Steel fiber refers to the fiber whose diameter ratio (the ratio of fiber length to its diameter) is 30-100 by cutting fine steel wire, shearing cold-rolled strip, milling ingot or rapid condensation of molten steel. Corrugated steel fibers are widely used in steel fibers.

如何防止钢纤维生锈

How to prevent steel fiber from rusting

钢纤维进行增强处理后,钢纤维能够控制裂缝的打开,并且传递拉应力,发生应力重分布,然后前进混凝土的裂后强度,使混凝土具有恰当的曲折韧度。和素混凝土比较,混凝土的抗拉强度较低,一旦开裂后会发生脆性损坏,钢纤维混凝土在发生变形后仍能承当荷载。

_Steel fibers can control the opening of cracks, transfer tensile stress, redistribute stress, and then advance the strength of concrete after cracking, so that concrete has proper flexural toughness. Compared with plain concrete,kongzhix.89ix.comyapianjix.89ix.com buchanggui.89ix.com hengwenx.89ix.com chuanganqih.89ix.comshiyanx.89ix.com the tensile strength of concrete is lower. Once cracked, brittle damage will occur, and steel fiber reinforced concrete can still bear the load after deformation.

钢纤维表面不得有油污,不得镀有有害物质和其他影响钢纤维与混凝土粘接的杂质或土层。钢纤维内含有的因加工不良构成的粘接片,表面严峻锈蚀的钢纤维,铁锈粉及杂质的总重量不得超越钢纤维总重量的3%。钢纤维使用时需求喷射前要检查开挖断面的质量,处理好超欠挖。材料有必要满意规范或规划要求。喷射前,岩面有必要清洁,喷射混凝土支护应与围岩紧密粘接,结合健壮,不能有空泛,喷层内不容许增加片石和木板等杂物,必要时应进行粘结力测验。

_Steel fibers shall not be coated with oil, harmful substances or other impurities or soil that affect the bonding between steel fibers and concrete. The total weight of adhesives, steel fibers, rust powder and impurities on the surface of steel fibers, which are badly processed, shall not exceed 3% of the total weight of steel fibers. The quality of excavation section should be checked before spraying steel fibers, and the over-excavation and under-excavation should be handled properly. Material needs to satisfy specifications or planning requirements. Before spraying, it is necessary to clean the rock surface. The shotcrete support should be closely bonded with the surrounding rock. It should be robust and not be empty. It is not allowed to add debris and wood board in the spraying layer. When necessary, the bonding force test should be carried out.