新闻动态
纤维在各类建筑工程中广泛应用
钢纤维以切断细钢丝法、冷轧带钢剪切、钢锭铣削或钢水快速冷凝法制成长径比,也就是纤维长度与其直径的比值,当纤维截面为非圆形时,采用换算等效截面圆面积的直径,为40~80的纤维,常见的冷拔钢丝拉伸强度为800-2000MPa、钢锭铣削法为700MPa.不管使用哪种钢纤维都是为了增强混凝土而生产的,在加入混凝土中进行搅拌,可以增加纤维和混凝土的界面粘结,纤维截面有不同的形状,常见的有矩形、锯齿形、弯月形等,可以大幅度提高混凝土的韧性和抗冲击性。
Steel fibers are grown by cutting fine steel wires, shearing cold rolled strips, milling ingots or rapid condensation of molten steel, i.e. the ratio of fiber length to its diameter. When the cross-section of the fibers is non-circular, the diameter of the equivalent cross-section circle area is converted to 40-80 fibers. The tensile strength of common cold drawn steel wires is 800-2000 MPa and steel ingots. Milling method is 700 MPa. No matter which kind of steel fiber is used to strengthen concrete, mixing in concrete can increase the interface bond between fiber and concrete. The cross section of fiber has different shapes. Rectangular, zigzag, meniscus and so on are common, which can greatly improve the toughness and impact resistance of concrete.
钢纤维是当代国际混凝土技术发展的最新动态,而纤维混凝土是近年来发展最快、应用最为广泛的混凝土新型复合材料。在混凝土机体中掺入少量纤维,可使混凝土物理力学性能产生质的变化,大大提高混凝土抗裂性、抗冲击性及韧性等,使混凝土从传统的低抗拉脆性材料变为高强度韧性材料,因而能广泛用于土建、隧道、水利、交通、矿山、冶金化工、港口等混凝土结构工程。
Steel fiber is the latest development of contemporary international concrete technology, and fiber reinforced concrete is the fastest-growing and most widely used new concrete composite material in recent years. Mixing a small amount of fibers into concrete body can change the physical and mechanical properties of concrete qualitatively, greatly improve the crack resistance, impact resistance and toughness of concrete, and make concrete change from traditional low-tension brittle material to high-strength and tough material. Therefore, it can be widely used in civil engineering, tunnel, water conservancy, transportation, mining and metallurgy. Concrete structures such as works and ports.
钢纤维混凝土具有较高的抗冲磨、抗气蚀才能,因而可用于溢洪道、消力池、闸底板等接受高速水流效果的部位。如:大渡河支流南桠河石棉二级电站,该电站是引水式径流电站,1965年建成发电。昔时汛期后,冲砂闸底板和护坦被冲成深槽,最深处达0.7m,埋设的28mm钢筋悉数磨断,1968年和1969年先后两次用辉绿岩铸石板、环氧混凝土、混凝土进行修补加固比照实验,除环氧混凝土在一个汛期内磨损10~50mm外(后来也被冲垮了),其他资料不到一个汛期悉数被砸碎冲失落。
Steel fiber reinforced concrete (SFRC) has high ability of anti-erosion and anti-cavitation, so it can be used in spillway, stilling pool, sluice floor and other parts to accept the effect of high-speed flow. For example, the Nanyahe asbestos secondary power station, a tributary of Dadu River, was built in 1965 as a diversion runoff power station. After the flood season in the past, the bottom slab and apron of the sand-washing sluice were washed into deep grooves with the deepest depth of 0.7m and all the 28 mm steel bars buried were worn off. In 1968 and 1969, the diabase cast slab, epoxy concrete and concrete were used to repair and reinforce two times. Except epoxy concrete was worn 10-50mm in a flood season (later also washed out), other experiments were carried out. In less than one flood season, all the data were smashed and destroyed.
Steel fibers are grown by cutting fine steel wires, shearing cold rolled strips, milling ingots or rapid condensation of molten steel, i.e. the ratio of fiber length to its diameter. When the cross-section of the fibers is non-circular, the diameter of the equivalent cross-section circle area is converted to 40-80 fibers. The tensile strength of common cold drawn steel wires is 800-2000 MPa and steel ingots. Milling method is 700 MPa. No matter which kind of steel fiber is used to strengthen concrete, mixing in concrete can increase the interface bond between fiber and concrete. The cross section of fiber has different shapes. Rectangular, zigzag, meniscus and so on are common, which can greatly improve the toughness and impact resistance of concrete.
钢纤维是当代国际混凝土技术发展的最新动态,而纤维混凝土是近年来发展最快、应用最为广泛的混凝土新型复合材料。在混凝土机体中掺入少量纤维,可使混凝土物理力学性能产生质的变化,大大提高混凝土抗裂性、抗冲击性及韧性等,使混凝土从传统的低抗拉脆性材料变为高强度韧性材料,因而能广泛用于土建、隧道、水利、交通、矿山、冶金化工、港口等混凝土结构工程。
Steel fiber is the latest development of contemporary international concrete technology, and fiber reinforced concrete is the fastest-growing and most widely used new concrete composite material in recent years. Mixing a small amount of fibers into concrete body can change the physical and mechanical properties of concrete qualitatively, greatly improve the crack resistance, impact resistance and toughness of concrete, and make concrete change from traditional low-tension brittle material to high-strength and tough material. Therefore, it can be widely used in civil engineering, tunnel, water conservancy, transportation, mining and metallurgy. Concrete structures such as works and ports.
钢纤维混凝土具有较高的抗冲磨、抗气蚀才能,因而可用于溢洪道、消力池、闸底板等接受高速水流效果的部位。如:大渡河支流南桠河石棉二级电站,该电站是引水式径流电站,1965年建成发电。昔时汛期后,冲砂闸底板和护坦被冲成深槽,最深处达0.7m,埋设的28mm钢筋悉数磨断,1968年和1969年先后两次用辉绿岩铸石板、环氧混凝土、混凝土进行修补加固比照实验,除环氧混凝土在一个汛期内磨损10~50mm外(后来也被冲垮了),其他资料不到一个汛期悉数被砸碎冲失落。
Steel fiber reinforced concrete (SFRC) has high ability of anti-erosion and anti-cavitation, so it can be used in spillway, stilling pool, sluice floor and other parts to accept the effect of high-speed flow. For example, the Nanyahe asbestos secondary power station, a tributary of Dadu River, was built in 1965 as a diversion runoff power station. After the flood season in the past, the bottom slab and apron of the sand-washing sluice were washed into deep grooves with the deepest depth of 0.7m and all the 28 mm steel bars buried were worn off. In 1968 and 1969, the diabase cast slab, epoxy concrete and concrete were used to repair and reinforce two times. Except epoxy concrete was worn 10-50mm in a flood season (later also washed out), other experiments were carried out. In less than one flood season, all the data were smashed and destroyed.
