• Ismat Iqbal Bhat
• Nupur Subhashini

One of the principal and significant procedures in the construction of a pavement is the sub-grade stabilization of soil. Flexible pavement sub-grade is most prone to breakdown under the vehicle loads since the load from overlying layers is non-uniform and also the moisture content is very high. Various sub-grade soils show strength at low moisture content; such as clayey soils, however the strength and workability decrease with the expansion in water content past the optimum value. Such soils need to be either changed with better-quality fill material or given a reasonable treatment process. Substituting the sub-grade soil may not generally be the most ideal choice due to uneconomical hauling cost of the unearthed materials and the imported quality materials as well. In certain regions, the deficiency of the reasonable fill materials or the unavailability of aggregate makes replacing the frail sub-grade soil too costly. In such conditions, the engineering properties of the current frail sub-grade soil can be enhanced by the utilization of legitimate compaction techniques and by using some chemical stabilizers as well. Lime, Portland cement and fly-ash are the most widely recognized kinds of chemical stabilizers that are used to make the frail sub-grades stabilized. The primary targets of this undertaking i:e, stabilization of sub-grade soil of a pavement using fly-Ash as additive is to enhance the soil’s bearing capacity and permeability of soil including its protection from weathering action. The stabilizing sub-grade soil can bring about diminishing the thickness of other pavement layers when admitted in pavement design. According to some recent practice it has been found that the combination of lime and Class F fly-ash stabilization can be efficiently designed for long-lasting operation. In view of the previous studies done, stabilization with fly-ash enacted sub-grade saw as a successful alternative in improving the qualities of the soil. In such manner a test program was attempted to observe the impact brought about by the activity of fly-ash stabilization on the geotechnical trademarks of weak sub-grade soils. For the examination of the soil stabilized with fly-ash, CBR, Compaction, specific gravity, sieve analysis, water absorption test is performed. Properties utilized for investigating are Plastic Limit, Liquid Limit, California Bearing Ratio and Optimum Moisture Content.

Fly-ash, Pavements, Compaction, CBR

"REVIEW ON ANALYSIS OF STABILITY OF SUB-GRADE SOIL OF A PAVEMENT USING FLY-ASH AS ADDITIVE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 8, page no.1345-1349, August-2020, Available :http://www.jetir.org/papers/JETIR2008172.pdf

"REVIEW ON ANALYSIS OF STABILITY OF SUB-GRADE SOIL OF A PAVEMENT USING FLY-ASH AS ADDITIVE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 8, page no. pp1345-1349, August-2020, Available at : http://www.jetir.org/papers/JETIR2008172.pdf