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首页> 外文期刊>Engineering Fracture Mechanics >Investigation of the low-temperature properties and cracking resistance of fiber-reinforced asphalt concrete using the DIC technique
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Investigation of the low-temperature properties and cracking resistance of fiber-reinforced asphalt concrete using the DIC technique

机译：用DIC技术研究纤维增强沥青混凝土纤维增强沥青混凝土的裂纹性

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摘要

Fibers have been commonly used to enhance the cracking resistance of asphalt mixtures. However, the reinforcing actions of different fibers have presented diverse effects. Therefore, three kinds of fibers, including glass fibers, basalt fibers and steel fibers, were selected to investigate their influences on the low temperature properties and cracking resistance of asphalt mixtures in this paper. Indirect tensile testing (IDT) was conducted to obtain basic properties such as the Poisson's ratio and moduli. The digital image correlation (DIC) technique was employed to measure the deformation and strain. The crack inhibition action was evaluated by the failure time. The results showed that the fiber type has no influence on the Poisson's ratio of the mixture. However, the addition of fibers remarkably affects the mixture modulus. The modulus and ultimate tensile strength of the reinforced mixture decline after the addition of fibers. The gaps between the compressive and tensile moduli are also increased by the addition of fibers. Moreover, the addition of fibers not only substantially improves the mixture ductility but also delays the fracture process. The fiber reinforced asphalt concrete (FRAC) presents a higher fracture energy (FE) and dissipated creep strain energy (DCSE) than that of the control concrete. Among the selected fibers, basalt fibers exhibit optimal crack resistance performance, while steel fibers are not recommended due to their smooth appearance.
机译：纤维通常用于增强沥青混合物的裂化抗性。然而，不同纤维的增强作用呈现不同的效果。因此，选择三种纤维，包括玻璃纤维，玄武器纤维和钢纤维，以研究它们对本文中沥青混合物的低温性能和抗裂性的影响。进行间接拉伸检测（IDT）以获得碱性特性，例如泊松比和模量。使用数字图像相关（DIC）技术来测量变形和菌株。通过失效时间评估裂纹抑制作用。结果表明，纤维类型对泊松的混合物的比例没有影响。然而，添加纤维显着影响混合模量。添加纤维后增强混合物的模量和极限拉伸强度下降。通过添加纤维也增加了压缩和拉伸模胶之间的间隙。此外，添加纤维不仅基本上改善了混合物延展性，而且延迟了裂缝过程。纤维增强沥青混凝土（FRAC）呈现出较高的断裂能量（FE）和耗散的蠕变应变能量（DCSE）比对照混凝土的散热能量（DCSE）呈现。在选定的纤维中，玄武岩纤维表现出最佳的抗裂性能，而由于它们的光滑外观，不建议使用钢纤维。

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