@inproceedings{e0cae94d5cd5437aa3f25af565529155,
title = "The influence of cement paste volume in mortar on the rheological effects of the addition of superplasticizer",
abstract = "The results of investigation into the influence of polyether type superplasticizer addition on rheological parameters and its changes with time of different in cement paste volume fresh mortars are presented and discussed in the paper. Rheology results have been evaluated according to the Bingham model, which describes the rheology with the parameters: yield value and plastic viscosity. Rheological parameters were measured using Two-Point Workability Test. Because of the similar nature of rheological behaviour of fresh mortar and concrete, presented in paper relationships for mortars can be also used to state the rheological properties of fresh concrete. The obtained results show that the character and range of superplasticizer influence on rheological parameters of mortar is strongly influenced by cement paste volume. Volume of cement paste is also a significant factor affecting range and direction of changes of the rheological parameters of superplasticized mortars with time. The results show, that the character of influence of superplasticizer on rheological parameters of fresh cement paste and on fresh mortar may significantly differ each from other. These differences increase with decreasing volume of cement paste in mortar. On the ground of obtained results the empirical relations joining the rheological parameters of mortars with superplasticizer content were established. Analysis of results covers also comparison between influence of cement paste volume on rheology of mortars with and without superplasticizer. It is concluded that effects of superplasticizer addition on rheology of fresh mortar and concrete should be also considered in respect to cement paste volume. It is difficult to unequivocally predict effects of superplasticizer content on rheology of mortar or fresh concrete basing only on tests made on cement paste, and not making allowance on degree of aggregate filling by cement paste in this mortar or concrete.",
keywords = "High-range water reducers, Mortar, Rheology, Workability",
author = "Jacek Go{\l}aszewski",
year = "2006",
doi = "10.1533/9780857093080.441",
language = "English",
isbn = "9781845690311",
series = "Brittle Matrix Composites 8, BMC 2006",
publisher = "Woodhead Publishing Limited",
pages = "441--450",
booktitle = "Brittle Matrix Composites 8, BMC 2006",
note = "8th International Symposium on Brittle Matrix Composites 2006, BMC 2006 ; Conference date: 23-10-2006 Through 25-10-2006",
}