Evaluation on wide-temperature rheological properties and compatibilization of polyphosphoric acid-modified asphalt mastic

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

Construction and Building Materials Pub Date : 2026-04-11 Epub Date: 2026-03-11 DOI:10.1016/j.conbuildmat.2026.145898

Xiang Liu , Jun Yang , Haitao Su , Jingpeng Jia , Xiaolong Li , Xianglin He

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引用次数: 0

Abstract

Polyphosphoric acid (PPA)-modified asphalt provides cost-effectiveness and performance advantages, making it well-suited for stone mastic asphalt (SMA) mixtures. However, the performance and interactions of the modified asphalt mastic in the mixture require further investigation. This study investigates the wide-temperature rheological properties and interactions of PPA-modified asphalt mastics with a high filler-to-binder ratio, considering asphalt source (Shell 70# and DH 70#), fiber type (lignin fibers (LF) and basalt fibers (BF)). The rheological characteristics were examined using a dynamic shear rheometer, and the interactions in the PPA-asphalt-filler-fiber system were analyzed using Cole-Cole, Han, and Van Gurp-Palmen (vGP) plots. Mechanisms of PPA and fiber interaction were explored through microscopy and infrared spectroscopy. The results showed that PPA forms a strongly modified mastic system with DH 70# (asphaltene content 20.7%). The J_nr3.2 decreases by 43.6%, indicating improvement in high-temperature performance. In contrast, Shell 70# exhibits only weak modification; its J_nr3.2 even increases by 2.7%. PPA improves the fatigue life of asphalt mastic, particularly at low-strain. BF further enhances the fatigue life across the entire-strain. However, LF exhibits a positive effect only in the strongly modified system. Meanwhile, fibers (particularly BF) reduce the low-temperature stress relaxation capacity. In addition, PPA improves the compatibility of the asphalt–filler system. However, the fibers fail to provide further benefits and instead intensify high-temperature heterogeneity in weakly modified system. Esterification reactions may occur between PPA and LF. However, PPA has reacted with the asphalt binder. As a result, system interactions are dominated by physical adsorption, ultimately leading to heterogeneous structure.

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多磷酸改性沥青胶泥的宽温流变性能及增容性能评价

聚磷酸（PPA）改性沥青具有成本效益和性能优势，非常适合于石胶泥沥青（SMA）混合物。然而，改性沥青胶泥在混合料中的性能和相互作用需要进一步研究。考虑沥青来源（Shell 70#和DH 70#）、纤维类型（木质素纤维（LF）和玄武岩纤维（BF）），研究高填料胶比ppa改性沥青胶粘剂的宽温流变特性和相互作用。使用动态剪切流变仪检查了流变特性，并使用Cole-Cole， Han和Van Gurp-Palmen （vGP）图分析了ppa -沥青-填料-纤维体系中的相互作用。通过显微镜和红外光谱研究了PPA与纤维相互作用的机理。结果表明，PPA形成了一种DH 70#（沥青质含量20.7%）的强改性胶泥体系。Jnr3.2降低了43.6%，表明高温性能有所提高。相比之下，壳牌70#仅表现出微弱的修改；其Jnr3.2甚至上涨了2.7%。PPA提高了沥青胶泥的疲劳寿命，特别是在低应变下。BF进一步提高了整个应变的疲劳寿命。然而，LF仅在强修饰系统中表现出积极作用。同时，纤维（特别是BF）降低了低温应力松弛能力。此外，PPA还改善了沥青填料体系的相容性。然而，纤维不能提供进一步的好处，反而加剧了弱改性体系的高温非均质性。PPA和LF之间可能发生酯化反应。然而，PPA与沥青粘结剂发生了反应。因此，系统相互作用以物理吸附为主，最终导致非均相结构。

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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.