纤维具有抗裂、抗冲击、耐磨性高、与水泥亲和性好等优点,能提高构件的强度,延长使用寿命,混凝土用钢纤维为使钢纤维较均匀地分散于砂浆或混凝土中,并增大纤维的长径比,可使用由水溶性胶粘结在一起成集束状的钢纤维。钢纤维可用冷拔钢丝切断、薄钢板剪切、钢块或钢锭铣削以及熔钢抽纱等方法制造。钢纤维厂家不同的制取方式产出的钢纤维性能也不一样。虽然钢纤维问世不久,但应用已经越来越广泛,种类也越来越多。钢纤维混凝土中钢纤维的主要作用是防止混凝土中微裂缝的扩展,延缓宏观裂缝的发生和发展。在加载初期(拉伸、弯曲),水泥基层材料和纤维共同承受外力作用,当混凝土开裂时,扩展裂缝的纤维成为外力的主要贡献者。
Steel
fibers have advantages such as crack resistance, impact resistance,
high wear resistance, and good affinity with cement, which can improve
the strength of components and extend their service life. In order to
evenly disperse steel fibers in mortar or concrete and increase the
length to diameter ratio of fibers, steel fibers bonded together with
water-soluble adhesive can be used to form bundles. Steel fibers can be
manufactured using methods such as cold drawn steel wire cutting, thin
steel plate shearing, steel block or ingot milling, and molten steel
drawing. The performance of steel fibers produced by different
production methods of steel fiber manufacturers also varies. Although
steel fibers have not been around for long, their applications have
become increasingly widespread and their types are also increasing. The
main function of steel fibers in steel fiber reinforced concrete is to
prevent the expansion of microcracks in the concrete and delay the
occurrence and development of macroscopic cracks. In the early stages of
loading (tension, bending), the cement base material and fibers jointly
bear external forces. When the concrete cracks, the fibers that expand
the cracks become the main contributors to the external forces.
钢纤维材料也是近些年新发展起来的,尤其是钢纤维混凝土的使用,可以改善混凝土的抗弯、抗拉及抗裂性等性能,更好的取代了传统的混凝土。具有施工便捷的特点。只需要把钢纤维添加到混凝土搅拌站,或者直接在现场添加都可以。
Steel
fiber materials have also developed in recent years, especially the use
of steel fiber reinforced concrete, which can improve the bending,
tensile, and crack resistance of concrete and better replace traditional
concrete. It has the characteristic of convenient construction. Just
add steel fibers to the concrete mixing plant, or add them directly on
site.