西安建筑科技大学学报(自然科学版)

为减轻沥青路面高温车辙病害及路面高温对城市“热岛效应”的影响,提出采用煅烧铝矾石等质量替换混合料中部分粗集料的方法,以达到隔热降温的目的 .通过自制室内模拟太阳辐射试验设备,探究了煅烧铝矾石在不同掺量下AC-13混合料车辙板试件的升温过程和降温行为,对比分析了AC-13和SMA-13混合料的隔热降温性能,并确定了煅烧铝矾石的最佳掺量; 在此基础上,评价了两种热阻式沥青混合料的路用性能.结果表明:AC-13混合料试件不同厚度处的升温过程和降温行为具有差异性,试件不同厚度处的降温幅度大小关系为:下表面>中位置>上表面; 依据降温幅度和经济性,推荐煅烧铝矾石在AC-13和SMA-13混合料中的最佳掺量分别为60%和80%; 最佳掺量条件下的AC-13和SMA-13混合料具有优异的高温性能、良好的低温性能和抵抗水热耦合作用的能力,但其水稳性能相对不足.因此,依据沥青路面气候分区原则,建议将其用于年降雨量小于1 000 mm的湿润区、半干旱区和干旱区,或采取添加抗剥落剂等措施,以改善其水稳性能.

In order to alleviate the high temperature rutting disease of asphalt pavement and to reduce the influence of its high temperature on urban heat island effect, the measure that some coarse aggregates in asphalt mixture are replaced equally in quality by calcined bauxite is taken to achieve the purpose of heat insulation and cooling. Through making test equipment used to simulate solar radiation indoors, the heating process and heat insulation and cooling behavior of rut sample of AC-13 mixture with different dosage of calcined bauxite were investigated in this paper. Also, the heat insulation and cooling properties of AC-13 and SMA-13 mixture were compared and analyzed, and the optimum dosage of calcined bauxite in AC-13 and SMA-13 mixture was determined respectively. On this basis, the pavement performance of two kinds of asphalt mixtures under the optimum dosage was evaluated respectively. The results show that the heating process and cooling behavior of AC-13 mixture samples at different thickness are different, and the magnitude of cooling at different depth is classified as lower surface>middle position>upper surface. Also, the optimum dosage of calcined bauxite in AC-13 and SMA-13 mixture is recommended as 60% and 80% respectively according to the cooling magnitude and economy. Moreover, compared with asphalt mixture that calcined bauxite is not added, the mixture of AC-13 and SMA-13 has excellent high-temperature performance, good low-temperature performance and the ability to resist the combined action of water and heat. But, its water stability is relatively insufficient. Therefore, it is suggested that it should be used in humid, semi-arid and arid areas where annual rainfall is less than 1 000 mm, or take measures to improve its resistance to water stability, such as adding anti-stripping agents.

引言
1 原材料与试验方案
2 阻热型沥青混合料的隔热降温特性分析
3 阻热型沥青混合料的路用性能评价
4 结论

表1 粗集料基本性能指标<br/>Tab.1 Basic performance index of coarse aggregate

表1 粗集料基本性能指标
Tab.1 Basic performance index of coarse aggregate

表2 AC-13和SMA-13矿质混合料级配设计结果<br/>Tab.2 Results of mineral mixture grading design of AC-13 and SMA-13

表2 AC-13和SMA-13矿质混合料级配设计结果
Tab.2 Results of mineral mixture grading design of AC-13 and SMA-13

表3 煅烧铝矾石在不同掺量时的最佳油石比<br/>Tab.3 Optimal asphalt content for asphalt mixture with calcined bauxite at different dosage/%

表3 煅烧铝矾石在不同掺量时的最佳油石比
Tab.3 Optimal asphalt content for asphalt mixture with calcined bauxite at different dosage/%

图1 隔热降温性能测试设备结构图<br/>Fig.1 Structure diagram of test equipment for heat insulation and cooling performance

图1 隔热降温性能测试设备结构图
Fig.1 Structure diagram of test equipment for heat insulation and cooling performance

图2 车辙板温度测点布置示意图<br/>Fig.2 Schematic diagram of measuring point arrangement in rutting plate

图2 车辙板温度测点布置示意图
Fig.2 Schematic diagram of measuring point arrangement in rutting plate

表4 AC-13和SMA-13车辙板试件表面各测点处的辐射强度测试值<br/>Tab.4 Radiation intensity of AC-13 and SMA-13 rutting plate specimens at different measuring points on the surface

表4 AC-13和SMA-13车辙板试件表面各测点处的辐射强度测试值
Tab.4 Radiation intensity of AC-13 and SMA-13 rutting plate specimens at different measuring points on the surface

图3 AC-13车辙板试件不同厚度处的温度变化<br/>Fig.3 Temperature changes at different thickness of AC-13 rutting plate specimens

图3 AC-13车辙板试件不同厚度处的温度变化
Fig.3 Temperature changes at different thickness of AC-13 rutting plate specimens

图4 不同厚度处的温度与上下表面温差<br/>Fig.4 Temperature at different thickness and temperature difference between top and bottom surface

图4 不同厚度处的温度与上下表面温差
Fig.4 Temperature at different thickness and temperature difference between top and bottom surface

图5 温度平衡时不同厚度处的温度<br/>Fig.5 Different thickness's temperature at the temperature balance

图5 温度平衡时不同厚度处的温度
Fig.5 Different thickness's temperature at the temperature balance

图6 温度平衡时上下表面的温度差<br/>Fig.6 Temperature difference between top and bottom surface at the temperature balance

图6 温度平衡时上下表面的温度差
Fig.6 Temperature difference between top and bottom surface at the temperature balance

图7 不同类型的混合料动稳定度测定结果<br/>Fig.7 Results of dynamic stability of different types of mixtures

图7 不同类型的混合料动稳定度测定结果
Fig.7 Results of dynamic stability of different types of mixtures

图8 煅烧铝矾石在不同掺量下的低温破坏应变<br/>Fig.8 Low temperature failure strain of calcined Bauxite at different dosages

图8 煅烧铝矾石在不同掺量下的低温破坏应变
Fig.8 Low temperature failure strain of calcined Bauxite at different dosages

图9 混合料残留稳定度和残留强度比测定结果<br/>Fig.9 Results of residual stability and residual strength ratio of mixtures

图9 混合料残留稳定度和残留强度比测定结果
Fig.9 Results of residual stability and residual strength ratio of mixtures

图10 汉堡车辙试验图像<br/>Fig.10 Image of hamburg rutting test

图10 汉堡车辙试验图像
Fig.10 Image of hamburg rutting test

图11 汉堡车辙试验结果<br/>Fig.11 Results ofhamburg rutting test

图11 汉堡车辙试验结果
Fig.11 Results ofhamburg rutting test

[1] 孙杰,冯立超,冯德成,等.彩色热阻/热反射涂层材料性能研究[J].施工技术,2014,43(23):96-100.
[2] KASSEM H, CHEHAB G, SAAD G. An FEM-predictive tool for simulating the cooling characteristics of freshly paved asphalt concrete layers[J]. International Journal of Pavement Engineering, 2015, 16(2): 152-167.
[3] JIANG Wei, XIAO Jingjing, YUAN Dongdong, et al. Design and experiment of thermoelectric asphalt pavements with power-generation and temperature-reduction functions[J]. Energy & Buildings, 2018, 169: 39-47.
[4] 张宇轩,翟晓强.缓解城市热岛效应的策略及其研究进展[J].建筑科学,2017,33(12):142-151.
[5] DU Yinfei, HAN Zheng, CHEN Jiaqi, et al. A novel strategy of inducing solar absorption and accelerating heat release for cooling asphalt pavement[J]. Solar Energy, 2018, 159: 125-133.
[6] BAIRGI B K, TAREFDER R A, AHMED M U. Long-term rutting and stripping characteristics of foamed warm-mix asphalt(WMA)through laboratory and field investigation[J]. Construction & Building Materials, 2018, 170: 790-800.
[7] 张鑫.沥青路面热反射与热阻技术降温机理与应用研究[D].哈尔滨:哈尔滨工业大学,2011.
[8] 黄文红,王伟,刘军,等.太阳热反射涂层试验路铺筑及性能评价[J].重庆交通大学学报(自然科学版),2012,31(5):982-985,1085.
[9] GUZII S, KRAVCHENKO A, KRYVENKO P, et al. Heat-reflecting geocement based coatings containing perlite for fire protection of timber[J]. Advanced Materials Research, 2015, 1122: 11-14.
[10]SHARMA R, TIWARI S. Design of fly ash based core shell composites as heat reflective coatings for sustainable buildings[C]//International Conference on the Recent Trends in Materials and Devices(ICRTMD). India: Springer Proceedings in Physics, 2017, 178: 169-175.
[11]CAO Xuejuan, TANG Boming, ZHU Hongzhou, et al. Cooling principle analyses and performance evaluation of heat-reflective coating for asphalt pavement[J]. Journal of Materials in Civil Engineering, 2011, 23(7): 1067-1075.
[12]李渊沅.锻烧铝矾石热阻式沥青混合料性能研究[D].长沙:长沙理工大学,2014.
[13]邹玲,郑南翔,纪小平.热阻沥青混合料薄层罩面阻热性能研究[J].武汉理工大学学报,2014,36(6):41-46.
[14]WANG Chaohui, LI Yanwei, YANG Lu, et al. Pavement cooling performance of tourmaline modified asphalt concrete[J]. Journal of Functional Materials, 2014, 45(11): 11081-11086.
[15]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,2005:9-21.
[16]YIN F,ARAMBULA E, LYTTON R, et al. Novel method for moisture susceptibility and rutting evaluation using hamburg wheel tracking test[J]. Journal of the Transportation Research Board, 2014(2446): 1-7.
[17]MOHAMMAD L N, ELSEIFI M, CAO W, et al. Evaluation of various Hamburg Wheel-Tracking devices and AASHTO T324 specification for rutting testing of asphalt mixtures[J]. Road Materials & Pavement Design, 2017, 18: 128-143.
[18]栗培龙,张争奇,李洪华,等.沥青混合料汉堡车辙试验方法[J].交通运输工程学报,2010,10(2):30-35.

备注

引言

1 原材料与试验方案

2 阻热型沥青混合料的隔热降温特性分析

3 阻热型沥青混合料的路用性能评价

4 结论

期刊信息