A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Impact of electrodialytic remediation of MSWI fly ash on hydration and mechanical properties of blends with Portland cement
Highlights EDR MSWI residues contributed to the strength development of PC mortar. XRD/TGA and thermodynamic modelling showed changes in AFm/AFt quantities. EDR shortened setting time and reduced gas evolution in mortars with MSWI FA.
Abstract Municipal solid waste incineration (MSWI) residues such as fly ash and air pollution control (APC) residues may serve as new supplementary cementitious materials (SCM). These SCMs may, however, require a pre-treatment to improve material properties. This study investigates the impact of electrodialytically remediated (EDR) MSWI residues to remove heavy metals and salts, on the phase development, setting, and compressive strength development of composite cements with 10 wt% cement replacement, compared to inert quartz or untreated (raw) MSWI residues. All treated MSWI residues showed reactivity in mortar, resulting in higher compressive strength than inert quartz, attributed to additional ettringite and monocarbonate formation. The results indicate that electrodialytical remediation improves the performance of MSWI fly ash in blends with Portland cement, while MSWI APC residues might be used without pre-treatment.
Impact of electrodialytic remediation of MSWI fly ash on hydration and mechanical properties of blends with Portland cement
Highlights EDR MSWI residues contributed to the strength development of PC mortar. XRD/TGA and thermodynamic modelling showed changes in AFm/AFt quantities. EDR shortened setting time and reduced gas evolution in mortars with MSWI FA.
Abstract Municipal solid waste incineration (MSWI) residues such as fly ash and air pollution control (APC) residues may serve as new supplementary cementitious materials (SCM). These SCMs may, however, require a pre-treatment to improve material properties. This study investigates the impact of electrodialytically remediated (EDR) MSWI residues to remove heavy metals and salts, on the phase development, setting, and compressive strength development of composite cements with 10 wt% cement replacement, compared to inert quartz or untreated (raw) MSWI residues. All treated MSWI residues showed reactivity in mortar, resulting in higher compressive strength than inert quartz, attributed to additional ettringite and monocarbonate formation. The results indicate that electrodialytical remediation improves the performance of MSWI fly ash in blends with Portland cement, while MSWI APC residues might be used without pre-treatment.
Impact of electrodialytic remediation of MSWI fly ash on hydration and mechanical properties of blends with Portland cement
Ebert, Benjamin A.R. (author) / Geiker, Mette R. (author) / Kunther, Wolfgang (author) / Kirkelund, Gunvor M. (author)
2021-10-05
Article (Journal)
Electronic Resource
English
Hydration properties of calcium sulfoaluminate-Portland cement blends
| Tema Archive | 2009
Hydration reactions in portland cement-silica fume blends
| Elsevier | 1984
Hydration and Mechanical Properties of Magnesia, Pulverized Fuel Ash, and Portland Cement Blends
| British Library Online Contents | 2008
Hydration and Mechanical Properties of Magnesia, Pulverized Fuel Ash, and Portland Cement Blends
| Online Contents | 2008