Study on the Basic Mechanical Properties of Waste Steel Fiber Reinforced Concrete After High-Temperature Exposure
The increasing incidence of urban fires poses significant threats to structural integrity, underscoring the urgent need for concrete materials with enhanced mechanical properties post-fire. Incorporating recycled waste steel fibers (WSF) from industrial byproducts into concrete not only bolsters its...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-03-01
|
| Series: | Buildings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-5309/15/7/1025 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849730835489488896 |
|---|---|
| author | Dan Yang Xiaopeng Ren Yongtao Gao Tao Fan Mingshuai Li Hui Lv |
| author_facet | Dan Yang Xiaopeng Ren Yongtao Gao Tao Fan Mingshuai Li Hui Lv |
| author_sort | Dan Yang |
| collection | DOAJ |
| description | The increasing incidence of urban fires poses significant threats to structural integrity, underscoring the urgent need for concrete materials with enhanced mechanical properties post-fire. Incorporating recycled waste steel fibers (WSF) from industrial byproducts into concrete not only bolsters its crack resistance but also advances circular economy principles by transforming industrial waste into valuable resources. Although a large amount of research has focused on native steel fiber-reinforced concrete, there is still a lack of systematic exploration on the optimal dosage and effectiveness of waste steel fibers in slowing down the strength degradation of concrete after high-temperature action. In this study, two grades of concrete (C40 and C60) containing 0%, 1%, and 2% WSF by volume were subjected to heating cycles ranging from 200 °C to 800 °C. Post-cooling evaluations encompassed mass loss quantification, cube compressive strength testing (using 100 mm<sup>3</sup> specimens), and splitting tensile tests conducted at a loading rate of 0.1 MPa/s. Results indicated that mass loss escalated to 11% at 800 °C, with C60 experiencing a 12% higher loss compared to C40. Compressive strength decreased by 15% for every 200 °C increment; however, the inclusion of 1% WSF significantly minimized this degradation, preserving 44.5% (for C40) and 37.8% (for C60) of the original strength at 800 °C. Notably, the splitting tensile strength of 1% WSF-reinforced C60 concrete exceeded that of plain concrete by 39.4% after exposure to 800 °C, demonstrating its superior crack-bridging capabilities. |
| format | Article |
| id | doaj-art-8b9717fa3cb74800988ca753030f9ec0 |
| institution | DOAJ |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj-art-8b9717fa3cb74800988ca753030f9ec02025-08-20T03:08:44ZengMDPI AGBuildings2075-53092025-03-01157102510.3390/buildings15071025Study on the Basic Mechanical Properties of Waste Steel Fiber Reinforced Concrete After High-Temperature ExposureDan Yang0Xiaopeng Ren1Yongtao Gao2Tao Fan3Mingshuai Li4Hui Lv5Department of Transportation and Municipal Engineering, Sichuan College of Architectural Technology, Deyang 618000, ChinaDepartment of Transportation and Municipal Engineering, Sichuan College of Architectural Technology, Deyang 618000, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059, ChinaCollege of Civil Environment and Architecture, Nanchang Hangkong University, Nanchang 330063, ChinaThe increasing incidence of urban fires poses significant threats to structural integrity, underscoring the urgent need for concrete materials with enhanced mechanical properties post-fire. Incorporating recycled waste steel fibers (WSF) from industrial byproducts into concrete not only bolsters its crack resistance but also advances circular economy principles by transforming industrial waste into valuable resources. Although a large amount of research has focused on native steel fiber-reinforced concrete, there is still a lack of systematic exploration on the optimal dosage and effectiveness of waste steel fibers in slowing down the strength degradation of concrete after high-temperature action. In this study, two grades of concrete (C40 and C60) containing 0%, 1%, and 2% WSF by volume were subjected to heating cycles ranging from 200 °C to 800 °C. Post-cooling evaluations encompassed mass loss quantification, cube compressive strength testing (using 100 mm<sup>3</sup> specimens), and splitting tensile tests conducted at a loading rate of 0.1 MPa/s. Results indicated that mass loss escalated to 11% at 800 °C, with C60 experiencing a 12% higher loss compared to C40. Compressive strength decreased by 15% for every 200 °C increment; however, the inclusion of 1% WSF significantly minimized this degradation, preserving 44.5% (for C40) and 37.8% (for C60) of the original strength at 800 °C. Notably, the splitting tensile strength of 1% WSF-reinforced C60 concrete exceeded that of plain concrete by 39.4% after exposure to 800 °C, demonstrating its superior crack-bridging capabilities.https://www.mdpi.com/2075-5309/15/7/1025WSFCstrength testmechanical properties after high temperaturestrengtheningtoughening |
| spellingShingle | Dan Yang Xiaopeng Ren Yongtao Gao Tao Fan Mingshuai Li Hui Lv Study on the Basic Mechanical Properties of Waste Steel Fiber Reinforced Concrete After High-Temperature Exposure Buildings WSFC strength test mechanical properties after high temperature strengthening toughening |
| title | Study on the Basic Mechanical Properties of Waste Steel Fiber Reinforced Concrete After High-Temperature Exposure |
| title_full | Study on the Basic Mechanical Properties of Waste Steel Fiber Reinforced Concrete After High-Temperature Exposure |
| title_fullStr | Study on the Basic Mechanical Properties of Waste Steel Fiber Reinforced Concrete After High-Temperature Exposure |
| title_full_unstemmed | Study on the Basic Mechanical Properties of Waste Steel Fiber Reinforced Concrete After High-Temperature Exposure |
| title_short | Study on the Basic Mechanical Properties of Waste Steel Fiber Reinforced Concrete After High-Temperature Exposure |
| title_sort | study on the basic mechanical properties of waste steel fiber reinforced concrete after high temperature exposure |
| topic | WSFC strength test mechanical properties after high temperature strengthening toughening |
| url | https://www.mdpi.com/2075-5309/15/7/1025 |
| work_keys_str_mv | AT danyang studyonthebasicmechanicalpropertiesofwastesteelfiberreinforcedconcreteafterhightemperatureexposure AT xiaopengren studyonthebasicmechanicalpropertiesofwastesteelfiberreinforcedconcreteafterhightemperatureexposure AT yongtaogao studyonthebasicmechanicalpropertiesofwastesteelfiberreinforcedconcreteafterhightemperatureexposure AT taofan studyonthebasicmechanicalpropertiesofwastesteelfiberreinforcedconcreteafterhightemperatureexposure AT mingshuaili studyonthebasicmechanicalpropertiesofwastesteelfiberreinforcedconcreteafterhightemperatureexposure AT huilv studyonthebasicmechanicalpropertiesofwastesteelfiberreinforcedconcreteafterhightemperatureexposure |