制作工艺对布敦岩沥青混合料高温性能的影响
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摘要
采用常规的车辙试验探究短期老化条件、不同放置时间(24,48,72h),以及拌和楼拌和工艺对布敦岩沥青混合料高温性能的影响;采用单轴贯入试验对现场取芯试件的布敦岩沥青混合料抗剪强度进行研究.结果表明,短期老化后的布敦岩沥青混合料动稳定度高于未老化的布敦岩沥青混合料,且放置时间越长,短期老化对动稳定度的提升越明显;放置时间的延长有助于布敦岩沥青混合料动稳定度的增长,建议布敦岩沥青混合料车辙试验的试件放置时间为48h.此外,岩沥青后加工艺拌制的布敦岩沥青混合料的高温性能优于常规工艺.
The effect of short-term aging condition and aging time(24 h,48 hand 72 h),and the mixing processes of the mixing plant on the high temperature performance of Buton Rock Asphalt Mixture were investigated by using the conventional rutting test.And the uniaxial penetration experiments were used to test the shear strength of field core samples of Buton Rock Asphalt Mixture.The results show that the dynamic stability of Buton Rock Asphalt Mixture after short-term aging is higher than that of the un-aged Buton Rock Asphalt Mixture,and the improvement of dynamic stability of Buton Rock Asphalt Mixture after short-term aging becomes more obvious as the standing time gets longer.The prolongation of the standing time contributes to the growth of dynamic stability of Buton Rock Asphalt Mixture.It is suggested that the standing time of Buton Rock Asphalt Mixture core samples should be 48 h before the rutting test.In addition,BRA-after-mixing process is better than the conventional process for the high temperature performance of Buton Rock Asphalt Mixture.
The effect of short-term aging condition and aging time(24 h,48 hand 72 h),and the mixing processes of the mixing plant on the high temperature performance of Buton Rock Asphalt Mixture were investigated by using the conventional rutting test.And the uniaxial penetration experiments were used to test the shear strength of field core samples of Buton Rock Asphalt Mixture.The results show that the dynamic stability of Buton Rock Asphalt Mixture after short-term aging is higher than that of the un-aged Buton Rock Asphalt Mixture,and the improvement of dynamic stability of Buton Rock Asphalt Mixture after short-term aging becomes more obvious as the standing time gets longer.The prolongation of the standing time contributes to the growth of dynamic stability of Buton Rock Asphalt Mixture.It is suggested that the standing time of Buton Rock Asphalt Mixture core samples should be 48 h before the rutting test.In addition,BRA-after-mixing process is better than the conventional process for the high temperature performance of Buton Rock Asphalt Mixture.
引文
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[4]王明,林发金,刘黎萍.布敦岩沥青灰分胶浆动态流变性能和微细观特性[J].同济大学学报(自然科学版),2016(4):567-571.
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[2]李瑞霞,郝培文,王春,等.布敦岩沥青改性机理[J].公路交通科技,2011,28(12):16-20.
[3]刘黎萍,王明.基于流变学的RA改性沥青性能研究[J].交通科学与工程,2014(3):6-9.
[4]王明,林发金,刘黎萍.布敦岩沥青灰分胶浆动态流变性能和微细观特性[J].同济大学学报(自然科学版),2016(4):567-571.
[5]尹应梅,张肖宁.布敦岩沥青对沥青胶浆高温流变特性的影响[J].武汉理工大学学报,2010(7):85-89.
[6]杨凯.布敦岩沥青混合料配合比设计方法及性能研究[D].西安:长安大学,2012.
[7]王玮.BRA改性沥青及其混合料性能研究[D].长沙:长沙理工大学,2008.
[8]高经纬.岩沥青混合料拌和工艺对其性能的影响及机理分析[D].上海:同济大学,2016.
[9]交通运输部公路科学研究院.公路工程沥青及沥青混合料试验规程:JTG E20-2011[S].北京:人民交通出版社,2011.
[10]颜佳富.基于汉堡试验的沥青混合料车辙影响因素研究[J].交通建设与管理,2013(8):64-65.
[11]安徽省交通规划设计研究院.安徽省地方标准(道路用布敦岩沥青):DB34/T 2323-2015[S].合肥:安徽省交通规划设计研究院,2015.
[12]中交路桥技术有限公司.公路沥青路面设计规范:JTG D50-2017[S].北京:人民交通出版社,2017.