Soft clay stabilisation with expansive agent

• Main Author: Thiyagarajan, Shruthi
• Other Authors: Yi Yaolin
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2024
• Subjects: Earth and Environmental Sciences; Engineering; Geotechnical; Foundation; Civil
• Online Access: https://hdl.handle.net/10356/177000
• Institution: Nanyang Technological University

Singapore is made up of 40% marine clay, which is found to be very weak and requires stabilizing agents to provide additional strength to meet the soil requirements set by Building Construction Authority (BCA). Ordinary Portland Cement (OPC) stabilised clay is found to emit an excessive amount of carbon dioxide (CO2). Hence this project aims to investigate environmentally sustainable, commercially available expansive agents (EA) as well as laboratory-made EA in their ability to strengthen marine clay by relating to its flowability. A series of laboratory experiments were conducted to examine the flowability, water content and compressive strength. The results showed that soils with water content lower than 14g can produce a compressive strength greater than 100kPa within 28 days of curing. It is also found that the laboratory-made EA were both environmentally friendly and meets the Singapore strength requirement.