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Aurel Gaba, Vasile Bratu, Dorian Musat, Ileana Nicoleta Popescu and Maria Cristiana Enescu
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Andrej Chríbik, Marián Polóni, Ján Lach, Ľubomír Jančošek, Peter Kunc and Josef Zbranek
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Džigita Nagrockienė, Aurelijus Daugėla, Laurynas Zarauskas and Gintautas Skripkiūnas
Cement as the binding agent in the production of concrete can be replaced with active mineral admixtures. Biofuel combustion fly ash is one of such admixtures. Materials used for the study include Portland cement CEM I 42.5 R, sand of 0/4 fraction, gravel of 4/16 fraction, biofuel fly ash, superplasticizer, and water. Six compositions of concrete were designed by replacing 0 %, 5 %, 10 %, 15 % 20 %, and 25 % of cement with biofuel fly ash. The article analyses the effect of biofuel fly ash content on the properties of concrete. The tests revealed that the increase of biofuel fly ash content up to 20 % increases concrete density and compressive strength after 7 and 28 days of curing and decreases water absorption, with corrected water content by using plasticizing admixture. It has been found that concrete where 20 % of cement is replaced by biofuel ash has higher frost resistance.
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M. Dzikuć and K. Łasiński
The paper presents the problem of excessive air pollution in Poland caused mainly by low emission. The emission arises in result of heating flats by means of old and energetically inefficient heating installations. In Poland and Bulgaria the inhaled air is of the worst quality out of all EU countries. The paper presents economic and technical problems related to low emission occurring during the combustion of solid fuels in local boiler houses. Furthermore, the most significant economic issues, connected with the reduction of low emission are discussed, as well as technological possibilities of efficient reduction of the amount of pollution in the atmosphere. Conclusions are presented at the end of the article.
R. Kłosowiak, J. Bartoszewicz and R. Urbaniak
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M. Dzikuć and K. Łasiński
-firing in new hard-coal power plants in Germany. - Biomass and Bioenergy, vol.57, pp.33-47. Łasiński K. (2012): Modern methods of quality control measurements by means of CCD cameras - a model selection. - International Journal of Applied Mechanics and Engineering, vol.17, No.3, pp.899-906. Nussbaumer T. (2003): Combustion and co-combustion of biomass: fundamentals, technologies, and primary measures for emission reduction. - Energy Fuels, vol.17, No.6, pp.1510-1521. PN-EN ISO 14040 (2009): Polish Committee for
Patricija Kara, Aleksandrs Korjakins and Valdemars Stokmanis-Blaus
European Cement Association, 2011.  WBCSD&IEA (World Business Council for Sustainable Development & International Energy Agency). Cement Technology Roadmap 2009: Carbon Emissions Reductions up to 2050 . Organisation for Economic Co-operation and Development, 2009.  Ramme B W, Tharaniyil M P. Coal Combustion Products Utilization Handbook: 2nd Edition , We Energies, 2004.  Naik T R, Kraus R N, Siddique R. Demonstration of Manufacturing Technology for Concrete and CLSM Utilizing Wood Ash From Wisconsin: Report
A. Deptuła and M.A. Partyka
-112.  Deptuła A. and Partyka M.A. (2014): Decision optimization of machine sets with taking into consideration logical tree minimization of design guidlines . – International Journal of Applied Mechanics and Engineering, vol.19, No.3, University Press Zielona Góra, pp.549-561.  Deptuła A., Osiński P. and Radziwanowska U. (2016): Decision support system for identifying technical condition of combustion engine . – Archives of Acoustics, vol.41, No.3, pp.449-460 [in print].  Deptuła A., Kunderman D., Osiński P., Radziwanowska U. and Włostowski R