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Civil Engineering, Faculty of Architecture, Civil Engineering and Geodesy, University of Banja Luka , Banjaluka , Bosnia and Herzegovina
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Civil Engineering, Faculty of Architecture, Civil Engineering and Geodesy, University of Banja Luka , Banjaluka , Bosnia and Herzegovina
Civil Engineering, Faculty of Architecture, Civil Engineering and Geodesy, University of Banja Luka , Banjaluka , Bosnia and Herzegovina
Civil Engineering and Geodesy, Faculty of Technical Sciences, University of Novi Sad , Novi Sad , Serbia
Civil Engineering and Geodesy, Faculty of Technical Sciences, University of Novi Sad , Novi Sad , Serbia
Civil Engineering and Geodesy, Faculty of Technical Sciences, University of Novi Sad , Novi Sad , Serbia
Civil Engineering and Geodesy, Faculty of Technical Sciences, University of Novi Sad , Novi Sad , Serbia
Civil Engineering, Faculty of Architecture, Civil Engineering and Geodesy, University of Banja Luka , Banja Luka , Bosnia and Herzegovina
Civil Engineering, Faculty of Civil Engineering, University of Beograd , Beograd , Serbia
Civil Engineering, Faculty of Architecture, Civil Engineering and Geodesy, University of Banja Luka , Banja Luka , Bosnia and Herzegovina
Civil Engineering , Faculty of Architecture, Civil Engineering and Geodesy, University of Banja Luka , Banja Luka , Bosnia and Herzegovina
The paper presents the results of our own experimental research on the effect of the high range water reducing admixture content – HRWRA (applied in the range from 0.8 to 1.2% by mass of cement – mc) on the properties of self-compacting concrete in the fresh and hardened state.
The research showed that increasing the HRWRA content leads to the entrapped porosity reduction – up to 44%, increase of flowability – up to 13%, reduction of viscosity – up to 31%, improvement of passing ability – up to 15% and degradation of sieve segregation resistance of concrete in fresh state – up to 60%. The beneficial effect of the increase in HRWRA was shown on the analysed properties in the hardened state: compressive strength at the age of 28 days – up to 13%, water absorption – up to 61% and freeze/thaw resistance – up to 10%. The difference in the participation of HRWRA from 0.8 to 1.2% mc does not have a statistically significant effect on the density and freeze/thaw resistance with a de-icing agent.
high range water reducing admixture, self-compacting concrete, durability, experimental research
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