
设计与试验IDESIGNANDTEST 文章编号:1000-033X(2016)07-0064-03
温拌橡胶沥青混合料压实特性研究
亢炜,金娟”
600
摘要:在添加不同掺量Sasobit温择剂的条件下,对温拌和热拌橡胶沥青进行性能指标对比分学指标进行对比分析,确定了温拌橡胶沥青混合料的最佳拌和压实温度,并对该温度下的温拌和热拌橡胶沥青混合料进行了路用性能分析。结果表明:加入Sasobit温拌剂后,橡胶沥青和橡胶沥青
混合料的高温稳定性能得到显著提高,而低温性能有一定程度的降低。关键词:温拌橡胶沥青混合料;Sasobit温拌剂;择和压实温度;路用性能
中图分类号:U214.7
文献标志码:B
Research on Compaction Properties ofWarm Mix Rubberized Asphalt
KANG Wei',JINJuan"
(1. School of Construcetion Machinery, Chang'an University, Xi'an 710064, Shaanxi, China;
2. Shaanxi Railway Institute,Weinan 714099,Shaanxi, China)
Abstract: Mixed with different amounts of Sasobit, the warm mix rubberized asphalt was compared with hot mix asphalt on performance indices, and the optimal mixing amount of Sasobit was determined. Mechanical characteristics of warm mix rubberized asphalt with optimal amount of Sasobit were studied, based on which the optimal temperature for mixing and compaction was determined. The pavement performance of the warm mix rubberized asphalt at its optimal temperature was studied, and the results show that Sasobit improves the high-temperature stability of the warm mix rubberized asphalt, while the low-temperature performance drops a little bit.
Key words:warm mix rubberized asphalt; Sasobit; mixing and compaction temperature; pavement performance
0引言
近年来,橡胶沥青混凝土路面以其优越的路用性能得到了越来越多的应用[1-2]。然而,橡胶沥青混合料在低温下过于粘,因此,生产施工时一般采用热拌将沥青加热到180℃左右,矿料加热到190℃~ 220℃,拌和后的混合料出场温度不低于180℃,摊铺和碾压温度不低于170℃[8-4]。如此高的温度导致混合料在施工过程中排放大量的CO:、CO、SO 和NO,等气体和粉尘,影响周围环境,损害施工人员的身体健康;在沥青混合料生产中消耗更多的能量;同时也会导致沥青胶结料的老化,影响橡胶沥青
收稿日期:2015-12-19 64
万方数据
混合料的长期使用性能[5-6]。
WMA技术可以提高橡胶沥青混合料的施工性,使混合料在相对较低的温度下可进行拌和、摊铺与压实,即可以吸收冷择低碳环保的优点,又能满足与 HMA相同的路用性能-)。因此采用WMA技术代
替传统的HWA技术,可以有效地改善上述情况。 1
原材料和温拌橡胶沥青制备 1.1原材料
原材料采用新加坡壳牌A-90"基质沥青,西安中轩橡胶粉厂生产的30目橡胶粉,南非SasolWax 公司生产的Sasobit温拌剂,集料采用玄武岩。橡