用差示扫描量热计（DSC）研究HDPE、LDPE和PP改性沥青粘合剂相容性的热力学方法

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-04-15 DOI:10.1016/j.conbuildmat.2025.140904

Shahjalal Selim , Md Reazul Islam , Nazimuddin M. Wasiuddin , Andrew Peters

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引用次数: 0

摘要

长期以来，塑料材料与沥青粘结剂的结合一直是一个实验和研究的课题。然而，塑料与沥青-塑料共混物的相分离仍然是这一研究领域的主要挑战之一。本研究的重点是比较三种类型的塑料——高密度聚乙烯（HDPE）、低密度聚乙烯（LDPE）和聚丙烯（PP）——在两种不同沥青粘结剂等级（PG 67-22和PG 58-28）的不同组成中的热力学相容性。Nishi和Wang在flury - huggins理论（F-HT）的基础上提出了熔点下降理论（MPD），用于确定所有沥青-塑料共混物的相互作用参数（χ）。结果表明，所有χ值均为正，表明共混物不具有混相性。与其他沥青-塑料共混物相比，hdpe -沥青共混物的热稳定性最好，χ值最低（0.0140）。PG 58-28粘结剂与HDPE、LDPE和PP的相容性较好，这可能是由其化学成分决定的。

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A thermodynamic approach to investigate compatibility of HDPE, LDPE, and PP modified asphalt binders using differential scanning calorimeter (DSC)

The integration of plastic materials into asphalt binder has been a subject of experimentation and research for a long time. However, the phase separation of plastic from the asphalt-plastic blend remains one of the main challenges in this area of study. This research focused on the comparative thermodynamic compatibility of three types of plastics—high-density polyethylene (HDPE), low-density polyethylene (LDPE), and polypropylene (PP)—in various compositions with two distinct asphalt binder grades, PG 67–22 and PG 58–28. The Melting Point Depression (MPD) theory, developed by Nishi and Wang, and based on the Flory-Huggins theory (F-HT), was utilized to determine the interaction parameter (χ) for all the asphalt-plastic blends. The result showed that all the χ values were positive, which indicates the blends were not miscible. HDPE-asphalt blend had the most thermal stability compared to the other asphalt-plastic blends, indicated by the lowest χ value (0.0140). The PG 58–28 binder exhibited better compatibility with HDPE, LDPE, and PP, likely due to its chemical composition.

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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.