Study of Strength Characteristics and Micro-structure Analysis of Soil Stabilized with Wastewater and Polymer

• Published in: International journal of pavement research & technology 2024-09, Vol.17 (5), p.1213-1224
• Main Authors: Khayat, Navid, Nasiri, Hadis
• Format: Article
• Language: English
• Subjects: Building Construction and Design; Byproducts; Civil Engineering; Clay minerals; Clay soils; Compressive strength; Engineering; Original Research Paper; Polymers; Sodium alginate; Soil analysis; Soil chemistry; Soil compressibility; Soil improvement; Soil stabilization; Soil strength; Soil structure; Soil water; Soils; Structural analysis; Structural Materials; Sugarcane; Vinasse; Wastewater
• ISSN: 1996-6814; 1997-1400
• DOI: 10.1007/s42947-023-00296-w

In recent years, individuals have begun to pay more attention to non-traditional stabilizers due to the problems connected with traditional stabilizers. Traditional stabilizers have undergone extensive investigation, and the mechanisms by which they act are well understood. This paper presents findings of the effect of sugarcane vinasse wastewater (VI) and sodium alginate (SA) polymer on the compressibility behavior, and microstructural evolution of clay soil using mixing method. The premise of this paper is to eliminate waste material from nature and compare the performance of this material against the use of polymers that have recently been used in improvement. The additives were dissolved in water and then introduced to the dried stratified soil to produce improved soil samples using the mixing technique. Transported unconfined compressive strength (UCS) was examined for 1, 14, and 28 days of treatments with additive ranges of 3–15% for VI and 0.25–1.25% for SA. In clay with high plasticity, the findings show that VI significantly influences increasing the UCS. With the addition of 9% vinasse to the soil at the age of 28 days, the UCS has increased by 78.8%. Additionally, the introduction of 1.25% SA to the soil has increased by 261.9% for the 28-day treatment efficiency significantly. Microstructural and chemical examination revealed that the mineralogical and morphological contents of the stabilized soil were influenced due to the pozzolanic reaction. The results showed that waste by-product liquid was able to significantly increase the strength and compressibility of the clay soil. Using a large volume of waste by-product liquid to stabilize soil, the researchers discovered a straightforward application method.