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Assessing the effect of fillers on LVE properties of asphalt mastics at intermediate temperatures

机译：评估填料对中间温度沥青胶芯LVE性能的影响

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摘要

This study aims at examining the performance of asphalt mastics in the Linear Viscoelastic (LVE) domain incorporating three Indian and three Austrian fillers. The various physical, morphological, and chemical properties of the fillers were analyzed with the help of respective characterization tests. In addition to the particle size distribution curve and fineness modulus, a new parameter called Filler Grain Coefficient (FGC) has been introduced in this study to quantify the distribution of particles in the system. This paper also attempts to find a correlation between various physical parameters. There are two variables i.e., |G~*|_(LVE)and |G~*|_(ratio) in order to quantify the Linear Viscoelastic complex modulus. The effects of both volume and surface area of fillers have been manifested by three ratios denoted as V/FM, V/FGC, and V/ RV. To compare the outcome of the study, the Strategic Highway Research Program Linear Viscoelastic strain criteria is also included, which examines the applicability of the criteria to the asphalt mastics. The research incorporates a wide range of fillers with variable properties, as confirmed by the test results. Filler parameters Rigden Voids and Filler Grain Coefficient were found to be strongly correlated with almost all physical properties. On the grounds of variation in LVEM with volume concentration of filler, the highest rank can be attributed to Red Mud and LimeStone, respectively, followed by other fillers with Marble Dust being the lowest. The reinforcing effect of fillers and higher surface area contributed to the exponential increase in |G~* |_(LVE), with an increase in volumetric concentration. The variation of both variables: |G~*|_(LVE) and |G~*|_(ratio), presented V/FM as the most worthy parameter, as it illustrated variation at different temperatures. The Linear Viscoelastic limits obtained from the study were relatively conservative compared to those from the SHRP study, this confirms the unsuitability of applying SHRP equations to the asphalt mastics. Moreover, the relationship instigated in the study can be used to reckon the LVE strain limit and to further analyse asphalt mastics.
机译：本研究旨在检查包含三个印度和三个奥地利填料的线性粘弹性（LVE）域中的沥青胶丝的性能。在各种表征试验的帮助下分析填料的各种物理，形态和化学性质。除了粒度分布曲线和细度模量之外，本研究还介绍了一种称为填充晶系数（FGC）的新参数，以量化系统中颗粒的分布。本文还试图在各种物理参数之间找到相关性。有两个变量即，| G〜* | _（LVE）和| G〜* | _（比率），以定量线性粘弹性复合模量。填料的体积和表面积的影响已经表现为3个比例，其表示为V / FM，V / FGC和V / RV。为了比较研究结果，还包括战略公路研究计划线性粘弹性应变标准，该标准介绍了标准对沥青胶印的适用性。该研究含有各种具有可变性质的填料，如测试结果所确认。发现填料参数RIGDEN空隙和填充晶粒系数与几乎所有物理性质强烈相关。在填料的浓度浓度的液体变化的基础上，最高等级可以分别归因于红泥和石灰石，其次是其他填料，具有大理石粉尘是最低的。填料和较高表面积的增强效果有助于（LVE）的指数增加，增加体积浓度。变量的变化：| G〜* | _（LVE）和| g〜* | _（比率），呈现V / FM作为最值得参数，因为它在不同温度下说明了变化。与来自SHRP研究相比，从研究中获得的线性粘弹性极限相比，从研究中，这证实了将SHRP方程应用于沥青胶印的不适用性。此外，研究中煽动的关系可用于估计LVE应变极限并进一步分析沥青胶印。

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