| 天然橡胶/丁苯橡胶胶粉对改性沥青性能的影响 |
| Effects of NR/SBR Rubber Powder on Properties of Modified Asphalt |
| 投稿时间：2022-04-27 修订日期：2022-04-27 |
| DOI：10.12136/j.issn.1000-890X.2023.10.0789 |
| 中文关键词: 胶粉 天然橡胶 丁苯橡胶 改性沥青 软化点 |
| 英文关键词: rubber powder NR SBR modified asphalt softening point |
| 基金项目:国家自然科学基金资助项目（51502021）；浙江省交通厅科技项目（2021012） |
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| 中文摘要: |
| 将自制的不同用量比的天然橡胶（NR）/丁苯橡胶（SBR）硫化胶淬冷粉碎而制得胶粉，将其用于改性沥青，研究胶粉含量对改性沥青软化点、5 ℃延度、粘度和25 ℃弹性恢复率的影响，并借助灰熵分析探讨胶粉组成对改性沥青软化点的影响。结果表明：随着胶粉含量的增大，改性沥青的软化点呈升高趋势，5 ℃延度和25 ℃弹性恢复率呈增大趋势，粘度呈减小趋势；当胶料的NR/SBR用量比为0/100、胶粉含量为22%时，改性沥青的软化点为99.5 ℃，5 ℃延度为62.5 cm，160 ℃粘度为4.1 Pa·s，25 ℃弹性恢复率为0.85；胶粉的橡胶烃含量对胶粉改性沥青软化点的影响最大，其次是胶粉的炭黑含量。 |
| 英文摘要: |
| The self-made natural rubber （NR）/styrene-butadiene rubber（SBR） vulcanizates with different dosage ratios were quenched and pulverized to obtain rubber powder，which was used to modify the asphalt.The effects of the rubber powder contents on the softening point，5 ℃ ductility，viscosity and 25 ℃ elastic recovery rate of the modified asphalt were studied，and the effect of the rubber powder composition on the softening point of the modified asphalt was explored using grey entropy analysis.The results showed that，with the increase of the rubber powder content，the softening point，5 ℃ ductility and 25 ℃ elastic recovery rate of the modified asphalt increased，while the viscosity decreased.When the NR/SBR dosage ratio was 0/100 and the rubber powder content was 22%，the softening point of the modified asphalt was 99.5 ℃，the ductility at 5 ℃ was 62.5 cm，the viscosity at 160 ℃ was 4.1 Pa·s，and elastic recovery rate at 25 ℃ was 0.85.The rubber hydrocarbon content of the rubber powder had the greatest influence on the softening point of the rubber powder modified asphalt，followed by the carbon black content of the rubber powder. |
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