A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Eco-efficient high performance white concrete incorporating waste glass powder
https://orcid.org/0000-0002-1646-4665
https://orcid.org/0000-0003-4166-9379
https://orcid.org/0000-0001-8626-6018
Abstract Portland cement and supplementary cementitious materials (SCM) are crucial components in the mixture design of High-Performance Concrete (HPC). In certain regions, the constrained ready market availability of SCM may limit the widespread adoption of HPC, namely when a long-term supply is envisaged. These circumstances demand research into sustainable and cost-effective HPC mix designs independent of expensive and imported SCM, such as silica fume. Using locally available SCM reduces costs and the carbon dioxide (CO2) emissions associated with HPC production, while also assigning value to abundant industrial waste or by-products, such as glass powder. This study presents a wide range of more environmentally friendly white HPC formulations suited for architectural applications. The proposed formulations incorporate significant proportions of limestone filler and waste glass powder with varying fineness, serving as substantial partial replacements for white cement. An integrated assessment of engineering properties was conducted, including flowability, electrical resistivity, mechanical strength, and ecological balance. Response surface models of the material behaviour reveal that the water-to-cement weight ratio (w/c) and the glass powder-to-cement weight ratio (GP/c) have a significant influence on both the engineering properties and the ecological footprint of HPC. Regression models were used to obtain the high-flowable HPC. Five optimal mixtures were selected featuring significant partial replacement of cement (c) by limestone filler (Lf) and glass power (GP), with Lf/c∈[0.38;0.78] and GP/c∈[0.269;0.394]. These mixtures reached cube compressive strengths ranging from 90 to 100 MPa, flexure strengths in the 13–15 MPa range, and resistivity levels between 90–180 ohm.m at 28 days.
Graphical Abstract Display Omitted
Highlights Valorization of wastes from local glass industries. White Cement, limestone filler and glass powder are combined to produce HPC. DoE approach to optimize new ternary binder blends considering engineering and ecological balance. Cleaner blends for HPC mixtures are proposed for different multiple target engineering properties and environmental performance.
Eco-efficient high performance white concrete incorporating waste glass powder
https://orcid.org/0000-0002-1646-4665
https://orcid.org/0000-0003-4166-9379
https://orcid.org/0000-0001-8626-6018
Abstract Portland cement and supplementary cementitious materials (SCM) are crucial components in the mixture design of High-Performance Concrete (HPC). In certain regions, the constrained ready market availability of SCM may limit the widespread adoption of HPC, namely when a long-term supply is envisaged. These circumstances demand research into sustainable and cost-effective HPC mix designs independent of expensive and imported SCM, such as silica fume. Using locally available SCM reduces costs and the carbon dioxide (CO2) emissions associated with HPC production, while also assigning value to abundant industrial waste or by-products, such as glass powder. This study presents a wide range of more environmentally friendly white HPC formulations suited for architectural applications. The proposed formulations incorporate significant proportions of limestone filler and waste glass powder with varying fineness, serving as substantial partial replacements for white cement. An integrated assessment of engineering properties was conducted, including flowability, electrical resistivity, mechanical strength, and ecological balance. Response surface models of the material behaviour reveal that the water-to-cement weight ratio (w/c) and the glass powder-to-cement weight ratio (GP/c) have a significant influence on both the engineering properties and the ecological footprint of HPC. Regression models were used to obtain the high-flowable HPC. Five optimal mixtures were selected featuring significant partial replacement of cement (c) by limestone filler (Lf) and glass power (GP), with Lf/c∈[0.38;0.78] and GP/c∈[0.269;0.394]. These mixtures reached cube compressive strengths ranging from 90 to 100 MPa, flexure strengths in the 13–15 MPa range, and resistivity levels between 90–180 ohm.m at 28 days.
Graphical Abstract Display Omitted
Highlights Valorization of wastes from local glass industries. White Cement, limestone filler and glass powder are combined to produce HPC. DoE approach to optimize new ternary binder blends considering engineering and ecological balance. Cleaner blends for HPC mixtures are proposed for different multiple target engineering properties and environmental performance.
Eco-efficient high performance white concrete incorporating waste glass powder
https://orcid.org/0000-0002-1646-4665
https://orcid.org/0000-0003-4166-9379
https://orcid.org/0000-0001-8626-6018
Abstract Portland cement and supplementary cementitious materials (SCM) are crucial components in the mixture design of High-Performance Concrete (HPC). In certain regions, the constrained ready market availability of SCM may limit the widespread adoption of HPC, namely when a long-term supply is envisaged. These circumstances demand research into sustainable and cost-effective HPC mix designs independent of expensive and imported SCM, such as silica fume. Using locally available SCM reduces costs and the carbon dioxide (CO2) emissions associated with HPC production, while also assigning value to abundant industrial waste or by-products, such as glass powder. This study presents a wide range of more environmentally friendly white HPC formulations suited for architectural applications. The proposed formulations incorporate significant proportions of limestone filler and waste glass powder with varying fineness, serving as substantial partial replacements for white cement. An integrated assessment of engineering properties was conducted, including flowability, electrical resistivity, mechanical strength, and ecological balance. Response surface models of the material behaviour reveal that the water-to-cement weight ratio (w/c) and the glass powder-to-cement weight ratio (GP/c) have a significant influence on both the engineering properties and the ecological footprint of HPC. Regression models were used to obtain the high-flowable HPC. Five optimal mixtures were selected featuring significant partial replacement of cement (c) by limestone filler (Lf) and glass power (GP), with Lf/c∈[0.38;0.78] and GP/c∈[0.269;0.394]. These mixtures reached cube compressive strengths ranging from 90 to 100 MPa, flexure strengths in the 13–15 MPa range, and resistivity levels between 90–180 ohm.m at 28 days.
Graphical Abstract Display Omitted
Highlights Valorization of wastes from local glass industries. White Cement, limestone filler and glass powder are combined to produce HPC. DoE approach to optimize new ternary binder blends considering engineering and ecological balance. Cleaner blends for HPC mixtures are proposed for different multiple target engineering properties and environmental performance.
Eco-efficient high performance white concrete incorporating waste glass powder
Matos, Ana Mafalda (author) / Milheiro-Oliveira, Paula (author) / Pimentel, Mário (author)
2023-12-09
Article (Journal)
Electronic Resource
English
F , 28d, Flexure strength at 28 days (MPa) , WGP , Waste Glass Powder , GP , Waste glass powder with d<inf>50</inf> = 35 µm , GP<inf>f</inf> , Waste glass powder with d<inf>50</inf> = 10 µm , GP/c , Glass powder to cement mass ratio (50 % GP + 50 % GP<inf>f</inf>) , h , Hours , HPC , High-performance concrete , HR , Relative Humidity (%) , LF , Limestone filler , LF/c , Limestone filler to cement weight ratio , LOI , Loss on ignition (%) , PC , Portland cement , Rc , 28d, Compressive strength at 28 days (MPa) , Resist , 7d, Electrical resistivity at 7 days (Ωm) , 14d, Electrical resistivity at 14 days (Ωm) , 21d, Electrical resistivity at 21 days (Ωm) , 28d, Electrical resistivity at 28 days (Ωm) , SCM , Supplementary cementitious materials , SEM , Scanning electron microscopy , Sp/p , Superplasticizer to powder mass ratio , Vw/Vp , Water to powder volume ratio , w/c , water to cement weight ratio , w/b , water to binder weight ratio , GWP , Global warming potential (Kg CO<inf>2</inf>/m<sup>3</sup>) , CI , Embodied carbon dioxide index (kg CO<inf>2</inf>/MPa) , SI , Unit of cement strength contribution index (MPa/kg of cement) , Ecological performance , Material modelling behaviour , Response surface models , Waste glass powder , White cement
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