The aim of the present study was to explore the effect of basalt fibers on the cracking resistance of microbond asphalt macadam and reduce the occurrence of cracks in asphalt pavements with semirigid base. To this end, compressive resilient modulus tests, rutting tests, and semicircular bending tests were conducted on microbond asphalt macadam with different fiber contents, and the change trends of the compressive resilient modulus, dynamic stability, and flexibility index (FI) with fiber content were revealed. According to the results of this study, the addition of basalt fibers affected the compressive resilient modulus, dynamic stability, and FI of microbond asphalt macadam significantly. With the increase of fiber content, the compressive resilient modulus, dynamic stability, and FI presented a uniform trend of increasing first and decreasing afterwards. When the fiber content was 0.4%, various indices reached their maximum values, suggesting that the cracking resistance of the basalt fiber-reinforced microbond asphalt macadam was optimal under this content. This study is of great significance for the application and promotion of basalt fiber-reinforced microbond asphalt macadam.

中文翻译：

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玄武岩纤维增强微粘结沥青碎石的抗裂性研究

本研究的目的是探讨玄武岩纤维对微粘结沥青碎石抗裂性的影响，并减少半刚性基层沥青路面裂缝的发生。为此，对纤维含量不同的微粘结沥青碎石进行了压缩弹性模量试验，车辙试验和半圆弯曲试验，随着纤维含量的变化，压缩弹性模量，动态稳定性和柔韧性指数（FI）的变化趋势为：揭示。根据这项研究的结果，玄武岩纤维的添加显着影响了微粘结沥青碎石的压缩弹性模量，动态稳定性和FI。随着纤维含量的增加，压缩弹性模量，动态稳定性，FI呈现先上升后下降的统一趋势。当纤维含量为0.4％时，各种指标均达到最大值，这表明在该含量下玄武岩纤维增强的微粘结沥青碎石的抗裂性最佳。该研究对玄武岩纤维增强微粘结沥青碎石的应用和推广具有重要意义。