External sulfate attack on cement-based materials in underground structures with the stray current
Abstract
Sulfate attack significantly affects the durability of underground concrete structures. However, more research is still needed to understand the mechanism and behavior of sulfate attack under the influence of stray currents. The behavior and mechanism of sulfate attack of cementitious materials under the effect of stray currents are thoroughly investigated in this work utilizing experimental techniques such as appearance morphological analysis, uniaxial compression tests, mass tests, ultrasonic tests, chemical analysis, SEM, XRD, etc. In the meantime, submerge samples in a sulfate solution for comparison. The findings of the study demonstrate that stray current considerably speeds up the sulfate attack process of cementitious materials. The primary effect of stray current is to speed up the rate at which additional erosion media enters the test piece's interior. There is a consistent trend in changes of specimens in appearance, compressive strength, weight, and ultrasonic wave velocity under the stray current. However, compared to compressive strength and weight, there is a maximum decrease in the ultrasonic wave velocity of the specimen. This study lays a theoretical foundation for predicting the performance degradation of cement-based materials under the combined action of stray currents and sulfate.
Details
- Organisationseinheit(en)
-
Institut für Photonik
Fakultät für Mathematik und Physik
- Externe Organisation(en)
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Chongqing University
University of Tokyo (UTokyo)
Tongji University
Shenzhen University
- Typ
- Artikel
- Journal
- Construction and Building Materials
- Band
- 465
- Anzahl der Seiten
- 10
- ISSN
- 0950-0618
- Publikationsdatum
- 28.02.2025
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Tief- und Ingenieurbau, Bauwesen, Allgemeine Materialwissenschaften
- Elektronische Version(en)
-
https://doi.org/10.1016/j.conbuildmat.2025.140284 (Zugang:
Geschlossen
)
