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Comparative evaluation of Theological properties and micromechanics of non-foamed and foamed asphalt mastic

机译：非发泡和发泡沥青胶泥的流变性能和微力学的比较评价

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Foamed warm asphalt has become an effective option to common asphalt technologies. It is quite significant for foamed asphalt to be used widely with regard to the mechanical investigation of foamed asphalt mastic. The objective of this study is to explore the rheological properties of non-foamed (base) and foamed asphalt mastics with different filler-binder ratios completely, by using the dynamic shear rheometer (DSR) and bending beam rheometer (BBR) tests, respectively. Also, the influence of filler asphalt ratio on the high and low temperature performance of the base and foamed asphalt mastic was analyzed, and the effectiveness of time-temperature superposition principle was discussed for the foamed asphalt mastic. The master curves of base and foamed asphalt mastic were established and then the master curve was used for that to perform a rheological properties analysis over a wide range of temperatures and frequencies. In addition, this study investigated the micromechanics of the base and foamed asphalt mastic by using direct microstructure observations and thermal property testing, including scanning electron microscope (SEM) and differential scanning calorimeter (DSC). It was found that the addition of mineral filler into the foamed asphalt exhibited a significant influence on the high and low temperature performance. The time-temperature superposition principle can be employed in the foamed asphalt mastic. The foamed asphalt mastic showed better high temperature performance than the base asphalt mastic over a wide range of frequency. The low temperature PG grade of the foamed asphalt mastic indicated a favorable consistency with that of the base asphalt mastic. The distribution of filler in the base asphalt mastic was inferior to that in the basic asphalt mastic. The thermal stability of foamed asphalt mastic performed an obvious increase as compare to that of base asphalt mastic. (C) 2018 Elsevier Ltd. All rights reserved.
机译：发泡的热沥青已经成为普通沥青技术的有效选择。就泡沫沥青胶泥的力学研究而言，泡沫沥青的广泛应用是非常重要的。这项研究的目的是通过分别使用动态剪切流变仪（DSR）和弯曲束流变仪（BBR）测试来完全探索具有不同填充剂-粘合剂比率的非发泡（基础）和泡沫沥青胶泥的流变特性。此外，分析了填料沥青比对基础和泡沫沥青胶泥的高温和低温性能的影响，并讨论了时间-温度叠加原理对泡沫沥青胶泥的有效性。建立基础和泡沫沥青胶泥的主曲线，然后将其用于在宽温度和频率范围内进行流变特性分析。此外，本研究通过直接的微观结构观察和热性能测试，包括扫描电子显微镜（SEM）和差示扫描量热仪（DSC），研究了基料和泡沫沥青胶泥的微力学。已发现向泡沫沥青中添加矿物填​​料对高温和低温性能表现出显着影响。时间-温度叠加原理可用于泡沫沥青胶泥中。在广泛的频率范围内，泡沫沥青胶泥比基础沥青胶泥具有更好的高温性能。泡沫沥青胶泥的低温PG等级表明与基础沥青胶泥的良好一致性。填料在基础沥青胶泥中的分布低于在基础沥青胶泥中的分布。与基础沥青胶泥相比，泡沫沥青胶泥的热稳定性明显提高。 （C）2018 Elsevier Ltd.保留所有权利。

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