新闻动态
钢纤维混凝土的发展
纤维混凝土（FRC），是纤维增强混凝土的简称，通常是以水泥净浆、砂浆或者混凝土为基体，以金属纤维、无机纤维或有机纤维增强材料组成的一种水泥基复合材料。它是将短而细的，具有高抗拉强度、高极限延伸率、高抗碱性的纤维均匀地分散在混凝土基体中形成的一种新型建筑材料。纤维在混凝土中可限制混凝土早期裂缝的产生及在外力作用下裂缝的进一步扩展，有效克服混凝土抗拉强度低、易开裂、抗疲劳性能差等固有缺陷，同时可大幅度提高混凝土的抗渗、防水、抗冻、护筋性等方面的性能。纤维混凝土尤其是钢纤维混凝土，由于其优越的性能，在实际工程中日益得到学术界和工程界的关注。1907年苏联专家B.П.HekpocaB开始用金属纤维增强混凝土；1910年，美国H.F.Porter发表了有关短纤维增强混凝土的研究报告，建议把短钢纤维均匀地分散在混凝土中用以强化基体材料；1911年，美国Graham曾把钢纤维掺入普通混凝土中，提高混凝土强度和稳定性；到20世纪40年代，美、英、法、德、日等国先后做了许多关于用钢纤维来提高混凝土耐磨性和抗裂性、钢纤维混凝土制造工艺、改进钢纤维形状以提高纤维与混凝土基体的黏结强度等方面的研究；1963年J.P.Romualdi和G.B.Batson发表了关于钢纤维约束混凝土裂缝开展机理的论文，提出了钢纤维混凝土开裂强度是由对拉伸应力起有效作用的钢纤维平均间距所决定的结论（纤维间距理论），从而开始了这种新型复合材料的实用开发阶段。到目前，随着钢纤维混凝土的推广应用，因纤维在混凝土中的分布情况不同，主要有四类：钢纤维混凝土、混杂纤维混凝土、层布式钢纤维混凝土和层布式混杂纤维混凝土。
Fiber reinforced concrete (FRC) is short for fiber reinforced concrete (FRC). It is usually a kind of cement-based composite material, which is composed of metal fibers, inorganic fibers or organic fibers reinforced with cement paste, mortar or concrete as the matrix. It is a new kind of building material, which distributes short and thin fibers with high tensile strength, high ultimate elongation and high alkali resistance evenly in concrete matrix. Fiber in concrete can limit the occurrence of early cracks and the further expansion of cracks under external forces, effectively overcome the inherent defects of concrete such as low tensile strength, easy cracking, poor fatigue resistance, and can greatly improve the impermeability, waterproof, frost resistance, reinforcement and other properties of concrete. Fiber reinforced concrete (FRC), especially steel fiber reinforced concrete (SFRC), has attracted more and more attention in academia and engineering field due to its superior performance. In 1907, Soviet expert B. _. HekpocaB began to use metal fiber reinforced concrete; in 1910, H. F. Porter published a research report on short fiber reinforced concrete, suggesting that short steel fibers should be evenly dispersed in concrete to strengthen the matrix material; in 1911, Graham, the United States, mixed steel fibers into ordinary concrete. In 1940s, the United States, Britain, France, Germany, Japan and other countries have done a lot of research on using steel fiber to improve the wear resistance and crack resistance of concrete, steel fiber concrete manufacturing technology, steel fiber shape to improve the bond strength between fiber and concrete matrix; 1963 J.P. Romualdi and G.B. Batson published papers on the mechanism of crack development of steel fiber confined concrete, and proposed that the crack strength of steel fiber reinforced concrete is determined by the average spacing of steel fibers which plays an effective role in tensile stress (the theory of fiber spacing), thus starting the practical development stage of this new composite material. Up to now, with the popularization and application of steel fiber reinforced concrete, there are four main types of fiber in concrete: steel fiber reinforced concrete, hybrid fiber reinforced concrete, layered steel fiber reinforced concrete and layered hybrid fiber reinforced concrete.
Fiber reinforced concrete (FRC) is short for fiber reinforced concrete (FRC). It is usually a kind of cement-based composite material, which is composed of metal fibers, inorganic fibers or organic fibers reinforced with cement paste, mortar or concrete as the matrix. It is a new kind of building material, which distributes short and thin fibers with high tensile strength, high ultimate elongation and high alkali resistance evenly in concrete matrix. Fiber in concrete can limit the occurrence of early cracks and the further expansion of cracks under external forces, effectively overcome the inherent defects of concrete such as low tensile strength, easy cracking, poor fatigue resistance, and can greatly improve the impermeability, waterproof, frost resistance, reinforcement and other properties of concrete. Fiber reinforced concrete (FRC), especially steel fiber reinforced concrete (SFRC), has attracted more and more attention in academia and engineering field due to its superior performance. In 1907, Soviet expert B. _. HekpocaB began to use metal fiber reinforced concrete; in 1910, H. F. Porter published a research report on short fiber reinforced concrete, suggesting that short steel fibers should be evenly dispersed in concrete to strengthen the matrix material; in 1911, Graham, the United States, mixed steel fibers into ordinary concrete. In 1940s, the United States, Britain, France, Germany, Japan and other countries have done a lot of research on using steel fiber to improve the wear resistance and crack resistance of concrete, steel fiber concrete manufacturing technology, steel fiber shape to improve the bond strength between fiber and concrete matrix; 1963 J.P. Romualdi and G.B. Batson published papers on the mechanism of crack development of steel fiber confined concrete, and proposed that the crack strength of steel fiber reinforced concrete is determined by the average spacing of steel fibers which plays an effective role in tensile stress (the theory of fiber spacing), thus starting the practical development stage of this new composite material. Up to now, with the popularization and application of steel fiber reinforced concrete, there are four main types of fiber in concrete: steel fiber reinforced concrete, hybrid fiber reinforced concrete, layered steel fiber reinforced concrete and layered hybrid fiber reinforced concrete.
