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Title |
The Properties of Multi-Component Blended High Fluidity Mortar
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Authors |
김태완(Tae-Wan Kim) ; 강충현(Choonghyun Kang) ; 배주룡(Ju-Ryong Bae) ; 김인태(In-Tae Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2018.22.2.124 |
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Keywords |
고로슬래그 미분말(GGBFS) ; 칼슘설포알루미네이트(CSA) ; 초속경시멘트(URSC) ; 다성분계 Ground granulated blast furnace(GGBFS) ; Calcium sulfoaluminste(CSA) ; Ultra rapid setting cement(URSC) ; Multi-component blended |
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Abstract |
This research presents the results of an investigation on the characteristic of multi-component blended high fluidity mortars. The binder was blended ordinary Portland cement(OPC), ground granulated blast furnace slag(GGBFS), calcium sulfoaluminate(CSA) and ultra rapid setting cement(URSC). The GGBFS was replaced by OPC from 30%(P7 series), 50%(P5 series) and 70%(P3 series), CSA and URSC was 10% or 20% mass. The superplasticizer of polycarboxylate type were used. A constant water-to-binder ratio(w/b)=0.35 was used for all mixtures. Test were conducted for mini slump, setting time, V-funnel, compressive strength and drying shrinkage. According to the experimental results, the contents of superplasticizer, V-funnel and compressive strength increases with an increase in CSA or URSC contents for all mixtures. Moreover, the setting time and drying shrinkage ratio decrease with and increase in CSA or URSC. CSA decreased dry shrinkage but URSC had less effect. However, the mixed binders of CSA and URSC had a large effect of reducing drying shrinkage by complementary effect. This is effective for improving the initial strength of URSC, and CSA is effective for the expansion and improvement of long-term strength.
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