级配对结构层沥青混合料路用性能影响试验研究
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摘要
为了研究级配对结构层沥青混合料路用性能的影响,以双层沥青混合料为例,通过单轴贯入试验、蠕变试验、劈裂试验和重复贯入试验,对结构层沥青混合料的高温稳定性能、低温抗裂性能以及疲劳性能进行研究。研究结果表明,级配对结构层沥青混合料的路用性能有显著影响;级配中粗集料较多,特别是粗集料中较大粒径的集料较多时,结构层沥青混合料抗剪强度大,蠕变速率小,低温破坏应变大,结构层沥青混合料的高温稳定性能和低温抗裂性能好;级配中细集料较多,粗集料较少时,结构层沥青混合料疲劳性能较好。
In order to study the effect of aggregate gradation on the road performance properties of structural-layer asphalt mixtures,taking the double-layer asphalt mixtures being the example,the high temperature stability,low temperature cracking resistance and fatigue performance of structural-layer asphalt mixtures are studied by the uni-axial penetration test,creep test,splitting test and repeated uni-axial penetration test.The results show that aggregate gradation significantly affects the performance-related properties of structural-layer asphalt mixtures.With the increase in coarse aggregate,particularly increase in coarse aggregate with a larger diameter,the shear strength and low temperature failure strain increase,the creep rate decreases,which implies that the high temperature stability and low temperature cracking resistance of structural-layer asphalt mixtures strengthen;with an increase in fine aggregate and an decrease in coarse aggregate,the fatigue performance of structural-layer asphalt mixtures improves.
In order to study the effect of aggregate gradation on the road performance properties of structural-layer asphalt mixtures,taking the double-layer asphalt mixtures being the example,the high temperature stability,low temperature cracking resistance and fatigue performance of structural-layer asphalt mixtures are studied by the uni-axial penetration test,creep test,splitting test and repeated uni-axial penetration test.The results show that aggregate gradation significantly affects the performance-related properties of structural-layer asphalt mixtures.With the increase in coarse aggregate,particularly increase in coarse aggregate with a larger diameter,the shear strength and low temperature failure strain increase,the creep rate decreases,which implies that the high temperature stability and low temperature cracking resistance of structural-layer asphalt mixtures strengthen;with an increase in fine aggregate and an decrease in coarse aggregate,the fatigue performance of structural-layer asphalt mixtures improves.
引文
[1] Karakouzian M,Dunning M R,Dunning R L,Stegeman J D.Performance of Hot Mix Asphalt Using Coarse and Skip Graded Aggregates[J].Journal of Materials in Civil Engineering,1996,8(2):101-107.
[2] Fu Q L,Chen S F.Influence of Aggregate Gradation on Pavement Performance of Open-Graded Large Stone Asphalt Mixes[C]//Tenth International Conference of Chinese Transportation Professionals.2010:3133-3140.
[3] Cao W,Liu S,Li Y,et al.Effect of Aggregate Gradation on Volumetric Parameters and the High Temperature Performance of Asphalt Mixtures[C]//GeoChina International Conference.2016:42-50.
[4]张超,许志鸿,杨瑞华,等.骨架密实型沥青混合料中高温性能与级配关系[J].同济大学学报:自然科学版,2008,36(5):603-608.
[5]赵战利,张争奇,胡长顺.集料级配对沥青路面抗滑性能的影响[J].长安大学学报:自然科学版,2005,25(1):6-9.
[6] Sun L J.Structural Behavior of Asphalt Pavements[M].Elsevier Butterworth-Heinemann,UK,2016.
[2] Fu Q L,Chen S F.Influence of Aggregate Gradation on Pavement Performance of Open-Graded Large Stone Asphalt Mixes[C]//Tenth International Conference of Chinese Transportation Professionals.2010:3133-3140.
[3] Cao W,Liu S,Li Y,et al.Effect of Aggregate Gradation on Volumetric Parameters and the High Temperature Performance of Asphalt Mixtures[C]//GeoChina International Conference.2016:42-50.
[4]张超,许志鸿,杨瑞华,等.骨架密实型沥青混合料中高温性能与级配关系[J].同济大学学报:自然科学版,2008,36(5):603-608.
[5]赵战利,张争奇,胡长顺.集料级配对沥青路面抗滑性能的影响[J].长安大学学报:自然科学版,2005,25(1):6-9.
[6] Sun L J.Structural Behavior of Asphalt Pavements[M].Elsevier Butterworth-Heinemann,UK,2016.