为考察路面不同层位处的沥青混合料影响因素的显著性,选取了最大公称粒径分别为13 mm和25 mm 2种混合料来进行对比性分析;在试验手段上进行了适当的改进,基于正交试验方法,采用室内车辙碾压成型和钻心取样相结合的试验方法,分别测定了...为考察路面不同层位处的沥青混合料影响因素的显著性,选取了最大公称粒径分别为13 mm和25 mm 2种混合料来进行对比性分析;在试验手段上进行了适当的改进,基于正交试验方法,采用室内车辙碾压成型和钻心取样相结合的试验方法,分别测定了整块车辙板试件的空隙率和钻心芯样的空隙率,综合分析了影响沥青混合料的级配关键筛孔和显著试验条件。结果表明,对于任一种混合料,针对不同指标的显著影响因素存在较大的不同,而对于给定的混合料的同一个指标,显著影响因素也有较大的差别,这些差异可为混合料的深入研究提供有益的参考价值。展开更多
When the filler-bitumen ratio of asphalt mortar changes, its adhesion and viscoelasticity will also change, as well as its performance at the high and low temperatures, fatigue durability, and ductility. Thus, the app...When the filler-bitumen ratio of asphalt mortar changes, its adhesion and viscoelasticity will also change, as well as its performance at the high and low temperatures, fatigue durability, and ductility. Thus, the appropriate fillerbitumen ratio directly affects the asphalt mortar's performance. This paper tested the physical indexes of the No. 70 matrix asphalt mortar modified by additive Sasobit (SB) and Sasowam (SW) through dynamic shear rheometer and bending beam rheometer under different temperature conditions, and comprehensively analyzed the high-temperature anti-rutting and fatigue performance, low-temperature crack resistance performance, and ductility of asphalt mortar. The results show that ore powder not only can increase the antirutting factor but also can increase the aging resistance of asphalt. SB has better performances than SW at high temperatures. As for the filler-bitumen ratio of asphalt mortar with additive SB, the recommended value is between 0.8 and 1.2, and the value may be a little larger for that with SW.展开更多
文摘为考察路面不同层位处的沥青混合料影响因素的显著性,选取了最大公称粒径分别为13 mm和25 mm 2种混合料来进行对比性分析;在试验手段上进行了适当的改进,基于正交试验方法,采用室内车辙碾压成型和钻心取样相结合的试验方法,分别测定了整块车辙板试件的空隙率和钻心芯样的空隙率,综合分析了影响沥青混合料的级配关键筛孔和显著试验条件。结果表明,对于任一种混合料,针对不同指标的显著影响因素存在较大的不同,而对于给定的混合料的同一个指标,显著影响因素也有较大的差别,这些差异可为混合料的深入研究提供有益的参考价值。
文摘When the filler-bitumen ratio of asphalt mortar changes, its adhesion and viscoelasticity will also change, as well as its performance at the high and low temperatures, fatigue durability, and ductility. Thus, the appropriate fillerbitumen ratio directly affects the asphalt mortar's performance. This paper tested the physical indexes of the No. 70 matrix asphalt mortar modified by additive Sasobit (SB) and Sasowam (SW) through dynamic shear rheometer and bending beam rheometer under different temperature conditions, and comprehensively analyzed the high-temperature anti-rutting and fatigue performance, low-temperature crack resistance performance, and ductility of asphalt mortar. The results show that ore powder not only can increase the antirutting factor but also can increase the aging resistance of asphalt. SB has better performances than SW at high temperatures. As for the filler-bitumen ratio of asphalt mortar with additive SB, the recommended value is between 0.8 and 1.2, and the value may be a little larger for that with SW.