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[56430] Artykuł: SCALING RESISTANCE AND AIR VOID CHARACTERISTICS IN CONCRETE CONTAINING GGBSCzasopismo: Archives of Civil Engineering Tom: Volume LXII, Zeszyt: 4/2016, Strony: 181-189ISSN: 1230-2945 Wydawca: POLISH ACAD SCIENCES INST FUNDAMENTAL TECHNOLOGICAL RESEARCH, PAWINSKIEGO 5B, 02-106 WARSAW, POLAND Opublikowano: 2016 Autorzy / Redaktorzy / Twórcy Grupa MNiSW: Publikacja w recenzowanym czasopiśmie wymienionym w wykazie ministra MNiSzW (część B) Punkty MNiSW: 15 Klasyfikacja Web of Science: Article DOI Web of Science Keywords: scaling resistance  air entrainment  ggbs  air pore system   |
In this paper we discuss the test results for concretes containing various amounts of ggbs as compared to concretes made with Portland cement. The main objective of these tests is to evaluate the influence of varying air content in such mixtures on the structure and frost resistance of concrete. The authors suggest that the approach presented here allows for a safe design of concrete mixtures in terms of their frost resistance.
The results indicate that concrete can be resistant to surface scaling even at the W/C ratio markedly higher than 0.45. Increased addition of ggbs leads to a decrease in concrete resistance to surface scaling. Proper air entrainment is the fundamental factor for frost-resistant concrete, and the air void system has to be assessed (micropore content A(300), spacing factor (L) over bar). The addition of ggbs increases pore diameters, thus, to obtain the appropriate air pore spacing factor, micropore quantities introduced have to be increased.