Deterioration of Cementitious Materials in Wastewater Treatment Plants’ Pumping Stations and Sand-Trap Structures
Wastewater treatment plants (WWTPs) are critical infrastructures for wastewater management, and their durability is crucial. Due to their excellent water tightness and strength, cementitious materials are used to build WWTPs. However, the performance of these materials is affected by aggressive envi...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-02-01
|
| Series: | Journal of Composites Science |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2504-477X/8/2/60 |
| _version_ | 1797297798713966592 |
|---|---|
| author | Nedson T. Kashaija Viktória Gável Krett Gergely Kovago Akos Miklós Kürthy Csaba Szabó Erika Tóth Zsuzsanna Szabó-Krausz |
| author_facet | Nedson T. Kashaija Viktória Gável Krett Gergely Kovago Akos Miklós Kürthy Csaba Szabó Erika Tóth Zsuzsanna Szabó-Krausz |
| author_sort | Nedson T. Kashaija |
| collection | DOAJ |
| description | Wastewater treatment plants (WWTPs) are critical infrastructures for wastewater management, and their durability is crucial. Due to their excellent water tightness and strength, cementitious materials are used to build WWTPs. However, the performance of these materials is affected by aggressive environments. There are few in situ experiments in the literature regarding the deterioration of cementitious materials in WWTPs. This paper investigates their deterioration mechanisms in a sewage pumping station and a sand-trap structure of a WWTP. In situ experiment was conducted by exposing cement specimens in both locations for 1, 2, 3 and 7 months. The physical and morphological changes of the specimens were examined using stereo microscopy and scanning electron microscopy, whereas the mineralogical/solid phase changes were examined using X-ray diffraction. The results showed that the specimens from the pumping station formed colored surface products, which were confirmed to be secondary minerals (i.e., gypsum and ettringite), whereas there were no colored surface products in the sand-trap structure. The results demonstrated that cementitious materials subjected to wastewater vapors (in a pumping station) had higher deterioration effects than those subjected to wastewater liquid (in a sand-trap structure), suggesting that the wastewater vapors are more aggressive toward cementitious materials than wastewater liquids. |
| first_indexed | 2024-03-07T22:26:36Z |
| format | Article |
| id | doaj.art-55ed917eac2d496e87d8a8d46dcc66b7 |
| institution | Directory Open Access Journal |
| issn | 2504-477X |
| language | English |
| last_indexed | 2024-03-07T22:26:36Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Composites Science |
| spelling | doaj.art-55ed917eac2d496e87d8a8d46dcc66b72024-02-23T15:22:36ZengMDPI AGJournal of Composites Science2504-477X2024-02-01826010.3390/jcs8020060Deterioration of Cementitious Materials in Wastewater Treatment Plants’ Pumping Stations and Sand-Trap StructuresNedson T. Kashaija0Viktória Gável1Krett Gergely2Kovago Akos3Miklós Kürthy4Csaba Szabó5Erika Tóth6Zsuzsanna Szabó-Krausz7Lithosphere Fluid Research Lab, Eötvös Loránd University, Pázmány P. s. 1/C, 1117 Budapest, HungaryCement Industry Research & Development Ltd. (CEMKUT Ltd.), Bécsi út 122-124, 1034 Budapest, HungaryDepartment of Microbiology, Eötvös Loránd University, Pázmány P. s. 1/C, 1117 Budapest, HungaryLithosphere Fluid Research Lab, Eötvös Loránd University, Pázmány P. s. 1/C, 1117 Budapest, HungaryTransdanubian Regional Waterworks Ltd., Szabolcsi u. 40, 2481 Velence, HungaryLithosphere Fluid Research Lab, Eötvös Loránd University, Pázmány P. s. 1/C, 1117 Budapest, HungaryDepartment of Microbiology, Eötvös Loránd University, Pázmány P. s. 1/C, 1117 Budapest, HungaryLithosphere Fluid Research Lab, Eötvös Loránd University, Pázmány P. s. 1/C, 1117 Budapest, HungaryWastewater treatment plants (WWTPs) are critical infrastructures for wastewater management, and their durability is crucial. Due to their excellent water tightness and strength, cementitious materials are used to build WWTPs. However, the performance of these materials is affected by aggressive environments. There are few in situ experiments in the literature regarding the deterioration of cementitious materials in WWTPs. This paper investigates their deterioration mechanisms in a sewage pumping station and a sand-trap structure of a WWTP. In situ experiment was conducted by exposing cement specimens in both locations for 1, 2, 3 and 7 months. The physical and morphological changes of the specimens were examined using stereo microscopy and scanning electron microscopy, whereas the mineralogical/solid phase changes were examined using X-ray diffraction. The results showed that the specimens from the pumping station formed colored surface products, which were confirmed to be secondary minerals (i.e., gypsum and ettringite), whereas there were no colored surface products in the sand-trap structure. The results demonstrated that cementitious materials subjected to wastewater vapors (in a pumping station) had higher deterioration effects than those subjected to wastewater liquid (in a sand-trap structure), suggesting that the wastewater vapors are more aggressive toward cementitious materials than wastewater liquids.https://www.mdpi.com/2504-477X/8/2/60cement and concretewastewater treatment plantdeteriorationdurabilityordinary Portland cement |
| spellingShingle | Nedson T. Kashaija Viktória Gável Krett Gergely Kovago Akos Miklós Kürthy Csaba Szabó Erika Tóth Zsuzsanna Szabó-Krausz Deterioration of Cementitious Materials in Wastewater Treatment Plants’ Pumping Stations and Sand-Trap Structures Journal of Composites Science cement and concrete wastewater treatment plant deterioration durability ordinary Portland cement |
| title | Deterioration of Cementitious Materials in Wastewater Treatment Plants’ Pumping Stations and Sand-Trap Structures |
| title_full | Deterioration of Cementitious Materials in Wastewater Treatment Plants’ Pumping Stations and Sand-Trap Structures |
| title_fullStr | Deterioration of Cementitious Materials in Wastewater Treatment Plants’ Pumping Stations and Sand-Trap Structures |
| title_full_unstemmed | Deterioration of Cementitious Materials in Wastewater Treatment Plants’ Pumping Stations and Sand-Trap Structures |
| title_short | Deterioration of Cementitious Materials in Wastewater Treatment Plants’ Pumping Stations and Sand-Trap Structures |
| title_sort | deterioration of cementitious materials in wastewater treatment plants pumping stations and sand trap structures |
| topic | cement and concrete wastewater treatment plant deterioration durability ordinary Portland cement |
| url | https://www.mdpi.com/2504-477X/8/2/60 |
| work_keys_str_mv | AT nedsontkashaija deteriorationofcementitiousmaterialsinwastewatertreatmentplantspumpingstationsandsandtrapstructures AT viktoriagavel deteriorationofcementitiousmaterialsinwastewatertreatmentplantspumpingstationsandsandtrapstructures AT krettgergely deteriorationofcementitiousmaterialsinwastewatertreatmentplantspumpingstationsandsandtrapstructures AT kovagoakos deteriorationofcementitiousmaterialsinwastewatertreatmentplantspumpingstationsandsandtrapstructures AT mikloskurthy deteriorationofcementitiousmaterialsinwastewatertreatmentplantspumpingstationsandsandtrapstructures AT csabaszabo deteriorationofcementitiousmaterialsinwastewatertreatmentplantspumpingstationsandsandtrapstructures AT erikatoth deteriorationofcementitiousmaterialsinwastewatertreatmentplantspumpingstationsandsandtrapstructures AT zsuzsannaszabokrausz deteriorationofcementitiousmaterialsinwastewatertreatmentplantspumpingstationsandsandtrapstructures |