养生条件对沥青混合料稳定度的影响

文章编号:(201603-0001-05

养生条件对沥青混合料稳定度的影响

许晗彬1,宋  2延西利3,李  3

1.四川仁沐新高速公路有限责任公司,四川成都  6100412.四川广巴高速公路有限责任公司,

四川成都  6100413.长安大学 公路学院,陕西 西安  710064

  要:为了研究养生温度和养生龄期对沥青混合料稳定度的影响,试验选用了70#基质沥青、SBS改性沥青和ACMP1温拌沥青,制备了AC-13C型沥青混合料,对试件在不同温度和不同龄期的组合条件下进行了养生,测试了马歇尔稳定度和车辙动稳定度。结果表明,养生条件不对基质沥青混合料的稳定度产生影响,但对广义概念上的改性沥青混合料(温拌沥青,SBS改性沥青)产生影响;改性沥青混合料的马歇尔稳定度和车辙动稳定度随养生龄期的延长或养生温度的升高而提高,并逐渐趋于稳定值,且养生龄期的影响作用比养生温度要更重要一些。

关键词:道路工程沥青混合料马歇尔稳定度车辙动稳定度养生温度养生龄期

中图分类号U414          文献标识码A

Influence of Curing Condition on Stability of Asphalt Mixture

XU Han-bin1SONG Le2YAN Xi-li 3LI Jun3

1. Sichuan Ren-mu-xin Motorway Co. LtdChengdu 610041China2. Sichuan Guang-ba Motorway Co. LtdChengdu 610041China3. School of Highway, Chang’an UniversityXi'an 710064China

AbstractIn order to study the effect of curing conditiontemperature and ageon the stability of asphalt mixture, 3 kinds of bitumen such as 70# classical bitumen, SBS modified bitumen and ACMP1 warm bitumen were applied to make a type of asphalt mixture AC-13C, and the Marshall stability and rutting dynamic stability were measured in laboratory after curing the samples in different ages and in different temperatures. The research showed that Marshall stability and rutting dynamic stability of 70# bituminous mixtures were not affected by the curing condition,but the general modified bituminous mixturesSBS modified bitumen and ACMP1 warm mix bitumenwere significantly affected, the Marshall stability and rutting dynamic stability of general modified bituminous mixtures increased with the curing age or the curing temperature and gradually tended to some stable value. The influence of curing age is more important than the curing temperature.

Key wordsroad engineeringasphalt mixturemarshall stabilityrutting dynamic stabilitycuring temperaturecuring age