拌和与成型温度对SMA-16混合料性能影响研究

关键字：道路工程,SMA-16路面,马歇尔试验,拌和温度,混合料

（1.东北林业大学 土木工程学院，黑龙江 哈尔滨  150040；2.越南林业大学 机电与土木工程系，越南 河内  100803）

    摘要：为明确施工温度对SMA-16混合料路面性能的影响，并为SMA-16路面施工的合理拌和及碾压成型温度提供技术依据，研究不同温度条件下沥青与矿料的粘附性；同时拟定4个拌和温度、2个成型温度，研究不同温度条件下SMA-16混合料的毛体积密度、孔隙率、马歇尔稳定性、水稳定性和高低温性能的变化。结果表明：加热温度为170～185 ℃时玄武岩粗集料与SBS改性沥青的裹覆性最好；拌和温度对木质素纤维SMA混合料高温稳定性的影响比较大，对水稳定性和低温稳定性的影响不明显；拌和温度为175～185 ℃时，木质素纤维SMA混合料的高温稳定性、低温变形性能和水稳定性最好。
    关键词：道路工程；SMA-16路面；马歇尔试验；拌和温度；混合料性能
    中图分类号：TU528.42        文献标识码：A        文章编号：1001-702X（2017）07-0133-04

Research on the effect of mixing and forming temperature on SMA-16 mixture properties
CHENG Peifeng1，NGUYEN Hoang Phong1，2，HAO Zhonghua1，LI Jiting1，DANG Van Thanh2
（1.Civil Engineering College，Northeast Forestry University，Harbin 150040，China；
2.Mechanical and Civil Engineering Faculty，Vietnam National University of Forestry，Hanoi 100803，Vietnam）

    Abstract：In order to research the effect of construction temperature on the performance of SMA-16 mixture pavement，this paper provides technical proves for the proper mixing temperature of SMA-16 pavement construction with rational mixing and rolling，researched on the adhesion property of asphalt and mineral aggregate under different temperatures；at the same time，drawing out 4 different types of mixing temperatures and 2 different types of forming temperatures，investigated the change of bulk density，porosity，Marshall stability，water stability and high-and-low temperature performance of SMA-16 mixture. The results showed that the best heating temperature for best wrapping of basalt coarse aggregate and SBS modified asphalt coating is around 170～185 ℃；mixing temperature affects significantly on high temperature stability of lignin fiber SMA mixture；on the contrary，mixing temperature affects insignificantly on water stability and low temperature stability；under mixing temperature of 175～185 ℃，lignin fiber SMA mixture is at its optimum in terms of high temperature stability，low temperature deformation performance and water stability.
    Key words：pavement construction，SMA-16 pavement，Marshall test，mixing temperature，performance of mixture