MICRO-MECHANICAL AND HYDRATION PROPERTIES OF SUSTAINABLE CONCRETE WITH GROUND GLASS POZZOLAN AS A CEMENT REPLACEMENT

AUTHOR(S) / AUTOR(I): Marija Krstic

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DOI: 10.46793/29DIMK.050K

ABSTRACT / SAŽETAK:

This study is part of a broader investigation into sustainable concrete, focusing on the use of ground glass pozzolan (GGP) as a substitute for Portland cement (PC) across microstructure, macrostructure, and field applications. To evaluate performance of GGP comprehensively, six concrete mixtures were designed: three control mixes (CM, FA-30, S-40) and three GGP-based mixes (G-20, G-30, G-40), with mortar and cement pastes following the same cement replacement ratios. Hydration properties of cement pastes up to 100 days were analyzed using quantitative and qualitative methods such as SEM/BSE, TGA and XRD. Findings indicated increased CH consumption in GGP systems, particularly in G-40, confirming its pozzolanic reactivity. Micro-mechanical analysis via nanoindentation showed G-40 exhibited the highest elastic modulus and hardness, indicating enhanced material performance. These findings contribute to a deeper understanding of microstructure development and the beneficial role of GGP in cementitious matrices.

KEYWORDS / KLJUČNE REČI:

Sustainable Concrete, Recycled Materials, Ground Glass Pozzolan, Micro-Mechanical Properties, Hydration Properties

ACKNOWLEDGEMENT / PROJEKAT:

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