Journal Title : International Journal of Modern Trends in Engineering and Science
Paper Title : INFLUENCE IN STRENGTH OF CLAYEY SOIL USING ALKALI ACTIVATED FLY ASH
Volume 04 Issue 04 2017
ISSN no : 2348-3121
Page no: 171-174
Abstract – Ordinary Portland cement are used to stabilize clayey soils which have several shortcomings especially from an environmental perspective. Thus, it necessitates to undertake comprehensive research work to determine alternative treatment. Geopolymer is used as binder. The chemical reaction between alkali and fly-ash having alumina and silica contents creates alumina-silicate crystalline chain. Due to its high strength, low energy consumption and CO2 emission it offers an alternative to traditional binders like OPC. Present study is about to stabilize locally available clayey soil using sodium based alkaline activator and fly-ash. Activator is made from 1 molar of sodium silicate along with NaOH concentration of 8, 10 and 12 molar(M) and it is mixed at a ratio of 2:1. Fly ash is kept as 10%, 15% and 20% by weight of total solid (clay + fly ash) and finding optimum moisture content (OMC) for each mixture. Samples prepared at OMC and 3% dry side of OMC and effectiveness of the binder is tested using UCS test at curing periods of 7, 14 and 28 days and compared with that of common fly-ash based binder. Chemical analysis is conducted to know the chemical composition of fly-ash and clay. Result shows successive improvement in soil.
Key Words – CL, Fly Ash, Alkli Activated Fly Ash,Geopolymer, NaOH, Na2SiO3, Soil Stabilization, UCS
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