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Title |
Experimental Study on Rheological Properties of Alkali Activated Slag Pastes with Water to Binder Ratio
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Authors |
김병조(Byeong-Jo Kim) ; 송진규(Jin-Kyu Song) ; 송금일(Keum-Il Song) ; 오명현(Myeong-Hyeon Oh) ; 이방연(Bang-Yeon Lee) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.5.511 |
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Keywords |
AAS 페이스트 ; 레올로지 ; 소성점도 ; 항복응력 alkali activated slag paste ; rheology ; plastic viscosity ; yield stress |
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Abstract |
Methods such table flow, slump and outflow time have used to be as a main evaluation criteria regards to fluidity of concrete. Since those methods mentioned above have some inaccuracies which are up to its condition of test. Studies that evaluate fluidity applying the rheology has increased its portion in this field. Meanwhile, demands for AAS binder have been increased in accordance with its demand for this market, studies for rheology of AAS binder are little though. Therefore, this paper mainly deals a rheological peculiarity of AAS binder according to its condition of W/B ratio and alkali activators. The fluidity of AAS paste was evaluated with the index of table flow and outflow time. And shear stress following its shear rate was analyzed through rheological test. Rheological parameters were deduced through this rheological test of Bingham model and analyzed its interrelation with fluidity test. As the final outcome, it proposed the interrelation among table flow, yield stress, viscosity and outflow time. In basis of this study, we would like to suggest a reference for mixing AAS mortars and concretes.
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