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| 天然橡胶在基质沥青中的改性应用研究 |
| Modification Application of Natural Rubber in Matrix Asphalt |
| Received:February 04, 2021 Revised:February 04, 2021 |
| DOI：10.12137/j.issn.2095-5448.2022.01.0026 |
| 中文关键词: 天然橡胶 改性剂 基质沥青 溶胀机理 沥青混合料 |
| 英文关键词: natural rubber modifier matrix asphalt swelling mechanism asphalt mixture |
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| 中文摘要: |
| 研究天然橡胶在基质沥青中的改性应用。以天然橡胶为改性剂，经过预处理后与道路石油沥青进行混合，再经剪切、溶胀等加工，制备了一种高性能改性沥青材料。结果表明：在添加非极性有机增塑剂进行混合捏炼的情况下，天然橡胶与基质沥青具有良好的相容性，制备的改性沥青具有较好的感温性、高温稳定性、低温抗裂性和耐热性，满足改性沥青产品企业标准。在最佳油石比（6.6%）下，NR母料改性沥青性能为稳定度 7.3 kN，流值 23.0 mm，60 ℃动稳定度 8 442次，浸水马氏残留强度比 96%，冻融劈裂强度比 91%。 |
| 英文摘要: |
| The modification application of natural rubber in matrix asphalt was investigated.Natural rubber was used as a modifier，mixed with road petroleum asphalt after pretreatment，and then processed by shearing and swelling to prepare a high-performance modified asphalt material.The results showed that when a non-polar organic plasticizer was added for mixing and kneading，natural rubber and matrix asphalt had good compatibility，and the prepared modified asphalt had good temperature sensitivity，high temperature stability，low temperature crack resistance and heat resistance，met the enterprise standards of modified asphalt products.Under the best bituminous/stone ratio（6.6%），the performance of the modified asphalt mixture was as follow，stability 7.3 kN，flow value 23.0 mm，dynamic stability at 60 ℃ 8 442 times，residual strength ratio of immersion Markov 96%，and the freeze-thaw splitting strength ratio 91%. |
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