Synergistic effects of hybrid fibers and elevated temperature on strength and phase assemblage of granite Waste-Based geopolymer composites

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-04-15 DOI:10.1016/j.matlet.2025.138583

Ahmed Babeker Elhag , Nejib Ghazouani , Mohamed Hechmi El Ouni , Ali Raza

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引用次数: 0

Abstract

This study investigates the synergistic effects of hybrid fibers and elevated temperatures on the mechanical performance and phase behavior of granite waste-based geopolymer composites (GC). The influence of 1 % polyethylene fiber (PF) and 0.5 % Kevlar fiber (KF) on strength and thermal resistance was evaluated through compressive and flexural tests at ambient and elevated temperatures (250 °C, 500 °C, 1000 °C). Microstructural characterization was conducted using SEM, EDS, and XRD. Thermal curing at 100 °C for 12 h yielded optimal strength retention, with compressive strength increasing by up to 184.3 % at 500 °C. KF-reinforced composites exhibited superior thermal stability, retaining 180.38 % of their initial strength at 1000 °C. SEM and EDS analyses revealed structural modifications after heating, while XRD confirmed the transformation of crystalline phases into amorphous forms, contributing to enhanced strength. Si/Al ratios indicated the formation of silica-rich aluminosilicate gels, improving thermal stability.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive