砾石棱角性对沥青混合料路用性能的影响
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TV422

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The influence of gravel angular property on the road performance of asphalt mixture
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    摘要:

    通过ASTMD3398-97法和AASHTO TP56法,分别对拉萨地区各级粒径下的砾石粗集料棱角进行表征。 采用标准马歇尔、浸水马歇尔、冻融劈裂、车辙和小梁弯曲实验,并结合灰色关联度理论,建立浸水残留稳定 度、动稳定度、应变能密度与砾石粗集料中各级集料棱角值的灰色关联。研究结果表明:砾石粗集料棱角值表 征中,AASHTO TP56法优于ASTMD3398-97法;砾石粗集料棱角值对沥青混合料路用性能的影响程度为:低温 性能>高温性能>抗水损害能力;砾石粗集料的棱角值与沥青混合料的高低温性能具有较高二次相关性。当平均 棱角性在 47.47%,未压实空隙率约 19.52% 时,砾石粗集料的棱角性显著提高沥青混合料的高温性能。粒径为 13.2~16 mm粗集料棱角值对砾石沥青混合料的高低温性能影响最大;砾石沥青混合料的抗水损害能力受沥青与 集料的粘接性能影响显著。

    Abstract:

    The ASTMD3398-97 and the AASHTO TP56 methods were used to analysis the characteristic of the edges of gravel coarse aggregate with different particle sizes in Lhasa. Based on the standard Marshall test,immersion Marshall test,freeze-thaw splitting test,rutting test,trabecular bending test and the gray correlation theory,the gray correlation between the immersion residual stability,dynamic stability,strain energy density and the edge angle value of gravel coarse aggregate was established. The results show that the AASHTO TP56 method is better than the AASHTO TP56 method to get the characterization of the edge angle value. The influence of the angle value of gravel coarse aggregate on pavement performance of the asphalt mixture can be indicated as:low temperature performance > high temperature performance > water damage resistance. When the average angularity is 47.47%,and the percentage of uncompacted void is around 19.52%,the high temperature performance of asphalt mixture can be significantly improved by the angularity of gravel coarse aggregate. The angle value of coarse aggregate with particle size of 13.2-16 mm has the significant influence on the high and low temperature performance of gravel asphalt mixture. The water damage resistance of gravel asphalt mixture is significantly affected by the adhesion between asphalt and aggregate.

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刘力侨,徐龙,谢涛,等.砾石棱角性对沥青混合料路用性能的影响[J].交通科学与工程,2021,37(4):85-92.
LIU Li-qiao, XU Long, XIE Tao, et al. The influence of gravel angular property on the road performance of asphalt mixture[J]. Journal of Transport Science and Engineering,2021,37(4):85-92.

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  • 在线发布日期: 2022-06-06
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