沥青路面摊铺温度及压实度均匀性评价
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摘要
为提高沥青路面施工中温度及压实度均匀性的监测水平,探究温度均匀性与压实度均匀性之间的相关性,文章通过红外热像仪捕捉路面摊铺过程中的红外热像图,以温度参数(平均值、极差及变异系数)作为指标,评价了沥青路面的温度均匀性;采用无核密度仪测定相同路段的压实度,讨论了路面横、纵截面的压实度变化规律,并给出了被测路段压实度代表值、合格率及变异系数;分析了摊铺温度与压实度在宏观与细观上的相关性。研究结果表明:沥青路面的压实质量不仅受到温度参数的影响,还受到实际工况与压实工艺的影响;在保证温度均匀性后,严格按照规范开展压实工作对提高压实质量、避免压实度分布不均至关重要;沥青路面的压实度均匀性在宏观上与其温度均匀性高度相关,而在细观上除温度显著变异的位置外,两者不存在严格的位置对应关系。
In order to further improve the monitoring level of the temperature and compaction uniformity of asphalt pavement during the construction process,and to explore the correlation between the temperature uniformity and the compaction uniformity,the infrared thermal imaging system was firstly adopted to capture the thermal images of asphalt mixture at paving stage.Thermal images were utilized to calculate the temperature parameters(average value,range and coefficient of variation)to evaluate the temperature uniformity.Secondly,compaction values were measured by the non-nuclear density meter,the difference in the pavement compaction at different sections was discussed,and the representative compaction,qualified rate and coefficient of variation were given.Finally,the correlation between the paving temperature uniformity and compaction uniformity at the macroscopic and microscopic levels was studied.The results show that the pavement compaction quality is jointly influenced by temperature parameter,working conditions and construction technology,but after ensuring the temperature uniformity of the asphalt mixture,it is more important to conduct the compaction work by strictly following the construction specifications to improve the quality of compaction.At the macroscopic level,the uniformity of asphalt pavement compaction is highly correlated with its temperature uniformity.At the microscopic level,there is no strict position correspondence between themexcept for the position with significant temperature variation.
In order to further improve the monitoring level of the temperature and compaction uniformity of asphalt pavement during the construction process,and to explore the correlation between the temperature uniformity and the compaction uniformity,the infrared thermal imaging system was firstly adopted to capture the thermal images of asphalt mixture at paving stage.Thermal images were utilized to calculate the temperature parameters(average value,range and coefficient of variation)to evaluate the temperature uniformity.Secondly,compaction values were measured by the non-nuclear density meter,the difference in the pavement compaction at different sections was discussed,and the representative compaction,qualified rate and coefficient of variation were given.Finally,the correlation between the paving temperature uniformity and compaction uniformity at the macroscopic and microscopic levels was studied.The results show that the pavement compaction quality is jointly influenced by temperature parameter,working conditions and construction technology,but after ensuring the temperature uniformity of the asphalt mixture,it is more important to conduct the compaction work by strictly following the construction specifications to improve the quality of compaction.At the macroscopic level,the uniformity of asphalt pavement compaction is highly correlated with its temperature uniformity.At the microscopic level,there is no strict position correspondence between themexcept for the position with significant temperature variation.
引文
[1]张争奇,徐耀辉,胡红松,等.沥青路面离析的数字图像评价方法[J].湖南大学学报(自然科学版),2016,43(9):129-135.
[2]彭余华,沙爱民,罗志华,等.沥青混合料温度离析特性[J].长安大学学报(自然科学版),2008,28(6):5-10.
[3] LI X L,ZHOU Z G,LV X C,et al.Temperature segregation of warm mix asphalt pavement:laboratory and field evaluations[J].Construction and Building Materials,2017,136:436-445.
[4]郑健龙,陈骁,李庆瑞,等.热态沥青混合料路面振动压实过程ANSYS模拟研究[J].工程力学,2008,25(10):200-206.
[5]查旭东,黄雷.PQI快速检测评价沥青路面压实质量的应用研究[J].长沙理工大学学报(自然科学版),2008,5(1):7-10,15.
[6] PETERSEN D R,LINK R E,STROUP-GARDINER M.Identifying segregation in hot mix asphalt pavements using rolling nuclear gage measurements and infrared imaging[J].Journal of Testing and Evaluation,2000,28(2):121-130.
[7]龙建武,申铉京,陈海鹏.自适应最小误差阈值分割算法[J].自动化学报,2012,38(7):1134-1144.
[8] STROUP-GARDINER M,LAW M,NESMITH C.Using infrared thermography to detect and measure segregation in hot mix asphalt pavements[J].International Journal of Pavement Engineering,2000,1(4):265-284.
[9]李波,岳永和,窦晖,等.温拌沥青混合料施工中温度场的时空特性[J].武汉理工大学学报,2011,33(4):61-64.
[10]交通部公路科学研究所.公路沥青路面施工技术规范:JTG F40—2004[S].北京:人民交通出版社,2004:30-31.
[11]胡力群,暴英波,王天林,等.基于热成像的沥青混合料摊铺温度均匀性分析[J].江苏大学学报(自然科学版),2016,37(6):735-739.
[12]交通部公路科学研究所.公路工程质量检验评定标准:JTG F80/1—2004[S].北京:人民交通出版社,2004:31-32.
[2]彭余华,沙爱民,罗志华,等.沥青混合料温度离析特性[J].长安大学学报(自然科学版),2008,28(6):5-10.
[3] LI X L,ZHOU Z G,LV X C,et al.Temperature segregation of warm mix asphalt pavement:laboratory and field evaluations[J].Construction and Building Materials,2017,136:436-445.
[4]郑健龙,陈骁,李庆瑞,等.热态沥青混合料路面振动压实过程ANSYS模拟研究[J].工程力学,2008,25(10):200-206.
[5]查旭东,黄雷.PQI快速检测评价沥青路面压实质量的应用研究[J].长沙理工大学学报(自然科学版),2008,5(1):7-10,15.
[6] PETERSEN D R,LINK R E,STROUP-GARDINER M.Identifying segregation in hot mix asphalt pavements using rolling nuclear gage measurements and infrared imaging[J].Journal of Testing and Evaluation,2000,28(2):121-130.
[7]龙建武,申铉京,陈海鹏.自适应最小误差阈值分割算法[J].自动化学报,2012,38(7):1134-1144.
[8] STROUP-GARDINER M,LAW M,NESMITH C.Using infrared thermography to detect and measure segregation in hot mix asphalt pavements[J].International Journal of Pavement Engineering,2000,1(4):265-284.
[9]李波,岳永和,窦晖,等.温拌沥青混合料施工中温度场的时空特性[J].武汉理工大学学报,2011,33(4):61-64.
[10]交通部公路科学研究所.公路沥青路面施工技术规范:JTG F40—2004[S].北京:人民交通出版社,2004:30-31.
[11]胡力群,暴英波,王天林,等.基于热成像的沥青混合料摊铺温度均匀性分析[J].江苏大学学报(自然科学版),2016,37(6):735-739.
[12]交通部公路科学研究所.公路工程质量检验评定标准:JTG F80/1—2004[S].北京:人民交通出版社,2004:31-32.