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Estudo experimental sobre betão auto-adensável
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ISBN10: 6207668669
ISBN13: 9786207668663
Publisher: Edicoes Nosso Conhecimento
Published: Jun 16 2024
Pages: 60
Weight: 0.22
Height: 0.14 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786207668663
Publisher: Edicoes Nosso Conhecimento
Published: Jun 16 2024
Pages: 60
Weight: 0.22
Height: 0.14 Width: 6.00 Depth: 9.00
Language: Portuguese
O CAA é um tipo de concreto de alta fluidez sem vibração, também conhecido como Concreto Autoadensável e Concreto de Alto Desempenho, que foi descoberto pela Universidade de Tóquio, no Japão, na década de 1980. O SCC geralmente usa um grande número de aditivos minerais e aditivos quÃmicos para atingir um estado denso sem vibração sob a ação de sua própria gravidade e, em seguida, preenche a fôrma com barras de aço densas. O SCC possui caracterÃsticas de resistência à segregação, fácil enchimento, fácil passagem, alta fluidez e alta capacidade de deformação, podendo manter a homogeneidade durante e após o transporte e vazamento. Devido ao menor número de defeitos na microestrutura, o CCA pode atender aos requisitos de resistência, estabilidade de volume e durabilidade do concreto (Wu et al., 2015). Devido ao seu alto desempenho de trabalho, o CCA é mais adequado para o vazamento de concreto em massa. Para manter a deformabilidade e coesão do concreto, geralmente é utilizado em scc com superplastificante, grande quantidade de pó reativo e melhorador de viscosidade (Prakash et al., 2021). Devido ao uso de maior teor de pó no concreto, há mais poros pequenos e menos água disponÃvel no concreto (Zhang et al., 2003).
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