Relationship between Fractal Dimension and Properties of Engineered Cementitious Composites with Different Aggregates
In this study, the effects of different fine aggregates on the properties of polyethylene fiber engineered cementitious composite (PE-ECC) were systematically investigated. The PE-ECCs were prepared with four fine aggregates, respectively. Furthermore, their flowability, compressive strength, and un...
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MDPI AG
2022-10-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/21/7666 |
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| author | Duotian Xia Ruilin Chen Duo Zhang Jianjun Cheng |
| author_facet | Duotian Xia Ruilin Chen Duo Zhang Jianjun Cheng |
| author_sort | Duotian Xia |
| collection | DOAJ |
| description | In this study, the effects of different fine aggregates on the properties of polyethylene fiber engineered cementitious composite (PE-ECC) were systematically investigated. The PE-ECCs were prepared with four fine aggregates, respectively. Furthermore, their flowability, compressive strength, and uniaxial tensile properties were studied experimentally and comparatively analyzed by microscopic techniques including X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive spectroscopy (EDS), and mercury intrusion porosimetry (MIP). The results showed that all the different types of fine aggregates exhibited little effect on the flowability of PE-ECC, but a greater effect on the compressive strength, uniaxial tensile strength, and ultimate tensile strain. PE-ECC prepared from untreated desert sand showed the best comprehensive performance, with compressive strength, uniaxial tensile strength, and ultimate tensile strain of 47.92 MPa, 6.26 MPa, and 3.638%, respectively. Moreover, it was found that the ultra-fine particles in the desert sand promoted the hydration reaction of cement and produced more C–S–H gels. The pore structures of ECC prepared with different aggregates exhibited obvious fractal characteristics, and the fractal dimension ranged from 2.8 to 2.9. The fractal dimension showed a strong correlation with parameters including ultimate tensile strain and pore structure, and the larger the fractal dimension, the smaller the ultimate tensile strain, porosity, and average pore size of ECC. |
| first_indexed | 2024-03-09T18:53:32Z |
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| id | doaj.art-2bcc826af02546ceb90c615d9ca8ac2b |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T18:53:32Z |
| publishDate | 2022-10-01 |
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| spelling | doaj.art-2bcc826af02546ceb90c615d9ca8ac2b2023-11-24T05:38:52ZengMDPI AGMaterials1996-19442022-10-011521766610.3390/ma15217666Relationship between Fractal Dimension and Properties of Engineered Cementitious Composites with Different AggregatesDuotian Xia0Ruilin Chen1Duo Zhang2Jianjun Cheng3College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi 832003, ChinaCollege of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi 832003, ChinaJinchuan Nickel Cobalt Research & Design Institute Co., Ltd., Jinchang 737100, ChinaCollege of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi 832003, ChinaIn this study, the effects of different fine aggregates on the properties of polyethylene fiber engineered cementitious composite (PE-ECC) were systematically investigated. The PE-ECCs were prepared with four fine aggregates, respectively. Furthermore, their flowability, compressive strength, and uniaxial tensile properties were studied experimentally and comparatively analyzed by microscopic techniques including X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive spectroscopy (EDS), and mercury intrusion porosimetry (MIP). The results showed that all the different types of fine aggregates exhibited little effect on the flowability of PE-ECC, but a greater effect on the compressive strength, uniaxial tensile strength, and ultimate tensile strain. PE-ECC prepared from untreated desert sand showed the best comprehensive performance, with compressive strength, uniaxial tensile strength, and ultimate tensile strain of 47.92 MPa, 6.26 MPa, and 3.638%, respectively. Moreover, it was found that the ultra-fine particles in the desert sand promoted the hydration reaction of cement and produced more C–S–H gels. The pore structures of ECC prepared with different aggregates exhibited obvious fractal characteristics, and the fractal dimension ranged from 2.8 to 2.9. The fractal dimension showed a strong correlation with parameters including ultimate tensile strain and pore structure, and the larger the fractal dimension, the smaller the ultimate tensile strain, porosity, and average pore size of ECC.https://www.mdpi.com/1996-1944/15/21/7666engineered cementitious compositespolyethylene fiberdesert sanduniaxial tensilefractal dimension |
| spellingShingle | Duotian Xia Ruilin Chen Duo Zhang Jianjun Cheng Relationship between Fractal Dimension and Properties of Engineered Cementitious Composites with Different Aggregates Materials engineered cementitious composites polyethylene fiber desert sand uniaxial tensile fractal dimension |
| title | Relationship between Fractal Dimension and Properties of Engineered Cementitious Composites with Different Aggregates |
| title_full | Relationship between Fractal Dimension and Properties of Engineered Cementitious Composites with Different Aggregates |
| title_fullStr | Relationship between Fractal Dimension and Properties of Engineered Cementitious Composites with Different Aggregates |
| title_full_unstemmed | Relationship between Fractal Dimension and Properties of Engineered Cementitious Composites with Different Aggregates |
| title_short | Relationship between Fractal Dimension and Properties of Engineered Cementitious Composites with Different Aggregates |
| title_sort | relationship between fractal dimension and properties of engineered cementitious composites with different aggregates |
| topic | engineered cementitious composites polyethylene fiber desert sand uniaxial tensile fractal dimension |
| url | https://www.mdpi.com/1996-1944/15/21/7666 |
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