Experimental study on the triaxial compressive properties of UHPC with coarse aggregate steel slag micro powder under different confining pressures
Abstract In order to study the compressive properties of ultra-high performance concrete (UHPC) mixed with coarse aggregate and steel slag powder under different confining pressures, provide technical parameters for the application of UHPC in constrained structures such as steel pipes or stirrups, 2...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-04-01
|
| Series: | Scientific Reports |
| Subjects: | |
| Online Access: | https://doi.org/10.1038/s41598-025-96723-y |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850187352399413248 |
|---|---|
| author | Xianyuan Tang Chenzhuo Feng Bowen Ren Changhong Zhou Cong Peng |
| author_facet | Xianyuan Tang Chenzhuo Feng Bowen Ren Changhong Zhou Cong Peng |
| author_sort | Xianyuan Tang |
| collection | DOAJ |
| description | Abstract In order to study the compressive properties of ultra-high performance concrete (UHPC) mixed with coarse aggregate and steel slag powder under different confining pressures, provide technical parameters for the application of UHPC in constrained structures such as steel pipes or stirrups, 20 UHPC specimens were made with 5 different mix proportions. Triaxial compressive tests were carried out under four confining pressures (0 MPa, 5 MPa, 10 MPa and 15 MPa) by using Rock Top full stress multi-field coupling triaxial apparatus, and the stress-strain curves of UHPC specimens were obtained, and the failure of UHPC specimens was analysed. The results show that under uniaxial condition, the UHPC test block of steel slag powder is in the form of longitudinal splitting failure, when the confining pressure is 5 MPa and 10 MPa, the test block is in the form of oblique shear failure, and when the confining pressure is 15 MPa, the test block is in the form of horizontal shear failure of multiple cracks in the middle. The stress-strain curve of UHPC steel slag powder is basically straight in the front section. When there is no confining pressure, the curve has obvious peaks, and the curve drops rapidly after the peak point. When the confining pressure value σ2 ≥ 5 MPa, with the increase of confining pressure value, the rising section and peak point of the curve increase, and the downward trend after the peak point slows down. The peak stress and strain increase with the increase of confining pressure, but the growth rate slows down slightly and the deformation ability increases. With the increase of crushed stone content, the peak stress and strain of the specimen gradually decrease under the same confining pressure. Adding steel fibre can effectively strengthen the bond between cement matrix and make the specimen have good ductility. |
| format | Article |
| id | doaj-art-8f10b15637ed44a3add6c01f7e8dcd2b |
| institution | OA Journals |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-8f10b15637ed44a3add6c01f7e8dcd2b2025-08-20T02:16:06ZengNature PortfolioScientific Reports2045-23222025-04-0115111510.1038/s41598-025-96723-yExperimental study on the triaxial compressive properties of UHPC with coarse aggregate steel slag micro powder under different confining pressuresXianyuan Tang0Chenzhuo Feng1Bowen Ren2Changhong Zhou3Cong Peng4School of Architecture and Transportation Engineering, Guilin University of Electronic TechnologySchool of Architecture and Transportation Engineering, Guilin University of Electronic TechnologySchool of Architecture and Transportation Engineering, Guilin University of Electronic TechnologySchool of Architecture and Transportation Engineering, Guilin University of Electronic TechnologySchool of Architecture and Transportation Engineering, Guilin University of Electronic TechnologyAbstract In order to study the compressive properties of ultra-high performance concrete (UHPC) mixed with coarse aggregate and steel slag powder under different confining pressures, provide technical parameters for the application of UHPC in constrained structures such as steel pipes or stirrups, 20 UHPC specimens were made with 5 different mix proportions. Triaxial compressive tests were carried out under four confining pressures (0 MPa, 5 MPa, 10 MPa and 15 MPa) by using Rock Top full stress multi-field coupling triaxial apparatus, and the stress-strain curves of UHPC specimens were obtained, and the failure of UHPC specimens was analysed. The results show that under uniaxial condition, the UHPC test block of steel slag powder is in the form of longitudinal splitting failure, when the confining pressure is 5 MPa and 10 MPa, the test block is in the form of oblique shear failure, and when the confining pressure is 15 MPa, the test block is in the form of horizontal shear failure of multiple cracks in the middle. The stress-strain curve of UHPC steel slag powder is basically straight in the front section. When there is no confining pressure, the curve has obvious peaks, and the curve drops rapidly after the peak point. When the confining pressure value σ2 ≥ 5 MPa, with the increase of confining pressure value, the rising section and peak point of the curve increase, and the downward trend after the peak point slows down. The peak stress and strain increase with the increase of confining pressure, but the growth rate slows down slightly and the deformation ability increases. With the increase of crushed stone content, the peak stress and strain of the specimen gradually decrease under the same confining pressure. Adding steel fibre can effectively strengthen the bond between cement matrix and make the specimen have good ductility.https://doi.org/10.1038/s41598-025-96723-yUltra-high performance concreteSteel slag powderCoarse aggregateTriaxial testPeak stressFailure form |
| spellingShingle | Xianyuan Tang Chenzhuo Feng Bowen Ren Changhong Zhou Cong Peng Experimental study on the triaxial compressive properties of UHPC with coarse aggregate steel slag micro powder under different confining pressures Scientific Reports Ultra-high performance concrete Steel slag powder Coarse aggregate Triaxial test Peak stress Failure form |
| title | Experimental study on the triaxial compressive properties of UHPC with coarse aggregate steel slag micro powder under different confining pressures |
| title_full | Experimental study on the triaxial compressive properties of UHPC with coarse aggregate steel slag micro powder under different confining pressures |
| title_fullStr | Experimental study on the triaxial compressive properties of UHPC with coarse aggregate steel slag micro powder under different confining pressures |
| title_full_unstemmed | Experimental study on the triaxial compressive properties of UHPC with coarse aggregate steel slag micro powder under different confining pressures |
| title_short | Experimental study on the triaxial compressive properties of UHPC with coarse aggregate steel slag micro powder under different confining pressures |
| title_sort | experimental study on the triaxial compressive properties of uhpc with coarse aggregate steel slag micro powder under different confining pressures |
| topic | Ultra-high performance concrete Steel slag powder Coarse aggregate Triaxial test Peak stress Failure form |
| url | https://doi.org/10.1038/s41598-025-96723-y |
| work_keys_str_mv | AT xianyuantang experimentalstudyonthetriaxialcompressivepropertiesofuhpcwithcoarseaggregatesteelslagmicropowderunderdifferentconfiningpressures AT chenzhuofeng experimentalstudyonthetriaxialcompressivepropertiesofuhpcwithcoarseaggregatesteelslagmicropowderunderdifferentconfiningpressures AT bowenren experimentalstudyonthetriaxialcompressivepropertiesofuhpcwithcoarseaggregatesteelslagmicropowderunderdifferentconfiningpressures AT changhongzhou experimentalstudyonthetriaxialcompressivepropertiesofuhpcwithcoarseaggregatesteelslagmicropowderunderdifferentconfiningpressures AT congpeng experimentalstudyonthetriaxialcompressivepropertiesofuhpcwithcoarseaggregatesteelslagmicropowderunderdifferentconfiningpressures |