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钢纤的发展效益
钢纤维是以改性聚丙烯为原料,经挤压、拉伸、表面改性处理、短切等工序加工而成。纤维外观为多根纤维单丝相互交连而成的网状结构。当网状纤维投入到混凝土后,网状纤维被挤压撕开成为一根根两头带钩形的单丝且相互牵扣多向分布,增强了纤维和混凝土的粘接力。大量纤维在混凝土中呈三维立体分布,提供网状承托作用,从根本上改变混凝土的抗裂、抗冲击、抗疲劳、抗磨损性能,大大提高混凝土的韧性及变形能力,从而大大提高混凝土工程质量。作为一种新型的混凝土增强纤维,聚丙烯网状纤维正成为纤维混凝土科学研究的应用领域的新热点。
Steel fibers are made from modified polypropylene by extrusion, stretching, surface modification and chopping. The appearance of the fibers is a network structure formed by the intersection of multiple filaments. When the reticulated fibers are put into concrete, the reticulated fibers are extruded and torn into single wires with hooks at both ends and intertwined in many directions, which enhances the bonding force between the fibers and concrete. A large number of fibers are distributed in concrete in three-dimensional form, which provides reticulate supporting effect, fundamentally changes the crack resistance, impact resistance, fatigue resistance and wear resistance of concrete, greatly improves the toughness and deformation ability of concrete, and thus greatly improves the quality of concrete engineering. As a new type of concrete reinforcing fiber, polypropylene reticulate fiber is becoming a new hotspot in the field of research and application of fiber reinforced concrete.
钢纤维是近年来开发成功的一种新型建筑材料。由生产工艺大体可分为切削型、剪切型、铣削型。钢纤维产品设计形状上带有微痕,增强了与混凝土的粘结力.提高混凝土的性能,抗结团性能好.在国内外已得到了广泛的应用。混凝土在护养过程中.会困钙矾石形成引起的损失、因水化热与温度引起爆裂等现象。而由于该纤维的掺入能避免泌水与离析现象.起到缓凝、保水的作用.进而提高了混凝土的强度。实践证明.在新建或大修工程中采用抗车辙能力强的沥青混合料可以最大限度地避免沥青路面出现车辙病害。并太幅度降低养护费用,由此产生的直接经济效益和综合社会效益极其显著。
Steel fiber is a new type of building material developed successfully in recent years. The production process can be roughly divided into cutting type, shearing type and milling type. The design of steel fiber products has micro-marks in shape, which enhances the bonding force with concrete, improves the performance of concrete and has good anti-aggregation performance. It has been widely used at home and abroad. In the course of maintenance, concrete will be trapped in the loss caused by ettringite formation and bursting caused by hydration heat and temperature. The addition of the fibers can avoid bleeding and segregation, play a role of retarding and retaining water, and thus improve the strength of concrete. Practice has proved that the use of asphalt mixture with strong rutting resistance in new or overhaul projects can minimize the occurrence of rutting diseases on asphalt pavement. The direct economic benefit and comprehensive social benefit are extremely remarkable.
Steel fibers are made from modified polypropylene by extrusion, stretching, surface modification and chopping. The appearance of the fibers is a network structure formed by the intersection of multiple filaments. When the reticulated fibers are put into concrete, the reticulated fibers are extruded and torn into single wires with hooks at both ends and intertwined in many directions, which enhances the bonding force between the fibers and concrete. A large number of fibers are distributed in concrete in three-dimensional form, which provides reticulate supporting effect, fundamentally changes the crack resistance, impact resistance, fatigue resistance and wear resistance of concrete, greatly improves the toughness and deformation ability of concrete, and thus greatly improves the quality of concrete engineering. As a new type of concrete reinforcing fiber, polypropylene reticulate fiber is becoming a new hotspot in the field of research and application of fiber reinforced concrete.
钢纤维是近年来开发成功的一种新型建筑材料。由生产工艺大体可分为切削型、剪切型、铣削型。钢纤维产品设计形状上带有微痕,增强了与混凝土的粘结力.提高混凝土的性能,抗结团性能好.在国内外已得到了广泛的应用。混凝土在护养过程中.会困钙矾石形成引起的损失、因水化热与温度引起爆裂等现象。而由于该纤维的掺入能避免泌水与离析现象.起到缓凝、保水的作用.进而提高了混凝土的强度。实践证明.在新建或大修工程中采用抗车辙能力强的沥青混合料可以最大限度地避免沥青路面出现车辙病害。并太幅度降低养护费用,由此产生的直接经济效益和综合社会效益极其显著。
Steel fiber is a new type of building material developed successfully in recent years. The production process can be roughly divided into cutting type, shearing type and milling type. The design of steel fiber products has micro-marks in shape, which enhances the bonding force with concrete, improves the performance of concrete and has good anti-aggregation performance. It has been widely used at home and abroad. In the course of maintenance, concrete will be trapped in the loss caused by ettringite formation and bursting caused by hydration heat and temperature. The addition of the fibers can avoid bleeding and segregation, play a role of retarding and retaining water, and thus improve the strength of concrete. Practice has proved that the use of asphalt mixture with strong rutting resistance in new or overhaul projects can minimize the occurrence of rutting diseases on asphalt pavement. The direct economic benefit and comprehensive social benefit are extremely remarkable.
