Evaluation of the effect of binder type and layer thickness on the performnce of open graded friction courses

IF 4.4 2区化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Polymer Materials Pub Date : 2024-09-19 DOI:10.1016/j.conbuildmat.2024.138395

Ohhoon Kwon , Gregory Sholar , Shahbaz Khan , Mang Tia

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引用次数: 0

Abstract

To improve the long-term durability and functionality of open graded friction courses (OGFC), the Florida Department of Transportation (FDOT) investigated the use of a highly modified asphalt binder and increased thickness using Accelerated Pavement Testing (APT). A total of six test sections with combinations of two modified binder types (PG 76–22 and PG 82–22) and three lift thicknesses of 0.75 (19.05 mm), 1.25 (31.75 mm) and 2 (50.8) inches were constructed at FDOT’s APT facility. Accelerated loading was performed using a Heavy Vehicle Simulator (HVS) to evaluate the relative rutting performance of the test sections. Supplementary field and laboratory tests to evaluate tensile strength, Cantabro loss, field permeability, surface characteristics, and asphalt binder properties were also conducted. Test results indicated that the use of PG 82–22 polymer modified asphalt (PMA) binder may be beneficial to improve long-term durability of the OGFC. Thicker layers of OGFC were found to have considerably lower durability. It is recommended that the use of a highly modified PMA asphalt binder in OGFC layers be considered when raveling and other durability issues are of concern.

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评估粘结剂类型和粘结层厚度对开放式分级摩擦路面性能的影响

为了提高开放式分级摩擦路面 (OGFC) 的长期耐久性和功能性，佛罗里达州交通部 (FDOT) 通过加速路面测试 (APT) 研究了使用高度改性沥青粘结剂和增加厚度的方法。在 FDOT 的 APT 设施中，总共建造了六个试验段，分别采用两种改性粘结剂类型（PG 76-22 和 PG 82-22）和 0.75 英寸（19.05 毫米）、1.25 英寸（31.75 毫米）和 2 英寸（50.8 毫米）三种提升厚度。使用重型车辆模拟器 (HVS) 进行了加速加载，以评估测试路段的相对车辙性能。此外，还进行了现场和实验室补充测试，以评估拉伸强度、坎塔布洛损失、现场渗透性、表面特性和沥青粘结剂特性。试验结果表明，使用 PG 82-22 聚合物改性沥青（PMA）粘结剂可能有利于提高 OGFC 的长期耐久性。试验发现，较厚的 OGFC 层的耐久性要低得多。建议在担心出现沥青碎裂和其他耐久性问题时，考虑在 OGFC 层中使用高度改性的 PMA 沥青粘结剂。

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来源期刊

ACS Applied Polymer Materials Multiple-

CiteScore

7.20

自引率

6.00%

发文量

810

期刊介绍： ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.