Understanding the thermomechanical behavior of geopolymer foams: Influence of rate and type of foaming agent and stabilizer

IF 2.218 Q2 Chemistry

Chemical Data Collections Pub Date : 2023-12-25 DOI:10.1016/j.cdc.2023.101111

Ghizlane Moutaoukil , Isabel Sobrados , Saliha Alehyen , M'hamed Taibi

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引用次数: 0

Abstract

This study assesses the impact of foaming agent type/content (hydrogen peroxide and Zn powder) and stabilizer content on the mechanical, thermal and microstructural of the elaborated geopolymer foams. Eighteen geopolymer foams were synthesized and their microstructure, density, porosity and compressive strength were analyzed before and after exposure to high temperatures (300 and 600 °C). To characterize the raw materials and the samples, several techniques were used, including X-ray fluorescence, X-ray diffraction, Magic-Angle Spinning Nuclear Magnetic Resonance Spectroscopy (²⁹Si and ²⁷Al MAS NMR), scanning electron microscopy (SEM), and porosity measurements. Thermogravimetric analysis was also performed to assess the thermal stability of the geopolymer foams with different foaming agent content and type. According to the results, the geopolymer foam with Zn powder as a foaming agent was more stable after exposure to the high temperature. The porosity increased after exposure to 300 °C, meanwhile decreasing after annealing at 600 °C.

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了解土工聚合物泡沫的热力学行为：发泡剂和稳定剂的速度和类型的影响

本研究评估了发泡剂类型/含量（过氧化氢和锌粉）和稳定剂含量对所制土工聚合物泡沫的机械、热和微观结构的影响。我们合成了 18 种土工聚合物泡沫，并分析了它们在暴露于高温（300 和 600°C）前后的微观结构、密度、孔隙率和抗压强度。为了确定原材料和样品的特性，使用了多种技术，包括 X 射线荧光、X 射线衍射、魔角旋转核磁共振谱（29Si 和 27Al MAS NMR）、扫描电子显微镜（SEM）和孔隙率测量。此外，还进行了热重分析，以评估不同发泡剂含量和类型的土工聚合物泡沫的热稳定性。结果表明，以 Zn 粉为发泡剂的土工聚合物泡沫在暴露于高温后更加稳定。气孔率在暴露于 300 摄氏度后增加，而在 600 摄氏度退火后减少。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Data Collections Chemistry-Chemistry (all)

CiteScore

6.10

自引率

0.00%

发文量

169

审稿时长

24 days

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