THE INFLUENCE OF CRUMB RUBBER ON THE FREEZE-THAW RESISTANCE OF CONCRETE

AUTHOR(S) / АУТОР(И): Marko Stojanović , Ksenija Janković , Dragan Bojović , Anja Terzić , Slobodan Šupić

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DOI: 10.46793/29DIMK.118S

ABSTRACT / САЖЕТАК:

Waste tires are a persistent challenge in waste management. To reduce environmental impact and utilize this material more effectively, its use in concrete mixtures has been studied. This research aims to incorporate waste materials into concrete production while ensuring acceptable performance. The study presents results where fine aggregate was partially replaced with crumb rubber (2.5% and 5% by volume). All mixtures were designed with a w/c= 0.55 and compared with a control and a mixture with a chemical air-entraining admixture. Fresh concrete properties were monitored after 10, 30, and 60 minutes. After 60 minutes, rubber-modified mixtures showed increased air content and decreased density. The hardened concrete with rubber had lower compressive strength but better resistance after 200 freeze-thaw cycles compared to the control.

KEYWORDS / КЉУЧНЕ РЕЧИ:

crumb rubber, air content, compressive strength, frost resistance

ACKNOWLEDGEMENT / ПРОЈЕКАТ:

This investigation is financially supported by the Ministry of Science, Technological Development and Innovation of the Republic of Serbia (Contract No.:451-03-136/2025-03/200012); Project: 101111694 — GREENCO — ERASMUS-EDU-2022-PI-ALL-INNO; Provincial Secretariat for Higher Education and Scientific Research in Vojvodina (Development of new binders based on agricultural and industrial waste from the area of Vojvodina for the production of eco-friendly mortars); and COST action CA22124: EU Circular Economy Network for All: Consumer Protection through reducing, reusing, repairing.

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