The impact of the addition of diabase dusts on the properties of cement pavement concrete
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Faculty of Civil Engineering and Geodesy, Military University of Technology in Warsaw, ul. Gen. S. Kaliskiego 2, 01-476 Warsaw, Poland
Faculty of Civil and Environmental Engineering, West Pomeranian University of Technology in Szczecin, al. Piastów 50a, 70-311 Szczecin, Poland
Submission date: 2021-06-12
Final revision date: 2021-10-04
Acceptance date: 2021-10-05
Publication date: 2022-03-30
Archives of Civil Engineering 2022;68(1):395-411
The aim of the paper was to analyse the possibility to use waste material which is created during the production of mineral-asphalt mixes as a side effect of the process of drying and dedusting diabase aggregate in high temperature. Experimental studies included the analysis of the influence of the addition of diabase dust on the improvement of the properties of cement concrete destined for the construction of local roads. The mineral additive in the form of diabase dust, which constitutes natural waste, was inserted into the concrete mix as a mineral additive substituting a part of the aggregate with the constant amount of cement and water, and additionally as the substitute for cement. The performed studies resulted in the conclusion that adding diabase dust significantly increased the tightness and density of concrete, which impacts the increase of compressive strength by 7, 21 and 28% in reference to model concrete. The insertion of the waste diabase dust into the concrete mix significantly improved the freeze-thaw resistance of concrete after 150 cycles of testing and reduced the water absorption by 6, 15 and 21%. Using diabase dust as a substitute in the following amount: 50, 100 and 150 kg/m3 did not cause significant changes in the scope of density and water absorption, whereas the reduction of the compressive strength was from 8, 23 and 33% in reference to the model concrete. The application of dust as the substitute for cement resulted in the reduction of the costs of concrete by 6, 12 and 18% and resulted in the possibility to fully apply waste material, which confirms the justness of undertaking implementation research. Concrete with the use of waste rock dusts may be qualified as concrete that is environmentally friendly and compliant with the sustainable development of modern construction materials.
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