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使用钢纤维和道路的坚固性有什么联系？
钢纤维是国际上近年来发展很快的新型水泥基复合材料,以其优良的抗拉抗弯强度、阻裂限缩能力、耐冲击及优良的抗渗、抗冻性能而成功地应用于军事、水利、建筑、机场、公路等领域,目前它已成为研究较多、应用较广的水泥基复合材料之一。
Steel fiber is a new type of cement-based composite material developed rapidly in recent years. It has been successfully applied in military, water conservancy, construction, airport, highway and other fields because of its excellent tensile and flexural strength, crack resistance and shrinkage limitation, impact resistance and excellent impermeability and frost resistance. At present, it has become one of the cement-based composite materials with more research and wide application.
研究表明,混凝土基材中掺入钢纤维是提高混凝土韧性、抗冲击性能和抑制砂浆塑性收缩开裂的一条有效途。由于钢纤维均布于混凝土基体中,能减缓因荷载在混凝土基体中所引起的细裂缝端部的应力集中,从而控制混凝土裂缝的扩展,提高混凝土的抗裂性.同时混凝土与钢纤维有很强的界面粘结力,当载荷作用时,使钢纤维作为一个整体抵抗荷载的作用,显着提高了混凝土原有的抗拉,抗弯强度和断裂延伸率;使结构的刚度及承载力性能也有所改善.钢纤维的损伤与破坏是非常复杂的,其断裂特性是与钢纤维在混凝土端部的相互作用密切相关的。
The results show that steel fiber is an effective way to improve the toughness, impact resistance and restrain the plastic shrinkage cracking of mortar. Because steel fibers are distributed in the concrete matrix, they can reduce the stress concentration at the end of cracks caused by loads in the concrete matrix, thus controlling the expansion of concrete cracks and improving the crack resistance of concrete. At the same time, concrete and steel fibers have strong interfacial bonding force. When loaded, the effect of steel fibers as a whole to resist loads significantly improves the original concrete. Tensile strength, flexural strength and elongation at break also improve the stiffness and bearing capacity of the structure. Damage and failure of steel fibers are very complex, and their fracture characteristics are closely related to the interaction of steel fibers at the end of concrete.
钢纤维除抗渗性能与普通混凝土相比没有明显变化外,由于钢纤维抗裂性、整体性好,因而耐冻融性、耐热性、耐磨性、抗气蚀性和抗腐蚀性均有显著提高。当钢纤维破坏时,大都是纤维被拔出而不是被拉断,因此改善纤维与基体间的粘结强度是改善纤维增强效果的主要控制因素之一。
In addition to the impermeability of steel fibers, there is no obvious change compared with ordinary concrete. Because of the crack resistance and good integrity of steel fibers, the freeze-thaw zhangjiakou.75ix.cnshusongdaiz.37ix.com.cn diaodai.37ix.com.cn suojuw.37ix.com.cnnianhejik.37ix.com.cnhandan.75ix.cnresistance, heat resistance, wear resistance, cavitation resistance and corrosion resistance of steel fibers are significantly improved. When steel fibers are destroyed, most of them are pulled out rather than broken. Therefore, improving the bond strength between fibers and matrix is one of the main controlling factors to improve the effect of fiber reinforcement.
Steel fiber is a new type of cement-based composite material developed rapidly in recent years. It has been successfully applied in military, water conservancy, construction, airport, highway and other fields because of its excellent tensile and flexural strength, crack resistance and shrinkage limitation, impact resistance and excellent impermeability and frost resistance. At present, it has become one of the cement-based composite materials with more research and wide application.
研究表明,混凝土基材中掺入钢纤维是提高混凝土韧性、抗冲击性能和抑制砂浆塑性收缩开裂的一条有效途。由于钢纤维均布于混凝土基体中,能减缓因荷载在混凝土基体中所引起的细裂缝端部的应力集中,从而控制混凝土裂缝的扩展,提高混凝土的抗裂性.同时混凝土与钢纤维有很强的界面粘结力,当载荷作用时,使钢纤维作为一个整体抵抗荷载的作用,显着提高了混凝土原有的抗拉,抗弯强度和断裂延伸率;使结构的刚度及承载力性能也有所改善.钢纤维的损伤与破坏是非常复杂的,其断裂特性是与钢纤维在混凝土端部的相互作用密切相关的。
The results show that steel fiber is an effective way to improve the toughness, impact resistance and restrain the plastic shrinkage cracking of mortar. Because steel fibers are distributed in the concrete matrix, they can reduce the stress concentration at the end of cracks caused by loads in the concrete matrix, thus controlling the expansion of concrete cracks and improving the crack resistance of concrete. At the same time, concrete and steel fibers have strong interfacial bonding force. When loaded, the effect of steel fibers as a whole to resist loads significantly improves the original concrete. Tensile strength, flexural strength and elongation at break also improve the stiffness and bearing capacity of the structure. Damage and failure of steel fibers are very complex, and their fracture characteristics are closely related to the interaction of steel fibers at the end of concrete.
钢纤维除抗渗性能与普通混凝土相比没有明显变化外,由于钢纤维抗裂性、整体性好,因而耐冻融性、耐热性、耐磨性、抗气蚀性和抗腐蚀性均有显著提高。当钢纤维破坏时,大都是纤维被拔出而不是被拉断,因此改善纤维与基体间的粘结强度是改善纤维增强效果的主要控制因素之一。
In addition to the impermeability of steel fibers, there is no obvious change compared with ordinary concrete. Because of the crack resistance and good integrity of steel fibers, the freeze-thaw zhangjiakou.75ix.cnshusongdaiz.37ix.com.cn diaodai.37ix.com.cn suojuw.37ix.com.cnnianhejik.37ix.com.cnhandan.75ix.cnresistance, heat resistance, wear resistance, cavitation resistance and corrosion resistance of steel fibers are significantly improved. When steel fibers are destroyed, most of them are pulled out rather than broken. Therefore, improving the bond strength between fibers and matrix is one of the main controlling factors to improve the effect of fiber reinforcement.
