In order to improve the mechanical properties and durability of geopolymer concrete,experi-mental studies were conducted on the effects of incorporating polypropylene fibers of varying lengths and dosages on the mechanical properties,frost resistance,chloride ion corrosion resistance,and crack resist-ance of geopolymer concrete.Furthermore,based on SEM experiments,the mechanism of action of poly-propylene fibers was further elucidated from a microscopic perspective.The research results indicated that the addition of polypropylene fibers can improve both the mechanical properties and durability of geopoly-mer concrete.Specifically,when the fiber content is 0％-0.6％,the improvement effect of geopolymer concrete becomes more pronounced with the increase of fiber content.However,when the dosage exceeds 0.6％,both the mechanical properties and durability begin to decline.SEM analysis further indicated that polypropylene fibers can improve the integrity and compactness of the matrix,thereby significantly impro-ving the mechanical properties and durability of geopolymer concrete.Ultimately,the optimal dosage of polypropylene fibers is recommended to be 0.6％with a length of 12 mm.
关键词
聚丙烯纤维/地聚物混凝土/力学性能/抗冻性能/抗氯离子侵蚀性
Key words
polypropylene fiber/geopolymer concrete/mechanical properties/frost resistance/resistance to chloride ion corrosion
维普
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