Experimental study of particle lift initiation on roller-compacted sand-clay mixtures
| Autor: | MurzynFrédéric, LarrarteFrédérique, SedikiOuardia, Le VernMickael, RazakamanantsoaAndry |
|---|---|
| Přispěvatelé: | Géomatériaux et Modèles Géotechniques (GERS-GMG), Université Gustave Eiffel, École Supérieure des Techniques Aéronautiques et de Construction Automobile (ESTACA), Sols, Roches et Ouvrages Géotechniques (GERS-SRO) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
TESTING OF MATERIALS
CHANTIER 0211 other engineering and technologies macromolecular substances 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences [SPI]Engineering Sciences [physics] POLLUTION Geochemistry and Petrology Environmental Chemistry Geotechnical engineering Waste Management and Disposal 021101 geological & geomatics engineering 0105 earth and related environmental sciences Nature and Landscape Conservation Water Science and Technology fungi POUSSIERE food and beverages social sciences Geotechnical Engineering and Engineering Geology GENIE CIVIL Lift (force) Damages population characteristics Environmental science SOIL STABILISATION AND STRENGTH ENVIRONMENTAL ENGINEERING |
| Zdroj: | Environmental Geotechnics Environmental Geotechnics, 2020, pp.12. ⟨10.1680/jenge.19.00172⟩ |
| ISSN: | 2051-803X |
| DOI: | 10.1680/jenge.19.00172⟩ |
| Popis: | Civil engineering works are sources of dust emissions, which can cause severe security, health and environmental damages to workers and neighbourhoods. This is particularly significant for implementation of earthwork sites. The present paper reports a study conducted to characterise the soil–atmosphere interaction above compacted soils where particle lift is initiated. Mixtures of kaolin clay and sand have been compacted using a laboratory roller compactor that reproduces near-field compaction conditions. Shear testing conducted at the interface confirms that the sand content affects the friction angle between the soil and the compaction roller. The experimental velocity profiles above the compacted samples have been obtained in a wind tunnel using a non-intrusive measurement technique (laser Doppler velocimetry). Results show that the sand fraction affects velocity profiles. Compaction, therefore, may not fully reduce the roughness of the soil surface. The airflow friction velocities at the sample surfaces have been determined from the boundary layer profiles. The results achieved demonstrate that all tested soils reach the threshold friction velocity required to initiate particle lift, and the higher the sand content of the soil, the more likely it is that particle lift occurs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|