| 摘要: |
| 为了研究温拌剂对沥青高温流变性能的影响,将温拌剂Evotherm3G和EC120掺加到基质沥青和SBS改性沥青中以配制温拌沥青,采用动态剪切流变（DSR）试验和多应力蠕变恢复（MSCR）试验对短期老化前后温拌沥青的高温流变性能进行了分析.结果表明:Evotherm3G增加了沥青的相位角,降低了复数模量和车辙因子;EC120降低了沥青的相位角,增大了复数模量和车辙因子;Evotherm3G增加了沥青的应变,降低了蠕变恢复率,提高了不可恢复蠕变柔量;EC120降低了沥青的应变,提高了蠕变恢复率,降低了不可恢复蠕变柔量.通过灰色关联分析可知,不可恢复蠕变柔量与车辙因子的灰色关联度为0995,在一定程度上可以反映沥青的高温性能. |
| 关键词: 温拌沥青 高温流变 动态剪切流变 多应力蠕变恢复 |
| DOI：103969/j.issn.1007 9629202004024 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51308061)；广东省交通运输厅科技项目(科技 2017 01 002) |
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| High Temperature Rheological Properties of Warm Mixed Asphalt |
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LEI Junan1, ZHENG Nanxiang1, XU Xinquan2, WU Chuanhai2, L Dawei3
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1.School of Highway, Changan University, Xian 710064, China;2.Guangdong Hualu Communications Technology Co., Ltd., Guangzhou 510420, China;3.Guangdong Road & Bridge Construction Development Co., Ltd., Guangzhou 510623, China
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| Abstract: |
| In order to investigate the high temperature rheological properties of warm mix asphalt, Evotherm3G and EC120 were added into the matrix and SBS modified asphalt to prepare the samples. Dynamic shear rheological(DSR) test and multi stress creep recovery(MSCR) test were used to evaluate the high temperature rheological properties of warm mix asphalt before and after short term aging. The results show that Evotherm3G increases the phase angle of asphalt, reduces the complex modulus and rutting factor, while EC120 reduces the phase angle of asphalt and increases the complex modulus and rutting factor of modified asphalt.Evotherm3G increases the strain of asphalt, reduces the creep recovery rate of asphalt, and improves the non recoverable creep compliance of asphalt. EC120 reduces the strain of asphalt, improves the creep recovery rate of asphalt and reduces the non recoverable creep compliance of asphalt. Through grey correlation analysis, the grey correlation degree between non recoverable creep compliance and rutting factor is 0995, which can reflect the high temperature performance of asphalt to a certain degree. |
| Key words: warm mix asphalt high temperature rheology dynamic shear rheological(DSR) multi stress creep recovery(MSCR) |
