文章基本信息

标题：Mechanical Behaviour of Soil Improved by Alkali Activated Binders
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作者：Enza Vitale ; Giacomo Russo ; Gianfranco Dell’Agli 等
期刊名称：Environments
电子版ISSN：2076-3298
出版年度：2017
卷号：4
期号：4
页码：80
DOI：10.3390/environments4040080
语种：English
出版社：MDPI Publishing
摘要：The use of alkali activated binders to improve engineering properties of clayey soils is a novel solution, and an alternative to the widely diffused improvement based on the use of traditional binders such as lime and cement. In the paper the alkaline activation of two fly ashes, by-products of coal combustion thermoelectric power plants, has been presented. These alkali activated binders have been mixed with a clayey soil for evaluating the improvement of its mechanical behaviour. One-dimensional compression tests on raw and treated samples have been performed with reference to the effects induced by type of binder, binder contents and curing time. The experimental evidences at volume scale of the treated samples have been directly linked to the chemo-physical evolution of the binders, investigated over curing time by means of X Ray Diffraction. Test results showed a high reactivity of the alkali activated binders promoting the formation of new mineralogical phases responsible for the mechanical improvement of treated soil. The efficiency of alkali activated binders soil treatment has been highlighted by comparison with mechanical performance induced by Portland cement.
关键词：alkali activated binders; fly ash; soil improvement; mechanical behaviour alkali activated binders ; fly ash ; soil improvement ; mechanical behaviour