Moisture-induced damage potential of asphalt mixes containing polyphosphoric acid and antistripping agent

IF 3.4 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Road Materials and Pavement Design Pub Date : 2021-11-29 DOI:10.1080/14680629.2021.2002180

Shivani Rani, R. Ghabchi, S. A. Ali, M. Zaman, E. O’Rear

引用次数: 3

Abstract

This study examines the effects of PPA and ASA on interfacial energies and moisture-induced damage potential of mixes using a Surface Free Energy (SFE) method. The SFE components of binder blends containing different amounts of PPA and ASA and aggregates were determined using Dynamic Wilhelmy Plate and Universal Sorption Device-based tests, respectively. Based on the measured SFE components and interfacial energy, it was found that using PPA with or without ASA does not affect cohesive bond of binder. However, depending on aggregate type, PPA may improve adhesive bond. Also, using an amine-based ASA does not improve the resistance to moisture-induced damage of binders or mixes containing PPA. Therefore, using an amine-based ASA with PPA-modified asphalt binder is not recommended. Among different PPA amounts considered, using 1.5% PPA with and without ASA was found to be the most effective concentration in improving the adhesive bond and wettability of binders with aggregates.

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含多磷酸和防剥离剂沥青混合料的受潮损伤潜力

本研究采用表面自由能(SFE)方法研究了PPA和ASA对混合物界面能和湿致损伤电位的影响。采用基于动态威廉板和通用吸附装置的测试分别测定了含有不同量PPA、ASA和聚集体的粘结剂共混物的SFE组分。根据测定的SFE组分和界面能，发现PPA加或不加ASA对粘结剂的内聚键没有影响。然而，根据骨料的类型，PPA可以改善粘合剂的粘合。此外，使用胺基ASA并不能提高含有PPA的粘合剂或混合物对水分引起的损伤的抵抗力。因此，不建议使用胺基ASA与ppa改性沥青粘合剂。在考虑的不同PPA用量中，使用1.5%的PPA(含和不含ASA)是改善聚集体粘合剂粘结性和润湿性的最有效浓度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Road Materials and Pavement Design 工程技术-材料科学：综合

CiteScore

8.10

自引率

8.10%

发文量

105

审稿时长

3 months

期刊介绍： The international journal Road Materials and Pavement Design welcomes contributions on mechanical, thermal, chemical and/or physical properties and characteristics of bitumens, additives, bituminous mixes, asphalt concrete, cement concrete, unbound granular materials, soils, geo-composites, new and innovative materials, as well as mix design, soil stabilization, and environmental aspects of handling and re-use of road materials. The Journal also intends to offer a platform for the publication of research of immediate interest regarding design and modeling of pavement behavior and performance, structural evaluation, stress, strain and thermal characterization and/or calculation, vehicle/road interaction, climatic effects and numerical and analytical modeling. The different layers of the road, including the soil, are considered. Emerging topics, such as new sensing methods, machine learning, smart materials and smart city pavement infrastructure are also encouraged. Contributions in the areas of airfield pavements and rail track infrastructures as well as new emerging modes of surface transportation are also welcome.