VILNIUS TECH Library invites you to follow the published new dissertations. The dissertation „Resistance of technological waste-modified concrete to freeze–thaw cycles and alkaline corrosion“  („Technologinėmis atliekomis modifikuoto betono atsparumas užšaldymo ir atšildymo ciklams bei šarminei korozijai“) prepared at VILNIUS TECH by Edvinas Pocius. The dissertation was prepared in 2021–2026. Scientific consultant – Prof. Dr Džigita Nagrockienė. The dissertation was defended at the public meeting of the Dissertation Defence Council of the Scientific Field of Materials Engineering in the Aula Doctoralis Meeting Hall of Vilnius Gediminas Technical University at 10 a.m. on 8 June 2026. The dissertation investigates concrete modified with glass processing waste, concrete sludge, and a crystallizing additive. The goal is to develop concrete that is resistant to freeze–thaw cycles and alkali–silica reaction (ASR) by replacing part of the cement with glass waste and sand with concrete sludge. By selecting the optimal amount of technological waste, the aim is to improve the basic properties of concrete while maintaining its resistance to freeze–thaw cycles and alkali–silica reaction. The tasks addressed in the work include the analysis of glass processing waste and concrete sludge, evaluating their impact on the properties of the cement paste. After determining the recommended waste content, the physical and mechanical properties of the modified concrete are investigated, focusing on resistance to freeze–thaw cycles and alkali–silica reaction. This research sequence aims to substantiate the basic properties and resistance to freeze–thaw cycles and alkali–silica reaction of the newly developed material. The dissertation consists of an introduction, three chapters, general conclusions, a list of references, a list of the author‘s scientific publications, and a summary in English. The Introduction discusses the research problem and relevance, describes the object of research, formulates the aim and tasks, and outlines the research methodology, scientific novelty, practical significance, and statements for defence. The First Chapter discusses active mineral substances, their formation and use in concrete production. It discusses the generation of concrete sludge and glass waste, as well as the impact of their use on the physical and mechanical properties and durability of concrete. The durability of waste-modified concrete and the assessment of carbon dioxide emissions are also described. Conclusions are formulated, and the objectives of the dissertation are refined at the end of the chapter. The Second Chapter presents the materials used, their properties, and their formation. It describes the research methods and equipment chosen to investigate the structure and properties of the concrete and to calculate its CO2 emissions. The Third Chapter substantiates recommended dosages of glass waste and concrete sludge and their effects on cementitious systems. Glass waste was found suitable for cement replacement, and dry sludge for fine aggregate. An environmental impact assessment was also performed. Five scientific articles were published on the dissertation topic in the Web of Science database, Science Citation Index Expanded, peer-reviewed publications with a citation index. Doctoral dissertation readers can search via VILNIUS TECH Virtual Library.

DEAR FINAL YEAR STUDENT, We would like to inform you that, along with your official university diploma, you have the opportunity to receive a printed PORTFOLIO OF COMPETENCIES. This is an official university-issued document recognizing the skills and competencies you have developed through activities for which VILNIUS TECH digital badges can be awarded. To explore the full range of VILNIUS TECH digital badges, please click here: https://www.badgecraft.eu/en/organisations/16808. To receive the Portfolio of Competencies, you must have at least 3 VILNIUS TECH digital badges in your badge wallet and ensure that you are registered with your full name (using Latin characters) on the badgecraft.eu platform or the BadgeWallet app. If you have collected badges using a different email address, please add your VILNIUS TECH email in the settings. If you already have at least three badges, register no later than June 11th, 2026 (inclusive) by completing this form FORM TO RECEIVE COMPETENCY PORTFOLIO for DIGITAL BADGES (2026) – Fill out form You will receive the printed Portfolio of Competencies along with your university diploma. A digital version (.pdf format) will also be sent to your email. DON’T HAVE ENOUGH BADGES? Many of them can be awarded “for the past.” All you need to do is log in to the VILNIUS TECH Digital Badge System, review your past activities, submit evidence, and wait for approval. Need a clearer plan? Visit https://www.badgecraft.eu/en/organisations/16808. Select the area of activity you were involved in. Check which digital badges you could qualify for. If eligible, log in (or create an account). Complete the tasks associated with the desired badges. * Wait for program administrators to approve (or reject) your evidence. Enjoy your new badges and check if you can earn even more through other badge programs. Collect all the VILNIUS TECH digital badges you’re entitled and get a proof of your activity. *If you see the “Start Mission” button, submit the required evidence, wait for approval, and your new badge will appear in your wallet! If the “Start Mission” button is not available, reply to this email and list all the badges (with links) that you believe you should receive. Include a brief description (1–2 sentences) indicating the year and nature of the activity. Badge program administrators will review your evidence and issue the badge if approved. For more information about the VILNIUS TECH digital badge system, visit: https://vilniustech.lt/studies/digital-badge-system/362195 If you have questions or need assistance, feel free to ask by replying to this email at badge@vilniustech.lt. VILNIUS TECH Digital Badge Team