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浙江大学学报(工学版)
Journal of ZheJiang University (Engineering Science)  2021, Vol. 55 Issue (1): 38-45    DOI: 10.3785/j.issn.1008-973X.2021.01.005
    
High temperature properties of SBS modified asphalt mastics in high temperature and high humidity salt environment
Qin-ling ZHANG1,2(),Zhi-yi HUANG1,*()
1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
2. College of Water Conservancy and Architecture Engineering, Tarim University, Alar 843300, China
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Abstract  

The temperature scanning test and multiple stress repeated creep recovery (MSCR) test of SBS modified asphalt mastics were conducted by using dynamic shear rheometer based on the self-designed indoor salt erosion and dry-wet cycle test. The unrecoverable creep compliance (Jnr,3.2) at the stress level of 3.2 kPa was used as the evaluation index of high-temperature rheological properties of the mastics. The coupling effects of environment and dry-wet cycles on the rheological properties of the mastics were analyzed. The grey correlation theory was used to explore the correlation between Jnr,3.2 and conventional rheological parameter, dry-wet cycles and test environment. The complex shear modulus, rutting factor and Jnr,3.2 showed an increasing trend with the increase of dry-wet cycles, while the phase angle and creep recovery rate showed a decreasing trend. The sulfate environment has the greatest influence on the high temperature performance of asphalt mastics under the same test conditions. Jnr,3.2 has the largest grey correlation with improved rutting factor and test environment, and the correlation coefficient is greater than 0.93. It is suggested that the method of daily cleaning and regular watering should be adopted to reduce the accumulation of salt and improve the resistance to deformation of asphalt pavement in high temperature and humidity environment.

Key words： road engineering      SBS modified asphalt mastics      high temperature rheological property      multiple stress repeated creep recovery (MSCR)      grey relational theory     
Received: 09 February 2020      Published: 05 January 2021
CLC:  U 414  
Corresponding Authors: Zhi-yi HUANG     E-mail: zhqling@zju.edu.cn;hzy@zju.edu.cn
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Cite this article:

Qin-ling ZHANG,Zhi-yi HUANG. High temperature properties of SBS modified asphalt mastics in high temperature and high humidity salt environment. Journal of ZheJiang University (Engineering Science), 2021, 55(1): 38-45.

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http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2021.01.005     OR     http://www.zjujournals.com/eng/Y2021/V55/I1/38


高温高湿盐环境下SBS改性沥青胶浆的高温性能

基于自行设计的室内盐蚀干湿循环试验，采用动态剪切流变仪，对SBS改性沥青胶浆进行温度扫描试验和多重应力重复蠕变恢复(MSCR)试验. 以3.2 kPa应力下的不可恢复蠕变柔量Jnr,3.2为胶浆高温流变性能评价指标，分析试验环境和干湿循环耦合作用对胶浆流变性能的影响. 采用灰色关联理论，探究Jnr,3.2与常规流变参数、干湿循环次数及试验环境之间的关联性. 结果表明，随着盐蚀干湿循环次数的增加，胶浆的复数切变模量、车辙因子及Jnr,3.2均呈增大趋势，相位角和蠕变恢复率呈减小趋势. 在同种试验条件下，硫酸盐环境对胶浆高温性能的影响最大. Jnr,3.2与改进型车辙因子、试验环境的灰色关联度最大，关联度系数均大于0.93. 建议采用日常清扫、定期洒水冲洗的方式来减小路面盐分的积累，提高高温高湿环境中沥青路面的抵抗变形的能力.


关键词： 道路工程,  SBS改性沥青胶浆,  高温流变性能,  多应力重复蠕变恢复(MSCR),  灰色关联理论 
技术指标 试验值 规范值 试验方法
针入度(25 °C, 100 g, 5 s)/0.1 mm 55 40~60 T 0604
软化点/°C 86.6 ≥60 T 0606
延度(5 °C, 5 cm/min)/cm 31.5 ≥20 T 0605
动力黏度(135 °C)/(Pa·s) 2.5 $\leqslant 3$ T 0739
闪点/°C 320 ≥230 T 267
TFOT后质量变化率/% 0.08 ≤1 T 5304
TFOT后延度变化值(5 °C，5 cm/min)/cm 71.6 ≥65 T 4509
TFOT后针入度比(25 °C)/% 17.3 ≥15 T 0603
Tab.1 Properties of SBS asphalt binders
技术指标 测试值 规范值 试验方法
ρ/(g·cm?3) 2.765 ≥2.50 T 0352
ww/% 0.49 ≤1 T 0332
w1/% 100 100 T 0351
w2/% 95.23 90~100 T 0351
w3/% 85.91 75~100 T 0351
α 0.68 <1 T 0353
Tab.2 Properties of mineral filler
Fig.1 Test scheme of salt corrosion dry-wet cycles for SBS-modified mastics
Fig.2 Typical creep and recovery curves cycle in MSCR test
Fig.3 Complex modulus of SBS-modified mastics with temperature in different test environment
Fig.4 Phase angle of SBS-modified mastics with temperature in different test environment
Fig.5 Rutting factor of SBS-modified mastics with temperature in different test environment
Fig.6 Creep and recovery curves of SBS-modified asphalt mastics under different stresses (control group)
Fig.7 Creep recovery rate and unrecoverable creep compliance of SBS modified asphalt mastic under different stresses
试验环境 ${ {{X} } }_{0}^{*}/{\rm{kPa}}^{-1}$ ${ {{X} } }_{1}^{*}/{\rm{kPa} }$ ${ {{X} } }_{2}^{*}/{\rm{kPa} }$ ${ {{X} } }_{3}^{*}$ ${ {{X} } }_{4}^{*}/ {\text{%}}$
清水 3.9884 124.67 161.114 8 0
清水 4.1979 148.17 187.338 15 0
清水 4.5989 171.92 189.430 25 0
5% NaCl 4.0955 130.99 205.066 8 5%
5% NaCl 4.2978 157.66 208.427 15 5%
5% NaCl 4.3531 182.11 227.889 25 5%
5% Na2SO4 4.2857 151.80 209.869 8 5%
5% Na2SO4 4.5348 189.44 214.709 15 5%
5% Na2SO4 4.7676 227.96 272.884 25 5%
Tab.3 Raw data of gray correlation analysis of various factors
${{{X}}}_{0}$ ${{{X}}}_{1}$ ${{{X}}}_{2}$ ${{{X}}}_{3}$ ${{{X}}}_{4}$
1 1 1 1 1
1.05250 1.1885 1.1628 1.875 1
1.15307 1.3790 1.1757 3.125 1
Tab.4 Reference sequence and comparison sequence after initialization in water environment
${{{X}}}_{1}$ ${{{X}}}_{2}$ ${{{X}}}_{3}$ ${{{X}}}_{4}$
0 0 0 0
0.1360 0.1102 0.8225 0.0525
0.2259 0.0227 1.9719 0.1531
Tab.5 Absolute value of difference sequence in water environment
${{{X}}}_{1}$ ${{{X}}}_{2}$ ${{{X}}}_{3}$ ${{{X}}}_{4}$
1 1 1 1
0.91930 0.8994 0.5452 0.9494
0.87275 0.9775 0.3333 0.8656
Tab.6 Grey correlation coefficient in water environment
试验环境 ${{{X}}}_{1}$ ${{{X}}}_{2}$ ${{{X}}}_{3}$ ${{{X}}}_{4}$
清水 0.8974 0.9589 0.6262 0.9383
5% NaCl 0.7980 0.9527 0.5322 0.9364
5% Na2SO4 0.8541 0.9363 0.6284 0.9483
Tab.7 Grey correlation between rutting factors and various factors under different test environments
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