长期老化 meaning in Chinese

long-term aging

The results showed that the gradation , which designed by volumetric methods , has perfect water - stability and other pavement performance also can meet the demands of expressway . by integrating compaction capacity and pavement performances , the optimal ratio of the structural layer thickness to the maximum particle - size is 2 . 5 . the water resistance of the mixture added amine type anti - stripping agent attenuates severely after long - term aging , but the mixture added hydrated lime not only can improve obviously the capacity of water resistance , but also has perfect long - term pavement performance
研究结果表明，采用体积法设计的级配不仅具有较好的水稳定性而且其它路用性能均满足高速公路面层的要求；综合考虑压实性能及路用性能，提出了沥青路面表面层结构层厚度与混合料最大粒径的合理比例为2 . 5 ；掺有液体胺类抗剥落剂的沥青混合料经长期老化后其抗水损害能力衰减严重，而掺加消石灰的混合料能显著提高其抗水损害能力，且长期性能较好，是一种优良的抗剥落剂。