共查询到17条相似文献,搜索用时 62 毫秒
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温拌沥青混合料技术综述 总被引:8,自引:3,他引:5
在全球对环境和能源保护要求越来越高的前提下,温拌沥青混合料技术已经成为公路界重点关注的沥青路面铺筑技术之一。综述了温拌沥青混合料技术研究现状、温拌沥青混合料优点、制备技术等,分析了温拌技术在我国的应用前景,最后指出该技术整体上尚处于试验研究阶段,有必要深入开展研究。 相似文献
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通过介绍美国13位材料专家对温拌沥青混合料(WMA)技术在欧洲应用的主要考察成果,针对材料选择、混合料的设计和施工,阐述了WMA在欧洲的应用情况和实践经验,为日后国内WMA的应用提供参考. 相似文献
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SAK温拌沥青混合料压实性能分析 总被引:1,自引:0,他引:1
采用方差分析法研究影响SAK温拌沥青混合料压实性能的主要因素,在相同级配的条件下,压实温度和压实次数对温拌沥青混合料的压实性能影响最大。借助密实度能量指数概念,对温拌沥青混合料的压实性能予以评价,并且初步确定了温拌沥青混合料的拌和温度与碾压温度。 相似文献
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掺加含水沸石是中温化技术的一种。研究了掺加含水沸石后降低拌和及成型温度对沥青混合料的空隙率及其它路用性能的影响。通过试验得知,添加含水沸石后降低拌和及成型温度对混合料的空隙率及性能基本没有影响。从而通过添加含水沸石降低混合料的拌和及成型温度是可行的。并对添加含水沸石的中温沥青混合料进行了经济分析。 相似文献
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两种温拌混合料添加剂性能室内试验比较 总被引:1,自引:0,他引:1
比较了两种广泛使用的温拌沥青结合料添加剂加入PG 64—22及PG 70—28沥青后结合料的流变学特性。研究表明无论对于PG 64—22还是PG 70—28,Sasobit都可降低混合料的生产温度,且在未增加结合料粘度的前提下提高了其高温等级,从而提高混合料的高温性能。相比较而言,Aspha—Min的降粘效果不显著。 相似文献
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The scope of this study was to investigate the high and intermediate temperature rheological and aging properties of warm mix asphalt binders modified by organo-expanded vermiculites. The rotational viscosity, complex modulus, and rutting parameter (G*/δ) increased and the penetration and phase angle decreased after modification of 3% organo-expanded vermiculites, indicating that the high temperature rheological properties of the warm mix asphalt binder have been improved. The warm mix asphalt binders containing 3% organo-expanded vermiculites demonstrate the lowest value of phase angle and the highest value of complex modulus compared with the studied binders. In addition, as a result of the rolling thin film oven test, the viscosity aging index of warm mix asphalt binder decreases, while the retained penetration increases obviously with the introduction of organo-expanded vermiculites. The warm mix asphalt binder with 3% organo-expanded vermiculites has more pronounced improvements in aging resistance in comparison with other studied modified warm mix asphalt binders. 相似文献
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In this research, the influence of warm mix additives on the properties of warm-mix asphalt (WMA) containing recycled asphalt pavement (RAP) was investigated and compared with the same graded hot-mix asphalt (HMA). WMA mixtures were produced using Sasobit and Zycotherm as organic and chemical WMA additives, respectively. Mixtures were prepared containing RAP in different proportions (0%, 25%, 50% and 75 % of total aggregates). Dynamic creep and wheel track tests were used to investigate the resistance of specimens to permanent deformation. Zycothem WMA mixtures showed less resilient modulus and rutting resistance than Sasobit WMA mixtures. It was also concluded that increasing the amount of RAP in mixtures improves resilient modulus and rutting resistance of all mixtures. 相似文献