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针对纤维掺入沥青胶浆对其高低温性能产生的影响,通过重复蠕变恢复试验、多应力蠕变恢复试验及弯曲蠕变劲度试验系统的研究,分析了纤维掺量、温度、应力水平及纤维种类等因素的影响结果。研究表明:1掺入纤维能提高胶浆的高低温性能,其性能提升与纤维掺量成正比,同时对温度较敏感,温度升高使胶浆累积应变及其速率增大;2应力水平对纤维胶浆高温性能影响较大,随应力增大,胶浆恢复率R降低,不可恢复蠕变柔量Jnr增大。在较高应力水平下,纤维对胶浆R值提高和Jnr值降低显著,其中玄武岩纤维最佳,聚酯纤维次之,而改性沥青最小。
Aiming at the influence of fiber mixed with asphalt mortar on its high and low temperature performance, through repeated creep recovery test, multi-stress creep recovery test and flexural creep stiffness test system, the effects of fiber content, temperature, stress level And fiber types and other factors of the results. The results show that: 1 the fiber incorporation can improve the high and low temperature properties of the mortar, the performance improvement is proportional to the fiber content, while being more sensitive to temperature, the temperature increases the cumulative strain and increase the rate of mortar; 2 stress level The high temperature performance of the fiber cement had a great effect. With the increase of the stress, the recovery R of the mortar decreased and the non-recoverable creep compliance Jnr increased. At higher stress level, the fibers increased the value of R and decreased the value of Jnr. The basalt fiber was the best, the polyester fiber was the second, and the modified bitumen was the smallest.