1243 KB40 KB195120262024Kryžanowski, Andrejštevilka:letn. 73str. 114-122ISSN:0017-2774COBISSID_HOST:200346371URN:URN:NBN:SI:doc-A47ELS39slMatična sekcija gradbenih inženirjev Inženirske zbornice SlovenijeZveza društev gradbenih inženirjev in tehnikov SlovenijeGradbeni vestnikabrasionabrasion resistanceabrazijaabrazijska odpornostbetoniconcretehydraulic structuresvodne zgradbeAbrazijska odpornost betonov na vodnih zgradbah| Abrasion resistance of concrete on hydraulic structures|The paper deals with the issues of concrete resistance to long-term abrasion loading caused by waterborne particles. The purpose of the research work is to define the criteria for the design of abrasion-resistant concrete linings for the proposed hydro power plants on the Sava River. The abrasion resistance of concrete was investigated in accordance with the standard ASTM C 1138 method. The research work was based on a comparison between laboratory results and measurements of the abrasion resistance of concrete under natural conditions by performing test plots in the stilling basin of the Vrhovo HPP. Concrete composites with different mechanical properties were analysed within the research programme. The basic composition of the concretes, which is the same as that of the spillway of the Vrhovo HPP, was modified by polymer or pozzolanic additives, as well as by the primary binder, steel fibers, polypropylene fibers and granular rubber. The analysis showed a qualitative similarity of the level of abrasion of concrete between laboratory simulations and field measurements, as well as suitability of the ASTM C 1138 laboratory method for assessing the abrasion resistance of concretes in the spillway of the HPP chain on the Lower Sava RiverV članku smo analizirali pojav abrazijske erozije betonov na vodnih zgradbah, ki je posledica abrazijskega delovanja z vodnim tokom rinjenih plavin. Detajlno nas je zanimala ustreznost metode za ugotavljanje stopnje abrazijske erozije betonov na vodnih zgradbah po standardu ASTM C 1138. To smo ocenili s primerjavo med laboratorijskimi rezultati in meritvami abrazijske odpornosti betona v naravi z izvedbo preskusnih polj v podslapju HE Vrhovo. Ustreznost metode smo analizirali za betone, ki so bili vgrajeni na evakuacijskih objektih hidroelektrarn na spodnji Savi. Pri tem smo osnovne sestave betonov modificirali z dodatki primarnega veziva, jeklenih in polipropilenskih vlaken ter z gumenim agregatom. Analiza je pokazala kvalitativno podobnost stopnje abrazijske erozije betonov med laboratorijskimi meritvami in meritvami v naravi. Kvantitativna primerjava rezultatov pa je pokazala dobro korelacijo med laboratorijskimi meritvami in meritvami v naravi kakor tudi primernost laboratorijske metode po standardu ASTM C 1138 za oceno odpornosti betonov proti obrabi na prelivih verige HE na spodnji SaviTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaZveza društev gradbenih inženirjev in tehnikov Slovenije