Cementitious Behavior of Argon Oxygen Decarburization Stainless Steel Slag and Its Stabilization on Chromium
The study mainly aims at the potential of Argon Oxygen Decarburization Slag (AODS) as a supplementary cementitious material and explores the mechanisms of stabilization/solidification (S/S) of chromium in cement-based composite pastes. The basic cementitious parameters, such as water requirement, se...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-09-01
|
| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/10/10/876 |
| _version_ | 1827705366166634496 |
|---|---|
| author | Ya-Jun Wang Ya-Nan Zeng Jun-Guo Li Yu-Zhu Zhang |
| author_facet | Ya-Jun Wang Ya-Nan Zeng Jun-Guo Li Yu-Zhu Zhang |
| author_sort | Ya-Jun Wang |
| collection | DOAJ |
| description | The study mainly aims at the potential of Argon Oxygen Decarburization Slag (AODS) as a supplementary cementitious material and explores the mechanisms of stabilization/solidification (S/S) of chromium in cement-based composite pastes. The basic cementitious parameters, such as water requirement, setting time, soundness, hydration characteristics, and strength indexes of composite binders, were examined through standard methods. The results showed that the most beneficial mineral phase in AODS for cementitious behavior was beta dicalcium silicate (β-C<sub>2</sub>S). The utilization of a higher AODS dosage in composite binders increased the water requirement and the setting time, while it decreased the hydration heat and the strength indexes. Although the AODS possessed limited cementitious properties, it conformed the Grade II steel slag powder qualified for concrete and cement. Sequential leaching tests were conducted targeting the leachability of chromium in the pastes with different AODS dosage and curing time. Results showed that with the lower AODS dosage and the longer curing time, the S/S efficiency for chromium leaching from the composite paste was better. Utilization of AODS as a cement substitute not only can recycle this solid waste and decrease the emission of CO<sub>2</sub> concerning cement production, but also helps to effectively reduce the chromium leaching risk. |
| first_indexed | 2024-03-10T16:01:07Z |
| format | Article |
| id | doaj.art-c9372f29086945d191e2777f7f942268 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T16:01:07Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-c9372f29086945d191e2777f7f9422682023-11-20T15:16:46ZengMDPI AGCrystals2073-43522020-09-01101087610.3390/cryst10100876Cementitious Behavior of Argon Oxygen Decarburization Stainless Steel Slag and Its Stabilization on ChromiumYa-Jun Wang0Ya-Nan Zeng1Jun-Guo Li2Yu-Zhu Zhang3School of Materials and Metallurgy, Northeastern University, Shenyang 110819, ChinaSchool of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, ChinaSchool of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, ChinaSchool of Materials and Metallurgy, Northeastern University, Shenyang 110819, ChinaThe study mainly aims at the potential of Argon Oxygen Decarburization Slag (AODS) as a supplementary cementitious material and explores the mechanisms of stabilization/solidification (S/S) of chromium in cement-based composite pastes. The basic cementitious parameters, such as water requirement, setting time, soundness, hydration characteristics, and strength indexes of composite binders, were examined through standard methods. The results showed that the most beneficial mineral phase in AODS for cementitious behavior was beta dicalcium silicate (β-C<sub>2</sub>S). The utilization of a higher AODS dosage in composite binders increased the water requirement and the setting time, while it decreased the hydration heat and the strength indexes. Although the AODS possessed limited cementitious properties, it conformed the Grade II steel slag powder qualified for concrete and cement. Sequential leaching tests were conducted targeting the leachability of chromium in the pastes with different AODS dosage and curing time. Results showed that with the lower AODS dosage and the longer curing time, the S/S efficiency for chromium leaching from the composite paste was better. Utilization of AODS as a cement substitute not only can recycle this solid waste and decrease the emission of CO<sub>2</sub> concerning cement production, but also helps to effectively reduce the chromium leaching risk.https://www.mdpi.com/2073-4352/10/10/876AOD slagcementitious propertystabilization/solidificationchromiumleachability |
| spellingShingle | Ya-Jun Wang Ya-Nan Zeng Jun-Guo Li Yu-Zhu Zhang Cementitious Behavior of Argon Oxygen Decarburization Stainless Steel Slag and Its Stabilization on Chromium Crystals AOD slag cementitious property stabilization/solidification chromium leachability |
| title | Cementitious Behavior of Argon Oxygen Decarburization Stainless Steel Slag and Its Stabilization on Chromium |
| title_full | Cementitious Behavior of Argon Oxygen Decarburization Stainless Steel Slag and Its Stabilization on Chromium |
| title_fullStr | Cementitious Behavior of Argon Oxygen Decarburization Stainless Steel Slag and Its Stabilization on Chromium |
| title_full_unstemmed | Cementitious Behavior of Argon Oxygen Decarburization Stainless Steel Slag and Its Stabilization on Chromium |
| title_short | Cementitious Behavior of Argon Oxygen Decarburization Stainless Steel Slag and Its Stabilization on Chromium |
| title_sort | cementitious behavior of argon oxygen decarburization stainless steel slag and its stabilization on chromium |
| topic | AOD slag cementitious property stabilization/solidification chromium leachability |
| url | https://www.mdpi.com/2073-4352/10/10/876 |
| work_keys_str_mv | AT yajunwang cementitiousbehaviorofargonoxygendecarburizationstainlesssteelslaganditsstabilizationonchromium AT yananzeng cementitiousbehaviorofargonoxygendecarburizationstainlesssteelslaganditsstabilizationonchromium AT junguoli cementitiousbehaviorofargonoxygendecarburizationstainlesssteelslaganditsstabilizationonchromium AT yuzhuzhang cementitiousbehaviorofargonoxygendecarburizationstainlesssteelslaganditsstabilizationonchromium |