| 龚芳媛,程雪佼,方冰杰,拜佳威.C9石油树脂对3D打印沥青性能影响研究[J].,2023,63(4):399-407 |
| C9石油树脂对3D打印沥青性能影响研究 |
| Study of effect of C9 petroleum resin on properties of 3D printed asphalt |
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| DOI：10.7511/dllgxb202304010 |
| 中文关键词: 道路工程 3D打印沥青 C9石油树脂 性能研究 |
| 英文关键词: road engineering 3D printed asphalt C9 petroleum resin properties study |
| 基金项目:国家自然科学基金资助项目(52008154)；河北省自然科学基金资助项目(E2021202074)；天津市自然科学基金资助项目(20JCQNJC00930). |
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| 中文摘要: |
| SBS/胶粉复合改性3D打印沥青作为裂缝修补材料存在相容性不足的问题．为改善其储存稳定性并保证其高温性能，选用不同掺量的C9石油树脂对3D打印沥青进行改性．根据针入度、软化点、延度、锥入度、弹性恢复率、177 ℃旋转黏度等试验，研究C9石油树脂对3D打印沥青物理性能的影响；采用离析试验评价C9石油树脂对3D打印沥青相容性的影响；通过温度扫描试验和多重应力蠕变恢复试验探究C9石油树脂对3D打印沥青流变性能的影响；借助傅里叶变换红外光谱仪和荧光显微镜进一步分析3D打印沥青微观结构．宏、微观试验结果表明，当C9石油树脂掺量从0%增加至4%，3D打印沥青的针入度和锥入度分别减小5.7%和6.3%，软化点和177 ℃旋转黏度分别提升1.25 ℃和0.42 Pa·s，延度和弹性恢复率小幅降低；3D打印沥青的48 h软化点差值从6.7 ℃降至1.6 ℃，相容性得到有效改善；3D打印沥青的高温稳定性和抗永久变形能力增强；3D打印沥青中芳香酚含量增加，聚合物改性剂均匀分布、充分结合形成更稳固的空间结构，此过程主要表现为物理改性．推荐3D打印沥青中C9石油树脂的最佳掺量为4%． |
| 英文摘要: |
| The SBS/CR (styrene-butadiene-styrene/crumb rubber) composite modified 3D printed asphalt is a crack sealant with poor compatibility. In order to improve its storage stability and ensure its high temperature performance, different dosages of C9 petroleum resin are used to modify 3D printed asphalt. According to the needle penetration, softening point, ductility, cone penetration, elastic recovery rate and rotational viscosity at 177 ℃ tests, effect of C9 petroleum resin on physical properties of 3D printed asphalt is investigated. Segregation test is conducted to analyze the influence of C9 petroleum resin on the compatibility of 3D printed asphalt. The influence of C9 petroleum resin on rheological properties of 3D printed asphalt is evaluated by temperature scan test and multiple stress creep recovery test. And the characteristics of 3D printed asphalt microstructure are indicated by Fourier transform infrared spectroscopy and fluorescence microscope. The results of micro and macro tests show that when the dosage of C9 petroleum resin is increased from 0% to 4%, the needle penetration and cone penetration of 3D printed asphalt are reduced by 5.7% and 6.3%, respectively; the softening point and rotational viscosity at 177 ℃ are increased by 1.25 ℃ and 0.42 Pa·s, respectively; while the ductility and elastic recovery rate decrease slightly. The 48 h softening point difference of 3D printed asphalt decreases from 6.7 ℃ to 1.6 ℃ and the compatibility is effectively improved. The high temperature stability and resistance to permanent deformation of 3D printed asphalt are enhanced; with the increase of aromatic content in 3D printed asphalt, the polymer modifiers are distributed uniformly and combined to form a more stable spatial structure, the physical modification mainly occurs in this process. In conclusion, 4% of C9 petroleum resin is recommended as the optimum dosage in 3D printed asphalt. |
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