摘要
在沥青的压力老化试验(PAV)中,设计加入水分因子,并采用美国战略性公路研究计划(SHRP)中的高温车辙因子(G*/sinδ)和低温蠕变劲度(S(t))等参数指标,表征在沥青路面使用过程中,雨水、地下水等潮湿因素对沥青老化性状的影响。结果表明,在热、氧的共同作用下,水分的存在对沥青G*/sinδ的影响十分显著。提出了在室内沥青长期老化模拟试验过程中,应考虑加入水分条件,使更接近致使道路沥青老化的使用环境,提高对沥青老化模拟的准确度。另外,从对沥青SHRP高温性能指标的影响程度上讲,水分因子的加入可以缩短沥青压力老化试验时间5h以上。
In order to signify the impacts of rainwater on aging of asphalt during its service life of pavement, the factor of moisture was considered in the pressure aging vessel （PAV）, termed as long-term aging tests to simulate asphalt aging in the service life. The SHRP parameters--rut factor （G^＊/sinδ） and low-temperature strength module （S（t）） were adopted to express the high- and low-temperature properties of the aging asphalt, respectively. With the conjunct action of heating and oxygen, it was found that the existence of moisture in PAV put a notable role on parameter G^＊/sinδ. And then it was proposed that the factor of moisture be added in the PAV test process for improving the accuracy of simulating the service condition of asphalt. The results also showed that duo to the existence of moisture in PAV the trial time could be shortened at least 5h,as only considering its effect on SHRP parameter G^＊/sinδ.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2005年第4期75-78,共4页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家863计划资助项目(2002AA335100)
