摘要
玄武岩纤维混凝土(BFRC)是近年来在土木工程领域应用日益广泛的复合材料之一,复合材料的宏观力学性能受到其内部微观结构影响。当前BFRC宏观弹性模量和抗压强度通常是通过试验获得,但试验时间周期长且花费成本高。本文运用Mori-Tanaka均匀化理论对玄武岩纤维混凝土的弹性模量和抗压强度进行了分析。结果表明,预测所得的弹性模量和抗压强度与试验结果吻合较好,证明此方法具有较高的准确性和可靠性。分析发现,当纤维掺量为0%-0.25%时,增加纤维掺量可以提高玄武岩纤维混凝土的弹性模量和抗压强度;纤维结团会降低玄武岩纤维混凝土的性能,但影响程度非常小,相比较而言纤维掺量的影响较大;基体强度是影响抗压强度最显著的因素。均匀化方法可以快捷、准确地预测玄武岩纤维混凝土宏观力学性能,对推广玄武岩纤维混凝土在实际工程中的应用有很强的参考价值。
Basalt fiber reinforced concrete(BFRC)is one of the composite materials used in the field of Construction Engineering in recent years.The macro mechanical properties of the composite materials are affected by its internal microstructure.At present,the elastic modulus and compressive strength of BFRC are usually obtained by experiments,but the test time is long and the cost is high.In this paper,the elastic modulus and compressive strength of BFRC are analyzed by Mori-Tanaka homogenization method.The results show that the elastic modulus and compressive strength predicted by the homogenization method are basically consistent with the experimental values,which proves that this method has high reliability.it is found that when the fiber content is 0%-0.25%,the increase of fiber content can improve the elastic modulus and compressive strength of BFRC;fiber agglomeration can reduce the performance of BFRC,but the influence degree is very small,comparatively speaking,the influence of fiber content is greater;matrix strength is the most significant factor affecting the compressive strength.Homogenization method can quickly obtain the properties of BFRC,which is time-saving,labor-saving and convenient.It is of great significance to promote the application of basalt fiber concrete in practical engineering.
出处
《科学技术创新》
2021年第14期156-159,共4页
Scientific and Technological Innovation
基金
新疆大学大学生创新训练计划资助(202010755017)。
