【作者】 郑蕉林；

【导师】 沙爱民；

【作者基本信息】 长安大学 ， 材料学， 2006， 硕士

【摘要】 填料的用量虽然在沥青混合料中所占比重不大，但其与沥青形成的沥青胶浆却是影响混合料性能的关键。目前我国对填料的研究还没有引起足够的重视，规范对其性质的控制指标比较宽泛，对影响胶浆及混合料性能的关键指标亦不够明确；对于替代矿粉使用的粉煤灰、水泥、矿渣粉、石灰等填料对沥青混合料性能的改善效果及机理缺乏系统的研究。 针对以上问题，本文在借鉴国内外相关研究成果的基础上，对两种石灰岩矿粉、粉煤灰、水泥、矿渣粉及石灰等填料进行了系统的研究。本文首先全面测定、分析了填料的物理和化学性质，总结出各种填料的性质特点；进而借助于super—pave沥青研究的设备DSR、BBR等对胶浆高温、低温及疲劳性能进行系统的研究，评价了不同填料沥青胶浆的性能，并针对影响显著的填料指标进行深入分析；然后对不同粉胶比及填料的沥青混合料性能进行研究，得出了不同填料对沥青混合料性能的改善效果，并针对影响显著的填料指标进行了深入分析；根据表面化学理论分析了填料—沥青的界面现象，并结合填料性质、胶浆及混合料的宏观性能论述了填料与沥青的粘附—剥落机理；最后结合国内实际情况提出影响混合料使用性能的关键性指标，并对规范上的填料评价指标提出建议。更多还原

【Abstract】 The role of the filler in asphalt paving mixtures is quite important when it is combined with asphalt, though the proportion is small. Presently, the significance of it has not been recognized adequately in our country. The control parameters for characters of the fillers in technical specification are too broad, and the key indices that have main effects on the asphalt mortar and mixture are not clear. The comprehensive study on the impact and mechanism of mineral fillers, as fly-ash, Portland cement, slag-powder, hydrated lime and so on, improved asphalt concrete stability is scarce.To solve above-mentioned problem, this paper mainly researches on the fillers such as lime stone fines, fly ash, Portland cement, slag-powder and hydrated lime. Firstly, the physico-chemical characters of them are comprehensive analyzed, and the characteristic of them are summarized. Secondly, the performance in high and low temperature and fatigue of asphalt mortar is studied by using the Superpave equipments such as DSR and BBR. The performance of asphalt mortar composed with different sorts of fillers are estimated and the factors that having prominent influence are analyzed. Thirdly, the performance of asphalt paving mixture composed with different sorts of fillers is researched, and the improve effects of different sorts of fillers are gained. The key indices affecting the asphalt paving mixture are analyzed. Fourthly, the filler-asphalt interface is studied according the surface chemical theory. The adhesion-stripping mechanism is discussed with the performance of fillers, asphalt mortar and paving mixture. Finally this paper put forward the key index of filler that influent the pavement performance of asphalt paving mixture, and give advices about index of filler to the Technical Specification.更多还原