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1. IntroductionPolypropylene fibre (PPF) is a kind of linear polymersynthetic fibre obtained from propylene polymerization. Ithas some advantages such as light weight, high strength, hightoughness, and corrosion resistance. ,e PPF is widely usedin chemical industry, energy, clothing, environmentalprotection, and construction [1–6]. In the constructionindustry, concrete has the disadvantages of low tensilestrength, weak deformation resistance, and poor crack resistance. ,e microcracks are easily produced from theoutside to the inside, which increase the permeability of theconcrete. Water or other harmful ions easily enter the interior of the concrete and accelerate the deterioration of theconcrete [7]. When PPF is added in concrete, the threedimensional random distribution network structure can beformed in concrete, which effectively inhibit the microcrackgeneration and development [8–11]. As a result, the PPF canprevent water and other harmful ions entering into concrete.,e durability of concrete can be improved by adding PPF[4, 12–14]. Due to the excellent properties, PPF can be usedin architectural engineering, pavement engineering, andhydraulic engineering [7, 15–17]. In architectural engineering, the foundation construction of high-rise buildingneeds to be poured mass concrete at one time. ,e massconcrete is easy to produce thermal cracks at the early age[18, 19]. ,e PPF can effectively reduce the temperaturecracks of the concrete [20]. Moreover, the resist-permeability of the concrete can be enhanced by adding PPFs dueto less through cracks in the concrete [12, 21]. In pavementengineering, pavement often bears the impact load of vehicles, which requires good toughness and crack resistance,especially the pavement with large traffic volume or heavyloading traffic [22, 23]. ,e PPF-reinforced concrete hasbetter toughness than the plain concrete [24, 25]. When PPFis used in concrete, the toughness of pavement can besignificantly strengthened [7]. Meanwhile, less creaks areemerged under impact load of vehicles, indicating that thedurability of pavement is enhanced by using PPFs in concrete [26, 27]. Hydraulic engineering, such as the bridge.

1. Introduction Polypropylene fibre (PPF) is a kind of linear polymersynthetic fibre obtained from propylene polymerization. Ithas some advantages such as lightweight, high strength, high toughness, and corrosion resistance. ,e PPF is widely used in the chemical industry, energy, clothing, environmental protection, and construction [1–6]. In the construction industry, concrete has the disadvantages of low tensile strength, weak deformation resistance, and poor crack resistance. ,e microcracks are easily produced from the outside to the inside, which increases the permeability of concrete. Water or other harmful ions easily enter the interior of the concrete and accelerate the deterioration of concrete [7]. When PPF is added to concrete, the threedimensional random distribution network structure can be formed in concrete, which effectively inhibits microcrack generation and development [8–11]. As a result, the PPF can prevent water and other harmful ions from entering into concrete.,e durability of concrete can be improved by adding PPF[4, 12–14]. Due to its excellent properties, PPF can be used in architectural engineering, pavement engineering, and hydraulic engineering [7, 15–17]. In architectural engineering, the foundation construction of a high-rise building needs to be poured mass concrete at one time. ,e mass concrete is easy to produce thermal cracks at an early age[18, 19]. ,e PPF can effectively reduce the temperature cracks of the concrete [20]. Moreover, the resist-permeability of the concrete can be enhanced by adding PPFs due to fewer through cracks in the concrete [12, 21]. In pavement engineering, pavement often bears the impact load of vehicles, which requires good toughness and crack resistance, especially pavement with large traffic volumes or heavy loading traffic [22, 23]. ,e PPF-reinforced concrete has better toughness than plain concrete [24, 25]. When PPF is used in concrete, the toughness of pavement can be significantly strengthened [7]. Meanwhile, fewer creaks reemerged under the impact load of vehicles, indicating that the durability of pavement is enhanced by using PPFs in concrete [26, 27]. Hydraulic engineering, such as the bridge.