977 resultados para Jacques-Cartier Bridge
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Collection : French books 1601-1700 ; 54.4-5
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Collection : French books 1601-1700 ; 54.4-5
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Collection : French books 1601-1700 ; 53.4
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Collection : French books 1601-1700 ; 53.5
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Collection : French books 1601-1700 ; 55.1
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O artigo comenta as experiências oceanográficas realizadas em Cabo Verde por Jacques-Yves Cousteau, Théodore Monod e Auguste Piccard no fim dos anos quarenta do século vinte. A recuperação da memória científica serve como base para uma reflexão sobre o carácter transdisciplinar da oceanografia e o seu interesse no contexto de Cabo Verde. Os autores fazem também uma breve descrição da zona onde decorreram os trabalhos, indicando quer alguns perigos ambientais, quer potencialidades para o turismo ecológico.
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The Iowa Method for bridge deck overlays has been very successful in Iowa since its adoption in the 1970s. This method involves removal of deteriorated portions of a bridge deck followed by placement of a layer of den (Type O) Portland Cement Concrete (PCC). The challenge encountered with this type of bridge deck overlay is that the PCC must be mixed on-site, brought to the placement area and placed with specialized equipment. This adds considerably to the cost and limits contractor selection. A previous study (TR-427) showed that a dense PCC with high-range water reducers could successfully be used for bridge deck overlays using conventional equipment and methods. This current study evaluated the use of high performance PCC in place of a dense PCC for work on county bridges. High performance PCC uses fly ash and slag to replace some of the cement in the mix. This results in a workable PCC mix that cures to form a very low permeability overlay.