锈蚀后钢纤维和钢纤维混凝土的力学性能

发布时间：2018-06-27 16:29

本文选题：钢纤维 + 钢纤维混凝土　；参考：《建筑材料学报》2015年03期

【摘要】：通过对剪切型、铣削型、切断型3种钢纤维和钢纤维混凝土的快速锈蚀试验,研究了锈蚀前后钢纤维的外观、弯折性能和抗拉强度的变化,以及钢纤维混凝土经过不同锈蚀时间后的抗压强度和抗拉强度的变化规律.结果表明:随锈蚀时间的增加,钢纤维的锈蚀程度逐渐增大,弯折性能和抗拉强度逐渐降低,钢纤维混凝土的抗压强度和抗拉强度随之减小.但是抗压强度和抗拉强度的变化规律有所不同,当锈蚀时间较短时,抗压强度变化不明显,在锈蚀时间超过60d以后,抗压强度显著降低.而抗拉强度随锈蚀时间的增加逐渐下降.锈蚀时间相同时,抗拉强度的降低幅度比抗压强度的降低幅度小.切断型钢纤维的抗锈蚀能力相对较好,剪切型和铣削型钢纤维的抗锈蚀能力相对较差.
[Abstract]:The changes of appearance, flexural properties and tensile strength of steel fibers before and after corrosion were studied through the rapid corrosion tests of three kinds of steel fibers and steel fiber concrete, such as shear type, milling type and cut type. And the change of compressive strength and tensile strength of steel fiber reinforced concrete after different corrosion time. The results show that with the increase of corrosion time, the corrosion degree of steel fiber increases, the flexural strength and tensile strength decrease, and the compressive strength and tensile strength of steel fiber reinforced concrete decrease. However, the variation of compressive strength and tensile strength is different. When the corrosion time is short, the change of compressive strength is not obvious, but after the corrosion time exceeds 60 days, the compressive strength decreases significantly. The tensile strength decreases with the increase of corrosion time. When corrosion time is the same, the decrease of tensile strength is smaller than that of compressive strength. The corrosion resistance of sectioned steel fibers is relatively good, and that of shear and milling steel fibers is relatively poor.
【作者单位】：郑州大学力学与工程科学学院;
【基金】：河南省高校科技创新团队项目(15IRTSTHN026) 教育部新世纪优秀人才支持计划项目(NCET-09-0125)
【分类号】：TU528.572

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