Strength properties and microstructural characterization of green cement composites having nano copper oxide and nano titania

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Letters Pub Date : 2024-11-26 DOI:10.1016/j.matlet.2024.137789

Ahmed A. Alawi Al-Naghi , Nabil Ben Kahla , Abdellatif Selmi , Zeeshan Ahmad , Nejib Ghazouani

引用次数: 0

Abstract

This study investigated the effects of nano titania (NT) and nano copper oxide (CO) on the strength and microstructural properties of fly ash-based green pozzolana Portland cement (PPC) composites. Adding 1 % NT increased the compressive strength by 49.8 %, 25 %, 17.9 %, and 4.1 % at 3, 7, 28, and 56 days, respectively compared to PPC samples without CO or NT. SEM images revealed disordered whisker crystals in the reference mix, while NT and CO mixes showed rod-like and needle-like crystals, with 0.5 % NT promoting C-H and flower-like crystals. EDX detected major elements like Ca, O, Si, and C. NT reduced pores and micro-cracks, boosting strength through C–S–H and ettringite formation. XRD results showed that CO increased C-H and ettringite peaks, while 1 % NT decreased C-H and silicate phases, enhancing hydration.

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纳米氧化铜和纳米二氧化钛绿色水泥复合材料的强度性能和微观结构表征

研究了纳米二氧化钛（NT）和纳米氧化铜（CO）对粉煤灰基绿火山灰硅酸盐水泥（PPC）复合材料强度和微观结构性能的影响。与不添加CO或NT的PPC样品相比，添加1% NT的样品在第3、7、28和56天的抗压强度分别提高了49.8%、25%、17.9%和4.1%。扫描电镜图像显示，参考混合物中有无序的晶须晶体，而NT和CO的混合物呈现棒状和针状晶体，0.5% NT促进了C-H和花状晶体的形成。EDX检测到Ca、O、Si和c等主要元素，NT减少了孔隙和微裂纹，通过C-S-H和钙矾石的形成提高了强度。XRD结果表明，CO增加了C-H和钙矾石峰，而1% NT降低了C-H和硅酸盐相，增强了水化作用。

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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