Improvement Marshall Properties of Hot Mix Asphalt Concrete Using Polyphosphoric Acid

IF 1.7 Q2 ENGINEERING, MULTIDISCIPLINARY
Marwa Jawad Badr, M. Ismael
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引用次数: 0

Abstract

Modified asphalt is considered one of the alternatives to address the problems of deficiencies in traditional asphalt concrete, as modified asphalt addresses many of the issues that appear on the pavement layers in asphalt concrete, resulting from heavy traffic and vehicles loaded with loads that exceed the design loads and the large fluctuations in the daily and seasonal temperatures of asphalt concrete. The current study examined the role of polyphosphoric acid (PPA) as a modified material for virgin asphalt when it was added in different proportions (1%, 2%, 3%, 4%) of the asphalt weight. The experimental program includes the volumetric characteristics associated with the Marshall test, the physical properties, and the FTIR spectroscopy examination of virgin asphalt and polyphosphoric acid (PPA) modified asphalt. This study showed that mixtures with modified asphalt using polyphosphoric acid (PPA) by 3% achieved the typical Marshall properties at the optimal asphalt content of 4.8%, recording a 10% decrease in the optimum asphalt content for the mixtures made with virgin (unmodified) asphalt, whose proportion was 4.9% is the optimum asphalt content. PPA is available in the local markets and is considered cheaper than polymers. It is also regarded as economical as it reduces the optimum content of asphalt.
使用多磷酸改善热拌沥青混凝土的马歇尔性能
改性沥青被认为是解决传统沥青混凝土缺陷问题的替代方案之一,因为改性沥青可以解决沥青混凝土路面层上出现的许多问题,这些问题是由于重型交通和车辆装载的荷载超过了设计荷载以及沥青混凝土的日温度和季节温度波动较大造成的。当前的研究考察了聚磷酸(PPA)作为原生沥青改性材料的作用,当它以不同的比例(1%、2%、3%、4%)添加到沥青重量中时。实验项目包括与马歇尔试验相关的体积特性、物理性能以及原生沥青和聚磷酸(PPA)改性沥青的傅立叶变换红外光谱检测。这项研究表明,使用 3% 的聚磷酸(PPA)改性沥青制成的混合料在最佳沥青含量为 4.8% 时达到了典型的马歇尔特性,而使用原生(未改性)沥青制成的混合料的最佳沥青含量则降低了 10%,原生沥青的最佳沥青含量为 4.9%。PPA 在当地市场有售,价格比聚合物便宜。由于 PPA 能降低沥青的最佳含量,因此也被认为是经济的。
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来源期刊
Journal of Engineering
Journal of Engineering ENGINEERING, MULTIDISCIPLINARY-
CiteScore
4.20
自引率
0.00%
发文量
68
期刊介绍: Journal of Engineering is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles in several areas of engineering. The subject areas covered by the journal are: - Chemical Engineering - Civil Engineering - Computer Engineering - Electrical Engineering - Industrial Engineering - Mechanical Engineering
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