The Properties of High-Performance Concrete with Manganese Slag under Salt Action
Manganese slag (MS) containing a certain amount of active hydration substances may be used as a kind of cementitious material. In the present study, we measured the mass, the relative dynamic modulus of elasticity (RDME), and the flexural and compressive strengths of MS high-performance concrete (MS...
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MDPI AG
2024-03-01
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| author | Junchao Yang Hui Wang Ling Peng Fei Zhao |
| author_facet | Junchao Yang Hui Wang Ling Peng Fei Zhao |
| author_sort | Junchao Yang |
| collection | DOAJ |
| description | Manganese slag (MS) containing a certain amount of active hydration substances may be used as a kind of cementitious material. In the present study, we measured the mass, the relative dynamic modulus of elasticity (RDME), and the flexural and compressive strengths of MS high-performance concrete (MS-HPC) with added basalt fibers exposed to NaCl freeze–thaw cycles (N-FCs), NaCl dry–wet alternations (N-DAs), and Na<sub>2</sub>SO<sub>4</sub> dry–wet alternations (NS-DAs). Scanning electron microscope energy-dispersive spectrometer (SEM-EDS) spectra, thermogravimetric analysis (TG) curves, and X-ray diffraction spectroscopy (XRD) curves were obtained. The mass ratio of MS ranged from 0% to 40%. The volume ratio of basalt fibers varied from 0% to 2%. We found that, as a result of salt action, the mass loss rate (MLR) exhibited linear functions which were inversely correlated with the mass ratio of MS and the volume ratio of basalt fibers. After salt action, MLR increased by rates of 0~56.3%, but this increase was attenuated by the addition of MS and basalt fibers. Corresponding increases in RDME exhibited a linear function which was positively correlated with MS mass ratios in a range of 0~55.1%. The addition of MS and basalt fibers also led to decreased attenuation of mechanical strength, while the addition of MS led to increased levels of flocculent hydration products and the elements Mn, Mg, and Fe. CaClOH and CaSO<sub>4</sub> crystals were observed in XRD curves after N-DA and NS-DA actions, respectively. Finally, the addition of MS resulted in increased variation in TG values. However, the opposite result was obtained when dry–wet actions were exerted. |
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| language | English |
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| spelling | doaj.art-1aef223ddec641e1846ecb1cc9cd602c2024-04-12T13:21:47ZengMDPI AGMaterials1996-19442024-03-01177148310.3390/ma17071483The Properties of High-Performance Concrete with Manganese Slag under Salt ActionJunchao Yang0Hui Wang1Ling Peng2Fei Zhao3School of Civil Engineering, Hebei University of Architecture, Zhangjiakou 075000, ChinaSchool of Civil Engineering and Geographic Environment, Ningbo University, Ningbo 315000, ChinaDepartment of Mathematics and Physics, Hebei University of Architecture, Zhangjiakou 075000, ChinaSchool of Civil Engineering, Hebei University of Architecture, Zhangjiakou 075000, ChinaManganese slag (MS) containing a certain amount of active hydration substances may be used as a kind of cementitious material. In the present study, we measured the mass, the relative dynamic modulus of elasticity (RDME), and the flexural and compressive strengths of MS high-performance concrete (MS-HPC) with added basalt fibers exposed to NaCl freeze–thaw cycles (N-FCs), NaCl dry–wet alternations (N-DAs), and Na<sub>2</sub>SO<sub>4</sub> dry–wet alternations (NS-DAs). Scanning electron microscope energy-dispersive spectrometer (SEM-EDS) spectra, thermogravimetric analysis (TG) curves, and X-ray diffraction spectroscopy (XRD) curves were obtained. The mass ratio of MS ranged from 0% to 40%. The volume ratio of basalt fibers varied from 0% to 2%. We found that, as a result of salt action, the mass loss rate (MLR) exhibited linear functions which were inversely correlated with the mass ratio of MS and the volume ratio of basalt fibers. After salt action, MLR increased by rates of 0~56.3%, but this increase was attenuated by the addition of MS and basalt fibers. Corresponding increases in RDME exhibited a linear function which was positively correlated with MS mass ratios in a range of 0~55.1%. The addition of MS and basalt fibers also led to decreased attenuation of mechanical strength, while the addition of MS led to increased levels of flocculent hydration products and the elements Mn, Mg, and Fe. CaClOH and CaSO<sub>4</sub> crystals were observed in XRD curves after N-DA and NS-DA actions, respectively. Finally, the addition of MS resulted in increased variation in TG values. However, the opposite result was obtained when dry–wet actions were exerted.https://www.mdpi.com/1996-1944/17/7/1483manganese slagbasalt fibersmechanical strengthssalt actionX-ray diffraction spectroscopyscanning electron microscope |
| spellingShingle | Junchao Yang Hui Wang Ling Peng Fei Zhao The Properties of High-Performance Concrete with Manganese Slag under Salt Action Materials manganese slag basalt fibers mechanical strengths salt action X-ray diffraction spectroscopy scanning electron microscope |
| title | The Properties of High-Performance Concrete with Manganese Slag under Salt Action |
| title_full | The Properties of High-Performance Concrete with Manganese Slag under Salt Action |
| title_fullStr | The Properties of High-Performance Concrete with Manganese Slag under Salt Action |
| title_full_unstemmed | The Properties of High-Performance Concrete with Manganese Slag under Salt Action |
| title_short | The Properties of High-Performance Concrete with Manganese Slag under Salt Action |
| title_sort | properties of high performance concrete with manganese slag under salt action |
| topic | manganese slag basalt fibers mechanical strengths salt action X-ray diffraction spectroscopy scanning electron microscope |
| url | https://www.mdpi.com/1996-1944/17/7/1483 |
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