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材料研究学报  2016, Vol. 30 Issue (10): 773-780    DOI: 10.11901/1005.3093.2016.102
  研究论文 本期目录 | 过刊浏览 |
不同沥青结合料水损害的纳米尺度研究*
刘克非1(),邓林飞1,郑佳宇1,蒋康2
1. 中南林业科技大学土木工程与力学学院 长沙 410004
2. 湖南省交通科学研究院 长沙 410015
Moisture Induced Damage of Various Asphalt Binders
Kefei LIU1,**(),Jiayu ZHENG1,Kang JIANG2
1. College of Civil Engineering and Mechanics, Central South University of Forestry & Technology, Changsha 410004, China
2. Hunan Communications Research Institute, Changsha 410015, China
引用本文:

刘克非,邓林飞,郑佳宇,蒋康. 不同沥青结合料水损害的纳米尺度研究*[J]. 材料研究学报, 2016, 30(10): 773-780.
Kefei LIU, Jiayu ZHENG, Kang JIANG, . Moisture Induced Damage of Various Asphalt Binders[J]. Chinese Journal of Materials Research, 2016, 30(10): 773-780.

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摘要: 

为了从微观尺度分析不同沥青结合料的抗水损害性能, 分别制备了不同状态下(干燥/潮湿、原样/老化)的70#A基质沥青、SBS改性沥青、Sasobit温拌沥青和橡胶改性沥青试样, 采用原子力显微镜(AFM)分析了各试样的表面特性, 测试了沥青与矿料间的粘附力值。结果表明: 干燥状态下, 基质沥青与矿料间的粘附力大于改性沥青, 但其测定结果的离散程度和波动性最大。潮湿状态下, 原样基质沥青、Sasobit温拌沥青和橡胶改性沥青的粘附力值均有不同程度的下降, 原样SBS改性沥青的对应值有较大的提高, 原样SBS改性沥青具有较好的抗水损能力。沥青老化过程极大地降低基质沥青的抗水分侵蚀能力, 基质沥青对水分更敏感, 更易产生水损害; 沥青老化也会降低SBS改性沥青的抗水损能力。
关键词 ： 无机非金属材料,  沥青结合料,  原子力显微镜,  水损害,  微观    
Abstract：

Four kinds of asphalt binders, 70#A base asphalt, SBS modified asphalt, Sasobit warm mix asphalt and rubber modified asphalt are prepared, then the water induced damage of them was studied by laboratory tests under different conditions (in dry or wet atmospheres, for as prepared or aged asphalts ). The surface morphology of the asphalts was characterized by means of atomic force microscope (AFM), while the adhesion force between the asphalt and the mineral aggregate was measured. The results show that, under the dry condition, the base asphalt show stronger adhesive ability with the mineral aggregate compared with the modified asphalts, but also have relatively large dispersion and fluctuation in the tested results. Under the wet condition, the adhesion forces of the as prepared base asphalt, Sasobit warm mix asphalt and rubber modified asphalt all decreased to some extent, among others the as prepared SBS modified asphalt exhibited higher adhesion force, showing stronger water damage resistance ability. The aging process significantly lowers the moisture erosion resistance ability of the base asphalt, making it more sensitive to moisture and more vulnerable to water damage. The aging also depresses the water damage resistance ability of SBS modified asphalt.
Key words： inorganic non-metallic materials    asphalt binder    atomic force microscope    moisture damage    microcosmic
收稿日期: 2016-02-23     
基金资助:* 湖南省教育厅科学研究项目15B253和湖南省大学生研究性学习和创新性实验计划项目
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刘克非
邓林飞
郑佳宇
蒋康

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https://www.cjmr.org/CN/10.11901/1005.3093.2016.102      或      https://www.cjmr.org/CN/Y2016/V30/I10/773

Type of asphalt Penetration (25℃)/(0.1 mm) Penetration index (PI) Ductility (5℃)/cm Softening point /℃ Elastic recovery (25℃) /%
70#A base asphalt Original 76 -0.80 19 46.4 --
Aging 52 -0.68 9.8 52.4 --
SBS modified asphalt Original 58 0.33 26.4 59.7 94.0
Aging 46 0.41 10.8 68.1 88.2
Sasobit warm mix asphalt Original 56 0.37 14.8 63.5 89.1
Aging 48 0.43 11.0 73.0 82.6
Rubber modified asphalt Original 59 0.39 13.9 52.9 90.5
Aging 52 0.44 10.6 58.3 83.2
表1  各沥青结合料主要技术指标
图1  改性沥青制备工艺流程图
图2  各沥青结合料典型表面图像(干燥试样)
Type of asphalt Dry Wet
Average value /nm Maximum value /nm RMS
/nm		 Average value /nm Maximum value /nm RMS
/nm
70#A base asphalt original 9.3 20.2 12.51 11.3 24.9 14.18
aging 11.7 24.3 14.77 14.6 26.3 16.22
SBS modified asphalt original 4.6 8.9 7.21 6.8 12.7 8.45
aging 7.1 13.8 9.95 8.3 15.9 9.11
Sasobit warm mix asphalt original 9.9 19.8 13.13 12.5 24.6 14.27
aging 14.8 23.1 15.01 13.6 29.8 15.80
Rubber modified asphalt original 13.3 43.4 18.17 16.7 41.2 19.95
aging 19.8 46.5 19.30 23.6 46.8 19.92
表2  各沥青结合料试样表面粗糙度计算结果
图3  各沥青结合料力-位移测试曲线图(干燥试样)
Point 70#A base
asphalt		 SBS modified asphalt Sasobit warm mix asphalt Rubber modified asphalt
Dry Wet Dry Wet Dry Wet Dry Wet
1 103.7 71.3 57.8 126.4 49.6 38.5 45.6 34.9
2 88.9 52.5 61.5 111.3 52.7 42.7 47.7 39.6
3 111.2 47.9 60.3 121.6 58.8 46.8 41.5 40.3
4 101.5 50.7 66.4 125.2 59.1 44.3 41.3 41.7
5 86.5 58.5 63.7 119.5 54.3 39.6 39.2 35.9
6 88.2 47.8 63.5 117.4 55.6 37.2 44.5 33.7
7 107.4 46.7 59.6 126.3 56.1 45.8 40.1 42.1
8 85.3 63.4 58.7 109.9 52.5 47.5 42.8 38.5
9 91.2 67.9 64.0 115.8 58.4 40.9 48.1 34.5
10 114.1 57.3 67.5 101.6 56.9 48.7 46.2 34.8
Average /nN 97.8 56.4 62.3 117.5 55.4 43.2 43.7 37.6
Standard deviation/nN 9.963 8.346 3.087 7.672 2.959 3.824 3.008 3.033
Percent variation/% 10.19 14.80 4.95 6.53 5.34 8.85 6.88 8.07
表3  原样沥青结合料粘附力测试结果
Point 70#A base
asphalt		 SBS modified asphalt Sasobit warm mix asphalt Rubber modified asphalt
Dry Wet Dry Wet Dry Wet Dry Wet
1 47.3 28.7 53.4 75.5 51.3 34.5 28.8 18.8
2 52.4 21.5 45.9 75.1 48.5 29.6 27.5 21.6
3 58.9 22.6 55.5 66.4 37.9 25.9 32.3 25.7
4 55.3 30.6 51.1 67.5 39.6 24.3 34.1 24.3
5 42.5 19.8 43.7 80.2 44.1 33.6 26.8 25.2
6 41.7 21.5 44.1 79.9 45.3 35.8 25.7 17.9
7 48.9 28.8 46.2 64.8 46.2 30.1 29.1 19.0
8 50.8 20.7 54.7 66.2 37.8 27.3 31.5 25.4
9 56.7 24.2 43.8 78.4 35.7 22.5 27.4 29.8
10 61.5 26.6 48.6 79.0 45.6 23.4 32.8 27.3
Average /nN 51.6 24.5 48.7 73.3 43.2 28.7 29.6 23.5
Standard deviation/nN 6.316 3.688 4.409 6.014 4.900 4.535 2.731 3.787
Percent variation/% 12.24 15.05 9.05 8.20 11.34 15.80 9.23 16.11
表4  老化沥青结合料粘附力测试结果
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