| 摘要: |
| 为研究矿料表面能参数对沥青混合料劈裂强度的影响，首先基于表面能理论对沥青矿料黏附原理进行阐释；然后测定不同岩性矿料（石灰岩、玄武岩、花岗岩、安山岩和片麻岩）与已知表面能参数滴定液体的接触角，由接触角求得不同矿料的表面能、极性分量和色散分量，分析矿料各参数与沥青混合料劈裂强度的关系.结果表明：表面能理论可较好解释沥青混合料劈裂强度的形成；不同岩性矿料的沥青混合料劈裂强度与矿料表面能、色散分量呈正相关关系，与矿料极性分量呈负相关关系；矿料表面能参数与其化学组成存在一定关系. |
| 关键词: 道路工程 沥青混合料 试验研究 矿料表面能 劈裂强度 |
| DOI：103969/j.issn1007 9629201604030 |
| 分类号: |
| 基金项目:山西省交通厅科技项目（2013 1 1） |
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| Effect of Aggregate Surface Energy Parameters on Splitting Strength of Asphalt Mixture |
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CHENG Zhiqiang1, KONG Fansheng2
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1.Institute of Highway & Transportation Engineering, Shanxi Transportation Research Institute, Taiyuan 030006, China;2.Transportation Key Laboratory of Road Construction and Maintenance Technology of Loess Area, Shanxi Transportation Research Institute, Taiyuan 030006, China
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| Abstract: |
| In order to observe the effect of aggregate surface energy parameters on splitting strength of asphalt mixture, the adhesion principle between asphalt and aggregate was applied based on the theory of surface energy. The contact angles were measured between different aggregates （i.e. limestone, basalt, granite, andesite and gneiss） and chemical reagents of which the surface energy parameters were known. Parameters of surface energy, polar component, dispersion component of different aggregates were obtained by calculating the contact angles. The relationships between each parameter and splitting strength of asphalt mixture were analyzed. The results show that the splitting strength of asphalt mixture could be explained by theory of surface energy. Surface energy, dispersion component of aggregate and splitting strength is positively correlated, while polar component is negatively correlated. Some relationships between parameters of surface energy of aggregates and chemical compositions are established. |
| Key words: road engineering asphalt mixture experimental research surface energy of aggregate splitting strength |
