Study on tensile mechanical response and microstructure of polypropylene fiber reinforced loess under freezing.

One-way analysis of variance (ANOVA) indicated that fiber content had a highly significant effect on the peak stress of the specimens (F(4,10) = 68.71, P = 3.58 × 10 − 7).

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Even at high parameters, fibers continue to fill small voids; however, this filling effect is counterbalanced by the simultaneous generation of large voids, with an overall trend towards reduced void quantity.

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The maximum equivalent aperture exhibits an increasing trend with rising fiber parameters, whilst the number of small pores smaller than 15 μm diminishes as fiber parameters increase.

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