吉林大学学报(工学版) ›› 2022, Vol. 52 ›› Issue (3): 541-549.doi: 10.13229/j.cnki.jdxbgxb20200846

• 材料科学与工程 • 上一篇    

用于高模量沥青砼的复合改性硬质沥青低温性能

夏全平1,2(),高江平1(),罗浩原3,张其功4,李志杰5,杨飞6   

  1. 1.长安大学 公路学院，西安 710064
    2.山东省交通运输事业服务中心，济南 250002
    3.东南大学 交通学院，南京 211189
    4.东营市公路事业发展中心，山东 东营 257091
    5.山东景建集团公司，山东 潍坊 262100
    6.山东省交通科学研究院，山东 济南 250031
  • 收稿日期:2020-11-03 出版日期:2022-03-01 发布日期:2022-03-08
  • 通讯作者: 高江平 E-mail:xiaquanping@163.com;2227940211@qq.com
  • 作者简介:夏全平（1988-），男，博士研究生.研究方向：路面工程材料. E-mail：xiaquanping@163.com
  • 基金资助:
    国家自然科学基金项目(51008033)

Low⁃temperature performance of composite modified hard asphalt used in high modulus asphalt concrete

Quan-ping XIA1,2(),Jiang-ping GAO1(),Hao-yuan LUO3,Qi-gong ZHANG4,Zhi-jie LI5,Fei YANG6   

  1. 1.Highway School，Chang'an University，Xi'an 710064，China
    2.Shandong Transportation Service Center，Jinan 250002，China
    3.School of Transportation，Southeast University，Nanjing 211189，China
    4.Dongying Highway Development Center，Dongying 257091，China
    5.Shandong Jingjian Group Co. ，Ltd. ，Weifang 262100，China
    6.Shandong Academy of Communications Sciences，Jinan 250031，China
  • Received:2020-11-03 Online:2022-03-01 Published:2022-03-08
  • Contact: Jiang-ping GAO E-mail:xiaquanping@163.com;2227940211@qq.com

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摘要：

为了寻找高温稳定性良好且具备足够低温抗裂性能的硬质沥青作为高模量沥青混凝土的胶结材料，选取SBS改性沥青对6类天然硬质沥青进行复合改性，进而对复合硬质改性沥青、沥青胶浆、沥青混合料的低温性能进行全面考察。结果表明：经过改性后，沥青、沥青胶浆、沥青混合料的低温性能有了不同程度的改善；在众多低温性能的评价指标中，沥青胶浆的低温临界开裂温度（TCR）与混合料低温弯曲的测试结果最具相关性，在进行高模量沥青混凝土胶结料选择时，应尤其注重对该项指标的考察。

关键词: 道路工程, 高模量沥青混凝土, 硬质沥青, 低温抗裂性能, 抗车辙性能, 界面黏附系数

Abstract:

To find hard asphalts with perfect high temperature stability and low temperature crack resistance as the cementation material of high-modulus asphalt concrete， SBS modified asphalt was used to modify six kinds of natural hard asphalt. The relationship between the dosage of SBS and the dynamic modulus of the mixture was explored. The low-temperature performance of this hard asphalt before and after the modification was investigated from the three levels including asphalt， asphalt mortar and asphalt mixture. The results show that the low temperature performances of the modified asphalt， asphalt mortar， and mixture also have different degrees improvements. It is a good choice for producing high-modulus asphalt concrete. The study also found that among the many low-temperature performance evaluation indicators， low-temperature critical cracking temperature （TCR） of asphalt mortar is the most relevant to the test results of low-temperature bending of the mixture. When selecting asphalt binder for high-modulus asphalt concrete， special attention should be paid to this indicator.

Key words: road engineering, high modulus asphalt concrete, hard asphalt, low temperature crack resistance performance, rutting resistance, interfacial adhesion coefficient

中图分类号: 

  • U414

表1

采用沥青的基本技术指标"

指标沥青型号测试方法
AL-50#IT-50#SP-50#SC-50#XJ-50#TZ-50#SBS-I
25 ℃针入度/（0.1 mm）49.247.061.656.254.142.740.3T0604
针入度指数PI0.8-1.00.1-1.8-0.170.550.31T0604
软化点/℃48.550.647.948.35362.587.5T0606
5 ℃延度/cm（SBS）------35T0605
10 ℃延度/cm7.210.28.017159-T0605
15 ℃延度/cm13.057.013.7＞1008981-T0604
RTFOT质量变化-0.2-0.1-0.1-0.1-0.10.0-0.045T0610
残留针入度59.672.762.5626375.677.2T0604
10 ℃残留延度/cm4.14.84.83脆断脆断-T0605
5 ℃残留延度/cm（SBS）------20T0605
PG分级64-1670-1664-1664-2276-1682-1670-22AASHTO M320
英标针入度分级50/7040/6050/7050/7035/5030/4540/60EN 12591

图1

SBS改性沥青掺量对动态模量的影响"

表2

复合改性沥青的基本技术指标"

指标沥青型号测试方法
AL-SBSIT-SBSSP-SBSSC-SBSXJ-SBSTZ-SBS
25 ℃针入度/（0.1 mm）343032412819T0604
针入度指数PI1.560.910.491.11.210.65T0604
软化点/℃81.185.681.379.69193.6T0606
英标针入度分级30/4530/4530/4530/4520/3010/20EN 12591

图2

六种沥青的低温延度"

图3

六种沥青的PG分级"

图4

6种沥青和沥青胶浆的低温温度应力"

图5

六种沥青和沥青胶浆的临界裂纹开裂温度（TCR）"

图6

六种沥青胶浆中的沥青-矿粉界面黏结能力对比"

表3

六种高模量沥青混凝土的汉堡车辙性能"

沥青样品车辙深度/mm抗车辙性能排名技术要求
AL-50#6.210≤20
IT-50#19 000次后失效12
SP-50#5.37
SC-50#6.29
XJ-50#5.78
TZ-50#4.03
AL-SBS3.72
IT-SBS7.811
SP-SBS4.45
SC-SBS5.16
XJ-SBS4.24
TZ-SBS2.11

表4

六种高模量沥青混合料低温性能的弯曲小梁试验结果"

沥青样品空隙率/%弯曲模量/MPa弯曲破坏应变εB/με低温弯曲性能排名
AL-50#2.8246925607
IT-50#2.63061169411
SP-50#2.53863171610
SC-50#1.8317931255
XJ-50#2.0318619899
TZ-50#2.43059145712
AL-SBS3.7275939982
IT-SBS2.9370328356
SP-SBS2.8357033844
SC-SBS2.5324142011
XJ-SBS2.4301138533
TZ-SBS2.8416724218
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