Experimental study of 1-D Oedometer consolidation on some red clay soils of Pleistocene Barind Tract from Northern Bangladesh

• Published in: Innovative infrastructure solutions : the official journal of the Soil-Structure Interaction Group in Egypt (SSIGE) 2022-12, Vol.7 (6), Article 339
• Main Authors: Rana, Md. Shohel, Tasnim, Tamanna, Sayem, Hossain Md, Haque, Md. Emdadul
• Format: Article
• Language: English
• Subjects: Earth and Environmental Science; Earth Sciences; Environmental Science and Engineering; Foundations; Geoengineering; Geotechnical Engineering & Applied Earth Sciences; Hydraulics; Technical Paper
• ISSN: 2364-4176; 2364-4184
• DOI: 10.1007/s41062-022-00938-1

The stiff to hard red clay soil is widely distributed over the Barind Tract, which is the largest Pleistocene Tract in the northern Bangladesh that has a great geo-engineering interest. The aim of this paper is to evaluate the consolidation behavior of red clay soils from Barind Tract and try to establish a relationship of clay minerals with consolidation properties. In this analysis, the undisturbed specimens are tested by oedometer to a maximum applied load of 3200 kPa. The time-settlement plot shows that the rate of settlement is slow, and overall settlement is low for red clay soils. The studied soils are overconsolidated in nature obtained from preconsolidation pressure ( p′ C ), and shape of void ratio versus applied vertical stress ( p′ ) curves. The results of consolidation properties ( m v , C v , C c , C s and k ) suggested that the soils are stiff to hard, medium to very low compressibility, medium to low plasticity, and low permeability in nature. The consolidation parameters are variable for different specimens with each loading, and these parameters are directly related to stress–strain behavior of the soil. The type of clay minerals controls the consolidation, as evident by both kaolinite and illite have significantly influenced on the consolidation properties of red clay.