Development of novel and green construction materials by strategically coupling the use of the multiple waste streams as supplementary cementitious materials

• Main Author: William
• Other Authors: Grzegorz Lisak
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2022
• Subjects: Engineering::Civil engineering
• Online Access: https://hdl.handle.net/10356/154679
• Institution: Nanyang Technological University

The aim of this project is to explore the potential of municipal solid waste (MSW) slag from waste by-products as supplementary cementitious material (SCM) towards achieving 70% overall recycling rate by 2030 as steered in the Singapore Sustainability Blueprint 2015. To begin with, the study is evaluated based on various particles sizes of MSW slag correspond to its structural performance in the concrete mix design. To relate more between the effect of particles sizes with the strength of design mix in terms of pozzolanic reaction occurrence, the study of the XRD is done and it shows not much pozzolanic reaction at ages of 7th. However, with reference to the TGA analysis, early yield strength recorded can be derived from the product of hydration of cement to form calcium silicate hydrate (CSH) in finer particles mix especially (WS6) that record the highest 7th-day strength even higher than WS8 (control sand). To summarise, the results obtained in this study has shown that MSW slag possesses great potential as green construction materials to be added as supplementary cementitious material due to its comparable structural performance and fulfil the requirement of leachate studies. Nevertheless, further studies should be conducted over a longer timescale covering the curing age and other requirements such as fire safety, corrosion protection before assuming it can be safely applied in real-world application of concrete design that embraces sustainability in mind.