Search

The paper presents the results of research into the influence of calcareous fly ash (CFA) processing methods on the rheological properties of mortars. The study consisted of a comparison of changes of the rheological properties (plastic viscosity and yield value) of the mortars during 90 minutes when CFA, unprocessed or processed by grinding, grain separation, or selective collection from the filter, was used as a substitute for a part of the cement. The results show that processing of CFA decreases its negative influence on the rheological properties; the efficient methods are separation or grinding, while the effect of selective collection is almost insignificant. [ABSTRACT FROM AUTHOR]

An analysis of influence of different types of fibre and fibrecontent on properties of self-compacting concrete is the mainsubject of the paper. Presented study is focused on the effect ofsteel, basalt and polypropylene fibres with different geometricalparameters on workability and self-compacting abilities offresh mixes. [ABSTRACT FROM AUTHOR]