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Title |
The Fundamental Study of Strength and Drying Shrinkage on Alkali-activated Slag Cement Mortar with Different Entering Point of Fine Aggregate
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Keywords |
알칼리 활성화 슬래그 시멘트 모르타르 ; 잔골재 ; 투입시점 Alkali-activated slag cement mortar ; Fine aggregate ; Entering point |
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Abstract |
This paper examines the fundamental properties of alkali-activated slag cement (AASC) activated by sodium hydroxide (NaOH). The water to binder (W/B) ratio was 0.4 and 0.5. And concentration of activator were 2M and 4M. Five mix design of each W/B ratios was considered. The N0 mixture was KS L 5109 method and N1~N4 were varied in different mixing time, mix step and entering points of fine aggregate. Test results clearly showed that the flow value, strength and drying shrinkage development of AASC were significantly dependent on the entering point of fine aggregate. The flow value tended to decreases with delaying entering point of fine aggregate. The compressive strength and flexural strength increases with delaying entering point. Moreover, the XRD analysis confirmed that there were sustain these results. The drying shrinkage increases with delaying entering point of fine aggregate. Futhermore, a modified mixing method incorporating all hereby experimentally derived parameters, is proposed to improvement the physical properties of AASC.
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