Ageing of old and modern concrete structures – Observations and research
Abstract
Ageing of old and modern concrete structures – Observations and research
ABSTRACT
Ageing is an inherent feature of nature. Yet it seems to be a rather new topic in both science and engineering. The main reason for increasing attention for ageing as a topic is the growing awareness that, particularly in industrialized countries, ageing of our assets is a financial burden for the society and affects the overall sustainability of our planet. In this contribution, the urgency and challenges of ageing of concrete structures are addressed. The complexity of ageing problems will be illustrated by looking in more detail to the evolution in concrete mix design and the consequences thereof for the long-term performance of concrete structures. Emphasis will be on ageing of concrete infrastructure and justification of research on ageing phenomena.
Keywords:Â infrastructure; sustainability; ageing; mix design; autogenous shrinkage; codes.
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Envejecimiento de antiguas y modernas estructuras de concreto - Observaciones e investigaciones
RESUMEN
El envejecimiento es una caracterÃstica inherente de la naturaleza. Sin embargo, parece ser un tema bastante nuevo en la ciencia y la ingenierÃa. La principal razón para aumentar la atención por el envejecimiento como tema es la creciente conciencia de que, en particular en los paÃses industrializados, el envejecimiento de nuestros activos es una carga financiera para la sociedad y afecta la sostenibilidad global de nuestro planeta. En esta contribución se abordan la urgencia y los desafÃos del envejecimiento de las estructuras de concreto. La complejidad de los problemas de envejecimiento se ilustra examinando con más detalle la evolución del diseño de la mezcla de concreto y sus consecuencias para el rendimiento a largo plazo de las estructuras de concreto. Se hace hincapié en el envejecimiento de las infraestructuras de concreto y en la justificación de la investigación sobre fenómenos de envejecimiento.
Palabras clave: infraestructura; sostenibilidad; envejecimiento; mezcla de diseño; contracción autógena; códigos.
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Envelhecimento estruturas de betão antigos e modernos - Observações e pesquisa
RESUMO
O envelhecimento é uma caracterÃstica inerente à natureza. No entanto, parece ser um bastante novo tópico em ciência e engenharia. A principal razão para uma maior atenção por tema envelhecimento é a consciência crescente de que, particularmente nos paÃses industrializados, o envelhecimento dos nossos ativos é um encargo financeiro para a sociedade e afeta a sustentabilidade global do nosso planeta. Nesta contribuição a urgência e os desafios de estruturas de concreto envelhecimento são abordados. A complexidade dos problemas de envelhecimento está ilustrada em mais pormenor através da análise da evolução do desenho da mistura de betão e o seu impacto sobre o desempenho a longo prazo das estruturas de betão. A ênfase é colocada na infra-estrutura de envelhecimento do concreto e justificação da pesquisa sobre os fenómenos de envelhecimento.
Palavras-chave: infra-estrutura; sustentabilidade; envelhecimento; misture projeto; retração autógena; códigos.
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References
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