Journal of Jilin University(Engineering and Technology Edition) ›› 2024, Vol. 54 ›› Issue (10): 2849-2858.doi: 10.13229/j.cnki.jdxbgxb.20221538

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Durability of AC-16 asphalt mixture under vibration molding design

Ying-jun JIANG1(),Hong-jian SU1,Ming-jie LI2,Yan HE3,Ya-wei BAI4,Peng-fei WANG5,Yu-hao BAO1,Min-feng CAI1   

  1. 1.Key Laboratory of Highway Engineering in Special Areas，Ministry of Education，Chang'an University，Xi'an 710064，China
    2.Transportation Infrastructure Quality Inspection Station of Henan Province，Zhengzhou 450005，China
    3.Xuchang City Highway Development Center，Xuchang 461670，China
    4.Jinhua Communications Investment Group Co. ，Ltd. ，Jinhua 321017，China
    5.China Communications Second Office Dongmeng Co. ，Ltd. ，Xi'an 710119，China
  • Received:2022-12-02 Online:2024-10-01 Published:2024-11-22

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Abstract:

In order to demonstrate the durability of asphalt mixture designed by vertical vibration method （VTM） under the environment of light and repeated load， this paper firstly compares the mechanical properties of AC-16 mixture formed by VTM method， Marshall method and rotary compaction method （GTM）. The anti-aging performance and fatigue resistance characteristics of VTM and Marshall design methods were deeply analyzed. The fatigue equation was established by Weibull distribution， and the fatigue life was compared. The results show that VTM forming specimens have the characteristics of high compactness， low porosity and ore gap ratio. The mechanical properties of GTM and VTM asphalt mixture are at least 35% higher than those of Marshall. GTM method， VTM method， Marshall method and field correlation were 94%， 92% and 72%， respectively. After aging， the low temperature performance of asphalt mixture designed by the two methods is similar. After short-term aging， the performance of VTM design asphalt mixture recovery asphalt changes more than Marshall's； After long-term aging VTM design asphalt mixture recovery asphalt performance changes less than Marshall； Weibull model presented good linear correlation. The fatigue resistance of asphalt mixture based on VTM design is better than Marshall method under different failure probabilities.

Key words: highway and railway engineering, asphalt mixture, vertical vibration method, marshall law, lasting quality

CLC Number: 

  • U416

Table 1

SBS （I-C） modified asphalt technical indicators"

技术指标针入度（25 ℃，5 s，100 g）/0.1 mm延度（5 cm/min，5 ℃）/cm软化点（环球法）/℃运动黏度（135 ℃）/（Pa·s）
规范要求60~80≥30≥55≤3.0
试验结果6636.870.52.138

Table 2

Fine aggregate technical indicators"

技术指标表观相对密度砂当量/%小于0.075 mm含量/%棱角性/s
规范要求≥2.5≥60≤12≥30
试验结果2.69580.37.243.4

Table 3

Coarse aggregate technical indicators"

技术指标压碎值/%洛杉矶磨耗值/%表观相对密度毛体积相对密度吸水率/%
规范要求≤20≤28≥2.6—≤2.0
粒径/mm9.5~1614.719.22.8912.8630.34
4.75~9.52.8942.8560.46
2.36~4.752.9162.7701.81

Table 4

AC-16 asphalt mixture grading"

筛孔/mm191613.29.54.752.361.180.60.30.150.075
通过质量百分率/%10098.180.173.838.230.821.415.59.97.66.5

Table 5

VTE vibration parameters"

工作频率/Hz名义振幅/mm工作质量/kN
上车系统下车系统总质量
37±21.21.21.83.0

Table 6

AC-16 design standards for different methods of asphalt mixture"

设计方法试件尺寸（直径×高度）/mm体积指标力学指标GTM指标
VV/%VFA/%VMA/%MS/kNFL/mmτd/MPaσ/MPaGSIGSF
VTM100×63.52.6~4.068~80≥1≥12.51.5~4.0>1.25>4.0
Marshall101.6×63.53.0~5.065~75≥13≥81.5~4.0——
GTM101.6×101.6———————≤1.05≥1.3

Table 7

Results of AC-16 asphalt mixture designed by different methods"

设计方法最佳油石比/%毛体积相对密度VV/%VMA/%VFA/%τd/MPaσ/MPaGSIGSF
VTM4.02.5762.811.775.71.4914.13——
Marshall4.42.5304.113.669.8————
GTM4.02.5862.511.478.3——1.031.46

Fig.1

Mechanical properties of asphalt mixture under different design methods"

Table 8

Low temperature bending test results of asphalt mixture designed by different methods after aging"

老化程度检测指标T单位TVTMTV/TM
原样RBMPa13.2711.311.173
εBμε×10-62 5492 7230.936
短期老化RBMPa13.4312.281.094
εBμε×10-62 4372 5160.969
长期老化RBMPa13.6012.311.105
εBμε×10-62 3322 4380.956

Table 9

Performance of asphalt recycled asphalt designed by different methods after aging"

检测

对象

检测指标T单位TVTMTV/ TM
原样25 ℃针入度0.1 mm66661.000
5 ℃延度cm36.836.81.000
软化点℃70.570.51.000
135 ℃黏度Pa·s2.1382.1381.000

短期

老化

25 ℃针入度0.1 mm37.738.90.969
5 ℃延度cm29.430.50.964
软化点℃87.585.01.029
135 ℃黏度Pa·s2.3372.3050.988

长期

老化

25 ℃针入度0.1 mm28.627.71.032
5 ℃延度cm21.220.01.060
软化点℃95.597.00.985
135 ℃黏度Pa·s2.4552.5050.980

Table 10

Trabecular bending test results"

方法PB/NRB/MPa
VTM1 1555.414
Marshall9784.585

Table 11

Fatigue test data of AC-16 asphalt mixture designed by different methods"

方法不同S对应的疲劳寿命N/次
S′=0.3S′=0.4S′=0.5S′=0.6S′=0.7
Marshall14 5323 8461 235598322
15 5114 1551 438677368
16 9034 5831 566784403
18 3154 8701 875838441
20 4785 1221 9231 024472
VTM20 3756 9822 7851 075534
22 0837 5292 9131 186590
23 7557 9383 2171 276604
25 3787 6413 3051 348674
26 0428 8653 5181 502705

Fig.2

Weibull fitting of fatigue data of asphalt mixture designed by different methods"

Table 12

Weibull distribution test results"

方法系数不同S对应N的Weibull分布模型回归系数
S′=0.3S′=0.4S′=0.5S′=0.6S′=0.7
Marshallα6.422 47.561 44.703 54.263 55.878 6
β63.02 764.04 935.11 828.62135.646
R20.961 20.988 70.967 80.966 50.998 5
VTMα8.721 68.932 29.169 36.945 07.881 0
β88.21 580.69074.27950.08951.111
R20.986 70.980 70.967 10.985 30.966 3

Table 13

Equivalent fatigue life under different failure probabilities"

方法

设计

失效概率P/%不同S对应的等效疲劳寿命Nˉ
S′=0.3S′=0.4S′=0.5S′=0.6S′=0.7
Marshall511 5123 222930410259
1012 8773 5441 083486293
2014 4733 9131 271579333
3015 5704 1641 404646361
4016 4664 3661 516703384
5017 2674 5461 617755404
VTM517 5716 0092 385884450
1019 0826 5142 580981493
2020 7977 0852 8001 093542
3021 9467 4672 9471 169575
4022 8697 7733 0641 231602
5023 6838 0433 1681 286626

Fig.3

VTM and Marshall fatigue equation at P=50%"

Table 14

Regression coefficient of fatigue equation"

设计方法系数不同失效概率P疲劳方程回归系数和相关系数
5%10%20%30%40%50%
Marshalla3.7653.9324.1044.2134.2964.365
b4.6234.5734.5234.4914.4664.447
R20.9940.9960.9970.9980.9990.999
VTMa4.6124.7144.8184.8844.9344.977
b4.3694.3514.3324.3204.3114.303
R20.9950.9940.9960.9960.9960.997
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