Experimental Analysis of the Fire-Induced Effects on the Physical, Mechanical, and Hydraulic Properties of Sloping Pyroclastic Soils
The paper investigates the changes in the physical, mechanical, and hydraulic properties of coarse-grained pyroclastic soils, considered under both wildfire-burned and laboratory heating conditions. The soil samples were collected on Mount “Le Porche” in the municipality of Siano (Campania Region, S...
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| Format: | Article |
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MDPI AG
2022-05-01
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| Series: | Geosciences |
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| Online Access: | https://www.mdpi.com/2076-3263/12/5/198 |
| _version_ | 1797499558548209664 |
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| author | Dario Peduto Luca Iervolino Vito Foresta |
| author_facet | Dario Peduto Luca Iervolino Vito Foresta |
| author_sort | Dario Peduto |
| collection | DOAJ |
| description | The paper investigates the changes in the physical, mechanical, and hydraulic properties of coarse-grained pyroclastic soils, considered under both wildfire-burned and laboratory heating conditions. The soil samples were collected on Mount “Le Porche” in the municipality of Siano (Campania Region, Southern Italy), hit by wildfires on 20 September 2019. The area is prone to fast-moving landslides, as testified by the disastrous events of 5–6 May 1998. The experimental results show that the analyzed surficial samples exhibited (<i>i)</i> grain size distribution variations due to the disaggregation of gravelly and sandy particles (mostly of pumice nature), (<i>ii)</i> chromatic changes ranging from black to reddish, (<i>iii)</i> changes in specific gravity in low-severity fire-burned soil samples different from those exposed to laboratory heating treatments; (<i>iv)</i> progressive reductions of shear strength, associated with a decrease in the cohesive contribution offered by the soil-root systems and, for more severe burns, even in the soil friction angle, and (<i>v)</i> changes in soil-water retention capacity. Although the analyses deserve further deepening, the appropriate knowledge on these issues could provide key inputs for geotechnical analyses dealing with landslide susceptibility on fire-affected slopes in unsaturated conditions. |
| first_indexed | 2024-03-10T03:49:06Z |
| format | Article |
| id | doaj.art-3b66ba27dfca4db4b3f96943e9e9a24f |
| institution | Directory Open Access Journal |
| issn | 2076-3263 |
| language | English |
| last_indexed | 2024-03-10T03:49:06Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Geosciences |
| spelling | doaj.art-3b66ba27dfca4db4b3f96943e9e9a24f2023-11-23T11:12:08ZengMDPI AGGeosciences2076-32632022-05-0112519810.3390/geosciences12050198Experimental Analysis of the Fire-Induced Effects on the Physical, Mechanical, and Hydraulic Properties of Sloping Pyroclastic SoilsDario Peduto0Luca Iervolino1Vito Foresta2Department of Civil Engineering, University of Salerno, 84084 Fisciano, ItalyDepartment of Civil Engineering, University of Salerno, 84084 Fisciano, ItalyDepartment of Civil Engineering, University of Salerno, 84084 Fisciano, ItalyThe paper investigates the changes in the physical, mechanical, and hydraulic properties of coarse-grained pyroclastic soils, considered under both wildfire-burned and laboratory heating conditions. The soil samples were collected on Mount “Le Porche” in the municipality of Siano (Campania Region, Southern Italy), hit by wildfires on 20 September 2019. The area is prone to fast-moving landslides, as testified by the disastrous events of 5–6 May 1998. The experimental results show that the analyzed surficial samples exhibited (<i>i)</i> grain size distribution variations due to the disaggregation of gravelly and sandy particles (mostly of pumice nature), (<i>ii)</i> chromatic changes ranging from black to reddish, (<i>iii)</i> changes in specific gravity in low-severity fire-burned soil samples different from those exposed to laboratory heating treatments; (<i>iv)</i> progressive reductions of shear strength, associated with a decrease in the cohesive contribution offered by the soil-root systems and, for more severe burns, even in the soil friction angle, and (<i>v)</i> changes in soil-water retention capacity. Although the analyses deserve further deepening, the appropriate knowledge on these issues could provide key inputs for geotechnical analyses dealing with landslide susceptibility on fire-affected slopes in unsaturated conditions.https://www.mdpi.com/2076-3263/12/5/198post-wildfire slopespyroclastic soilslaboratory testsshear strengthSWRCs |
| spellingShingle | Dario Peduto Luca Iervolino Vito Foresta Experimental Analysis of the Fire-Induced Effects on the Physical, Mechanical, and Hydraulic Properties of Sloping Pyroclastic Soils Geosciences post-wildfire slopes pyroclastic soils laboratory tests shear strength SWRCs |
| title | Experimental Analysis of the Fire-Induced Effects on the Physical, Mechanical, and Hydraulic Properties of Sloping Pyroclastic Soils |
| title_full | Experimental Analysis of the Fire-Induced Effects on the Physical, Mechanical, and Hydraulic Properties of Sloping Pyroclastic Soils |
| title_fullStr | Experimental Analysis of the Fire-Induced Effects on the Physical, Mechanical, and Hydraulic Properties of Sloping Pyroclastic Soils |
| title_full_unstemmed | Experimental Analysis of the Fire-Induced Effects on the Physical, Mechanical, and Hydraulic Properties of Sloping Pyroclastic Soils |
| title_short | Experimental Analysis of the Fire-Induced Effects on the Physical, Mechanical, and Hydraulic Properties of Sloping Pyroclastic Soils |
| title_sort | experimental analysis of the fire induced effects on the physical mechanical and hydraulic properties of sloping pyroclastic soils |
| topic | post-wildfire slopes pyroclastic soils laboratory tests shear strength SWRCs |
| url | https://www.mdpi.com/2076-3263/12/5/198 |
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