纤维煤矸石骨料混凝土力学性能研究进展

A Review of Mechanical Properties of Fiber Gangue Aggregate Concrete

摘要: 作为煤炭开采与加工活动的副产品，煤矸石在中国境内的再利用率相对较低。通过一系列处理步骤，如破碎和筛分，将这种废弃物转化为适用于混凝土制造的骨料已经成为一种有效的资源回收策略。然而，由于煤矸石自身的强度普遍低于传统使用的天然骨料，其在混凝土中的比例越高，往往会导致最终材料的抗压能力下降。为了克服这一局限性，研究者们探索了通过添加各种纤维来增强基于煤矸石的混凝土结构性能的方法。不同种类的纤维对于改善混凝土各项力学指标(包括但不限于抗压、劈裂抗拉及弯曲强度)的效果各异。本综述旨在概述煤矸石的基本物理化学特征，并讨论不同类型纤维对提升此类特殊混凝土性能的作用机制，为未来相关领域的深入探究奠定基础。

Abstract: Coal gangue is the waste produced in the process of coal mining and processing in China, and the comprehensive utilization rate is low. The gangue through crushing, screening and other processes into aggregates that meet the requirements of concrete, and then mixed into the concrete has become the main way of resource utilization. The strength of gangue is usually lower than that of natural aggregates, so with the increase of gangue substitution rate, the compressive strength of concrete tends to decrease. In order to improve the mechanical properties of gangue concrete, fibers are usually added to enhance its compressive strength. Different types of fibers have different effects on the compressive strength of concrete. Therefore, this paper introduces the physicochemical properties of gangue and summarizes the effects of fibers on the compressive strength, splitting tensile strength and flexural strength of gangue concrete, to provide reference for future research on fiber gangue concrete.