1000 resultados para Christophe, Eugène (1885-1970)
Resumo:
The large volume of traffic on the interstate system makes it difficult to make pavement repairs. The maintenance crew needs 4-5 hours to break out the concrete to be replaced and prepare the hole for placing new concrete. Because of this it is usually noon before the patch can be placed. Since it is desirable to remove the barricades before dark there are only 7-8 hours for the concrete to reach the required strength. There exists a need for a concrete that can reach the necessary strength (modulus of rupture = 500 psi) in 7-8 hours. The purpose of this study is to determine if type III cement and/or an accelerator can be used in an M-4 mix to yield a fast setting patch with very little shrinkage. It is recognized that calcium chloride is a corrosive material and may therefore have detrimental effects upon the reinforcing steel. The study of these effects, however, is beyond the scope of this investigation.
Resumo:
This book, published jointly by the American Society of Agronomy, Soil Science Society of American and Iowa State University presents the papers that were given at a symposium held in Ames, Iowa, on Nov. 30 and Dec. 1, 1965 on the general topic of plant environment and efficient water use.
Resumo:
Presentació de llibre editat pel Centre Dona i Literatura
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This bibliography was prepared through the cooperation of the executive board of the Iowa Association of School Librarians in hope that the books and pamphlets listed will supplement and enrich the material available in school libraries.
Resumo:
Abstract: From a political science of regions to conflict regulation theory. The study of radicalism in Finnish political science from the 1950s to the 1970s
