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在高速铁路无碴轨道(板式)结构的建设过程中,最为关键的一种材料便是CA砂浆。在本篇文章中,主要针对环境温度(零下20℃～20℃)下,CA砂浆本身的应力水平保持在0.65～0.9的范围内,而实际加载频率大小保持在10Hz,同时针对正弦波加载环境下产生的疲劳特性进行研究。根据实际结果表明,所研究制造的CA砂浆针对素质以及应力水平下其疲劳寿命所显现出的线性相关性较为的良好;对于CA砂浆而言,其本身的抗压强度大小,会因为环境温度的变化而产生较大的波动,在盈利水平保持相同的情况下,CA砂浆本身的疲劳寿命(负温环境)较之常温而言更差一些,而CA砂浆本身的粘弹特性使其在零下20℃的环境下仍然可以保持较为出色的耐疲劳特性。
In the construction of high-speed railway ballastless track (plate) structure, the most crucial material is CA mortar. In this paper, the stress level of CA mortar itself is kept within the range of 0.65-0.9 at ambient temperature (minus 20 ℃ ~ 20 ℃), while the actual loading frequency is kept at 10Hz. Meanwhile, for the sine wave loading environment Under the fatigue characteristics of the study. According to the actual results, it is found that the CA mortar studied has a good linear correlation with the fatigue life under the stress level and the quality of the CA mortar. For the CA mortar, the compressive strength of the CA mortar itself is higher because of the ambient temperature Changes in the larger fluctuations in the profitability of the same circumstances, CA mortar itself fatigue life (negative temperature environment) is worse than at room temperature, and the viscoelastic properties of CA mortar to make it at minus 20 ℃ environment can still maintain a more excellent fatigue resistance.