This paper deals with the effect of basalt fibres on fracture toughness of asphalt mixture. For this purpose, basalt fibres with three different contents (i.e., 0.1%, 0.2%, and 0.3% by weight of asphalt mixture) and lengths (ie, 4, 8, and 12 mm) are incorporated into asphalt mixture to prepare fibre‐reinforced asphalt mixtures. Fracture tests are then carried out on these mixtures under four different modes of loading (i.e., pure mode I, pure mode II, and two mixed modes of I/II) using semicircular bend (SCB) specimens. The results exhibit that the fracture toughness increases with the enhancement of the fibre content. In addition, increase in the length of basalt fibre results in reduction of the fracture toughness of asphalt mixture. However, the asphalt mixture containing 0.3% of basalt fibres with the length of 4 mm shows the highest fracture toughness compared with other mixtures. It is also found that the basalt fibre improves mode I fracture toughness of asphalt mixtures more significantly than mode II one. Statistical analysis is also performed on the experimental data. Analysis of ANOVA demonstrates that all the three factors investigated in this study (i.e., length of basalt fibre, content of basalt fibre, and mode of loading) have significant influence on the fracture toughness of asphalt mixtures.

中文翻译：

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玄武岩纤维对沥青混合料断裂韧性的影响

本文研究了玄武岩纤维对沥青混合料断裂韧性的影响。为此，将具有三种不同含量（即沥青混合物重量的0.1％，0.2％和0.3％）和长度（即4、8和12 mm）的玄武岩纤维掺入沥青混合物中，以制备纤维-增强沥青混合料。然后，使用半圆弯曲（SCB）样品在四种不同的加载模式（即纯模式I，纯模式II和I / II的两种混合模式）下对这些混合物进行断裂测试。结果表明，断裂韧性随着纤维含量的增加而增加。另外，玄武岩纤维长度的增加导致沥青混合物的断裂韧性降低。但是，沥青混合料含0。与其他混合物相比，3％长度为4 mm的玄武岩纤维显示出最高的断裂韧性。还发现玄武岩纤维比模式II更好地改善了沥青混合料的模式I断裂韧性。还对实验数据进行统计分析。方差分析的分析表明，在这项研究中研究的所有三个因素（即玄武岩纤维的长度，玄武岩纤维的含量和加载方式）均对沥青混合料的断裂韧性产生重大影响。