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http://dx.doi.org/10.14346/JKOSOS.2015.30.4.120

Durability of Alkali-Activated Blast Furnace Slag Concrete: Chloride Ions Diffusion  

Nam, Hong Ki (Department of Civil Engineering, Chungbuk National University)
Kyu, Park Jae (Department of Civil Engineering, Chungbuk National University)
San, Jung Kyu (Department of Civil Engineering, Chungbuk National University)
Hun, Han Sang (Department of Civil Engineering, Chungbuk National University)
Hyun, Kim Jae (Department of Civil Engineering, Chungbuk National University)
Publication Information
Journal of the Korean Society of Safety / v.30, no.4, 2015 , pp. 120-127 More about this Journal
Abstract
The aim of the present study is to investigate some characteristics of concrete according to addition of blast furnace slag and alkali-activator dosages. Blast furnace slag was used at 30%, 50% replacement by weight of cement, and liquid sulfur having NaOH additives was chosen as the alkaline activator. In order to evaluate characteristics of blast furnace slag concrete with sulfur alkali activators, compressive strength test, total porosity, chloride ions diffusion coefficient test were performed. The early-compressive strength characteristics of blast furnace slag concrete using a sulufr-alkali activators was compared with those of reference concrete and added 30, 50% blast furnace slag concrete. Also, Blast furnace slag concrete using sulfur-alkali activators enhanced the total porosity, chloride ions diffusion coefficient than two standard concrete. Alkali-activated blast furnace slag concrete was related to total porosity, compressive strength and chloride ions diffusion coefficient each others. As a result, it should be noted that the sulfur-alkali activators can not only solve the demerit of blast furnace slag concrete but also offer the chloride resistance of blast furnace slag concrete using sulfur alkali activators to normal concrete.
Keywords
chloride ions diffusion coefficient; total porosity; alkali-activator; blast furnace slag; concrete;
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