration, microstructure and properties of cement-based materials, Cement and Concrete Composites. 134 (2022) 104762. https://doi.org/10.1016/j.cemconcomp.2022.104762.
Search in Google Scholar Back to article
T. Meagher, N. Shanahan, D. Buidens, K.A. Riding, A. Zayed, Effects of chloride and chloride-free accelerators combined with typical admixtures on the early-age cracking risk of concrete repair slabs, Construction and Building Materials. 94 (2015) 270–279. https://doi.org/10.1016/j.conbuildmat.2015.07.003.
Search in Google Scholar Back to article
J. Holm, Comparison of the Corrosion Potential of Calcium Chloride and a Calcium Nitrate Based on Non-Chloride Accelerator, ACI Symposium Publication. SP-102 (1987) 35 – 48. https://doi.org/10.14359/1637.
Search in Google Scholar Back to article
S. Aggoun, M. Cheikh-Zouaoui, N. Chikh, R. Duval, Effect of some admixtures on the setting time and strength evolution of cement pastes at early ages, Construction and Building Materials. 22 (2008) 106–110. https://doi.org/10.1016/j.conbuildmat.2006.05.043.
Search in Google Scholar Back to article
P.J. Sandberg, F. Doncaster, On the mechanism of strength enhancement of cement paste and mortar with triisopropanolamine, Cement and Concrete Research. 34 (2004) 973–976. https://doi.org/10.1016/j.cemconres.2003.11.018.
Search in Google Scholar Back to article
M. Delhorme, C. Labbez, M. Turesson, E. Lesniewska, C.E. Woodward, B. Jönsson, Aggregation of Calcium Silicate Hydrate Nanoplatelets, Langmuir. 32 (2016) 2058–2066. https://doi.org/10.1021/acs.langmuir.5b03846.
Search in Google Scholar Back to article
T.B. Min, I.S. Cho, W.J. Park, H.K. Choi, H.S. Lee, Experimental study on the development of compressive strength of early concrete age using calcium-based hardening accelerator and high early strength cement, Construction and Building Materials. 64 (2014) 208–214. https://doi.org/10.1016/j.conbuildmat.2014.04.053.
Search in Google Scholar Back to article
V. Kanchanason, J. Plank, Role of pH on the structure, composition and morphology of C-S-H–PCE nanocomposites and their effect on early strength development of Portland cement, Cement and Concrete Research. 102 (2017) 90–98. https://doi.org/10.1016/j.cemconres.2017.09.002.
Search in Google Scholar Back to article
X. Pang, P.J. Boul, W.C. Jimenez, Nanosilicas as accelerators in oilwell cementing at low temperatures, SPE/IADC Drilling Conference, Proceedings. 2 (2014) 1071–1081. https://doi.org/10.2118/168037-ms.
Search in Google Scholar Back to article
H. Du, S.D. Pang, High performance cement composites with colloidal nano-silica, Construction and Building Materials. 224 (2019) 317–325. https://doi.org/10.1016/j.conbuildmat.2019.07.045.
Search in Google Scholar Back to article
Y. Wu, P. Duan, C. Yan, Role of layered double hydroxides in setting, hydration degree, microstructure and compressive strength of cement paste, Applied Clay Science. 158 (2018) 123–131. https://doi.org/10.1016/j.clay.2018.03.024.
Search in Google Scholar Back to article
S. Xu, Z. Chen, B. Zhang, J. Yu, F. Zhang, D.G. Evans, Facile preparation of pure CaAl-layered double hydroxides and their application as a hardening accelerator in concrete, Chemical Engineering Journal. 155 (2009) 881–885. https://doi.org/10.1016/j.cej.2009.08.003.
Search in Google Scholar Back to article
X. Pang, Y. Liu, L. Chen, Y. Zhong, Z. Li, M. Liu, S. Li, Preparation and formation mechanism of pure phase Ca2Al-layered double hydroxides nanosheets synthesized by a T-type microchannel reactor: Application as hardening accelerator for mortar, Applied Clay Science. 166 (2018) 174–180. https://doi.org/10.1016/j.clay.2018.09.005.
Search in Google Scholar Back to article
L. Yang, P. Zhao, C. Liang, M. Chen, L. Niu, J. Xu, D. Sun, L. Lu, Characterization and adaptability of layered double hydroxides in cement paste, Applied Clay Science. 211 (2021) 106197. https://doi.org/10.1016/j.clay.2021.106197.
Search in Google Scholar Back to article
C.E. Rizescu, D.A. Vasile, D.A. Minea, R.-M. Stirbescu, L. Marin, I. Atkinson, L. Predoana, R.-M. Ion, Layered Double Hydroxides as Consolidants and Anion Absorbents for Heritage Conservation, Proceedings. 57 (2020) 84. https://doi.org/10.3390/proceedings2020057084.
Search in Google Scholar Back to article
J.C. Shen, H.Y. Zeng, C.R. Chen, S. Xu, A facile fabrication of Ag2O-Ag/ZnAl-oxides with enhanced visible-light photocatalytic performance for tetracycline degradation, Applied Clay Science. 185 (2020) 105413. https://doi.org/10.1016/j.clay.2019.105413.
Search in Google Scholar Back to article
Y. Yang, L. Yan, J. Li, J. Li, T. Yan, M. Sun, Z. Pei, Synergistic adsorption and photocatalytic reduction of Cr(VI) using Zn-Al-layered double hydroxide and TiO2 composites, Applied Surface Science. 492 (2019) 487–496. https://doi.org/10.1016/j.apsusc.2019.06.229.
Search in Google Scholar Back to article
C.M. Chou, Y.C. Chang, P.S. Lin, F.K. Liu, Growth of Cu-doped ZnO nanowires or ZnO-CuO nanowires on the same brass foil with high performance photocatalytic activity and stability, Materials Chemistry and Physics. 201 (2017) 18–25. https://doi.org/10.1016/j.matchemphys.2017.08.023.
Search in Google Scholar Back to article
H. Zhang, W. Guo, N. Lu, B. Fan, Solvent-free selective oxidation of aromatic alcohol with O2 over MgAl-LDH supported Pd nanoparticles: Effects of preparation methods and solvents, Materials Chemistry and Physics. 252 (2020) 123193. https://doi.org/10.1016/j.matchemphys.2020.123193.
Search in Google Scholar Back to article
C. Liu, W. Gai, S. Pan, Z. Liu, The exothermal behavior in the hydration process of calcium phosphate cement, Biomaterials. 24 (2003) 2995–3003. https://doi.org/10.1016/S0142-9612(03)00125-X.
Search in Google Scholar Back to article

Durability Assessment for Mortar Containing LDH Additives

Abstract

Paradigm

My account