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Vodní součinitel ovlivňuje pórovou strukturu cementového tmelu v betonu, která pak ovlivňuje beton z hlediska mechanických vlastností a chování při zahřívání. V experimentu byl sledován vliv vodního součinitele v/c = 0,3, 0,4, 0,5 a 0,6 na distribuci a množství pórů v cementovém tmelu a na pevnost v tlaku betonu. Beton byl vyroben ze směsí, u nichž bylo zachováno množství kameniva, čerstvý beton měl...
The paper introduces the issues ofconcrete shrinkage. Changes occurring in the concrete mix have been discussed, as well "as methods of research and partial results obtained by the authors. All presented results have been achieved with the following tests using the SMF superplasticizer (sulphonated melamine-formaldehyde condensate). The total extent of shrinkage is influenced by a variety of...
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