903 resultados para CEMENTO PORTLAND


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The suitability of Portland cement blends for encapsulation of Cs-Ionsiv in a monolithic wasteform was investigated. No evidence of reaction or dissolution of the Cs-Ionsiv in the cementitious environment was found by scanning electron microscopy and X-ray diffraction. However, a small fraction (≤1.6 wt%) of the Cs inventory was released from the encapsulated Ionsiv during leaching experiments carried out on hydrated samples. Cs release was enhanced by exchange of K and Na present in the cementitious pore water. Cement systems lower in K and Na, such as slag based blends, showed lower Cs release than the fly ash based analogues. © 2010 Materials Research Society.

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[Alumnus caption: "A Reunion of the Old Guard The Coach with Three Old Pupils, Donald W. Green, '11; M.E. Crumpacker, '09 W. D. Clark, '07]

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Urban Mass Transportation Administration, Washington, D.C.

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At head of title: War Department. Corps of Engineers, United States Army and United States Shipping Board ..

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"ERDC-CMB 05-021.".

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Federal Transit Administration, Washington, D.C.

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Copy of petition and decree of U.S. Circuit Court authorizing issue of $50,000 additional certificates by receiver.

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Brief in hearing on petition before Judge Walton for issue of $50,000 additional certificates of receiver.