26224ab4184a136f282-1c49 20230204060103661 beie:beie director@blueeyesintelligence.org WEB-FORM International Journal of Recent Technology and Engineering (IJRTE) IJRTE 22773878 10.35940/ijrte.2277-3878 https://www.ijrte.org/ 01 30 2023 11 5 Research Scholar, Department of Civil Engineering, Puducherry Technological University, Puducherry, India V. Jaladevi https://orcid.org/0000-0002-3024-7106 V. Murugaiyan https://orcid.org/0000-0001-7001-6129 Professor & HOD, Department of Civil Engineering, Puducherry Technological University, Puducherry, India Expansive soil is generally found in arid and semi-arid regions of the world. One of the main issues with these expansive soils is their swelling properties when their natural water content increases. The various swell-shrink tendencies of expansive soils cause numerous issues with the substructure and distress in infrastructures such as buildings, pavements, and breast walls, among others. Geotechnical engineers have worked hard to understand the behavior of expanding soil and implement appropriate management strategies. The current study aims to elucidate the efficacy of alcofine-1203 and Phosphogypsum (PG) powder in achieving the geotechnical properties of soil and improving its high swell, high shrink, and low bearing capacity, which have benefits for civil engineering. The combination of the two materials can be more beneficial when used as a stabilizing agent than using them individually. An experimental programme has calculated the effects of alcofine-1203 (3, 6, 9, and 12%) and Phosphogypsum (0.25, 0.5, 0.75, and 1.0%) on the Atterberg limits, optimum moisture content (OMC), unconfined compressive strength (UCS), maximum dry density (MDD), and other essential soil characteristics. Both admixtures were added independently and blended into the expansive soil. It was found that the liquid limit, plasticity index, optimum moisture content, and swelling behavior of the expansive soil have been greatly reduced with the addition of specified admixtures. UCS gradually increases from 46.4 kPa to 948 kPa after 56 days due to the combined effect of 12% alccofine and 1.0% Phosphogypsum reacting with soil, which plays a critical role when compared to the remaining admixture combination. Hence, the result concluded that the addition of 12% alccofine and 1.0% PG exhibited an essential improver of expansive soils, proved that adding the admixture is a potential stabilizer, and also proved that the problematic soil was transformed into the best soil. It also reduced the construction cost by making the best use of locally available materials. 01 30 2023 93 98 CC BY-NC-ND 4.0 10.35940/BEIESP.CrossMarkPolicy www.ijrte.org true No funding was received for this work. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. We further confirm that any aspects of the work covered in this manuscript that has involved human patients has been conducted with the ethical approval of all relevant bodies and that such approvals are acknowledged within the manuscript. The data that support the findings of this study are available from the corresponding author upon reasonable request. V. Jaladevi: Conceptualization, Methodology, Writing-original draft. V. Murugaiyan: Visualization, Supervision and editing. 10.35940/ijrte.E7432.0111523 https://www.ijrte.org/portfolio-item/E74320111523/