| 开级配大粒径沥青碎石混合料的高温稳定性 |
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| 引用本文： | 付其林,陈拴发,陈华鑫.开级配大粒径沥青碎石混合料的高温稳定性[J].长安大学学报(自然科学版),2010(2). |
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| 作者姓名： | 付其林 陈拴发 陈华鑫 |
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| 作者单位： | 长安大学公路学院;长安大学材料科学与工程学院; |
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| 基金项目： | 国家西部交通建设科技项目(200631800005) |
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| 摘 要： | 为了分析开级配大粒径沥青碎石混合料(OLSM)的高温稳定性及其影响因素,通过车辙试验,以动稳定度为指标,研究了不同集料级配、沥青用量和试件厚度等条件下的OLSM高温稳定性。结果表明:随着粗集料的增多、空隙率的增大、沥青用量的增大和试件厚度的增加,OLSM的抗车辙能力降低;当空隙率小于20%、沥青用量不超过最佳油石比的+0.5%时,OLSM具有良好的高温稳定性;进一步分析表明,OLSM的车辙深度主要是由混合料进一步压缩引起的。
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| 关 键 词： | 道路工程 开级配大粒径沥青碎石混合料 车辙试验 高温稳定性 影响因素 |
High temperature stability of open-graded large stone asphalt mixes |
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| FU Qi-lin,CHEN Shuan-fa,CHEN Hua-xin.High temperature stability of open-graded large stone asphalt mixes[J].JOurnal of Chang’an University:Natural Science Edition,2010(2). |
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| Authors: | FU Qi-lin CHEN Shuan-fa CHEN Hua-xin |
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| Affiliation: | FU Qi-lin1,CHEN Shuan-fa2,CHEN Hua-xin2(1.School of Highway,Chang\'an University,Xi\'an 710064,Shaanxi,China,2.School of Material Science , Engineering,Xi\'an 710061,China) |
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| Abstract: | Based on results of rutting test,this paper evaluates the high temperature stability of Open-graded Large Stone Asphalt Mixes(OLSM),and analyzes the effects of gradation,asphalt content and specimen thickness on the high temperature stability.Research shows that: with the coarse aggregate,porosity,asphalt content and specimen thickness increasing,the rutting resistance of OLSM decreases;when its porosity is smaller than 20% and the asphalt content is no more than +0.5% of the optimum asphalt content,the hig... |
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| Keywords: | road engineering OLSM rutting test high temperature stability influence factor |
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