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热老化作用下橡胶改性沥青的低温流变性能

于江 赵群 叶奋 宋卿卿

于江, 赵群, 叶奋, 宋卿卿. 热老化作用下橡胶改性沥青的低温流变性能[J]. 西南交通大学学报, 2021, 56(1): 108-115. doi: 10.3969/j.issn.0258-2724.20180987
引用本文: 于江, 赵群, 叶奋, 宋卿卿. 热老化作用下橡胶改性沥青的低温流变性能[J]. 西南交通大学学报, 2021, 56(1): 108-115. doi: 10.3969/j.issn.0258-2724.20180987
YU Jiang, ZHAO Qun, YE Fen, SONG Qingqing. Low Temperature Rheological Performance Analysis of Rubber Modified Asphalt under Heat Aging Process[J]. Journal of Southwest Jiaotong University, 2021, 56(1): 108-115. doi: 10.3969/j.issn.0258-2724.20180987
Citation: YU Jiang, ZHAO Qun, YE Fen, SONG Qingqing. Low Temperature Rheological Performance Analysis of Rubber Modified Asphalt under Heat Aging Process[J]. Journal of Southwest Jiaotong University, 2021, 56(1): 108-115. doi: 10.3969/j.issn.0258-2724.20180987

热老化作用下橡胶改性沥青的低温流变性能

doi: 10.3969/j.issn.0258-2724.20180987
基金项目: 国家自然科学基金(51168044,51668060,51568064)
详细信息
    作者简介:

    于江(1960—),男,教授,研究方向为道路工程,E-mail:zhaoqxj@163.com

  • 中图分类号: V221.3

Low Temperature Rheological Performance Analysis of Rubber Modified Asphalt under Heat Aging Process

  • 摘要: 为探究老化作用下橡胶改性沥青(AER)及其复合改性沥青(AER/SBS)的低温流变性能,借助常规性能、低温弯曲试验和Burgers模型,研究了在不同老化状态、不同橡胶粉掺量下AER改性沥青及其复合改性沥青的低温流变特性,同时借助红外光谱(FTIR)方法定量分析老化对AER改性沥青官能团的影响,并将其官能团指数和低温指标进行相关性分析. 研究结果表明:在不同老化状态下AER、SBS均可提高沥青低温性能,且短期老化下AER/SBS复合改性沥青的低温性能优于AER改性沥青,长期老化则反之;AER、SBS改性剂均可改善沥青的劲度模量,且AER对沥青劲度模量的影响程度更显著,同时低温指标(劲度模量S、蠕变速率m、劲度模量与蠕变速率之比S/m)与黏弹性指标(松弛时间λ、耗散能比a具有紧密的联系;AER改性沥青的低温性能与脂肪指数IA和脂肪长链指数IAL有较高的相关性,且IA越大其低温性能越好,IAL则反之.

     

  • 图 1  官能团特征峰面积示意

    Figure 1.  Diagram of characteristic peak area

    图 2  低温等级温度

    Figure 2.  Low temperature performance grades

    图 3  低温指标的拟合结果

    Figure 3.  Fitting results of low temperature indicators

    表  1  ESSO70沥青技术指标

    Table  1.   Properties of ESSO70 asphalt

    检测项技术要求检测结果
    针入度(25 ℃,5 s)/mm6.00~8.006.61
    延度(15 ℃)/cm ≥ 100 > 150
    软化点/℃ ≥ 46.049.6
    黏度(135 ℃)/(Pa•s)0.412
    密度/(g•cm−31.023
    闪点/℃ ≥ 230272
    下载: 导出CSV

    表  2  AER改性沥青的物理性能指标

    Table  2.   Properties of AER modified asphalt

    沥青类型针入度
    (25 ℃)/
    mm
    软化
    点/℃
    延度
    (5 ℃)/cm
    黏度
    (135 ℃)/
    (Pa•s)
    ESSO706.6149.600.412
    10AER10.3050.912.30.731
    15AER11.5050.727.01.243
    20AER12.0050.530.02.101
    10AER2SBS7.0051.753.01.251
    10AER3SBS6.8056.253.02.021
    10AER4SBS6.5059.754.03.013
    15AER3SBS7.3055.352.02.496
    20AER3SBS7.0061.558.03.765
    下载: 导出CSV

    表  3  峰位置与谱峰归属

    Table  3.   Peak position and belongingness

    峰位/cm−1谱峰归属对应沥青成分
    700聚苯乙烯 C = H
    的伸缩振动
    聚苯乙烯
    724亚甲基链(CH2nn ≥ 4)协同振动脂肪的长链
    743芳香族支链的弯曲振动芳香分
    814、864苯环的伸缩振动芳香分
    965丁二烯 C = H 的伸缩振动聚丁二烯
    1 030亚砜基(S = O)的
    伸缩振动
    沥青中硫氧氧化
    1 310、2 953烷烃(CH3脂肪的支链
    1 376甲基(−CH3)伞式振动脂肪的支链
    1 460亚甲基(−CH2)剪式振动脂肪的长链
    1 600非对称苯环的呼吸振动苯环、羧基
    1 700羰基(C = O)伸缩振动碳氧氧化
    2 850、2 920亚甲基C−H对称振动脂肪的长链
    下载: 导出CSV

    表  4  不同老化状态下的BBR结果

    Table  4.   Low temperature bending bean rheology (BBR) test results under different aging conditions

    状态温度/℃名称ESSO7010AER15AER20AER10AER2SBS10AER3SBS10AER4SBS15AER3SBS20AER3SBS
    O −12 S/MPa 139 183 116 83 194 129 97 55
    m 0.401 0.435 0.415 0.423 0.4 0.434 0.416 0.418
    −18 S/MPa 403 403 329 242 278 258 243 211 181
    m 0.283 0.224 0.263 0.297 0.365 0.349 0.341 0.352 0.368
    −24 S/MPa 872 776 463 426 456 420 338 367
    m 0.168 0.162 0.201 0.297 0.263 0.253 0.271 0.285
    R −12 S/MPa 180 173 108 67 123 102 103 74
    m 0.37 0.372 0.362 0.459 0.365 0.392 0.413 0.435
    −18 S/MPa 445 486 265 256 260 245 221 198 181
    m 0.258 0.259 0.342 0.339 0.346 0.310 0.305 0.331 0.343
    −24 S/MPa 904 512 373 386 493 444 386 368
    m 0.156 0.193 0.238 0.244 0.241 0.256 0.251 0.254
    P −12 S/MPa 206 105 88 74 122 105 85 74 63
    m 0.322 0.380 0.405 0.411 0.391 0.393 0.395 0.426 0.451
    −18 S/MPa 481 253 224 205 290 261 272 207 195
    m 0.241 0.32 0.334 0.342 0.322 0.310 0.291 0.337 0.343
    −24 S/MPa 855 453 379 332 511 484 452 431 427
    m 0.167 0.246 0.251 0.278 0.221 0.224 0.213 0.260 0.271
     注:O—未老化;R—短期老化;P—长期老化.
    下载: 导出CSV

    表  5  Burgers模型的黏弹性指标(−18 ℃)

    Table  5.   Burgers model of viscoelastic index (−18 ℃)

    沥青类型E1/MPaη1/(MPa•s)E2/MPaη2/(MPa•s)λ/sτ/sa/%
    ESSO70910225334115835 847247.631.046.1
    10AER53674 56345914 876139.132.461.3
    15AER42648 76834111 406114.533.467.5
    20AER35137 5412698567107.031.873.1
    10AER2SBS63887 56855417856137.332.262.4
    10AER3SBS53276 75146716 025144.334.363.5
    10AER4SBS54166 87944915 891123.635.466.9
    15AER3SBS48358 45742114 265121.033.967.4
    20AER3SBS47251 02538413 178108.134.372.5
    下载: 导出CSV

    表  6  沥青各官能团指数结果

    Table  6.   Results of various functional groups of asphalt

    沥青类型状态ISIBIS=OIC=O IAIARIAL
    ESSO70# O 0.00 0.06 0.69 0.01 30.32 15.21 3.98
    R 0.00 0.07 0.65 0.08 30.78 15.11 3.67
    P 0.00 0.11 0.78 1.06 30.56 14.89 3.41
    10AER O 0.00 0.53 0.91 0.31 32.21 15.02 3.15
    R 0.00 0.27 0.56 0.17 32.34 14.76 3.16
    P 0.00 0.43 0.45 1.12 32.33 14.55 3.26
    15AER O 0.00 0.48 0.62 0.00 33.17 14.91 3.11
    R 0.00 0.39 0.54 0.03 32.68 14.45 3.13
    P 0.00 0.51 0.53 0.71 32.72 14.68 3.11
    20AER O 0.00 0.49 0.53 0.00 33.63 14.83 2.81
    R 0.00 0.52 0.48 0.00 33.59 14.79 2.82
    P 0.00 0.55 0.55 0.71 33.13 14.73 2.73
    10AER2SBS O 0.53 1.05 0.59 0.09 32.09 14.43 3.30
    R 0.57 1.09 0.61 0.25 32.13 14.31 3.27
    P 0.60 1.02 0.53 1.01 31.27 14.39 3.35
    10AER3SBS O 0.71 1.21 0.68 0.11 32.24 14.37 3.24
    R 0.80 1.47 0.69 0.21 32.05 14.32 3.26
    P 0.93 1.41 0.63 0.94 31.31 14.34 3.28
    10AER4SBS O 0.71 1.19 0.67 0.19 32.14 14.33 3.29
    R 1.13 2.04 0.64 0.06 32.06 14.11 3.20
    P 1.19 1.69 0.51 0.92 31.08 14.34 3.36
    15AER3SBS O 0.91 1.54 0.58 0.01 32.35 14.31 3.12
    R 0.95 1.56 0.56 0.13 32.38 14.29 3.11
    P 0.97 1.42 0.54 0.91 31.63 14.25 3.11
    20AER3SBS O 0.93 1.51 0.56 0.00 33.07 14.30 2.91
    R 0.94 1.76 0.64 0.00 33.71 13.94 2.80
    P 1.01 1.47 0.51 1.00 31.96 14.11 2.91
     注:IB 为丁二烯指数;IS=O 为亚砜指数;IC=O 为羰基指数.
    下载: 导出CSV

    表  7  黏弹性指标的相关性结果(−18 ℃)

    Table  7.   Correlation results of viscoelasticity index (−18 ° C)

    指数S/MPamS/m/MPaT/℃E1/MPaη1/(MPa•s)E2/MPaη2/(MPa•s)λ/sτ/sa/%
    低温温度−0.968−0.961−0.93310.9870.9330.9350.9560.912−0.6150.598
    IS−0.118−0.0550.212−0.0780.307−0.156−0.112−0.056−0.2570.4640.287
    IB0.1540.2050.478−0.323−0.254−0.421−0.410−0.364−0.5190.6120.364
    IS=O−0.541−0.536−0.6970.6210.5080.7010.6780.6790.732−0.5320.301
    IC=O−0.846−0.834−0.8480.8360.7680.8560.8480.8560.848−0.5330.515
    IA0.9610.846−0.879−0.902−0.913−0.821−0.842−0.875−0.8120.425−0.578
    IAR0.269−0.016−0.176−0.484−0.251−0.117−0.136−0.126−0.014−0.225−0.515
    IAL−0.878−0.9380.8810.8110.8380.8430.8970.9090.927−0.6160.554
    下载: 导出CSV
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  • 收稿日期:  2018-11-15
  • 修回日期:  2019-03-20
  • 网络出版日期:  2019-04-04
  • 刊出日期:  2021-02-01

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