温拌沥青混合料配合比设计及施工工艺研究

Study on Mix Proportion Design and Construction Technology of Warm Mix Asphalt Mixture

为进一步完善温拌沥青混合料配合比设计理论,评价其路用性能,推广温拌沥青混合料的工程应用,论文基于室内试验通过马歇尔试验法,进行温拌沥青混合料配合比设计,确定AC-16温拌沥青混合料最佳沥青用量为5.4%,击实温度相较于热拌沥青混合料降低20℃~30℃。通过轮辙试验、低温小梁弯曲试验、冻融劈裂试验评价温拌沥青混合料路用性能,研究表明其高温稳定性、低温抗裂性和水稳定性均满足相关规范要求。依托试验路的铺筑,进行温拌沥青混合料施工工艺研究,提出其施工质量控制措施,为温拌沥青混合料的推广应用提供技术支撑。

In order to further improve the design theory of mix ratio of warm-mixed asphalt mixture, evaluate its road performance, and promote the engineering application of warm-mixed asphalt mixture, based on the laboratory test, the mix proportion design of the warm-mixed asphalt mixture was conducted by the Marshall compaction method, and the optimal asphalt content of AC-16 warm- mixed asphalt mixture was determined to be 5.4%, and the compaction temperature is 20˚C ~30˚C lower than that of hot mix asphalt mixture. The road performance of the warm-mixed asphalt mixture was evaluated through the rut test, low-temperature trabecular bending test, and freeze-thaw splitting test. Studies have shown that the high-temperature stability, low-temperature crack resistance, and water stability meet the relevant specifications. Relying on the paving of the test road, the construction technology of warm-mixed asphalt mixture was studied, and its construction quality control measures were proposed, which provided technical support for the promotion and application of warm-mixed asphalt mixture.