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PERFORMANCE INVESTIGATION OF ECOCONCRETE WITH RECYCLED AGGREGATES ENHANCED BY NANOPARTICLES
Abstract
In the context of sustainable development and the urgent need to reduce the environmental footprint of the construction industry, the reuse of recycled concrete waste in mortar formulations has emerged as a promising strategy. However, the incorporation of such waste materials typically leads to diminished mechanical performance, primarily due to the reduced chemical activity of the recycled aggregates. To address this drawback, nanoparticles have gained attention as functional additives capable of restoring or even enhancing the structural integrity of cement-based composites. This preliminary study investigates the effect of two types of nanoparticles, Nano-Silica Powder and Multi-Walled Carbon Nanotubes on the mechanical properties of mortars incorporating recycled concrete waste at two different dosages. The prepared specimens were subjected to standardized compressive strength and flexural tensile strength tests to evaluate the reinforcing effects and variability induced by these nanomaterials. Experimental results demonstrated a significant improvement in compressive strength, particularly in mixtures containing nano-silica, which can be attributed to its pozzolanic activity, filler effect, and refinement of the pore structure. In contrast, flexural strength results exhibited considerable variability, likely stemming from challenges in achieving homogeneous nanoparticle dispersion and the complex interactions between nanoparticles and the cementitious matrix. Beyond their physical and chemical contributions, nanoparticles exhibit behaviors that stem from quantum-scale phenomena, including quantum confinement, surface energy effects, and tunneling. These characteristics, while not yet fully understood in the context of cementitious materials, are believed to play a role in modifying the hydration kinetics and bonding mechanisms at the nanoscale. Such effects open new avenues for manipulating material behavior at a fundamental level. The findings of this study suggest that nanoparticles can act as effective reinforcement agents in ecoconcrete, providing a pathway to partially or fully recover the mechanical properties lost due to the use of recycled components. This work provides a foundational basis for future research that aims to leverage nanotechnology and, potentially, quantum-scale interactions to engineer sustainable and high-performance construction materials.
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References9
UNEP (United Nations Environment Programme), Global Status Report for Buildings and Construction, 2022. Available at - https://www.unep.org/ resources/report/global-status-report-buildings-and-construction
Habert, G., d�Espinose de Lacaillerie, J. B., & Roussel, N., An environmental evaluation of geopolymer based concrete production: Reviewing current research trends. Journal of Cleaner Production, 279, 123558, 2020. https://doi.org/10.1016/ j.jclepro.2020.123558
Lepadatu D., Barbuta M., Rujanu M., Loredana Judele, Raluca Mitroi, Fly ash concrete with fibers: comparison of tensile strength using neural network and design of experiments methods, Environmental Engineering and Management Journal, Vol. 17 Issue 6, 2018, pp:1321-1328. Available at: https://eemj.eu/index.php /EEMJ/ article/view/3595 DOI: 10.30638/eemj.2018.131
Poon, C. S., & Kou, S. C., Properties of concrete prepared with RCA and nano-materials. In Waste and Supplementary Cementitious Materials in Concrete, Woodhead Publishing, 2019, pp. 333�354.
Da Silva, M. J., De Brito, J., & Kurda, R., Recycled aggregates for concrete production: A global review of performance and environmental benefits. Resources, Conservation and Recycling, 189, 106847, 2023. https://doi.org/10.1016/ j.resconrec. 2022.106847
Zhang, M. H., Islam, J., & Peethamparan, S., Use of nanoparticles in concrete: A review of performance and challenges. Construction and Building Materials, 301, 124236, 2021. DOI: 10.1016/j.conbuildmat.2021.124236
Nazari, A., & Bagheri, A., Recent advances in application of nanoparticles in sustainable cementitious materials: A review. Cement and Concrete Composites, 130, 104473, 2022. DOI: 10.1016/j.cemconcomp.2022.104473
Allujami M. et. al., Nanomaterials in recycled aggregates concrete applications: mechanical properties and durability. A review. Cogent Engineering. 9(1). 2122885, 2022. https://doi,orgDOI: 10.1080/23311916.2022.2122885
Peimin Zhan, Jing Xu, Juan Wang, Junqing Zuo, Zhihai He, A review of recycled aggregate concrete modified by nanosilica and graphene oxide: Materials, performances and mechanism, Journal of Cleaner Production, Volume 375, 134116, 2022. DOI: 10.1016/j.jclepro.2022.134116
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