caa a22 4500 606170375 CHVBK 20210128100716.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s10098-015-0943-8 doi (NATIONALLICENCE)springer-10.1007/s10098-015-0943-8 Reservoir sediment as a secondary raw material in concrete production [Elektronische Daten] [Natalia Junakova, Jozef Junak, Magdalena Balintova] This paper summarizes the physical and chemical properties of sediments dredged from the small water reservoir Klusov (Slovakia) and their potential use as a secondary raw material in concrete production. The effects of the sediment addition on the concrete technological properties (compressive and flexural strength, freeze-thaw resistance) have been determined. Concrete specimens were pressed and cured for 2, 7, 28 and 365days. Results show that progress of compressive strength of concrete mixture, prepared from 20wt% natural aggregate replacement by coarse-grained sediments, was similar to the control concrete mixture. Specimens containing fine-grained sediment as a cement replacement, at a 40:60 sediment/cement weight ratio, achieved compressive strength values below 35% in comparison to that of the previous mixtures. The flexural strengths of concrete specimen prepared as a natural aggregate replacement were higher when compared to the reference mixture at all ages of hardening and have achieved a value of 6.59MPa after 365days of curing. Flexural strengths of the other samples were at about 4.0MPa. All tested concrete specimens resistant to freeze-thaw attack achieved frost resistance coefficient values above 0.85 according to the standard requirements. The weight loss values after 50 cycles of freeze-thaw testing were in range from 1.33 to 2.5% and hence the standard requirement of maximum 5% weight loss was also fulfilled. The results of the frost resistance coefficient and the weight loss after 50 cycles of freeze-thaw testing show that the tested concrete specimens meet the standard requirements for frost-resistant concrete class XF2. Springer-Verlag Berlin Heidelberg, 2015 Reservoir sediment nationallicence Concrete nationallicence Freeze-thaw testing nationallicence Flexural strength nationallicence Compressive strength nationallicence Junakova Natalia Faculty of Civil Engineering, Institute of Environmental Engineering, Technical University of Kosice, Vysokoskolska 4, 04200, Kosice, Slovakia aut Junak Jozef Faculty of Civil Engineering, Institute of Environmental Engineering, Technical University of Kosice, Vysokoskolska 4, 04200, Kosice, Slovakia aut Balintova Magdalena Faculty of Civil Engineering, Institute of Environmental Engineering, Technical University of Kosice, Vysokoskolska 4, 04200, Kosice, Slovakia aut Clean Technologies and Environmental Policy Springer Berlin Heidelberg 17/5(2015-06-01), 1161-1169 1618-954X 17:5<1161 2015 17 10098 https://doi.org/10.1007/s10098-015-0943-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10098-015-0943-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Junakova Natalia Faculty of Civil Engineering, Institute of Environmental Engineering, Technical University of Kosice, Vysokoskolska 4, 04200, Kosice, Slovakia aut NATIONALLICENCE 700 1- Junak Jozef Faculty of Civil Engineering, Institute of Environmental Engineering, Technical University of Kosice, Vysokoskolska 4, 04200, Kosice, Slovakia aut NATIONALLICENCE 700 1- Balintova Magdalena Faculty of Civil Engineering, Institute of Environmental Engineering, Technical University of Kosice, Vysokoskolska 4, 04200, Kosice, Slovakia aut NATIONALLICENCE 773 0- Clean Technologies and Environmental Policy Springer Berlin Heidelberg 17/5(2015-06-01), 1161-1169 1618-954X 17:5<1161 2015 17 10098