The Mechanical Strength of Ecological Cement Mortars Based on Fly Ash from the Combustion of Municipal Waste and Cement Kiln Dust
The article presents the physico-mechanical properties of cement mortars modified with the addition of fly ash generated from municipal waste incineration (MSWI-FA) and dust from rotary kiln dedusting installations (CKD—cement kiln dust) produced during cement manufacturing. The waste materials were...
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MDPI AG
2025-03-01
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| author | Alina Pietrzak Malgorzata Ulewicz |
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| description | The article presents the physico-mechanical properties of cement mortars modified with the addition of fly ash generated from municipal waste incineration (MSWI-FA) and dust from rotary kiln dedusting installations (CKD—cement kiln dust) produced during cement manufacturing. The waste materials were dosed separately and in combination—MSWI-FA in amounts of 10, 15, and 20% of the cement mass, with a volumetric adjustment of the standard sand mass, while CKD was used as a cement replacement in amounts of 10, 15, and 20% of the cement mass. Basic tests were conducted on the prepared mortars, including consistency and flexural and compressive strength after 7 and 28 days of curing, water absorption, bulk density, and resistance to freeze–thaw cycles. The results indicate that the addition of MSWI-FA and CKD reduces the strength of mortars compared to the control series, with CKD proving to be more effective and stable than MSWI-FA, especially over longer curing periods. The combination of MSWI-FA and CKD often resulted in the greatest decline in mechanical parameters, suggesting limited synergy between these materials. The best results were achieved using low additive concentrations, especially in the MSWI-FA-CKD/3–3 (i.e., after 3% of the MSWI-FA and CKD waste) combination. The research confirms the potential of utilizing MSWI-FA and CKD in sustainable cement compositions but highlights the need for further work on optimizing proportions and modification techniques. The importance of these efforts for reducing environmental impact and promoting a circular economy is emphasized. |
| format | Article |
| id | doaj-art-bc19d4dcb2f94bfaa8d2f93f4a919ceb |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-bc19d4dcb2f94bfaa8d2f93f4a919ceb2025-08-20T03:43:10ZengMDPI AGApplied Sciences2076-34172025-03-01156321510.3390/app15063215The Mechanical Strength of Ecological Cement Mortars Based on Fly Ash from the Combustion of Municipal Waste and Cement Kiln DustAlina Pietrzak0Malgorzata Ulewicz1Faculty of Civil Engineering, Czestochowa University of Technology, 42-201 Czestochowa, PolandFaculty of Civil Engineering, Czestochowa University of Technology, 42-201 Czestochowa, PolandThe article presents the physico-mechanical properties of cement mortars modified with the addition of fly ash generated from municipal waste incineration (MSWI-FA) and dust from rotary kiln dedusting installations (CKD—cement kiln dust) produced during cement manufacturing. The waste materials were dosed separately and in combination—MSWI-FA in amounts of 10, 15, and 20% of the cement mass, with a volumetric adjustment of the standard sand mass, while CKD was used as a cement replacement in amounts of 10, 15, and 20% of the cement mass. Basic tests were conducted on the prepared mortars, including consistency and flexural and compressive strength after 7 and 28 days of curing, water absorption, bulk density, and resistance to freeze–thaw cycles. The results indicate that the addition of MSWI-FA and CKD reduces the strength of mortars compared to the control series, with CKD proving to be more effective and stable than MSWI-FA, especially over longer curing periods. The combination of MSWI-FA and CKD often resulted in the greatest decline in mechanical parameters, suggesting limited synergy between these materials. The best results were achieved using low additive concentrations, especially in the MSWI-FA-CKD/3–3 (i.e., after 3% of the MSWI-FA and CKD waste) combination. The research confirms the potential of utilizing MSWI-FA and CKD in sustainable cement compositions but highlights the need for further work on optimizing proportions and modification techniques. The importance of these efforts for reducing environmental impact and promoting a circular economy is emphasized.https://www.mdpi.com/2076-3417/15/6/3215cement mortarcement kiln dustfly ash from municipal wastecompressive strengthflexural strength |
| spellingShingle | Alina Pietrzak Malgorzata Ulewicz The Mechanical Strength of Ecological Cement Mortars Based on Fly Ash from the Combustion of Municipal Waste and Cement Kiln Dust Applied Sciences cement mortar cement kiln dust fly ash from municipal waste compressive strength flexural strength |
| title | The Mechanical Strength of Ecological Cement Mortars Based on Fly Ash from the Combustion of Municipal Waste and Cement Kiln Dust |
| title_full | The Mechanical Strength of Ecological Cement Mortars Based on Fly Ash from the Combustion of Municipal Waste and Cement Kiln Dust |
| title_fullStr | The Mechanical Strength of Ecological Cement Mortars Based on Fly Ash from the Combustion of Municipal Waste and Cement Kiln Dust |
| title_full_unstemmed | The Mechanical Strength of Ecological Cement Mortars Based on Fly Ash from the Combustion of Municipal Waste and Cement Kiln Dust |
| title_short | The Mechanical Strength of Ecological Cement Mortars Based on Fly Ash from the Combustion of Municipal Waste and Cement Kiln Dust |
| title_sort | mechanical strength of ecological cement mortars based on fly ash from the combustion of municipal waste and cement kiln dust |
| topic | cement mortar cement kiln dust fly ash from municipal waste compressive strength flexural strength |
| url | https://www.mdpi.com/2076-3417/15/6/3215 |
| work_keys_str_mv | AT alinapietrzak themechanicalstrengthofecologicalcementmortarsbasedonflyashfromthecombustionofmunicipalwasteandcementkilndust AT malgorzataulewicz themechanicalstrengthofecologicalcementmortarsbasedonflyashfromthecombustionofmunicipalwasteandcementkilndust AT alinapietrzak mechanicalstrengthofecologicalcementmortarsbasedonflyashfromthecombustionofmunicipalwasteandcementkilndust AT malgorzataulewicz mechanicalstrengthofecologicalcementmortarsbasedonflyashfromthecombustionofmunicipalwasteandcementkilndust |