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Title |
The Engineering Properties of High Fluidity mortar with High Volume Slag Cement
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Authors |
배주룡(Ju-Ryong Bae) ; 김태완(Tae-Wan Kim) ; 김인태(In-Tae Kim) ; 김민정(Min-Jeong Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.5.012 |
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Keywords |
고유동 모르타르 ; 대량치환슬래그 시멘트 ; 칼슘설포알루미네이트(CSA) ; 규산나트륨 High fluidity mortar ; High volume slag cement ; Calcium sulfoaluminate(CSA) ; Sodium silicate |
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Abstract |
This report presents the results of an investigation on the fundamental properties of mortars high fluidity high volume slag cement(HVSC) activated with sodium silicate(Na2SiO3). The ordinary Portland cement(OPC) was replaced by ground granulated blast furnace slag(GGBFS) from 40% to 80% and calcium sulfoaluminate(CSA) was 2.5% or 5.0% mass. The Na2SiO3 was added at 2% and 4% by total binder(OPC+GGBFS+CSA) weight. A constant water-to-binder ratio(w/b)=0.35 was used for all mixtures. The research carried out the mini slump, V-funnel, setting time, compressive strength and drying shrinkage. The experimental results showed that the contents of superplasticizer, V-funnel, setting time and drying shrinkage increased as the contents of CSA and Na2SiO3 increase. The compressive strength increases with and an increase in CSA and Na2SiO3. One of the major reason for these results is the accelerated reactivity of GGBFS with CSA and Na2SiO3. The maximum performance was CSA 5.0% + Na2SiO3 4% specimens.
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