{"id":716,"date":"2023-12-18T17:28:53","date_gmt":"2023-12-18T17:28:53","guid":{"rendered":"https:\/\/site.ibracon.org.br\/Site_revista\/Concreto_Construcoes\/Concreto_blog\/?p=716"},"modified":"2025-07-31T02:06:04","modified_gmt":"2025-07-31T02:06:04","slug":"concreto-alto-modulo","status":"publish","type":"post","link":"https:\/\/site.ibracon.org.br\/Site_revista\/Concreto_Construcoes\/Concreto_blog\/press-releases\/concreto-alto-modulo\/","title":{"rendered":"Concreto de alto m\u00f3dulo de elasticidade nas bases pr\u00e9-fabricadas do acelerador Sirius<\/strong>"},"content":{"rendered":"\n

Um dos maiores desafios da gera\u00e7\u00e3o da luz s\u00edncrotron \u00e9 a estabilidade. O feixe de el\u00e9trons que permanece girando dentro do anel de armazenamento em velocidade pr\u00f3xima \u00e0 da luz precisa manter sua velocidade e trajet\u00f3ria para gerar uma radia\u00e7\u00e3o capaz de penetrar as estruturas mais rec\u00f4nditas do mundo microsc\u00f3pico.<\/p>\n\n\n\n

Esta estabilidade foi garantida por um conjunto de eletro\u00edm\u00e3s fixados em bases de concreto, com exig\u00eancias dimensionais restritivas e com elevada rigidez capaz de mitigar a propaga\u00e7\u00e3o de resson\u00e2ncias mec\u00e2nicas.<\/p>\n\n\n\n

Este foi o desafio singular e in\u00e9dito imposto aos engenheiros brasileiros no projeto e constru\u00e7\u00e3o do Laborat\u00f3rio Nacional de Luz S\u00edncrotron \u2013 Sirius<\/a>, uma moderna infraestrutura cient\u00edfica instalada no Centro Nacional de Pesquisa em Energia e Materiais \u2013 CNPEM, em Campinas, S\u00e3o Paulo.<\/p>\n\n\n\n

\"\"
LNLS – Sirius, em Campinas<\/figcaption><\/figure>\n\n\n\n

A \u00e1rea onde o pr\u00e9dio foi constru\u00eddo passou por diversos estudos de subsolo, an\u00e1lises e prot\u00f3tipos das funda\u00e7\u00f5es, pisos e estrutura.<\/p>\n\n\n\n

As bases de fixa\u00e7\u00e3o dos \u00edm\u00e3s e dos equipamentos do LNLS s\u00e3o de concreto pr\u00e9-fabricado, com alto m\u00f3dulo de elasticidade. O m\u00f3dulo de elasticidade \u00e9 uma propriedade dos materiais que correlaciona a tens\u00e3o aplicada e a deforma\u00e7\u00e3o provocada num corpo de prova feito com determinado material. Quanto maior o m\u00f3dulo de elasticidade do concreto, maior deve ser a tens\u00e3o aplicada sobre a pe\u00e7a de concreto para uma certa deforma\u00e7\u00e3o.<\/p>\n\n\n\n

\"\"
Base de concreto pr\u00e9-fabricado com eletro\u00edmas fixados<\/figcaption><\/figure>\n\n\n\n

No caso do concreto pr\u00e9-fabricado usado nas bases, a dosagem buscou o empacotamento dos agregados mi\u00fados e gra\u00fados e a redu\u00e7\u00e3o dos volumes de \u00e1gua e de pasta, o que propiciou obter um concreto autoadens\u00e1vel com m\u00f3dulo de elasticidade de aproximadamente 60 GPa e uma resist\u00eancia \u00e0 compress\u00e3o acima de 100 MPa.<\/p>\n\n\n\n

J\u00e1, a toler\u00e2ncia dimensional de 2 mm em todas as dire\u00e7\u00f5es exigiu a montagem de f\u00f4rmas met\u00e1licas com alinhamento e planicidade verificados por laser scanner e a inspe\u00e7\u00e3o de todas as pe\u00e7as por meio de leitura tridimensional com laser track, controles desenvolvidos pelo ind\u00fastria de pr\u00e9-fabricados.<\/p>\n\n\n\n

O projeto e constru\u00e7\u00e3o do Sirius induziu n\u00edvel in\u00e9dito de qualidade e precis\u00e3o em elementos pr\u00e9-fabricados no Brasil, e foi oportunidade para se alcan\u00e7ar novo patamar de inova\u00e7\u00e3o tecnol\u00f3gica na ind\u00fastria nacional da constru\u00e7\u00e3o.<\/p>\n\n\n\n

Quer conhecer como o concreto autoadens\u00e1vel pr\u00e9-fabricado de alto m\u00f3dulo de elasticidade das bases do Sirius foi produzido e controlado? Leia o artigo Desafios da produ\u00e7\u00e3o das bases pr\u00e9-fabricadas em concreto de elevado m\u00f3dulo de elasticidade do acelerador Sirius<\/em> \u2013 CNPEM<\/a>, na edi\u00e7\u00e3o 112 da Revista CONCRETO & Constru\u00e7\u00f5es.<\/p>\n","protected":false},"excerpt":{"rendered":"

Desafio foi obter um concreto de alto m\u00f3dulo de elasticidade para estabilidade das bases do Laborat\u00f3rio Nacional de Luz S\u00edncrotron<\/p>\n","protected":false},"author":2,"featured_media":719,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4],"tags":[151,150,149],"class_list":["post-716","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-press-releases","tag-concreto-autoadensavel","tag-concreto-pre-fabricado","tag-modulo-de-elasticidade"],"acf":[],"yoast_head":"\nConcreto de alto m\u00f3dulo de elasticidade nas bases pr\u00e9-fabricadas do acelerador Sirius - Blog CONCRETO & Constru\u00e7\u00f5es<\/title>\n<meta name=\"description\" content=\"Projeto S\u00edrius fez uso de concreto autoadens\u00e1vel pr\u00e9-fabricado de alto m\u00f3dulo de elasticidade, que garantia estabilidade\" \/>\n<meta name=\"robots\" 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