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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.80 No.2
- 발행연도
- 2021.10
- 수록면
- 181 - 199 (19page)
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초록· 키워드
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Heavyweight geopolymer concrete (HWGC) is a new concrete type that combines the benefits of geopolymer concrete (GC) and heavyweight concrete. HWGC can be used to produce particular properties such as high radiation shielding, and mass concrete elements. HWGC based on fly ash and ground granulated blast furnace slag, using electric arc furnace steel slag (EAFSS), barite and ilmenite coarse aggregates can substantially have higher specific gravities than concrete made with crushed dolomite. In the experimental work carried out on four main groups, 13 GC mixes are prepared by using heavyweight coarse aggregates (HWCAs) at volume ratios of 0%, 25%, 50%, 75% and 100%. Fresh and mechanical properties, compressive and tensile strengths, and influence of high temperature on radiation are investigated for specimens subjected to high temperatures of up to 900°C for 1, 2 and 3 hours. Moreover, the internal structure of geopolymer is analyzed using scanning electron microscope and energy-dispersive X-ray. Results show a good effect of HWCAs on the properties, radiation shielding and unit weight. The density of heavyweight geopolymer mixes ranges between 2,415 and 3,480 kg/m3, and HWCA ratios contribute to an increase in all properties of GC mixtures using up to 75% of NWCAs. Heavier coarse aggregate of ilmenite dampens the effect of higher temperatures on GC strength compared with lighter aggregates. In addition, replacing crushed dolomite with heavyweight aggregates of EAFSS, barite and ilmenite increases the attenuation rate to 27%, 21% and 13%, respectively. This finding confirms that the type of aggregate used in the production of GC is important for reducing the permeability of X-ray.
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참고문헌 (84)
참고문헌 신청
Abdullah, M. / 2011 / The relationship of NaOH molarity, Na2SiO3/NaOH ratio, fly ash/alkaline activator ratio, and curing temperature to the strength of fly ash-based geopolymer / Adv. Mater. Res 328:1475~1482
Alaloul, W. S. / 2021 / Chemical attack on concrete containing a high volume of crumb rubber as a partial replacement to fine aggregate in engineered cementitious composite (ECC) / Can. J. Civil Eng
Amin, M. / 2020 / Effect of using mineral admixtures and ceramic wastes as coarse aggregates on properties of ultrahigh-performance concrete / J. Clean. Prod 273:123073
Amin, M. / 2021 / Effects of nano cotton stalk and palm leaf ashes on ultrahighperformance concrete properties incorporating recycled concrete aggregates / Constr. Build. Mater 302:124196
Amin, M. / 2021 / Engineering properties of self-cured normal and high strength concrete produced using polyethylene glycol and porous ceramic waste as coarse aggregate / Constr. Build. Mater 299:124243
Alaloul, W. S. / 2021 / Chemical attack on concrete containing a high volume of crumb rubber as a partial replacement to fine aggregate in engineered cementitious composite (ECC) / Can. J. Civil Eng
Amin, M. / 2020 / Effect of using mineral admixtures and ceramic wastes as coarse aggregates on properties of ultrahigh-performance concrete / J. Clean. Prod 273:123073
Amin, M. / 2021 / Effects of nano cotton stalk and palm leaf ashes on ultrahighperformance concrete properties incorporating recycled concrete aggregates / Constr. Build. Mater 302:124196
Amin, M. / 2021 / Engineering properties of self-cured normal and high strength concrete produced using polyethylene glycol and porous ceramic waste as coarse aggregate / Constr. Build. Mater 299:124243
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