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混凝土中掺入钢纤维
[来源:http://www.hcxtsg.com] [作者:567zx] [日期:19-05-30] [浏览次数:]

钢纤维混凝土是在混凝土中掺入钢纤维而改善性能的复合材料。它具有普通钢筋混凝土所没有的许多优良品质:如抗拉强度、抗弯强度、抗裂强度、韧性或抗冲击性能都可获得改善。 Steel fiber reinforced concrete is mixed with steel fiber in concrete and improve the performance of composite materials. It has a lot of ordinary reinforced concrete have no good quality, such as tensile strength, bending strength and crack resistance strength, toughness and shock resistance can be improve. 混凝土的缺点之一是抗拉强度甚小,仅为1.5~3.0MPa,而钢材则可达到400~1000MPa;混凝土的第二个缺点是抗拉断裂应变值很小,在10-4间,而钢材则在10-1间;混凝土的第三个缺点是因以上两个缺点的结果,及混凝土呈脆性,能量吸收小,抗冲击性能差,易发生裂缝。由于混凝土本质上的缺陷,使混凝土这种廉价材料在某些领域应用受到限制。钢纤维的出现使混凝土的这些缺陷得到大大改善,也使混凝土的某些性能指标改变数倍之多。 One disadvantage of concrete is the tensile strength is very small, only 1.5 ~ 3.0 MPa, while steel can reach 400 ~ 1000 MPa; A second drawback of a concrete is tensile strain value is very small, between 10-4, while steel between 10-1; Concrete of the third disadvantage is that because of the drawback of the above two results, and the concrete is brittle, small energy absorption, shock resistance is poor, prone to fracture. Due to the defects of concrete in nature, makes concrete the cheap material application in some fields is restricted. The defects of the appearance of the steel fiber reinforced concrete have been improved greatly, and makes concrete some performance index change several times as much. 1911年至1933年间,美、英、法等国有人相继建议在混凝土中掺加钢纤维以改善性能。四十年代至五十年代意大利人发明了钢丝网水泥,实际上即为连续钢纤维增强混凝土。六十年代,美国研制成功熔钢抽丝法工艺生产钢纤维,致使钢纤维成本大降,这就为钢纤维混凝土的广泛应用铺平了道路。七十年代,超塑化学外加剂的产生,使钢纤维混凝土的质量和施工性能得到了显著改善。八十年代,国际上先后研制出一些新型钢纤维品种,这种纤维除考虑钢纤维在混凝土中增强作用外,还考虑了钢纤维应具备良好的施工性能。 Between 1911 and 1933, the United States, Britain, France and other state-owned people have suggested that adding steel fiber in concrete to improve performance. Italians invented the '40 s to 50 s ferrocement, actually is the continuous steel fiber reinforced concrete. The sixties, the successful development of molten steel reel off raw silk from cocoons production method of steel fiber, the steel fiber cost down, this is paving the way for the widely application of the steel fiber reinforced concrete. In the seventy s, the superplasticity of chemical admixtures produce, make the quality of the steel fiber reinforced concrete and construction performance is significantly improved. In the eighty s, the world has developed some new varieties of steel fibers, the fiber besides considering steel fiber enhanced role in concrete, considered both the steel fiber should possess good construction performance.

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