อิทธิพลของวัสดุพอลิเมอร์ต่อกำลังอัดแกนเดียวของดินเหนียวอ่อนกรุงเทพผสมปูนซีเมนต์ปอร์ตแลนด์

Abstract

This research investigated the unconfined compressive strength (UCS) of soft Bangkok clay stabilized with Portland cement type I and polymer materials. The initial water content (w) of soft Bangkok clay (SC) of 1.0LL, 1.5LL, and 2.0LL (LL is Liquid Limit of SC) and water/cement ratio (w/C) of 1.0 were used. Polymer materials (P) used in this study were polyethylene glycol (PEG), polyvinyl alcohol (PVA), and polyvinylpyrrolidone (PVP). Concentrations of P were 1, 3, 5, and 7% by volume of water. The 7-day and 28-day UCS of samples were examined. The test results found that w of 1.0LL and P concentration of 3% of SC-C-P samples offered the highest 28-day UCS, which were 1.20, 1.12, and 1.04 MPa for PEG, PVA, and PVP, respectively, and passed the UCS requirement specified by Department of Highway. The use of polymers in SC-C samples not only increased UCS but also improved ductility of sample.