Experimental Study on the Performance of Steel-Fiber-Reinforced Concrete for Remote-Pumping Construction
Remote-pumped concrete for infrastructure construction is a key innovation of the mechanized and intelligent construction technology. This has brought steel-fiber-reinforced concrete (SFRC) into undergoing various developments, from conventional flowability to high pumpability with low-carbon featur...
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MDPI AG
2023-05-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/10/3666 |
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| author | Minglei Zhao Changyong Li Jie Li Lixian Yue |
| author_facet | Minglei Zhao Changyong Li Jie Li Lixian Yue |
| author_sort | Minglei Zhao |
| collection | DOAJ |
| description | Remote-pumped concrete for infrastructure construction is a key innovation of the mechanized and intelligent construction technology. This has brought steel-fiber-reinforced concrete (SFRC) into undergoing various developments, from conventional flowability to high pumpability with low-carbon features. In this regard, an experimental study on the mixing proportion design and the pumpability and mechanical properties of SFRC was conducted for remote pumping. Using the absolute volume method based on the steel-fiber-aggregate skeleton packing test, the water dosage and the sand ratio were adjusted with an experimental study on reference concrete with the premise of varying the volume fraction of steel fiber from 0.4% to 1.2%. The test results of the pumpability of fresh SFRC indicated that the pressure bleeding rate and the static segregation rate were not the controlling indices due to the fact that they were far below the limits of the specifications, and the slump flowability fitted for remote-pumping construction was verified by a lab pumping test. Although the rheological properties of the SFRC charactered by the yield stress and the plastic viscosity increased with the volume fraction of steel fiber, those of mortar used as a lubricating layer during the pumping was almost constant. The cubic compressive strength of the SFRC had a tendency to increase with the volume fraction of steel fiber. The reinforcement effect of steel fiber on the splitting tensile strength of the SFRC was similar to the specifications, while its effect on the flexural strength was higher than the specifications due to the special feature of steel fibers distributed along the longitudinal direction of the beam specimens. The SFRC had excellent impact resistance with an increased volume fraction of steel fiber and presented acceptable water impermeability. |
| first_indexed | 2024-03-11T03:32:46Z |
| format | Article |
| id | doaj.art-cbc5d505a8824a86af01aae6bdf7216b |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T03:32:46Z |
| publishDate | 2023-05-01 |
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| spelling | doaj.art-cbc5d505a8824a86af01aae6bdf7216b2023-11-18T02:14:19ZengMDPI AGMaterials1996-19442023-05-011610366610.3390/ma16103666Experimental Study on the Performance of Steel-Fiber-Reinforced Concrete for Remote-Pumping ConstructionMinglei Zhao0Changyong Li1Jie Li2Lixian Yue3School of Engineering, RMIT University, Melbourne 3001, AustraliaInternational Joint Research Lab for Eco-Building Materials and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, ChinaSchool of Engineering, RMIT University, Melbourne 3001, AustraliaInternational Joint Research Lab for Eco-Building Materials and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, ChinaRemote-pumped concrete for infrastructure construction is a key innovation of the mechanized and intelligent construction technology. This has brought steel-fiber-reinforced concrete (SFRC) into undergoing various developments, from conventional flowability to high pumpability with low-carbon features. In this regard, an experimental study on the mixing proportion design and the pumpability and mechanical properties of SFRC was conducted for remote pumping. Using the absolute volume method based on the steel-fiber-aggregate skeleton packing test, the water dosage and the sand ratio were adjusted with an experimental study on reference concrete with the premise of varying the volume fraction of steel fiber from 0.4% to 1.2%. The test results of the pumpability of fresh SFRC indicated that the pressure bleeding rate and the static segregation rate were not the controlling indices due to the fact that they were far below the limits of the specifications, and the slump flowability fitted for remote-pumping construction was verified by a lab pumping test. Although the rheological properties of the SFRC charactered by the yield stress and the plastic viscosity increased with the volume fraction of steel fiber, those of mortar used as a lubricating layer during the pumping was almost constant. The cubic compressive strength of the SFRC had a tendency to increase with the volume fraction of steel fiber. The reinforcement effect of steel fiber on the splitting tensile strength of the SFRC was similar to the specifications, while its effect on the flexural strength was higher than the specifications due to the special feature of steel fibers distributed along the longitudinal direction of the beam specimens. The SFRC had excellent impact resistance with an increased volume fraction of steel fiber and presented acceptable water impermeability.https://www.mdpi.com/1996-1944/16/10/3666steel-fiber-reinforced concreteremote pumpingmix proportionpumpabilityrheologystrength |
| spellingShingle | Minglei Zhao Changyong Li Jie Li Lixian Yue Experimental Study on the Performance of Steel-Fiber-Reinforced Concrete for Remote-Pumping Construction Materials steel-fiber-reinforced concrete remote pumping mix proportion pumpability rheology strength |
| title | Experimental Study on the Performance of Steel-Fiber-Reinforced Concrete for Remote-Pumping Construction |
| title_full | Experimental Study on the Performance of Steel-Fiber-Reinforced Concrete for Remote-Pumping Construction |
| title_fullStr | Experimental Study on the Performance of Steel-Fiber-Reinforced Concrete for Remote-Pumping Construction |
| title_full_unstemmed | Experimental Study on the Performance of Steel-Fiber-Reinforced Concrete for Remote-Pumping Construction |
| title_short | Experimental Study on the Performance of Steel-Fiber-Reinforced Concrete for Remote-Pumping Construction |
| title_sort | experimental study on the performance of steel fiber reinforced concrete for remote pumping construction |
| topic | steel-fiber-reinforced concrete remote pumping mix proportion pumpability rheology strength |
| url | https://www.mdpi.com/1996-1944/16/10/3666 |
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