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Researchers are working on the recycled asphalt. LabIC.UGR<\/a>\u00a0<\/p>\n
Curbing cigarette waste <\/p>\n
Cigarette butts have long been a predominant form of waste, and their environmental impact is staggering.\u00a0<\/p>\n
Filter cigarettes alone contribute to an overwhelming amount of waste, with the World Health Organization (WHO) estimating roughly 4.5 trillion<\/a> filters are discarded annually.\u00a0<\/p>\n And with the rise of e-cigarettes<\/a>, especially among young people, that number is only climbing. Unfortunately, this number is projected to climb to a staggering 9 trillion by the end of 2025.<\/p>\n The massive waste chokes waterways, taints landscapes, and lingers for years.<\/p>\n This is where innovation steps in.\u00a0<\/p>\n For instance, Lithuanian scientists in 2023 developed a method to repurpose cigarette waste into biodiesel. This was possible because triacetin, a vital compound for biodiesel production<\/a>, is abundant in cigarette filters.\u00a0<\/p>\n Now, researchers are recycling cigarette butts \u2013 particularly those from e-cigarettes due to their high fiber content \u2013 to use as an additive in road construction.<\/p>\n In this work<\/a>, the journey begins at the University of Bologna\u2019s Department of Civil, Chemical, Environmental, and Materials Engineering. The team has developed a process to create specialized pellets from cigarette butts.\u00a0<\/p>\n The process involves first removing the organic ash, then crushing the remaining cellulose fibers and PLA plastic.\u00a0<\/p>\n This material is then mixed with a special wax (Fischer-Tropsch-type), acting as a binder, and undergoes a process of pressing, heating, and cold cutting to form these innovative pellets.<\/p>\n Crack-resistant asphalt <\/p>\n The next step takes place at the University of Granada\u2019s Building Engineering Laboratory (LabIC.UGR) \u2014 a world leader in sustainable asphalt materials.<\/p>\n The team evaluated the strength of asphalt made with 40% recycled material from old roads and pellets derived from e-cigarette butts.<\/p>\n It\u2019s pure alchemy!\u00a0<\/p>\n When these pellets meet hot bitumen during asphalt manufacturing, the wax melts, releasing the recycled cellulose and plastic fibers.\u00a0<\/p>\n The fibers powerfully reinforce the asphalt and boost its crack resistance.<\/p>\n But there\u2019s more: the material also functions as a binder, allowing for even higher rates of recycled material and making the asphalt more ductile and flexible.<\/p>\n An added benefit is that the presence of the waxes helps reduce the manufacturing temperature, saving energy and cutting down on harmful emissions<\/p>\n Interestingly, the tests showcased that asphalt made with these pellets offers superior crack resistance under both traffic loads and temperature changes compared to conventional asphalt.\u00a0<\/p>\n<\/p>\n As the authors stated in their study paper: \u201cOverall, this study confirms the possible use of recycling agent-encapsulated fibre pellets derived from [cigarettes] in mixtures containing RAP, with the potential effects on improving fatigue resistance.\u201d\u00a0<\/p>\n This new research highlights the growing emphasis on sustainability and the circular economy<\/a> within road engineering.\u00a0<\/p>\n