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首页> 外文会议>Transportation Association of Canada conference exhibition on transportation: past, present, future >PREDICTING THE DURABILITY OF WARM MIX ASPHALT
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PREDICTING THE DURABILITY OF WARM MIX ASPHALT

机译：预测温暖混合沥青的耐用性

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Hot Mix Asphalt (HMA) has been the world's main type of paving material. In the last 10 to 15 years the asphalt industry has recognised the importance of sustainability and the need for new innovative materials. The introduction of warm mix asphalt (WMA) technologies allow asphalt production and compaction temperatures to be reduced. However the issue of their longer term durability has been unknown. This investigation considered the development of a new approach to predicting the durability of WMA based on simulated trafficking and 3D modelling. Roller compacted SMA14 test specimens were prepared using 4 WMA additives and compared with a WMA control containing no additive and a conventional HMA. The test specimens were subjected to simulated accelerated trafficking using modified Wessex immersion wheel track test equipment. This had been fitted with a pneumatic tyre and modified so the tyre is dragged across the test specimen in one direction. This causes the surface to eventually ravel and breakup. 3D models of the test specimen before and after simulated trafficking were made using a hand held ZScanner 800 3D laser. Changes in the 3D models were analysed using DigitalSurf MountainsMap6 Premium software. In developing this test method it was found that test temperature and compaction were important factors in causing the asphalt mix surface to ravel. After testing at 30°C it was concluded that addition of the 4 additives used did not detrimentally affect the durability of WMA SMA14 asphalt mixes in comparison to the HMA control. Based on the findings of this test method it is concluded that if properly compacted, the use of additives will result in warm mix SMA that is comparable to hot mix SMA in terms of aspects of durability assessed.
机译：热拌沥青（HMA）已经成为世界上主要的铺路材料。在过去的10到15年中，沥青行业已经认识到可持续性的重要性以及对新型创新材料的需求。引入热拌沥青（WMA）技术可以降低沥青的产量和压实温度。然而，它们的长期耐用性的问题尚不清楚。这项调查考虑了基于模拟广告投放管理和3D建模的WMA持久性预测新方法的开发。使用4种WMA添加剂制备压实的SMA14辊压试样，并与不含添加剂和常规HMA的WMA对照进行比较。使用改良的Wessex浸入式轮迹测试设备对试样进行模拟的加速运输。该轮胎已装有充气轮胎并经过改装，因此轮胎沿一个方向拖过测试样品。这会导致表面最终破裂并破裂。使用手持式ZScanner 800 3D激光在模拟运输之前和之后制作了测试样品的3D模型。使用DigitalSurf MountainsMap6 Premium软件分析了3D模型中的变化。在开发该测试方法时，发现测试温度和压实度是导致沥青混合料表面松散的重要因素。在30°C下进行测试后，得出的结论是，与HMA对照相比，添加4种添加剂不会对WMA SMA14沥青混合料的耐久性产生不利影响。根据该测试方法的结论，可以得出结论，如果将其适当压实，则在评估耐久性方面，可产生与热拌SMA相当的温拌SMA。

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