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玄武岩纤维是一种新型的纯天然绿色纤维。本文将分散的玄武岩纤维丝掺入膨胀土中,研究玄武岩纤维加筋膨胀土的强度与变形特性。试验中,按纤维含量与干土质量比分别为0.0%,0.2%,0.4%和0.6%的比例配制试样。通过室内试验,研究表明:纤维的增加可抑制膨胀土的胀缩性;增加纤维含量,土的无侧限抗压强度和抗剪强度均有所增大,当纤维含量超过最优加筋量0.4%时,加筋膨胀土的无侧限抗压强度和抗剪强度反而会降低。因此,通过掺加玄武岩纤维增强材料,可以获得强度和韧性更高的纤维膨胀土,为膨胀土性质的改良提供一种可借鉴的方法。
Basalt fiber is a new type of pure natural green fiber. In this paper, the dispersion of basalt fiber wire into the expansive soil, basalt fiber reinforced expansive soil strength and deformation characteristics. Test, according to the fiber content and dry soil mass ratio of 0.0%, 0.2%, 0.4% and 0.6% ratio of the preparation of the sample. Through laboratory tests, the results show that: the increase of fibers can restrain the expansibility of expansive soil; the increase of fiber content increases the unconfined compressive strength and shear strength of soil; when the fiber content exceeds the optimal amount of reinforcement 0.4%, the unconfined compressive strength and shear strength of the reinforced expansive soil will be reduced. Therefore, by adding basalt fiber reinforcements, fiber expansive soil with higher strength and toughness can be obtained, which can provide a reference method for the improvement of the properties of expansive soils.