Open AccessHPC cement materials prepared by mixing under reduced pressure
Author(s) -
J Vojtisek,
Radoslav Novotný,
Eva Bartoníčková,
Petr Hrubý,
Michal Marko,
Martin Janča
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1039/1/012010
Subject(s) - porosity , mixing (physics) , materials science , microstructure , cement , composite material , durability , limiting , atmospheric pressure , composite number , porous medium , mechanical engineering , meteorology , physics , quantum mechanics , engineering
This article deals with HPC (High Performance composite) materials whose main advantages are increased mechanical properties, durability and stability. The limiting parameter for such materials is the presence of air bubbles that cannot be removed just by the compacting. Mixing of cement mixtures under reduced pressure can be used to reduce porosity and eliminate the presence of air bubbles. Moreover, it is associated by the improvement of the mechanical properties. The influence of preparation of HPC by mixing under the atmospheric pressure and by mixing under reduced pressure to parameters like mechanical properties, porosity, microstructure was studied in this paper. The porosity of the samples was analysed in a cross-section using an optical method. The effect of the reduced pressure on the resulting strength of the samples was observed.