performance evaluation of half warm asphalt mixture prepared with natural and nano synthetic zeolite, chemical additives and polymers

Mohamed, Hussein Khaled; Elsayed, Ahmed Abdelghani; Abd El-latif, Mohamed El-shafie; Mostafa, Abdelzaher Ezzeldeen Ahmed

doi:10.21608/jesaun.2025.349056.1403

performance evaluation of half warm asphalt mixture prepared with natural and nano synthetic zeolite, chemical additives and polymers

Document Type : Research Paper

Authors

¹ Civil, faculty of engineering ,mataria,Helwan university , Ain shams , cairo

² civil engineering department faculty of engineering helwan university

³ Applied Chemistry, Head of the Asphalt Laboratory, Egyptian Petroleum Research Institute, Nasr city , cairo

⁴ Civil engineering, Matria school of engineering, helwan University

10.21608/jesaun.2025.349056.1403

Abstract

Abstract
This study evaluates the performance of Half Warm Mix Asphalt (HWMA) prepared with natural and nano synthetic zeolite, chemical additives, and polymers, aiming to develop an environmentally friendly alternative to conventional Hot Mix Asphalt (HMA). HWMA provides significant advantages, including reduced production temperatures and lower energy consumption, leading to decreased greenhouse gas emissions and improved worker safety. The research addresses the current gap in comparative analyses between HWMA and HMA by conducting comprehensive tests, including indirect tensile strength (ITS), loss of stability, and scanning electron microscope (SEM). The results demonstrated that HWMA modified with 10% synthetic zeolite, 5% epoxy, and 10% stearic acid achieved higher ITS values and reduced moisture susceptibility compared to conventional HMA. Notably, the inclusion of stearic acid at 90°C enhanced stability, resulting in a 9% reduction in stability loss when compared to the control sample. SEM analyses confirmed structural improvements and chemical interactions that contributed to enhanced performance. These findings highlight HWMA's potential as a sustainable and high-performance alternative to HMA without compromising mechanical properties.

Keywords

Main Subjects

Civil Engineering: structural, Geotechnical, reinforced concrete and steel structures, Surveying, Road and traffic engineering, water resources, Irrigation structures, Environmental and sanitary engineering, Hydraulic, Railway, construction Management.

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