Assessment of the fracture performance of CR-modified bituminous mixtures enhanced with a reactive polymer using SCB test and image-based crack analysis

IF 8.9 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2026-04-11 Epub Date: 2026-03-09 DOI:10.1016/j.conbuildmat.2026.145839

Furkan Yıldırım , Baha Vural Kök , Abdulkadir Şengür , Ahmet Münir Özdemir

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引用次数: 0

Abstract

Modification of asphalt pavements with various additives has become an inevitable situation in order to resist the increasing traffic conditions and the corrosive effects of the environment for a longer period of time. In this study, the effect of the use of crumb rubber (CR) obtained from waste vehicle tyres in combination with a reactive polymer (B2Last) on fracture performance of bituminous mixtures was investigated by semicircular bending (SCB) test. The performance of CR+B2Last combinations was also compared with the widely used styrene-butadiene-styrene (SBS) modification. This study also examines fracture formation in hot mix asphalt using a U-Net-based image processing approach. It was found that B2Last used with CR realised the polyurethane reaction after short-term aging and was compatible with the bituminous mixture. 8%CR modification showed similar performance with 4% SBS modification, while the use of 2%B2Last in combination with 8%CR significantly increased the effectiveness of CR and offered much better fracture resistance than 4%SBS modification. With the U-net architecture, the crack area and propagation were successfully determined, and it was also found that there was a high correlation between these determined areas and SCB parameters.

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利用SCB试验和基于图像的裂缝分析评估反应性聚合物增强cr改性沥青混合料的断裂性能

为了更长时间地抵抗日益增加的交通条件和环境的腐蚀作用，用各种添加剂对沥青路面进行改性已成为一种必然的情况。本研究通过半圆弯曲（SCB）试验，研究了从废旧汽车轮胎中提取的橡胶屑（CR）与反应性聚合物（B2Last）结合使用对沥青混合料断裂性能的影响。并将CR+B2Last复合材料的性能与目前广泛应用的SBS改性材料进行了比较。本研究还使用基于u - net的图像处理方法检查热混合沥青中的裂缝形成。结果表明，B2Last与CR混合使用后，在短期老化后实现了聚氨酯反应，与沥青混合料的相容性较好。8%CR改性与4%SBS改性的性能相似，而2%B2Last与8%CR联合使用可显著提高CR的有效性，并且具有比4%SBS改性更好的抗断裂性。利用U-net结构，成功地确定了裂纹面积和扩展范围，并发现这些确定的面积与SCB参数之间存在较高的相关性。

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

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.