...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of materials in civil engineering >Selective Absorption of Asphalt Binder by Limestone Aggregates in Asphalt Mixtures
【24h】

Selective Absorption of Asphalt Binder by Limestone Aggregates in Asphalt Mixtures

机译：石灰石聚集体在沥青混合料中对沥青结合料的选择性吸收

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

It has been found that aggregates used in paving asphalt mixtures absorb the asphalt binder into the porous structure of the aggregates. National test methods are available to measure the aggregate absorption. However, most research and measurements on aggregate absorption are limited to the accessible voids at the aggregate surface. This paper presents recent findings on the selective absorption of asphalt binder by aggregate particles in asphalt mixtures. The selective absorption of the binder is visualized on the aggregate surface under natural light and ultraviolet light. Rings with different colors are identified on the cross sections of the aggregates in both hot-mix asphalt and warm-mix asphalt, which indicates different asphalt components at different radial distances from the center of the aggregates. The asphalt components penetrating into aggregates are verified using the laser desorption ionization-ion mobility-mass spectrometer. A significantly higher concentration of asphalt components is identified at the edge of the limestone sample than in its center after it is soaked in a PG 58-28 asphalt binder (labeled AAD) for 32 h. Creep tests are also conducted on fresh limestone samples and limestone samples soaked in the AAD binder. The fresh limestone sample behaves elastically and is approximately twice as stiff as the sample soaked in the binder, which exhibits nonnegligible viscoelastic properties in the creep test.
机译：已经发现，用于铺筑沥青混合物的骨料将沥青粘合剂吸收到骨料的多孔结构中。国家测试方法可用于测量骨料的吸收。但是，大多数有关聚集体吸收的研究和测量都限于聚集体表面可接近的空隙。本文介绍了最近发现的沥青混合料中骨料颗粒对沥青结合料的选择性吸收。粘合剂的选择性吸收在自然光和紫外光下在聚集体表面上可见。在热拌沥青和热拌沥青中，在骨料的横截面上都可以识别出不同颜色的环，这表明距骨料中心的径向距离不同的沥青组分也不同。渗透到集料中的沥青成分使用激光解吸电离离子迁移率质谱仪进行了验证。将其浸泡在PG 58-28沥青粘合剂（标记为AAD）中32小时后，发现石灰岩样品边缘的沥青成分浓度比其中心的浓度高得多。还对新鲜石灰石样品和浸泡在AAD粘合剂中的石灰石样品进行蠕变测试。新鲜的石灰石样品具有弹性，其硬度大约是浸泡在粘合剂中的样品的两倍，在蠕变试验中它表现出不可忽略的粘弹性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号