Research on the physical and chemical properties of gasification slag and their effect on the mechanical strength of slag-mortar at different curing ages

• Main Author: Chua, Jin Ming
• Other Authors: Tan Kang Hai
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2024
• Subjects: Engineering
• Online Access: https://hdl.handle.net/10356/177430
• Institution: Nanyang Technological University

This study investigates the viability of utilizing slag as a sustainable alternative material to fine aggregate in mortar applications. The project explores the potential of sludge-derived slag to replace natural sand in mortar mixes, focusing on its impact on mechanical properties, microstructure, and fire resistance. Compression and flexure tests were conducted to evaluate the strength characteristics of slag-mortar specimens, while scanning electron microscopy (SEM) analysis provided insights into the microstructural changes induced by slag incorporation. Additionally, heating tests simulated fire conditions to assess the performance of slag-mortar under high temperatures, followed by testing for residual compressive strength post-exposure. The findings suggest that slag-mortar exhibits promising mechanical properties comparable to natural sand-mortar mixes, with potential environmental benefits due to reduced reliance on natural sand resources. The heating tests demonstrate the fire-resistant nature of slag-mortar, with satisfactory residual compressive strength after exposure to elevated temperatures. Overall, this research contributes to exploration of sustainable construction materials and highlights the potential of slag as a viable alternative to conventional fine aggregate in mortar applications.