{"corpus_id":283823820,"paper_sha":"7b0f67477cabe623fbb2b56b000c8cf0eadff104","doi":"10.5216/reec.v20i1.80502","arxiv_id":null,"pmid":null,"pmcid":null,"mag_id":null,"dblp_id":null,"acl_id":null,"title":"INDICADORES DE RESISTÊNCIA À CARBONATAÇÃO EM CONCRETOS COM MATERIAIS CIMENTÍCIOS SUPLEMENTARES","year":2024,"publication_date":"2024-09-16","venue":"REEC: Revista Eletrônica de Engenharia Civil","journal":{"name":"REEC - Revista Eletrônica de Engenharia Civil","pages":null,"volume":null},"journal_issn":null,"journal_title":null,"publication_types":["JournalArticle"],"pubmed_pub_types":null,"s2_fields_of_study":[],"reference_count":1,"citation_count":0,"influential_citation_count":0,"is_open_access":false,"arxiv_categories":null,"arxiv_license":null,"arxiv_journal_ref":null,"mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":1,"s2_open_access_pdf_url":null,"s2_open_access_landing_url":null,"s2_open_access_license":null,"s2_open_access_status":null,"pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"RESUMO:  Concretos produzidos com a substituição parcial do cimento Portland por materiais cimentícios suplementares (SCM’s) são comuns, e garantem benefícios econômicos, sustentáveis e de elevar o desempenho e durabilidade dos concretos. Entretanto a substituição de clínquer por outro tipo de material reduz a reserva alcalina do sistema, o que é um agravante para concretos armados, pois a alta alcalinidade do meio garante a formação de uma camada passivadora em torno do aço impedindo o início do processo de corrosão. O conhecimento dos mecanismos de carbonatação em sistemas compostos é imprescindível na dosagem do concreto, onde se escolhe o SCM mais adequado e seu teor de substituição. O presente trabalho pondera a necessidade de se fazer um balanço entre o prejuízo causado à barreira química pela redução da reserva alcalina, e o benefício à barreira física através da redução da porosidade, ocasionados pelos SCM’s, para se garantir a boa durabilidade de concretos sujeitos a carbonatação e propõe a utilização de um indicador de resistência à carbonatação em função dos teores de cálcio e sílica presentes nos materiais.","claims":[{"public_id":"cl_b4f29e6892a3dfa69a86feca88a44f46","status":"active","text":"A carbonation resistance indicator based on calcium and silica contents of the constituent materials is proposed to guide selection of SCM type and substitution level for reinforced concrete subject to carbonation.","confidence":0.92,"contributors":[{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["extraction"],"url":"https://sah.borca.ai/u/322360f1c1"},{"id":2,"public_id":"4715169a40","public_label":"AK 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