
高原高海拔地区道路石油沥青再生特性及其机理研究
马鹏飞, 朱晨旭, 常明丰, 赖淏, 熊锐
高原高海拔地区道路石油沥青再生特性及其机理研究
Study on Regeneration Characteristics and Mechanism of Road Petroleum Asphalt in High Altitude Regions of Plateau
为研究高原高海拔地区老化沥青的再生性能和再生机理,制备7种不同再生剂掺量的再生沥青,借助动态剪切流变试验(DSR)、弯曲梁流变试验(BBR)评价再生沥青性能。采用傅里叶变换红外光谱仪(FT-IR)及原子力显微镜(AFM)对老化沥青和不同再生剂掺量的再生沥青进行测试,以分析其再生机理。结果表明:随着再生剂XT-3掺量的增加,再生沥青的针入度与延度随着掺量的增加波动较大,在XT-3质量分数为7.0%时,针入度和延度达到最大值;软化点在XT-3质量分数为7.0%时,测试值最小,复数模量先减小后上升,相位角先增大后减小,车辙和疲劳因子先上升后下降,蠕变速率先下降后上升。再生沥青的表面粗糙度皆大于老化沥青,红外光谱的结果显示再生剂并未与沥青发生化学反应。综合考虑再生沥青的路用性能,再生剂的最佳掺杂质量分数为7.0%。
In order to study the regeneration performance and mechanism of aged asphalt in high altitude regions of plateau, seven kinds of reclaimed asphalt with different regenerant contents were prepared. The properties of reclaimed asphalt were evaluated by the dynamic shear rheological test (DSR) and bending beam rheological test (BBR). The Fourier transform infrared spectrometer (FT-IR) and atomic force microscope (AFM) were used to analyze the recycling mechanism of aged asphalt and reclaimed asphalt with different regenerant contents. The results show that with the increase of regenerant XT-3 mass fraction, the penetration and ductility of reclaimed asphalt fluctuate greatly with the increase of the content, and the penetration and ductility reach the maximum value when the XT-3 mass fraction is 7.0%. When the XT-3 mass fraction is 7.0%, the test value of the softening point is the smallest. The complex modulus first decreases and then increases, and the phase angle first increases and then decreases. The rutting factor and fatigue factor first increase and then decrease, and the creep speed first decrease and then increase. The surface roughness of reclaimed asphalt is greater than that of aged asphalt, and the infrared spectrum results show that there is no chemical reactions between the regenerant and the asphalt. Considering the road performance of reclaimed asphalt, the optimum mass fraction of regenerant is 7.0%.
道路工程 / 回收沥青路面材料 / 老化沥青 / 再生剂 / 再生机理
Road engineering / Reclaimed asphalt pavement / Aged asphalt / Regenerant / Recycling mechanism
U414
1 |
赖淏,翟健梁,毛楠,等.干湿循环作用下SBS改性沥青及其混合料老化行为分析[J].公路,2023,68(5):307-313.
|
2 |
李闯,熊锐,李松,等.盐蚀-动水条件下沥青混合料性能损伤评价[J].材料科学与工程学报,2022,40(2):300-305.
|
3 |
|
4 |
|
5 |
马峰,王正,傅珍,等.紫外吸收剂/环烷油对高寒区SBS沥青路面的性能影响[J].应用化工,2024,53(1):58-62.
|
6 |
7 |
田耀刚,覃超,张梦缘,等.温拌SBS改性再生沥青混合料的路用性能研究[J].应用化工,2024,53(5):1031-1035.
|
8 |
冯新军,傅豪,段湖杰.萃取法生物油基再生沥青性能及再生机理[J].长安大学学报:自然科学版,2024,44(2):12-21.
|
9 |
|
10 |
|
11 |
舒明旺.混合再生沥青混合料路基土工程特性研究[J].施工技术:中英文,2024,53(9):28-33.
|
12 |
张婷婷,茹沛泽.回收微塑料制备改性沥青混凝土及其性能研究[J].塑料科技,2024,52(1):28-32.
|
13 |
|
14 |
|
15 |
梁庆,郑云,张关发,等.废机油再生SBS改性沥青性能及再生机理[J].科学技术与工程,2023,23(2):777-784.
|
16 |
李永琴,梁春雨,高学凯.植物油再生沥青流变特性及机理分析[J].材料科学与工艺,2023,31(6):44-50.
|
17 |
余乐,何兆益,李晓民,等.植物基生物再生沥青的路用性能及再生机理研究[J].应用化工,2024,53(4):791-796.
|
18 |
索智,聂磊,向繁荣,等.废植物油冷再生RAP中老化沥青性能影响研究[J].公路,2022,67(8):334-339.
|
/
〈 |
|
〉 |