Abstract
Objectives: To find the optimal percentage of eggshell powder which when mixed with expansive soil results in effective foundations for buildings. Methods: In this study, samples from Katreni Kona near Amalapuram, East Godavari District of Andhra Pradesh in the southern part of India was selected to collect the expansive soil which was open excavated at 2.0 m depth beneath the surface of the ground for the study. Eggshell powder (ESP) mixed with expansive soil in different percentages of 5%, 10%, 15% and 20% by dry weight was considered for evaluation. The treated and untreated samples were subjected to Compaction, California bearing ratio (CBR) (soaked and unsoaked) and Unconfined compressive strength (UCS) tests. Findings: The clay content was reduced with an increase in density and liquid limit, subsequently the plastic limit was reduced with the increase of UCS by adding the eggshell powder to the soil. The optimal dried density of the soil was increased from 14.42 kN/m3, 14.59 kN/m3, 14.71 kN/m3, 14.88 kN/m3 and 14.81 kN/m3,and optimum moisture content was decreased from 28.24 %, 26.42%, 26.09%, 24.48% and 23.02% respectively when 0% to 20% of eggshell powder was mixed with soil. The CBR values were increased until 15% ESP at which the maximum value was attained, and further addition decreased the CBR. Novelty: The engineering nature of expansive soil is extremely enriched with ESP stabilization. The optimum percentage of ESP was 15% when compared with other percentages that were assessed in this investigation. The solidity of soil increased with a reduced number of voids that connect the soil cells, and consistency boundaries of the land were reduced by using ESP. The CBR value with a percentage increase of ESP indicated that the soil is more suitable for foundation. Keywords: Eggshell powder; Differential Free Swell (DFS); expansive soil; CBR; UCS; stabilization; compaction
Highlights
In recent days, enhancing the properties of soil is a serious concern owing to the fact that soils with enriched properties are typically are not readily available in nature or may be present in minor quantities so as to meet the construction requirements
It can be supposed that the increase of iron powder percentages in soil decreases the values of liquid limit and the plastic limit remains constant while decreasing the plasticity index (PI). 6% of iron powder in soil achieved the highest dry density and higher California bearing ratio (CBR) values
The utmost dried density of the soil has been increased from 14.42 kN/m3, 14.59 kN/m3, 14.71 kN/m3, 14.88 kN/m3 and 14.81 kN/m3,and optimum moisture content was decreasing from 28.24 %, 26.42%, 26.09%, 24.48% and 23.02% respectively when 0% to 20% of eggshell powder was blended with an addition of 5% Eggshell powder (ESP)
Summary
In recent days, enhancing the properties of soil is a serious concern owing to the fact that soils with enriched properties are typically are not readily available in nature or may be present in minor quantities so as to meet the construction requirements. Numerous problems were previously reported when constructions were raised using soft soil including issues towards shear failures, unnecessary settlements, differential settlements, etc One such alternative to overcome these issues is by the usage of fillers like eggshell powders, seashell powders, lime, etc., with the original soils so as to form stabilized soils. Srinadh et al, [3] and Atahu M.K. et al, [4] in improving the geotechnical properties of expansive soil with a study of expansive soil stabilization using industrial iron powder as an additive in various percentages. Samples of sticky soil possessing 0-1.25 liquidity index were combined with ESP over a dissimilar percentage of 0%, 10%, 15% and 20% levels They have carried out extensive laboratory analysis, and their results showed that how their selected mixture affects the properties like liquidity index and compressive strength. Increased liquidity index results in reduced strength, which was their foremost outcome
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
