| 张立兵,朱月雷,李景春,琚琳,王艳艳,丁益.多孔玄武岩细集料含水状态对沥青混合料水稳定性能影响研究[J].安徽建筑大学学报,2023,31(): |
| 多孔玄武岩细集料含水状态对沥青混合料水稳定性能影响研究 |
| Effect of Water Content State of Porous Basalt Fine Aggregate on Water Stability of Asphalt Mixture |
| 投稿时间：2022-09-08 修订日期：2022-11-15 |
| DOI： |
| 中文关键词: 多孔玄武岩 沥青混合料 水稳定性能 道路工程 |
| 英文关键词: porous basalt bituminous mixture water stability property road engineering |
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| 中文摘要: |
| 多孔玄武岩可以替代其他优质天然集料，在确保路面性能的基础上可以有效地降低高质量的天然集料的使用量，从而达到环保目的。但由于其表面的多孔特性，在用于路面时，其水稳定性能备受关注。本文设计了AC-20沥青混合料，通过马歇尔实验探究得到混合料的最佳沥青含量，并制备出对应级配的沥青混合料，以浸水马歇尔实验得出的残留稳定度和冻融劈裂实验得出的劈裂强度比评定沥青混合料的水稳定性能研究。集料粒径越小，对水的敏感程度越高，越容易吸水-失水，集料含水量对沥青混合料的稳定性影响较大，而水分则会影响沥青与集料之间的黏附情况，从而对混合料的稳定性产生不利影响。SBS改性沥青的混合料要比使用70号石油沥青的混合料水稳定性能要好。在现实道路施工方面，本实验可对制备沥青混合料具有借鉴作用，并为改善玄武岩沥青混合料的水稳性，提供了充分的理论基础。 |
| 英文摘要: |
| Porous basalt can replace other high-quality natural aggregate, which can effectively reduce the use of high-quality natural aggregate on the basis of ensuring the pavement performance, so as to achieve the purpose of environmental protection. However, due to the porous characteristics of its surface, its water stability has attracted much attention when it is used for road surface. In this paper, AC-20 asphalt mixture was designed, and the optimal asphalt content of the mixture was obtained by Marshall experiment, and the corresponding graded asphalt mixture was prepared. The water stability of the asphalt mixture was evaluated by the residual stability obtained by the immersion Marshall experiment and the splitting strength ratio obtained by the freeze-thaw splitting experiment. The smaller the aggregate particle size, the higher the sensitivity to water, and the easier it is to absorb water and lose water. The aggregate water content has a great influence on the stability of asphalt mixture, while the moisture will affect the adhesion between asphalt and aggregate, thus adversely affecting the stability of the mixture. The water stability of SBS modified asphalt mixture is better than that of 70 petroleum asphalt mixture. In practical road construction, this experiment can be used for reference to prepare asphalt mixture, and provide a sufficient theoretical basis for improving the water stability of basalt asphalt mixture. |
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