| 摘要: |
| 针对泡沫沥青冷再生混合料（CRMFB）高温稳定性和抗水损性能的不足,采用水性环氧树脂（WER）对其进行改性,研究了WER的掺加方式及掺量、混合料的储存时间和储存温度对CRMFB性能的影响.结果表明：WER的最佳掺加方式为先将其加入拌和水中,再与矿料一起加入拌和锅内;WER通过与松散细集料形成高黏性热固性胶浆以及生成固化产物对沥青分子进行“嵌锁”等方式改善CRMFB的性能;级配S和级配Z的CRMFB抗水损性能、高温稳定性均有提高;建议CRMFB在45min内从拌和厂运送至现场摊铺压实,当施工气温较低或较高时,运输时间宜控制在30min内. |
| 关键词: 泡沫沥青 水性环氧树脂 高温稳定性 抗水损性能 |
| DOI：103969/j.issn.1007 9629202104027 |
| 分类号: |
| 基金项目:住房城乡建设部2018年科学技术项目（2018 k9 062） |
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| Performances of Cold Recycling Mixture with Foamed Bitumen and Waterborne Epoxy Resin |
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LI Xiujun1, GAO Shizhu1, ZHAO Linhao1, QIAO Xiangjun2, SHAO Han1
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1.School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China;2.Baotou Municipal Design Institute, Baotou 014030, China
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| Abstract: |
| In view of the lack of high temperature stability and water damage resistance of cold recycling mixture with foamed bitumen(CRMFB), waterborne epoxy resin(WER) was used to modify it. The effects of mixing method, WER dosage, storage time and storage temperature on the performance of the CRMFB were studied in detail. The results show that the best mixing method of WER is to add it into the mixing water first, and then into mixing pot together with mineral materials. The performance of the CRMFB is improved by forming a high viscosity thermosetting slurry with loose fine aggregate and “locking” molecules of bitumen molecules with curing products. The water damage resistance and high temperature stability of graded S and graded Z mixtures are improved. It is recommended that CRMFB should be transported from the mixing plant to the site for paving and compaction within 45min. No matter the working temperature is low or high, the transportation time should be controlled within 30min. |
| Key words: foamed bitumen waterborne epoxy resin high temperature stability water damage resistance |
