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摘要: 为了很好地反映沥青的使用状态, 优化和改进沥青高温性能指标, 应用灰色关联度法计算了原样沥青60℃粘度和改性沥青135℃粘度以及实测软化点与SHRP动态剪切试验所得的车辙因子及国内目前常用的几种沥青高温指标间的关联度。结果表明, 原样沥青60℃粘度与车辙因子相关性比较好, 达到0.800以上, 改性沥青135℃粘度与车辙因子相关性比较差; 对于短期老化后, 原样沥青60℃粘度和改性沥青135℃粘度都与车辙因子关联性比较好, 最高达到0.879, 而实测软化点与各项沥青指标的关联度都不是很好; 实测软化点和SHRP沥青高温性能指标仍存在着差异。因此车辙因子不能用来反映改性沥青的高温性能, 可以用短期老化后的沥青车辙因子来反映改性沥青的高温性能, 实测软化点本身作为评价沥青高温性能的指标还有待于进一步研究。Abstract: In order to improve the high-temperature performance indexes of asphalt, the theory of grey relation degree was applied to calculate the relation degrees between 60 ℃ asphalt viscosity, 135 ℃ modified asphalt viscosity, their softening points and asphalt G*/sinδ, other high-temperature performance indexes.It is pointed that the relation degree between 60 ℃ asphalt viscosity and asphaltG*/sinδ is better, the value reaches above 0.800, the relation degrees between 60 ℃ asphalt viscosity, 135 ℃ modified asphalt viscosity by short-term aging and asphalt G*/sinδ are also better, the maximum value is 0.897, but the relation degrees between softening point and other high-temperature performance indexes are not better.The result indicates that asphalt G*/sinδ cann't reflect the high-temperature performance of modified asphalt, but asphalt G*/sinδ by short-term aging may reflect the performance, softening point used to evaluate the high-temperature performance of asphalt need further research.
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表 1 原样沥青与改性沥青试验结果
Table 1. Asphalt and modified asphalt test result
沥青样本 60 ℃粘度 135 ℃粘度 G*·sin-1δ/kPa 针入度/10-1mm PI T800/℃ TR & B/℃ 原样沥青135 ℃粘度/ (Pa·s) PR 58 ℃ 64 ℃ 25 ℃ 壳牌70# 206 0.44 2.11 0.97 65.3 -1.735 45.48 45.5 0.44 11.26 泰普克90# 152 0.32 1.44 0.65 93.3 -2.074 41.98 42.8 0.32 12.96 改性壳70# - 1.49 4.10 2.16 58.1 -1.045 48.96 47.3 0.44 8.67 改性泰90# - 1.22 4.78 2.62 57.1 -1.379 47.54 52.3 0.32 9.85 X0 X0 X1 X2 X3 X4 X5 X6 X7 X8 
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表 2 原样沥青与改性沥青RTFOT后残留沥青试验结果
Table 2. Asphalt and modified asphalt test result after RTFOT aging
沥青样本 60 ℃粘度 135 ℃粘度 G*·sin-1δ/kPa 针入度/10-1mm PI T800/℃ TR & B/℃ 基质沥青135 ℃粘度/ (Pa·s) PR 58 ℃ 64 ℃ 70 ℃ 25 ℃ 壳牌70# 206 0.44 5.22 2.39 1.14 65.3 -1.735 45.48 45.5 0.44 11.26 泰普克90# 152 0.32 3.36 1.42 0.65 93.3 -2.074 41.98 42.8 0.32 12.96 改性壳70# - 1.49 8.62 4.82 2.78 58.1 -1.045 48.96 47.3 0.44 8.67 改性泰90# - 1.22 8.71 4.70 2.66 57.1 -1.379 47.54 52.3 0.32 9.85 X0 X0 X1 X2 X3 X4 X5 X6 X7 X8 X9
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表 3 原样沥青与改性沥青PAV后残留沥青试验结果
Table 3. Asphalt and modified asphalt test result after RTFOT aging
沥青样本 60 ℃粘度 135 ℃粘度 G*·sin-1δ/kPa 针入度/10-1mm PI T800/℃ TR & B/℃ 基质沥青135 ℃粘度/ (Pa·s) PR 58 ℃ 64 ℃ 70 ℃ 76 ℃ 25 ℃ 壳牌70# 206 0.44 26.9 11.3 4.81 2.09 65.3 -1.735 45.48 45.5 0.44 11.26 泰普克90# 152 0.32 12.7 4.88 2.03 0.90 93.3 -2.074 41.98 42.8 0.32 12.96 改性壳70# - 1.49 19.4 9.80 5.32 2.94 58.1 -1.045 48.96 47.3 0.44 8.67 改性泰90# - 1.22 21.3 10.0 4.74 2.36 57.1 -1.379 47.54 52.3 0.32 9.85 X0 X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10
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表 4 原样沥青与改性沥青RTFOT+PAV后残留沥青试验结果
Table 4. Asphalt and modified asphalt test result after RTFOT+PAV aging
沥青样本 60 ℃粘度 135 ℃粘度 G*·sin-1δ/kPa 针入度/10-1mm PI T800/℃ TR & B/℃ 基质沥青135 ℃粘度/ (Pa·s) PR 58 ℃ 64 ℃ 70 ℃ 76 ℃ 25 ℃ 壳牌70# 206 0.44 33.38 13.95 5.88 2.60 65.3 -1.735 45.48 45.5 0.44 11.26 泰普克90# 152 0.32 14.75 5.11 2.15 0.94 93.3 -2.074 41.98 42.8 0.32 12.96 改性壳70# - 1.49 34.97 18.18 9.64 5.22 58.1 -1.045 48.96 47.3 0.44 8.67 改性泰90# - 1.22 23.30 11.07 5.34 2.70 57.1 -1.379 47.54 52.3 0.32 9.85 X0 X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10
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表 5 原样沥青各指标与沥青60 ℃粘度关联度分析结果
Table 5. Relation degrees of 60 ℃ asphalt viscosity and other indexes of high-temperature performance
项目 G*·sin-1δ/kPa 针入度/10-1mm PI T800/℃ TR & B/℃ 135 ℃粘度/ (Pa·s) PR 58 ℃ 64 ℃ 70 ℃ 76 ℃ 25 ℃ 关联度 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 原样沥青 0.847 0.812 - - 0.348 0.423 0.622 0.601 1.000 0.444 RTFOT沥青 0.762 0.661 0.619 - 0.370 0.346 0.645 0.625 1.000 0.468 PAV沥青 0.460 0.417 0.407 0.416 0.348 0.423 0.622 0.601 1.000 0.444 RTFOT+PAV沥青 0.427 0.358 0.358 0.354 0.348 0.423 0.622 0.601 1.000 0.444
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表 6 改性沥青各指标与沥青135 ℃粘度关联度分析结果
Table 6. Relation degrees of 135 ℃ modified asphalt viscosity and other indexes of high-temperature performance
项目 G*·sin-1δ/kPa 针入度/10-1mm PI T800/℃ TR & B/℃ 135 ℃粘度/ (Pa·s) PR 58 ℃ 64 ℃ 70 ℃ 76 ℃ 25 ℃ 关联度 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 改性沥青 0.600 0.563 - - 0.844 0.497 0.869 0.659 1.000 0.627 RTFOT沥青 0.750 0.830 0.879 - 0.811 0.603 0.840 0.604 1.000 0.571 PAV沥青 0.401 0.478 0.740 0.654 0.530 0.437 0.549 0.395 1.000 0.373 RTFOT+PAV沥青 0.607 0.675 0.578 0.525 0.844 0.497 0.869 0.659 1.000 0.627
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表 7 沥青各指标与实测软化点关联度分析结果
Table 7. Relation degrees of softening point and other indexes of high-temperature performance
项目 项目 G*·sin-1δ/kPa 针入度/10-1mm PI T800/℃ 135 ℃粘度/ (Pa·s) PR 58 ℃ 64 ℃ 70 ℃ 76 ℃ 25 ℃ 关联度 r1 r2 r3 r4 r5 r6 r7 r9 r10 原样沥青 未改性沥青 0.432 0.418 - - 0.364 0.506 1.000 0.489 0.553 改性沥青 0.901 0.783 - - 0.722 0.613 0.696 0.377 1.000 RTFOT沥青 未改性沥青 0.426 0.379 0.359 - 0.399 0.543 1.000 0.526 0.589 改性沥青 0.789 0.705 0.667 - 0.722 0.614 0.696 0.377 1.000 PAV沥青 未改性沥青 0.383 0.356 0.350 0.355 0.500 0.642 1.000 0.626 0.684 改性沥青 1.000 0.695 0.444 0.348 0.601 0.498 0.576 0.375 0.893 RTFOT+PAV沥青 未改性沥青 0.397 0.350 0.350 0.348 0.536 0.675 1.000 0.660 0.715 改性沥青 0.455 0.414 0.379 0.358 0.813 0.728 0.794 0.504 1.000
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