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压痕型钢纤维
压痕型钢纤维是由冷轧钢带经分带、剪切而制成,抗拉强度大于600Mpa,能够均匀分布于混凝土中的剪切型钢纤维。压痕型钢纤维性能优良,与水泥基体材料有良好的粘结性能,不仅能有效减少混凝土因塑性收缩、干燥收缩、温度变化等原因引起的微裂缝的扩展,亦可阻滞宏观裂缝的形成和发展。从而明显改善纤维混凝土的抗裂、抗拉、抗剪、抗弯、抗冲磨、抗疲劳性能,提高断裂韧性、抗震抗爆及裂后延性等多项性能。已经在高速公路、桥梁、摩天大楼、地铁、隧道等土木工程中获得广泛应用。高强度、高韧性、高耐久性的纤维混凝土已经取得了长足发展,代替传统的钢筋混凝土或预应力混凝土已经成为国际趋势。在国外,纤维增强水泥混凝土复合材料已经广泛应用于非承重构件中。国内的研究起步较晚,海合成纤维研究所研究了锦纶短纤维对水混凝土的增强效果,公司将维纶用于增强混凝土。此外,一些高校和研究院所也就不同种类纤维对混凝土性能的改善作用进行了研究。
The indentated steel fibers are made of cold rolled steel strips by zoning and shearing. The tensile strength of the indentated steel fibers is more than 600 Mpa, which can be evenly distributed in concrete. The indentated steel fibers have excellent properties and good bonding properties with cement matrix materials. They can not only effectively reduce the expansion of microcracks caused by plastic shrinkage, drying shrinkage and temperature change, but also retard the formation and development of macro-cracks. Thus, the crack resistance, tension resistance, shear resistance, bending resistance, abrasion resistance and fatigue resistance of fiber reinforced concrete are obviously tiexinn.07858.netqingxiji.07858.netjilin.89ix.comshenyang.89ix.comxining.89ix.comimproved, and the fracture toughness, shock resistance, explosion resistance and crack delay are also improved. It has banzhi.37ix.com.cnbeen widely used in highway, bridge, skyscraper, subway, tunnel and other civil engineering. Fiber reinforced concrete (FRC) with high strength, high toughness and high durability has made great progress. It has become an international trend to replace traditional reinforced concrete or pre-stressed concrete. In foreign countries, fiber reinforced cement concrete composites have been widely used in non-bearing components. Domestic research started relatively late. Hai Synthetic Fiber Research Institute studied the reinforcement effect of nylon staple fiber on concrete. The company used vinylon to reinforce concrete. In addition, some universities and institutes have also studied the effect of different kinds of fibers on the improvement of concrete performance.
The indentated steel fibers are made of cold rolled steel strips by zoning and shearing. The tensile strength of the indentated steel fibers is more than 600 Mpa, which can be evenly distributed in concrete. The indentated steel fibers have excellent properties and good bonding properties with cement matrix materials. They can not only effectively reduce the expansion of microcracks caused by plastic shrinkage, drying shrinkage and temperature change, but also retard the formation and development of macro-cracks. Thus, the crack resistance, tension resistance, shear resistance, bending resistance, abrasion resistance and fatigue resistance of fiber reinforced concrete are obviously tiexinn.07858.netqingxiji.07858.netjilin.89ix.comshenyang.89ix.comxining.89ix.comimproved, and the fracture toughness, shock resistance, explosion resistance and crack delay are also improved. It has banzhi.37ix.com.cnbeen widely used in highway, bridge, skyscraper, subway, tunnel and other civil engineering. Fiber reinforced concrete (FRC) with high strength, high toughness and high durability has made great progress. It has become an international trend to replace traditional reinforced concrete or pre-stressed concrete. In foreign countries, fiber reinforced cement concrete composites have been widely used in non-bearing components. Domestic research started relatively late. Hai Synthetic Fiber Research Institute studied the reinforcement effect of nylon staple fiber on concrete. The company used vinylon to reinforce concrete. In addition, some universities and institutes have also studied the effect of different kinds of fibers on the improvement of concrete performance.
