新闻动态
钢纤维粘结性
由于钢纤维与混凝土基体的界面粘结主要是物理性的，即以摩擦剪力的传递为主，因此对钢纤维本身来说，应该从纤维表面和纤维形状两个方面来改善其粘结性能。具体的方法有下列四种。
As the interface bond between steel fiber and concrete matrix is mainly physical, that is, the transfer of friction and shear force is the main factor, the bond performance of steel fiber itself should be improved from two aspects of fiber surface and fiber shape. There are four specific methods.
1。使钢纤维表面粗糙化、截面呈不规则形。采用熔抽法生产就能达到这个目的。因为钢纤维在遇空气急剧冷却时，表面收缩不均匀而变得粗糙，同时截面也收缩成月牙形，增加与基体的接触面积。铣削型钢纤维一个表面光滑，另一个表面粗糙，也增加了与混凝土的接触面积
1. The surface of steel fibers is roughened and the cross section is irregular. This can be achieved by melt extraction. When steel fibers are cooled sharply by air, the surface shrinkage becomes uneven and rough. At the same time, the cross section shrinks into crescent shape, which increases the contact area with the matrix. Milled profiled steel fibers have a smooth surface and a rough surface, which also increases the contact area with concrete.
⒉沿钢纤维轴线方向按一定间距对纤维进行塑性加工。例如日本神户制钢公司的“信柯”钢纤维美国雷邦公司的“XOREX"钢纤维以及庆安钢铁厂的“S-2”和“S--3"号钢纤维。由于表面压成棱形，或压成波形，增加了机械粘结力。
_Plastic processing of steel fibers along the axis of steel fibers with a certain distance. For example, the "Xinke" steel fibers of Kobe Steel Company of Japan and the "XOREX" steel fibers of Leibang Company of Amzhongyaogui.71ix.comzhenkongdai.37ix.com.cnshuitong.71ix.comdibanms.37ix.com.cn langan.37ix.com.cnbaiyangdian.37ix.com.cnerica, as well as the "S-2" and "S-3" steel fibers of Qingan Iron and Steel Works. As the surface is pressed into prism or waveform, the mechanical bonding force is increased.
⒊使钢纤维的两端异形化。如钢锭铣削型钢纤维两端带有锚固台；美国贝克尔公甸的"DRAMⅨ"钢纤维和庆安钢铁厂的“S-4'和as-so型钢纤维，.都是在两端制成弯钩；还有熔抽法抽取的大头形钢纤维。由于两端的锚固作用，提高了抗拨力。
_Profile the ends of steel fibers. For example, steel ingot milling steel fibers with anchorage platform at both ends; DRAM_steel fibers in Becker Gongdian, USA, and S-4 and as-so steel fibers in Qing'an Iron and Steel Works, are made into hooks at both ends; and large-head steel fibers extracted by melt-drawing method. Because of the anchorage effect at both ends, the pulling resistance is improved.
⒋对钢纤维表面涂覆环氧树脂和表面微锈化处理。这种方法对界面粘结强度的提高不如前几种方法，但也有一定的增强效果.
_Epoxy resin and micro-rusting treatment were applied on the surface of steel fibers. The improvement of interfacial bond strength by this method is not as good as the previous methods, but it also has some enhancement effect.
小林一辅、比利时列日大学和章文纲等的试脸都证明有弯钩的钢纤维比平直钢纤维的增强效果提高约一倍，小林一辅的试验说明压棱钢纤维的效果接近有弯钩的钢纤维。这些异形钢纤维不但提高了钢纤维的强度，并且提高了韧度。波形钢纤维虽然对提高钢纤维混凝土强度的作用不大，但是能成倍地提高韧度。
The test faces of Kobayashi, Liege University of Belgium and Zhang Wen Gang all proved that the reinforcing effect of steel fibers with curved hooks was about twice as much as that of straight steel fibers. Kobayashi's test showed that the effect of steel fibers with curved hooks was close to that of steel fibers with curved hooks. These special-shaped steel fibers not only improve the strength of steel fibers, but also improve the toughness. Although corrugated steel fiber has little effect on improving the strength of steel fiber reinforced concrete, it can double the toughness of steel fiber reinforced concrete.
As the interface bond between steel fiber and concrete matrix is mainly physical, that is, the transfer of friction and shear force is the main factor, the bond performance of steel fiber itself should be improved from two aspects of fiber surface and fiber shape. There are four specific methods.
1。使钢纤维表面粗糙化、截面呈不规则形。采用熔抽法生产就能达到这个目的。因为钢纤维在遇空气急剧冷却时，表面收缩不均匀而变得粗糙，同时截面也收缩成月牙形，增加与基体的接触面积。铣削型钢纤维一个表面光滑，另一个表面粗糙，也增加了与混凝土的接触面积
1. The surface of steel fibers is roughened and the cross section is irregular. This can be achieved by melt extraction. When steel fibers are cooled sharply by air, the surface shrinkage becomes uneven and rough. At the same time, the cross section shrinks into crescent shape, which increases the contact area with the matrix. Milled profiled steel fibers have a smooth surface and a rough surface, which also increases the contact area with concrete.
⒉沿钢纤维轴线方向按一定间距对纤维进行塑性加工。例如日本神户制钢公司的“信柯”钢纤维美国雷邦公司的“XOREX"钢纤维以及庆安钢铁厂的“S-2”和“S--3"号钢纤维。由于表面压成棱形，或压成波形，增加了机械粘结力。
_Plastic processing of steel fibers along the axis of steel fibers with a certain distance. For example, the "Xinke" steel fibers of Kobe Steel Company of Japan and the "XOREX" steel fibers of Leibang Company of Amzhongyaogui.71ix.comzhenkongdai.37ix.com.cnshuitong.71ix.comdibanms.37ix.com.cn langan.37ix.com.cnbaiyangdian.37ix.com.cnerica, as well as the "S-2" and "S-3" steel fibers of Qingan Iron and Steel Works. As the surface is pressed into prism or waveform, the mechanical bonding force is increased.
⒊使钢纤维的两端异形化。如钢锭铣削型钢纤维两端带有锚固台；美国贝克尔公甸的"DRAMⅨ"钢纤维和庆安钢铁厂的“S-4'和as-so型钢纤维，.都是在两端制成弯钩；还有熔抽法抽取的大头形钢纤维。由于两端的锚固作用，提高了抗拨力。
_Profile the ends of steel fibers. For example, steel ingot milling steel fibers with anchorage platform at both ends; DRAM_steel fibers in Becker Gongdian, USA, and S-4 and as-so steel fibers in Qing'an Iron and Steel Works, are made into hooks at both ends; and large-head steel fibers extracted by melt-drawing method. Because of the anchorage effect at both ends, the pulling resistance is improved.
⒋对钢纤维表面涂覆环氧树脂和表面微锈化处理。这种方法对界面粘结强度的提高不如前几种方法，但也有一定的增强效果.
_Epoxy resin and micro-rusting treatment were applied on the surface of steel fibers. The improvement of interfacial bond strength by this method is not as good as the previous methods, but it also has some enhancement effect.
小林一辅、比利时列日大学和章文纲等的试脸都证明有弯钩的钢纤维比平直钢纤维的增强效果提高约一倍，小林一辅的试验说明压棱钢纤维的效果接近有弯钩的钢纤维。这些异形钢纤维不但提高了钢纤维的强度，并且提高了韧度。波形钢纤维虽然对提高钢纤维混凝土强度的作用不大，但是能成倍地提高韧度。
The test faces of Kobayashi, Liege University of Belgium and Zhang Wen Gang all proved that the reinforcing effect of steel fibers with curved hooks was about twice as much as that of straight steel fibers. Kobayashi's test showed that the effect of steel fibers with curved hooks was close to that of steel fibers with curved hooks. These special-shaped steel fibers not only improve the strength of steel fibers, but also improve the toughness. Although corrugated steel fiber has little effect on improving the strength of steel fiber reinforced concrete, it can double the toughness of steel fiber reinforced concrete.
