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首页> 外文期刊>The international journal of pavement engineering >Influence of warm mix additive and loading rate on rutting of warm mix asphalt pavement
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Influence of warm mix additive and loading rate on rutting of warm mix asphalt pavement

机译：温拌料和掺量对温拌沥青路面车辙的影响。

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Two major types of warm mix asphalt (WMA) technologies exists and they are wax-based and chemical-based. The wax-based additive melt completely in the binder at the mixing and compaction temperatures and hence enable construction at lower temperature. The chemical-based additives facilitate similar results during construction, however, by reducing the friction between the aggregates and binders. As it is well known, WMA technologies exhibit tendencies for increased rutting due to reduced ageing during construction, however, the wax-based additives exhibit better performance in laboratory trials since at pavement service temperatures, the wax crystallise and provide increased stiffness to the mastic. The presence of the wax and the associated temperature sensitive properties (crystallisation and melting) influence the viscoelastic response of the WMA at pavement service temperatures. This investigation focuses on such issues for one wax-based additive and one chemical-based additive along with a control hot mix asphalt (HMA) binder. This paper presents three important results. In the first, the rheological response of the binders are characterised and in the second the rutting and the mechanical properties of mixtures are quantified. It was seen that bituminous mixture with wax-based additives exhibited better rutting resistance characteristic at temperature below 40 C, identical response in the temperature range of 40-50 C and more prone to rutting at the temperature above 50 C when compared to HMA mixture. It was also seen that WMA mixture with chemical additives consistently exhibited higher rutting. Taking into account the temperature sensitive response of WMA, the final result relates to simulation for rut resistance for pavements constructed with WMA mixtures for 16 different locations in India.
机译：存在两种主要类型的温拌沥青（WMA）技术，它们是基于蜡的和基于化学的。蜡基添加剂在混合和压实温度下完全熔化在粘合剂中，因此可以在较低的温度下施工。基于化学的添加剂可通过减少骨料和粘合剂之间的摩擦，在施工过程中促进相似的结果。众所周知，WMA技术由于减少了施工过程中的老化而显示出增加车辙的趋势，但是，蜡基添加剂在实验室试验中表现出更好的性能，因为在路面使用温度下，蜡会结晶并为乳胶提供更高的硬度。蜡的存在和相关的温度敏感性（结晶和熔化）会影响WMA在路面使用温度下的粘弹性响应。这项研究集中于一种蜡基添加剂和一种化学基添加剂以及对照热拌沥青（HMA）粘合剂的此类问题。本文提出了三个重要的结果。首先，表征粘合剂的流变响应，其次，量化混合物的车辙和机械性能。可以看出，与HMA混合物相比，具有蜡基添加剂的沥青混合物在低于40℃的温度下表现出更好的耐车辙性，在40-50℃的温度范围内具有相同的响应，并且在高于50℃的温度下更易于发生车辙。还可以看出，WMA与化学添加剂的混合物始终显示出较高的车辙。考虑到WMA对温度的敏感响应，最终结果与在印度16个不同位置使用WMA混合物建造的路面的车辙阻力的模拟有关。

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