Laboratory Evaluation of Moisture Susceptibility of Hot-Mix Asphalt Containing Cementitious Fillers
Laboratory Evaluation of Moisture Susceptibility of Hot-Mix Asphalt Containing Cementitious Fillers
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DOI：
10.1061/(asce)mt.1943-5533.0000064
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发表时间：
2010-07-01
影响因子：
3.2
通讯作者：
Shen, Junan
中科院分区：
文献类型：
--
作者：
Huang, Baoshan;Shu, Xiang;Shen, Junan
长期以来，水分引起的损坏一直被认为是沥青路面的主要问题之一。为了减轻潜在的水分损害，一种通用方法是在热拌沥青 (HMA) 混合物中添加矿物抗剥离添加剂或液体抗剥离剂。在这项研究中，进行了一项比较实验室实验，以研究水泥填料对 HMA 混合物湿敏性的有效性。考虑了五种类型的水泥填料：粉煤灰、水泥窑粉尘和三种不同细度的熟石灰。经过湿气调节的HMA混合物的实验室性能通过以下测试进行评估：动态模量测试； superpave间接拉伸试验；和拉伸强度比测试。测试结果表明，水泥基填料通常能有效降低 HMA 混合物的湿敏感性。熟石灰颗粒越细，沥青混合料的耐久性就越强。此外，还对沥青胶泥进行了动态剪切流变仪试验，探讨不同胶凝填料的硬化效果。
Moisture-induced damage has long been recognized as one of the major concerns for asphalt pavements. To mitigate potential moisture damage, one general method is to add mineral antistripping additives or liquid antistripping agents into hot-mix asphalt (HMA) mixtures. In this study, a comparative laboratory experiment was conducted to investigate the effectiveness of cementitious fillers on moisture susceptibility of HMA mixtures. Five types of cementitious fillers were considered: fly ash, cement kiln dust, and three types of hydrated lime with different finenesses. The laboratory performance of HMA mixtures subjected to moisture conditioning was evaluated through the following tests: dynamic modulus test; superpave indirect tensile tests; and tensile strength ratio test. The test results indicate that the cementitious fillers were generally effective in reducing the moisture susceptibility of HMA mixtures. The finer the hydrated lime particle, the more resistant the asphalt mixtures. In addition, dynamic shear rheometer test was conducted on asphalt mastics to explore the stiffening effect of different cementitious fillers.