Eco-efficient high performance white concrete incorporating waste glass powder

• DOI: 10.1016/j.conbuildmat.2023.134556
• Publication Date: 2023-12-21T08:14:59Z
• Authors: Ana Mafalda Matos; Paula Milheiro-Ol...; Mário Pimentel
• Keywords: Silica fume; Cementitious; Filler (materials); Glass recycling; Fineness; Carbon Footprint

Portland cement and supplementary cementitious materials (SCM) are crucial components in the mixture design of High-Performance Concrete (HPC). In certain regions, constrained ready market availability SCM may limit widespread adoption HPC, namely when a long-term supply is envisaged. These circumstances demand research into sustainable cost-effective HPC mix designs independent expensive imported SCM, such as silica fume. Using locally available reduces costs carbon dioxide (CO2) emissions associated with production, while also assigning value to abundant industrial waste or by-products, glass powder. This study presents wide range more environmentally friendly white formulations suited for architectural applications. The proposed incorporate significant proportions limestone filler powder varying fineness, serving substantial partial replacements cement. An integrated assessment engineering properties was conducted, including flowability, electrical resistivity, mechanical strength, ecological balance. Response surface models material behaviour reveal that water-to-cement weight ratio (w/c) powder-to-cement (GP/c) have influence on both footprint HPC. Regression were used obtain high-flowable Five optimal mixtures selected featuring replacement (c) by (Lf) power (GP), Lf/c∈[0.38;0.78] GP/c∈[0.269;0.394]. reached cube compressive strengths ranging from 90 100 MPa, flexure 13–15 MPa range, resistivity levels between 90–180 ohm.m at 28 days.