Rheologie von Frischem Mörtel und Frischen Betonmischungen

The test results presented constitute an experimental evidence of presented in Table 1, compatibility of the nature of impact of basic factors of composition on rheological parameters of fresh mortars and concretes. Thus proves that results obtained with mortars may be used for predicting trends of changes in rheological behavior of fresh concrete. This applies especially to testing rheological effects of mineral additions and chemical admixtures and compatibility of cement and superplasticizer. Correlation between rheological parameters of fresh mortar and fresh concrete, which can be expressed in form simple mathematic relations as it is presented in this paper, proves that designing, optimizing, controlling and correcting workability of fresh concrete may be performed basing on measurements of rheological parameters of the mortar. However presented research was performed in relatively narrow range. Thus further tests are necessary, run in a wider range, comprising mortars and mixtures of different proportions of constituents, of different rheological characteristics, as well as of aggregates different in type and grading.