Development of a new green ultra-high-performance fibre-reinforced cementitious composites

Chai, Kin Yen (2024) Development of a new green ultra-high-performance fibre-reinforced cementitious composites. Final Year Project, UTAR.

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Abstract

Industries such as oleochemical and water treatment produce a substantial amount of waste by products, which include alum sludge ash and glycerine pitch, respectively. In spite of the noteworthy benefits that these industries provide for current development, the waste poses a problem due to the high disposal cost and waste management issues. For that reason, there is a pressing need to develop a financially and environmentally sustainable method of disposing of this waste. This study focused on investigating the feasibility of using waste materials namely alum sludge, and glycerine pitch, in the production of green Ultra-High-Performance Fibre Reinforced Cementitious Composites (UHPFRCC). In this study, alum sludge ash is used to partially replace sand in order to address the issue of sand scarcity that has resulted from overexploitation. Glycerine pitch is used to partially replace plasticiser in order to reduce the high cost associated with the production of UHPFRCC. This approach not only promotes the green practice of reusing waste materials but also ensures the financial and environmental sustainability of UHPFRCC production. This study adopted a phased approach to progressively develop, optimise, and produce the optimal UHPFRCC that strikes a balance between cost, environmental friendliness, and performance. The results from the study indicate that when both alum sludge ash and glycerine pitch are incorporated into the mix, it can enhance the density of the concrete, strength properties of the concrete, and concrete durability. For the replacement of sand with alum viii sludge ash and the replacement of plasticiser with glycerine pitch, the optimal levels are 4% and 10%, respectively

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