The construction industry increasingly emphasizes sustainability and durability, astmespecially in concrete technology, due to environmental concerns associated with cement production and the need for resilient infrastructure. A broader study which adopted the simplex centroid mixture design approach developed a self-consolidating concrete (SCC) mix with a ternary mixed binder, optimizing the content of waste glass powder (GP) and low-grade calcined clay (CC). The goal was to develop a more sustainable and durable SCC by reducing the reliance on traditional cement and divert glass waste from landfills. For this study, two types of concrete mixes were prepared: a control SCC mix (CM) with Portland limestone cement (PLC) as the only binder and another with the ternary mixed binder (TM). The ternary blend constituted of 73% PLC, 21% GP and 6% CC. The durability performance including water absorption, sorptivity, resistance to acid attack and rapid chloride permeability were evaluated over curing periods of 28, 56 and 90 days and compared with the control mix. Results indicate that TM had consistently lower water absorption (up to 13%), reduced initial sorptivity (up to 19%), and significantly better resistance to chloride ingress and acid attack compared to CM. The ternary blended SCC mix was found to be a more durable alternative to conventional PLC-based SCC, with reduced permeability and improved resistance to chemical attacks.

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Durability Performance of Ternary Blended Self-consolidating Concrete: A Comparative Study with Portland Limestone Cement-Based SCC

  • Timothy Kofi Ametefe,
  • Mark Bediako

摘要

The construction industry increasingly emphasizes sustainability and durability, astmespecially in concrete technology, due to environmental concerns associated with cement production and the need for resilient infrastructure. A broader study which adopted the simplex centroid mixture design approach developed a self-consolidating concrete (SCC) mix with a ternary mixed binder, optimizing the content of waste glass powder (GP) and low-grade calcined clay (CC). The goal was to develop a more sustainable and durable SCC by reducing the reliance on traditional cement and divert glass waste from landfills. For this study, two types of concrete mixes were prepared: a control SCC mix (CM) with Portland limestone cement (PLC) as the only binder and another with the ternary mixed binder (TM). The ternary blend constituted of 73% PLC, 21% GP and 6% CC. The durability performance including water absorption, sorptivity, resistance to acid attack and rapid chloride permeability were evaluated over curing periods of 28, 56 and 90 days and compared with the control mix. Results indicate that TM had consistently lower water absorption (up to 13%), reduced initial sorptivity (up to 19%), and significantly better resistance to chloride ingress and acid attack compared to CM. The ternary blended SCC mix was found to be a more durable alternative to conventional PLC-based SCC, with reduced permeability and improved resistance to chemical attacks.