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The Fundamental Properties of Alkali-Activated Slag Cement (AASC) Mortar with Different Water-Binder Ratios and Fine Aggregate-Binder Ratios

물-결합재 비와 잔골재-결합재 비에 따른 알칼리 활성화 슬래그 모르타르의 기초특성

  • 김태완 (부산대학교 생산기술연구소) ;
  • 함형길 (부산대학교 토목공학과) ;
  • 이성행 (부산대학교 토목공학과) ;
  • 엄장섭 (창신대학교 토목공학과)
  • Received : 2013.03.13
  • Accepted : 2013.07.12
  • Published : 2013.09.30

Abstract

This study investigates the fundamental properties of the water-binder (W/B) ratio and fine aggregate-binder (F/B) ratio in the alkali-activated slag cement (AASC) mortar. The W/B ratios are 0.35, 0.40, 0.45, and 0.50, respectively. And then the F/B ratios varied between 1.00 and 3.00 at a constant increment of 0.25. The alkali activator was an 2M and 4M NaOH. The measured mechanical properties were compared, flow, compressive strength, absorption, ultra sonic velocity, and dry shrinkage. The flow, compressive strength, absorption, ultra sonic velocity and dry shrinkage decreased with increases W/B ratio. The compressive strength decreases with increase F/B ratio at same W/B ratio. Also, at certain value of F/B ratio significant increase in strength is observed. And S2 (river sand 2) had lower physical properties than S1 (river sand 1) due to the fineness modulus. The results of experiments indicated that the mechanical properties of AASC depended on the W/B ratio and F/B ratio. The optimum range for W/B ratios and F/B ratios of AASC is suggested that the F/B ratios by 1.75~2.50 at each W/B ratios. Moreover, the W/(B+F) ratios between 0.13 and 0.14 had a beneficial effect on the design of AASC mortar.

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  2. The Fundamental Study of Strength and Drying Shrinkage on Alkali-activated Slag Cement Mortar with Different Entering Point of Fine Aggregate vol.18, pp.2, 2014, https://doi.org/10.11112/jksmi.2014.18.2.117