Influence of the Aggregate Surface Conditions on the Strength of Quick-Converting Track Concrete
This experimental study investigates the effects of the aggregate surface conditions on the compressive strength of quick-converting track concrete (QTC). The compressive strength of QTC and interfacial fracture toughness (IFT) were investigated by changing the amount of fine abrasion dust particles...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-06-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/10/6/543 |
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| author | Rahwan Hwang Il-Wha Lee Sukhoon Pyo Dong Joo Kim |
| author_facet | Rahwan Hwang Il-Wha Lee Sukhoon Pyo Dong Joo Kim |
| author_sort | Rahwan Hwang |
| collection | DOAJ |
| description | This experimental study investigates the effects of the aggregate surface conditions on the compressive strength of quick-converting track concrete (QTC). The compressive strength of QTC and interfacial fracture toughness (IFT) were investigated by changing the amount of fine abrasion dust particles (FADPs) on the aggregate surface from 0.00 to 0.15 wt% and the aggregate water saturation from 0 to 100%. The effects of aggregate water saturation on the compressive strength of the QTC and IFT were notably different, corresponding to the amount of FADPs. As the aggregate water saturation increased from 0 to 100%, in the case of 0.00 wt% FADPs, the IFT decreased from 0.91 to 0.58 MPa∙mm<sup>1/2</sup>, and thus, the compressive strength of the QTC decreased from 34.8 to 31.4 MPa because the aggregate water saturation increased the water/cement ratio at the interface and, consequently, the interfacial porosity. However, as the aggregate water saturation increased from 0 to 100%, in the case of 0.15 wt% FADPs, the compressive strength increased from 24.6 to 28.1 MPa, while the IFT increased from 0.41 to 0.88 MPa∙mm<sup>1/2</sup> because the water/cement ratio at the interface was reduced as a result of the absorption by the FADPs on the surface of the aggregates and the cleaning effects of the aggregate surface. |
| first_indexed | 2024-03-10T18:54:49Z |
| format | Article |
| id | doaj.art-f109cc18c0134f6499d65d11c1a0ab7e |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T18:54:49Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-f109cc18c0134f6499d65d11c1a0ab7e2023-11-20T04:51:27ZengMDPI AGCrystals2073-43522020-06-0110654310.3390/cryst10060543Influence of the Aggregate Surface Conditions on the Strength of Quick-Converting Track ConcreteRahwan Hwang0Il-Wha Lee1Sukhoon Pyo2Dong Joo Kim3Department of Civil and Environmental Engineering, Sejong University, 98 Gunja-Dong, Gwangjin-Gu, Seoul 05006, KoreaKorea Railroad Research Institute, 176 Railroad Museum Road, Uiwang-si, Gyeonggi-do 16105, KoreaSchool of Urban and Environmental Engineering, Ulsan National Institute of Sciences and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan 44919, KoreaDepartment of Civil and Environmental Engineering, Sejong University, 98 Gunja-Dong, Gwangjin-Gu, Seoul 05006, KoreaThis experimental study investigates the effects of the aggregate surface conditions on the compressive strength of quick-converting track concrete (QTC). The compressive strength of QTC and interfacial fracture toughness (IFT) were investigated by changing the amount of fine abrasion dust particles (FADPs) on the aggregate surface from 0.00 to 0.15 wt% and the aggregate water saturation from 0 to 100%. The effects of aggregate water saturation on the compressive strength of the QTC and IFT were notably different, corresponding to the amount of FADPs. As the aggregate water saturation increased from 0 to 100%, in the case of 0.00 wt% FADPs, the IFT decreased from 0.91 to 0.58 MPa∙mm<sup>1/2</sup>, and thus, the compressive strength of the QTC decreased from 34.8 to 31.4 MPa because the aggregate water saturation increased the water/cement ratio at the interface and, consequently, the interfacial porosity. However, as the aggregate water saturation increased from 0 to 100%, in the case of 0.15 wt% FADPs, the compressive strength increased from 24.6 to 28.1 MPa, while the IFT increased from 0.41 to 0.88 MPa∙mm<sup>1/2</sup> because the water/cement ratio at the interface was reduced as a result of the absorption by the FADPs on the surface of the aggregates and the cleaning effects of the aggregate surface.https://www.mdpi.com/2073-4352/10/6/543Interfacial transition zonequick-converting track concreteaggregate surface conditionrailway ballast |
| spellingShingle | Rahwan Hwang Il-Wha Lee Sukhoon Pyo Dong Joo Kim Influence of the Aggregate Surface Conditions on the Strength of Quick-Converting Track Concrete Crystals Interfacial transition zone quick-converting track concrete aggregate surface condition railway ballast |
| title | Influence of the Aggregate Surface Conditions on the Strength of Quick-Converting Track Concrete |
| title_full | Influence of the Aggregate Surface Conditions on the Strength of Quick-Converting Track Concrete |
| title_fullStr | Influence of the Aggregate Surface Conditions on the Strength of Quick-Converting Track Concrete |
| title_full_unstemmed | Influence of the Aggregate Surface Conditions on the Strength of Quick-Converting Track Concrete |
| title_short | Influence of the Aggregate Surface Conditions on the Strength of Quick-Converting Track Concrete |
| title_sort | influence of the aggregate surface conditions on the strength of quick converting track concrete |
| topic | Interfacial transition zone quick-converting track concrete aggregate surface condition railway ballast |
| url | https://www.mdpi.com/2073-4352/10/6/543 |
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