Rapid detection and classification of aerosol events based on changes in particle size distribution

2000 ◽  
Author(s):  
Phillip D. Stroud ◽  
Christoph T. Cunningham ◽  
Gary Guethlein
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Rapid Detection

scholarly journals Comparison of laser diffraction method and hydrometer method for soil particle size distribution analysis

2021 ◽  
Vol 24 (1) ◽  
pp. 49-55
Author(s):  
Kateřina Sedláčková ◽  
Lenka Ševelová
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Distribution Curve ◽  
Diffraction Method ◽  
Laser Diffraction ◽  
Soil Science ◽  
Distribution Analysis

Abstract The article aims to present a comparative study of two methods used to determine the particle size distribution of fine and medium coarse soils. These methods are used to determine the grain size distribution curve in practice; however, for different purposes. The classical sedimentation method, based on the Stoke’s sedimentation law (hydrometer, areometric, the Casagrande’s method), standardized for a geotechnical classification of soils was compared with the laser diffraction method on the Mastersizer 3,000 analyser used for soil science purposes. The first comparison on nine samples showed significant differences, especially for larger fractions above 0.01 mm. All measured values of falls from laser diffraction analysis (LDA) showed higher values of all analysed fractions. It was also interesting to follow the trend between the tests for the preparation of conversion factors. The analysis also outlined the direction for further comparison. For the geotechnical use of the LDA, it will be necessary to take into account the sample preparation and processing before analysis.

ROAD CONSTRUCTION WORKS AS SOURCE OF DUST AIR POLLUTION

2014 ◽  
Vol 4 (2) ◽  
pp. 72-76 ◽  
Author(s):  
Pavel Alekseevich SIDYAKIN ◽  
Nikita Andreevich MARININ ◽  
Sergey Vladimirovich SHUL´GA ◽  
Konstantin Olegovich CHICHIROV
Keyword(s):  
Air Pollution ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Microscopic Analysis ◽  
Road Construction ◽  
Dust Extraction ◽  
To Receive ◽  
Construction Works

The causes of dust air pollution during road construction are viewed. The particulate analysis of dust generated at different cycles of road works executed by the procedure of microscopic analysis of the particle size distribution is done. The proposed algorithm allows to receive more precise classification of mass distribution on diameters, to equip work facilities with efficient dust extraction systems on different stages of road construction works.

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