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Use of fine aggregate matrix to analyze the rheological behavior of cold recycled materials

机译：使用细聚集矩阵分析冷再生材料的流变行为

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摘要

Nowadays, one of the main challenges to a wider application of cold recycling techniques is the lack of reliable information on the mechanical behavior of cold recycled materials (CRM). In this context, measurement and modelling of the complex modulus of CRM mixtures may give an important contribution to the design and analysis of pavements including cold recycled layers. In this study, we analyzed the rheological behavior of CRM mixtures produced using bitumen emulsion and cement through the study of their fine aggregate matrix (FAM). Starting from a fixed CRM mixture composition, we compared different FAM mortars, focusing on the effect of water and air content. Then, we selected a composition as representative of the FAM in the mixture and investigated the evolution of both materials during a fixed curing period. Next, we measured the complex modulus of the CRM mixture and FAM at two curing stages and applied a rheological model to simulate and compare their behavior. Results showed that the properties of CRM mixtures are comparable to those of FAM mortars produced using all the binding agents (bitumen emulsion and cement) and a fraction of the voids contained in the mixture. Despite the huge difference in volumetric compositions, the FAM mortar controlled the curing and the thermo-rheolog-ical behavior of the CRM mixture, while the coarse reclaimed asphalt aggregate fraction and the voids mainly affected the asymptotic properties (equilibrium and glassy moduli) and the non-viscous dissipation component.
机译：如今，更广泛地应用冷回收技术的主要挑战之一是有关冷再生材料（CRM）的机械行为的可靠信息。在这种情况下，CRM混合物的复杂模量的测量和建模可以给出包括冷回收层的路面的设计和分析的重要贡献。在这项研究中，我们通过研究其细骨料基质（FAM）的研究分析了使用沥青乳液和水泥产生的CRM混合物的流变行为。从固定的CRM混合物组合物开始，我们比较了不同的FAM砂浆，重点是水和空气含量的影响。然后，我们选择了一种组合物作为混合物中的FAM的代表，并在固定固化期间研究了两种材料的演变。接下来，我们以两个固化阶段测量CRM混合物和FAM的复杂模量，并施加流变模型以模拟并比较它们的行为。结果表明，CRM混合物的性质与使用所有结合剂（沥青乳液和水泥）产生的FAM砂浆的性质以及混合物中含有的空隙的一部分。尽管体积组合物的巨大差异，但是FAM砂浆控制了CRM混合物的固化和热流变学行为，而粗再生的沥青骨料分​​数和空隙主要影响了渐近性质（平衡和玻璃模数）和非粘性耗散组分。

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  • 来源
    《Materials and structures》 |2020年第4期|72.1-72.16|共16页
  • 作者

    Andrea Graziani; Simone Raschia; Chiara Mignini; Alan Carter; Daniel Perraton;

  • 作者单位

    Department ICEA of Civil and Building Engineering and Architecture Polytechnic University of Marche Via Brecce Bianche 60131 Ancona Italy;

    Construction Engineering Department Ecole de Technologie Superieure (ETS) 1100 Notre-Dame Street West Montreal Canada;

    Department ICEA of Civil and Building Engineering and Architecture Polytechnic University of Marche Via Brecce Bianche 60131 Ancona Italy;

    Construction Engineering Department Ecole de Technologie Superieure (ETS) 1100 Notre-Dame Street West Montreal Canada;

    Construction Engineering Department Ecole de Technologie Superieure (ETS) 1100 Notre-Dame Street West Montreal Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cold recycled materials; Fine aggregate matrix; Mortar; Curing; Complex modulus; Thermo-rheological modeling;

    机译：冷再生材料;细骨料矩阵;砂浆;养护;复杂模量;热流变型造型;

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