通过城市生活垃圾焚烧粉煤灰掺入提高硅灰基自密实地聚合物混凝土的力学性能和微观结构完整性

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

Materials Letters Pub Date : 2025-04-06 DOI:10.1016/j.matlet.2025.138541

Ahmed Babeker Elhag , Abdellatif Selmi , Zeeshan Ahmad , Nejib Ghazouani

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引用次数: 0

摘要

本研究探讨了城市生活垃圾焚烧飞灰（MFA）对二氧化硅烟基自密实地聚合物混凝土（SGC）的影响。在五种混合物中，MFA取代了0-40 %重量的硅灰。坍落度流动、v型漏斗和l型箱试验结果表明，加入MFA后，可加工性得到改善。28 天后，当MFA置换率为20% %时，达到了最高的抗压强度（44.12 MPa）和劈裂抗拉强度（3.87 MPa），由于地聚合和收缩的改变，降低强度进一步增加。SEM证实孔隙减少，而TGA结果表明质量损失增加1.18 %，表明地聚合得到改善。过量的MFA（≥30 %）会增加孔隙率和开裂，由于未反应的颗粒和碳化作用而降低性能。

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Enhancing mechanical properties and microstructural integrity of silica fume-based self-compacting geopolymer concrete through municipal solid waste incineration fly ash incorporation

This study examines the impact of municipal solid waste incineration fly ash (MFA) on silica fume-based self-compacting geopolymer concrete (SGC). MFA replaced silica fume at 0–40 % by weight across five mixes. Results showed that workability improved with MFA incorporation, as shown by slump flow, V-funnel, and L-box tests. The highest compressive (44.12 MPa) and splitting tensile strengths (3.87 MPa) were achieved at 20 % MFA replacement after 28 days, with further increases reducing strength due to altered geopolymerization and shrinkage. SEM confirmed reduced voids, while TGA showed 1.18 % higher mass loss, indicating improved geopolymerization. Excess MFA (≥30 %) increased porosity and cracking, reducing performance due to unreacted particles and carbonation effects.

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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