Geopolymers based on calcined tunisian clays: Effects of alkaline solution on vibrational spectra and mechanical properties

Q1 Earth and Planetary Sciences

International Journal of Mineral Processing Pub Date : 2017-08-10 DOI:10.1016/j.minpro.2017.05.012

Samira Selmani , Ali Sdiri , Samir Bouaziz , Sylvie Rossignol

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引用次数: 6

Abstract

The effects of alkaline solution and calcined clays on vibrational spectra and mechanical properties were studied on geopolymer samples prepared from two alkaline solutions, calcined clays and three metakaolins. Structural evolution of the prepared geopolymers was characterized using FTIR spectroscopy and compression tests. Our results indicated high positive correlation between reactivity and compressive strength of the studied samples. Commercial potassium silicate and laboratory prepared k-silicate solutions were used to assess their effects on the prepared geopolymers. It was also observed that various secondary phases appeared, causing a slight change in the species' reactivity. Finally, it was concluded that changing alkaline solution and calcined clays decreased the mechanical properties, but increased the FTIR shift values. However, further work is needed to study the effects of alkaline solutions and natural clays from Tunisia on the properties of the prepared geopolymer. This is compulsory for prospective application of those products in various industries.

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基于煅烧突尼斯粘土的地质聚合物：碱性溶液对振动光谱和力学性能的影响

研究了碱性溶液和煅烧粘土对两种碱性溶液、煅烧粘土和三种偏高岭土制备的地聚合物样品振动谱和力学性能的影响。利用红外光谱和压缩实验对制备的地聚合物的结构演化进行了表征。结果表明，样品的反应性与抗压强度呈正相关。用商业硅酸钾溶液和实验室制备的硅酸钾溶液对制备的地聚合物进行了评价。还观察到各种次生相的出现，引起了物种反应性的轻微变化。结果表明，改变碱性溶液和煅烧粘土降低了材料的力学性能，但增加了FTIR位移值。然而，需要进一步研究碱性溶液和突尼斯天然粘土对所制备的地聚合物性能的影响。这对于这些产品在各个行业的潜在应用是强制性的。

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来源期刊

International Journal of Mineral Processing 工程技术-工程：化工

CiteScore

3.02

自引率

0.00%

发文量

审稿时长

11.1 months

期刊介绍： International Journal of Mineral Processing has been discontinued as of the end of 2017, due to the merger with Minerals Engineering. The International Journal of Mineral Processing covers aspects of the processing of mineral resources such as: Metallic and non-metallic ores, coals, and secondary resources. Topics dealt with include: Geometallurgy, comminution, sizing, classification (in air and water), gravity concentration, flotation, electric and magnetic separation, thickening, filtering, drying, and (bio)hydrometallurgy (when applied to low-grade raw materials), control and automation, waste treatment and disposal. In addition to research papers, the journal publishes review articles, technical notes, and letters to the editor..