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Characteristic of Fresh and Harden Properties of Polyvinyl Alcohol fibre Reinforced Alkali Activated Composite

Journal of Renewable Materials 2023年第3期11卷 1321-1337页

作者： Yiguang Wang Zhe Zhang Xun Zhang School of Civil Engineering Zhengzhou UniversityZhengzhou450001China Henan Provincial Communications Planning Survey&Design Institute Co.Ltd.Zhengzhou450001China

fibre can enhance the mechanical properties of cement-based composites,but fibre also degrades their ***,the quantitative effects of fiber content and length-diameter ratio on alkali-activated materials are still *** aspect ratio,volume fraction of polyvinyl alcohol fibre(PVAF),and various water-binder ratio were employed to prepare a total of 26 groups of fibre reinforced alkali-activated composite(FRAAC).The influence of PVAF fibre factor(product of fiber volume fraction and length-diameter ratio)on flowability,compactness,strength,and crack fractal dimension of FRAAC was *** influence of water-binder ratio on the plastic viscosity of FRAAC was more significant than that on the yield *** fibre factor was lower than critical value of 150,the influence of fibres could be *** reason was that the space between fibres was distant,so the flowability of FRAAC was not impacted by *** this time,fibres were challenging to restrict the cracks in matrix and increase their mechanical *** fibre factor was higher than critical value 150 and lower than density packing value 450,the flexural strength,compressive strength and crack fractal dimension of FRAAC were considerably enhanced,and the FRAAC could still flow easily under dead *** fibre factor were above 450,noteworthy fibre balling considerably decreased the flowability,leading to poor solidity and reduced compressive ***,the ideal content of PVAF in alkali activated composite is between 150/(l/d)and 450/(l/d).

关键词： Alkali-activated composite fibre reinforced composite fibre factor flowability strength fractal dimension

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