Sarkaz, A.M.H.Danish, A.Memis, S.Yaprak, H.Gencel, O.Ozbakkaloglu, T.2024-02-052024-02-052024.01.010959-6526https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=dspace_ku&SrcAuth=WosAPI&KeyUT=WOS:001138754500001&DestLinkType=FullRecord&DestApp=WOShttps://hdl.handle.net/20.500.12597/19004Geopolymer technology offers several compelling ecological and economic advantages regarding waste management. This research investigates the effect of size (less than equal to 4 mm) and amount (5-15 vol%) of crumb rubber (CR) as fine aggregate on the physical, mechanical, and durability properties of geopolymers. The economic and ecological analyses were also performed to determine the effect of producing CR-based geopolymers on cost and the environment. The results revealed that the addition of CR negatively influences the physical, mechanical, and durability properties; nonetheless, incorporation of 5-10 vol% CR with a size less than 2 mm exhibited satisfactory performance fit for medium-strength structures such as foundations, partition walls, sidewalks, drainage structures, etc. Additionally, although the incorporation of CR slightly increases the pro-duction cost (3.99-11.97%) and embodied energy (0.08-0.24%) of resulting geopolymers, the embodied CO2 emission of 5, 10, and 15 vol% CR-incorporated geopolymer mixes is 90.4,-143.6 and-377.6 kgCO2e/m3, respectively. In contrast, the embodied CO2 emissions of conventional geopolymer mix is 324.4 kgCO2e/m3, which shows the negative carbon emission potential of CR-modified geopolymers, providing a glimmer of hope for sustainable development in the construction industry.eninfo:eu-repo/semantics/openAccessCrumb rubberFine aggregateGeopolymerNegative carbon emissionsSustainable developmentArticle10.1016/j.jclepro.2023.1398420011387545000014341879-1786