Effect of magnesium chloride solution on the physico-chemical characteristics of tropical peat
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- 作者：Nima Latifi ; Ahmad Safuan A. Rashid ; Aminaton Marto…
- 关键词：Peat ; Chemical additive ; UCS ; Morphology ; Mineralogy ; Magnesium chloride (MgCl2)
- 刊名：Environmental Earth Sciences
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：75
- 期：3
- 全文大小：2,322 KB
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Ahmad Safuan A. Rashid (1)
Aminaton Marto (1)
Mahmood Md Tahir (2)
1. Geotechnic and Transportation Department, Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
2. Construction Research Centre (CRC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia - 刊物类别：Earth and Environmental Science
- 刊物主题：None Assigned
- 出版者：Springer Berlin Heidelberg
- ISSN：1866-6299
文摘
The stabilization of soils with additives is a chemical method that can be used to improve soils with weak engineering properties. Although the effects of non-traditional additives on the geotechnical properties of tropical soils have been subject of investigation in recent years, the effects of magnesium chloride (MgCl2) on the macro- and micro-structural characteristics of peat soil have not been fully studied. This study investigates the effect of MgCl2 on the physico-chemical characteristics of tropical peat. Unconfined compression strength tests were performed as an index of soil improvement in treated samples. In addition, the micro-structural characteristics of untreated and treated peat were investigated using various spectroscopic and microscopic techniques such as X-ray diffractometry, energy-dispersive X-ray spectrometry, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, and Brunauer, Emmett, and Teller surface area analysis. From an engineering point of view, the results indicated that the strength of MgCl2-stabilized peat improved significantly. The degree of improvement was approximately six times stronger than untreated peat, after a 7-day curing period. Additionally, the micro-structural study revealed that the stabilization process led to a few changes in the mineralogical, morphological, and molecular characteristics of the selected peat. The pores of the peat were filled by newly formed crystalline compounds known as magnesium aluminate hydrate (M–A–H).