|
|
- 2018
两种沥青胶浆的疲劳及自愈合性能试验
|
Abstract:
为了研究沥青胶浆的疲劳及自愈合特性，利用动态剪切流变仪（DSR）进行时间扫描及疲劳-愈合-再疲劳测试，并通过原子力显微镜（AFM）对细观结构进行观测，比较分析了不同粉胶比下基质沥青胶浆和苯乙烯-丁二烯-苯乙烯嵌段共聚物（SBS）改性沥青胶浆的疲劳性能，以及在常温（25℃）下3个不同间歇期的自愈合性能。试验发现：SBS沥青胶浆具有更好的疲劳和自愈合性能，两种沥青胶浆疲劳寿命均随粉胶比的增大而增加，同一粉胶比条件下，更长的间歇期有利于其自愈合，过大或者过小的粉胶比都会降低沥青胶浆的自愈合性能；AFM观测结果表明：基质沥青胶浆出现明显的"蜂状结构"，粉胶比增加，矿粉吸附更多的沥青质，"蜂状结构"变多，与沥青界面内聚力作用增强，提高了抗疲劳性能，SBS改性剂与沥青相容性良好，改性沥青胶浆没有出现"蜂状结构"，改性剂的加入增强了分子间内聚力，有助于提高抗疲劳性能，因此建议路面材料选用改性沥青胶浆。 In order to study on the fatigue and self-healing characteristics of asphalt mortar, the dynamic shear rheometer (DSR) was utilized to test time sweep and fatigue-healing-fatigue, and the microstructure was observed by Atomic Force Microscopy (AFM), and the fatigue performance of asphalt mortar and styrene butadiene styrene block copolymer(SBS) modified asphalt mortar under different powder binder ratios and self-healing properties of 3 different intermittent periods at normal atmospheric temperature (25℃) were analyzed and compared. It's found that SBS asphalt mortar has better fatigue and self healing properties, the fatigue life of two kinds asphalt mortar increases with powder binder ratio, and longer intermittent period is beneficial to self-healing under the same powder binder ratio. AFM observations show that matrix asphalt mortar appears "bee like structure" obviously, and asphaltene is absorbed and "bee like structure" becomes more, so the cohesion between filler and asphalt is enhanced, and fatigue properties is also improved with the increase of powder binder ratio. SBS modifier has good compatibility with asphalt, not a "bee like structure", and the addition of the modifier greatly enhances the cohesion between the molecules, also it is conducive to improve the fatigue properties, so it is recommended that modified asphalt mortar is used as pavement material. 国家自然基金（51568054）；道路结构与材料交通行业重点实验室（北京）开放基金课题
| [1] | QIU J, VEN M V D, MOLENAAR A. Crack-healing investigation in bituminous materials[J]. Journal of Materials in Civil Engineering, 2013, 25(7):864-870. |
| [2] | GARCíA á. Self-healingofopen cracksin asphaltmastic[J]. Fuel, 2012, 93:264-272. |
| [3] | GASKIN J. On bitumen microstructure and the effects of crack healing[D]. Nottingham:University of Nottingham, 2013. |
| [4] | SUN D, LIN T, ZHU X, et al. Calculation and evaluation of activation energy as a self-healing indication of asphalt mastic[J]. Construction and Building Materials, 2015, 95:431-436. |
| [5] | 周燕, 李佩林. 基于分子模拟技术的沥青自愈合性能研究[J]. 山西建筑, 2013, 39(6):83-85. ZHOU Y, LI P L. Rearch on asphalt self-healing property based on molecular modeling technique[J]. Shanxi Architecture, 2013, 39(6):83-85(in Chinese). |
| [6] | 孙大权, 张立文, 梁果. 沥青混凝土疲劳损伤自愈合行为研究进展(1):自愈合行为机理与表征方法[J]. 石油沥青, 2011, 25(5):7-11. SUN D Q, ZHANG L W, LIANG G. Review on self-healing behavior of asphalt concrete (1):Mechanism and characterization methods of self-healing behavior[J]. Etroleum Asphalt, 2011, 25(5):7-11(in Chinese). |
| [7] | SUN D, LIN T, ZHU X, et al. Calculation and evaluation of activation energy as a self-healing indication of asphalt mastic[J]. Construction and Building Materials, 2015, 95:431-436. |
| [8] | 徐辰. 沥青自愈合特性及影响因素研究[D]. 重庆:重庆交通大学, 2013. XU C. Study on the features and influencing factors of self-healing characteristic of asphalt[D]. Chongqing:Chongqing Jiaotong University, 2013(in Chinese). |
| [9] | 单丽岩, 谭忆秋. 考虑触变性的沥青疲劳过程分析[J]. 中国公路学报, 2012, 25(4):10-15. SHAN L Y, TAN Y Q. Analysis of fatigue process of asphalt considering thixotropy[J]. China Journal of Highway and Transport, 2012, 25(4):10-15(in Chinese). |
| [10] | 聂现会, 钱国平, 杨博, 等. 基于CT和流动试验的沥青胶浆裂缝自愈性能研究[J]. 中外公路, 2013, 33(2):247-250. NIE X H, QIAN G P, YANG B, et al. Self-healing of open cracks in asphalt mastic, the science and technology of fuel and energy[J]. Journal of China and Foreign Highway, 2013, 33(2):247-250(in Chinese). |
| [11] | 姜睆. 沥青胶浆自愈合能力研究[D]. 武汉:武汉理工大学, 2011. JIANG W. Rearch on the self-healing capacity of bitumen mastics[D]. Wuhan:Wuhan University of Technology, 2011(in Chinese). |
| [12] | QIU J, VEN M F C V D, WU S P, et al. Investigating self healing behaviour of pure bitumen using Dynamic Shear Rheometer[J]. Fuel, 2011, 90(8):2710-2720. |
| [13] | 孙艳娜, 李立寒, 汪于凯. 沥青疲劳性能评价指标[J]. 西南交通大学学报, 2014, 49(6):1102-1107. SUN Y N, LI L H, WANG Y K. Evaluation parameter research of asphalt binder fatigue[J]. Journal of Southwest Jiaotong University, 2014, 49(6):1102-1107(in Chinese). |
| [14] | 单丽岩. 基于粘弹特性的沥青疲劳流变机理研究[D]. 哈尔滨:哈尔滨工业大学, 2010. SHAN L Y. Fatigue and rheology mechanism of asphalt binder based on viscoelastic characteristic[D]. Harbin:Harbin Institute of Technology, 2010(in Chinese). |
| [15] | 刘全涛. 沥青胶浆的疲劳性能研究[D]. 武汉:武汉理工大学, 2008. LIU Q T. Evaluation of the fatigue properties bituminous binders[D]. Wuhan:Wuhan University of Technology, 2008(in Chinese). |
| [16] | 王树杰, 郝冠军. 粉胶比对沥青胶浆流变性能的影响[J]. 公路, 2015(6):15-18. WANG S J, HAO G J. Effect of powder binder ratio on the rheological properties of asphalt mortar[J]. Highway, 2015(6):15-18(in Chinese). |
| [17] | 邵显智, 谭忆秋, 邵敏华. 沥青胶浆微观界面的研究[J]. 公路, 2003(12):106-108. SHAO X Z, TAN Y Q, SHAO M H. Research on microstructure of asphalt mortar[J]. Highway, 2003(12):106-108(in Chinese). |
| [18] | 孙大权, 刘富良, 林添坂, 等. 沥青胶浆疲劳寿命分析方法与预估方程[J]. 建筑材料学报, 2016, 19(1):100-104. SUN D Q, LIU F L, LIN T B, et al. Fatigue life evaluation method and prediction equation for asphalt mortar[J]. Journal of Building Materials, 2016, 19(1):100-104(in Chinese). |
| [19] | 曹贵, 刘永红, 马晓燕. SBS改性沥青疲劳特性影响因素分析[J]. 公路交通科技, 2014(1):76-78. CAO G, LIU Y H, MA X Y. Analysis of influencing factors on fatigue characteristics of SBS modified asphalt[J]. Highway Traffic Science and Tehnology, 2014(1):76-78(in Chinese). |
| [20] | 王鹏, 董泽蛟, 谭忆秋. 基于分子模拟的沥青蜂状结构成因探究[J]. 中国公路学报, 2016, 29(3):9-16. WANG P, DONG Z J, TAN Y Q. Research on the formation mechanism of bee-like structures in asphalt binders based on molecular simulations[J]. China Journal of Highway and Transport, 2016, 29(3):9-16(in Chinese). |
| [21] | 龚明辉. 基于原子力显微镜的沥青微观自愈机理研究和定量分析[D]. 南京:东南大学, 2014. GONG M H. Research on the micro-healing mechanism of asphalt with atomic force microscopy and quantitative analysis[D]. Nanjing:Southeast University, 2014(in Chinese). |
| [22] | 王腾. 复合型胶粉改性沥青胶浆及混合料性能研究[D]. 武汉:武汉理工大学, 2014. WANG T. Research on performance of compound rubber modified asphalt mortar and mixture[D]. Wuhan:Wuhan University of Technology, 2014(in Chinese). |
