{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T01:19:02Z","timestamp":1760059142835,"version":"build-2065373602"},"reference-count":50,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2025,5,28]],"date-time":"2025-05-28T00:00:00Z","timestamp":1748390400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Interface Mission","award":["01\/C05-i02\/2022"],"award-info":[{"award-number":["01\/C05-i02\/2022"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Waste"],"abstract":"<jats:p>CO2 emissions, a significant contributor to climate change, have spurred the exploration of sustainable solutions. One putative solution involves using recycled aggregates (RAs) from construction and demolition waste (CDW) to substitute natural sand in construction materials. This not only extends the life cycle of the waste but also reduces the use of natural resources. The potential to capture CO2 in RAs presents a promising route to mitigate the environmental impact of the construction industry and contribute to its much anticipated decarbonization. This research takes a unique approach by investigating the incorporation of an amine-based additive\u2014specifically 2-amino-2-methyl-1,3-propanediol (AMPD)\u2014to enhance CO2 capture into a real-case RA from recycling plants, transforming CDW with low carbon-capture potential into a highly reactive CO2 capture material. Through TG analysis, FTIR-ATR and the combination of both (TG-FTIR), we were able to validate the use of RA materials as a support medium and quantify the CO2 capture potential (12%) of the AMPD amine; a dual valorization was achieved: new value was added to low-quality CDW and we enhanced CO2 sequestration, offering hope for a more sustainable future.<\/jats:p>","DOI":"10.3390\/waste3020017","type":"journal-article","created":{"date-parts":[[2025,5,28]],"date-time":"2025-05-28T06:30:26Z","timestamp":1748413826000},"page":"17","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Enhanced CO2 Sequestration in Recycled Aggregates: Exploring Novel Capture-Promoting Additives"],"prefix":"10.3390","volume":"3","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5644-9948","authenticated-orcid":false,"given":"David","family":"Bastos","sequence":"first","affiliation":[{"name":"c5Lab\u2014Sustainable Construction Materials Association, Edif\u00edcio Central Park, Rua Central Park 6, 2795-242 Linda-a-Velha, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6055-7917","authenticated-orcid":false,"given":"Ricardo","family":"Infante Gomes","sequence":"additional","affiliation":[{"name":"LNEC, National Laboratory for Civil Engineering, Av. do Brasil 101, 1700-066 Lisbon, Portugal"},{"name":"CERIS, Instituto Superior T\u00e9cnico, University of Lisbon, Av. Rovisco Pais 1, 1049-00 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4994-8639","authenticated-orcid":false,"given":"Diogo","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"CERENA, Chemical Engineering Department, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3445-9683","authenticated-orcid":false,"given":"Catarina","family":"Braz\u00e3o Farinha","sequence":"additional","affiliation":[{"name":"LNEC, National Laboratory for Civil Engineering, Av. do Brasil 101, 1700-066 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9869-7229","authenticated-orcid":false,"given":"Cinthia Maia","family":"Pederneiras","sequence":"additional","affiliation":[{"name":"LNEC, National Laboratory for Civil Engineering, Av. do Brasil 101, 1700-066 Lisbon, Portugal"},{"name":"CERIS, Instituto Superior T\u00e9cnico, University of Lisbon, Av. Rovisco Pais 1, 1049-00 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7135-8603","authenticated-orcid":false,"given":"Ros\u00e1rio","family":"Veiga","sequence":"additional","affiliation":[{"name":"LNEC, National Laboratory for Civil Engineering, Av. do Brasil 101, 1700-066 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8002-0682","authenticated-orcid":false,"given":"Ant\u00f3nio","family":"Santos Silva","sequence":"additional","affiliation":[{"name":"LNEC, National Laboratory for Civil Engineering, Av. do Brasil 101, 1700-066 Lisbon, Portugal"}]},{"given":"Jos\u00e9 Alexandre","family":"Bogas","sequence":"additional","affiliation":[{"name":"CERIS, Instituto Superior T\u00e9cnico, University of Lisbon, Av. Rovisco Pais 1, 1049-00 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6738-0672","authenticated-orcid":false,"given":"Rui","family":"Galhano dos Santos","sequence":"additional","affiliation":[{"name":"CERENA, Chemical Engineering Department, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2025,5,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"111668","DOI":"10.1016\/j.rser.2021.111668","article-title":"CO2 sequestration by construction and demolition waste aggregates and effect on mortars and concrete performance\u2014An overview","volume":"152","author":"Gomes","year":"2021","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_2","unstructured":"European Commission, IES Institute for Environment and Sustainability, European Commission, Joint Research Centre, and JRC-IES (2011). 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