Influence of Portland Cement Replacement and Sand to Binder Ratio
on Slant Shear Strength between Concrete Substrate and Geopolymer
ประเภทบทความ :
บทความวิชาการ
หมวดหมู่ :
วิศวกรรมโยธา
This article presents the influence of both Portland cement replacement and sand to binder ratio (S/B) on
slant shear strength between concrete substrate and geopolymer mortar. Fly ash (FA) was replaced with Portland
cement (PC) at the dosages of 0, 5, 10 and 15% with various sand to binder ratios of 1.00, 1.25 and 1.50,
respectively. The alkali solution for used as liquid alkali were sodium silicate (Na2SiO3) and 10 molar sodium
hydroxide (NaOH) solutions. The Na2SiO3/NaOH ratio of 2.0 and the liquid/binder (L/B) ratio of 0.60 and cure at
ambient temperature were used in all mixture. Test results indicated that the slant shear strength between concrete
substrate and geopolymer mortar tends to increase with increase in PC replacement. While the S/B ratio increased,
the slant shear strength between concrete substrate and geopolymer mortar tends to increase. However at S/B ratio
of 1.50, the slant shear strength tends to decrease. The 15% PC replacement with S/B ratio of 1.00 gave the highest
slant shear strength between concrete substrate and geopolymer.
วันที่ลง01/07/2019
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