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Sulfate Resistance of Alkali-Activated Materials Mortar
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 Title & Authors
Sulfate Resistance of Alkali-Activated Materials Mortar
Park, Kwang-Min; Cho, Young-Keun; Lee, Bong-Chun;
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 Abstract
This paper presents an investigation into the durability alkali-activated materials(AAM) mortar and paste samples manufactured using fly-ash(FA) and ground granulated blast furnace slag(GGBFS) exposed to a sulfate environment with different GGBFS replace ratios(0, 30, 50 and 100%), sodium silicate modules( 1.0, 1.5 and 2.0) and initial curing temperatures( and ). The tests involved immersions for a period of 6 months into 10% solutions of sodium sulfate and magnesium sulfate. The evolution of compressive strength, weight, length expansion and microstructural observation such as x-ray diffraction were studied. As a results, as higher GGBFS replace ratio or Ms shown higher compressive strengths on 28 days. In case of immersed in 10% sodium sulfate solution, the samples shows increase in long-term strength. However, for samples immersed in magnesium sulfate solutions, the general observation was that the compressive strength decreased after immersion. The most drastic reduction of compressive strength and expansion of weight and length occurred when GGBFS or Ms ratios were higher. Also, the XRD analysis of samples immersed in magnesium sulfate indicated that expansion of AAM caused by gypsum(); the gypsum increased up to 6 months continuously.
 Keywords
Alkali-Activated Materials;Geopolymer;Sulfate Attack;Magnesium Sulfate;Sodium Sulfate;
 Language
Korean
 Cited by
1.
알칼리 활성 슬래그 기반 무시멘트 콘크리트의 장기 내구성 평가,이현진;이석진;배수호;권순오;이광명;정상화;

한국건설순환자원학회논문집, 2016. vol.4. 2, pp.149-156 crossref(new window)
2.
알칼리 활성화 결합재 모르타르의 황산염 침식 저항성에 미치는 마그네슘 및 황산 이온의 영향,박광민;조영근;신동철;

한국콘크리트학회논문집, 2017. vol.29. 4, pp.415-424 crossref(new window)
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