Study of Water Stability of Different Asphalt Mixtures for Ultra-Thin Surfacing Layer

doi:10.3969/j.issn.1674-0696.2016.02.10

Abstract

Abstract: By performing immersion rutting test and freeze-thaw splitting test, the water stability of nine different asphalt mixtures for ultra-thin surfacing layer was studied. The said nine asphalt mixtures were made respectively by three gradations (namely Type-B with USA gradation, improved SMA-10 and OGFC-10) and with three binders (namely SBS modified asphalt, common asphalt + 8% anti-rutting agent and highly viscoelastic asphalt). The test results show that five types of asphalt mixture for ultra-thin surfacing layer (namely Type-B SBS modified asphalt mixture, improved SMA-10 SBS modified asphalt mixture , Type-B highly viscoelastic asphalt mixture, improved SMA-10 highly viscoelastic asphalt mixture and OGFC-10 highly viscoelastic asphalt mixture ) meet China’s prevailing specification for water stability of asphalt mixtures.Among them the improved SMA-10 highly viscoelastic asphalt mixture demonstrated optimal general performance with both rut dynamic stability and the immersion rutting dynamic stability 2.0~4.5 times and 2.0~4.7 times that of other eight mixtures and is thus recommended for use in pavement protective maintenance or repair of key urban artery, expressway or road of heavy traffic.

Key words: road engineering, ultra-thin layer asphalt mixture, water stability, water immersion rutting test, freeze-thaw splitting test

摘要： 采用浸水车辙试验和冻融劈裂试验分别评价了Type-B(美国级配)、改良型SMA-10、OGFC-10 这3种级配和SBS改性沥青、普通沥青+8%抗车辙剂和高黏弹沥青3种结合料组成的9种超薄层沥青混合料的水稳定性。试验结果表明：有5种超薄层沥青混合料，即Type-B SBS改性沥青混合料、改良型SMA-10 SBS改性沥青混合料、Type-B高黏弹沥青混合料、改良型SMA-10高黏弹沥青和OGFC-10高黏弹沥青混合料满足现有规范对水稳定性的要求，其中改良型SMA-10高黏弹沥青混合料的综合性能最优，其条件前后的车辙动稳定度不仅分别是其他8种混合料的2.0～4.5倍和2.0～4.7倍。推荐该混合料用于重要的城市主干道、高速公路或重交通道路路面的预防性养护或维修。

关键词: 道路工程, 超薄层沥青混合料, 水稳定性, 浸水车辙试验, 冻融劈裂试验

CLC Number:

U416.217

SU Zhonggao. Study of Water Stability of Different Asphalt Mixtures for Ultra-Thin Surfacing Layer[J]. Journal of Chongqing Jiaotong University(Natural Science), 2016, 35(2): 40-44.

苏忠高. 不同类型超薄层沥青混合料的水稳定性研究[J]. 重庆交通大学学报（自然科学版）, 2016, 35(2): 40-44.

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