半柔性路面的配比优化设计是其力学性能表现良好的先决条件。本文采用体积法对基体沥青混合进行配比优化，以灌浆材料的力学特性为评价指标并采用正交试验法对配比进行优化，此外通过自行研制的灌浆设备对半柔性路面进行制备，对低温性能进行评价。结果表明，该基体沥青混合料最佳油石比为4.3%，空隙率和连通孔隙率分别为25.45和23.18，满足灌注要求；以初始流动度、30min流动度、泌水率、7d抗折强度、7d抗压强度为评价指标，获取该灌浆材料的最优水胶比及砂胶比分别为0.46和0.15。自行研制的灌浆设备可对灌浆材料进行有效灌注，灌注率满足要求。力学性能测试表明，该半柔性路面具备良好的低温性能及水稳定性。

The optimal ratio design of semi flexible pavement is a prerequisite for its good mechanical performance. In this paper, the volume method is used to optimize the ratio design of the base asphalt mixture. Then, using the mechanical properties of the grouting material as the evaluation indicator, the orthogonal experimental method is used to optimize the design of its ratio. In addition, semi flexible road surfaces are prepared using self-developed grouting equipment, and its low-temperature performance is evaluated. The results show that the optimal asphalt to aggregate ratio of the matrix asphalt mixture is 4.3%, with porosity and connected porosity of 25.45 and 23.18, respectively, meeting the requirements for grouting. Using initial flowability, 30 minute flowability, bleeding rate, 7-day flexural strength, and 7-day compressive strength as evaluation indicators, the optimal water cement ratio and sand cement ratio of the grouting material are obtained as 0.46 and 0.15, respectively. The self-developed grouting equipment can effectively inject grouting materials with a grouting rate that meets the requirements. The mechanical performance test results show that the semi flexible pavement has good low-temperature performance and water stability.

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甘肃省交通厅科技项目（JTKYHT-08）；甘肃省公路交通建设集团科技项目（GJJ-ZH-2023-062）；兰州市科技计划项目（2022-5-47）