Enhancing Geotechnical Properties of Clayey Soil with Nano Silica and Fly Ash

For civil engineering projects including foundations, embankments, bridges, tunnels, canals, and roads, clay soil is a challenge for all civil engineers and must be stabilized. All engineering requirements cannot be met by expansive soil, nor can it support the weight that the foundation transports to the ground. Soil should be of high quality, have a high bearing capacity value, be durable against water, and have a low permeability factor. The four primary sources of waste materials utilized to stabilize expansive clay soil are industrial, agricultural, mineral, and home. The investigation conducted to determine whether adding fly ash and nano silica to clayey soil improved its characteristics is described in this article. To get the ideal percentage of admixture needed for soil stability, different amounts of fly ash and nano silica are mixed with unaltered soil. Laboratory testing, including Atterberg’s limit, compaction, CBR, and UCS tests, were performed on both modified and unmodified clayey soil in this comparative study. These stabilization methods are also inexpensive and readily available waste materials. In this experiment, fly ash and nano silica were used to stabilize clayey soil. After fly ash was set at 15%, nano silica was adjusted to 04%, 06%, and 08%.