钢纤维对混凝土物理力学性能及耐久性研究综述

Review of Research on Physical Mechanical Properties and Durability of Concrete by Steel Fiber

素混凝土结构由于延性不足,受压区混凝土易被压碎而使结构提前失效,所以在素混凝土结构受压区采用钢纤维混凝土(Steel Fiber Reinforced Concrete, SFRC)替代素混凝土,合理利用钢纤维粘结的作用,非常有效地控制了混凝土裂缝的产生和发展。所以,钢纤维混凝土力学性能的研究对推广钢纤维混凝土结构的应用具有非常重要的意义。本文对钢纤维混凝土国内外研究现状和发展趋势做了相关陈述,对于不同掺量的钢纤维对混凝土力学性能的影响进行了讨论,得到比较合适的钢纤维掺量,对钢纤维的长度、长径比对混凝土的影响进行了探讨,得到较合适的钢纤维长度和长径比,对钢纤维分散、定向对混凝土的影响进行了研究,找到比较合适的钢纤维取向。深入探讨了钢纤维对混凝土耐久性性能的影响。

Due to the insufficient ductility of plain concrete structure, the concrete in the compression zone is easy to be crushed and the structure fails in advance. Therefore, Steel Fiber Reinforced Concrete (SFRC) is used to replace plain concrete in the compression zone of plain concrete structure, and the bonding effect of steel fiber is rationally utilized. It is very effective to control the generation and development of concrete cracks. Therefore, the study of the mechanical properties of steel fiber-reinforced concrete is very important to popularize the application of steel fiber-reinforced concrete structures. In this paper, the research status and development trend of steel fiber coagulation at home and abroad are stated. The influence of different dosages of steel fiber on the mechanical properties of concrete is discussed and the appropriate dosage of steel fiber is obtained. The influence of the length and length-diameter ratio of steel fiber on concrete is discussed and the appropriate length and length-diameter ratio of steel fiber is obtained. The influence of steel fiber dispersion and orientation on concrete is studied and the suitable orientation of steel fiber is found. The influence of steel fibers on the durability performance of concrete is explored in depth.