Results 141 to 150 of about 64,873 (163)
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Wear, 2015
Abstract The Micro-Deval test (MD) is a standard procedure used to measure the resistance of aggregate materials to polishing abrasion; the results are related to the skid resistance of road surfaces. The purpose of the current work was to establish a correlation between the Micro-Deval test results on 11 different aggregates and their morphological ...
Dawei Wang +2 more
exaly +2 more sources
Abstract The Micro-Deval test (MD) is a standard procedure used to measure the resistance of aggregate materials to polishing abrasion; the results are related to the skid resistance of road surfaces. The purpose of the current work was to establish a correlation between the Micro-Deval test results on 11 different aggregates and their morphological ...
Dawei Wang +2 more
exaly +2 more sources
Granular Matter, 2019
Ballast grains in railway tracks progressively wear due to the efforts exerted by the continuous passage of trains and the periodic maintenance operations. The initial sharp edges and vertices of the grains tend to become smoother and the surface texture is removed. This change in morphology plays a key role on the proper behaviour of the ballast layer
Ivan Deirós Quintanilla +2 more
exaly +3 more sources
Ballast grains in railway tracks progressively wear due to the efforts exerted by the continuous passage of trains and the periodic maintenance operations. The initial sharp edges and vertices of the grains tend to become smoother and the surface texture is removed. This change in morphology plays a key role on the proper behaviour of the ballast layer
Ivan Deirós Quintanilla +2 more
exaly +3 more sources
Micro-Deval Testing of Aggregates in the Southeast
Transportation Research Record: Journal of the Transportation Research Board, 2003Aggregate used in hot-mix asphalt (HMA) must be tough and durable, not only to withstand the effects of HMA production, transportation, and construction but also to resist the effects of traffic and the environment. Historically, the Los Angeles abrasion and impact test has determined the toughness of aggregates.
L. Allen Cooley, Robert S. James
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Micro-Deval Test for the Assessment of Bituminous Aggregate Durability
Journal of ASTM International, 2007Abstract Bituminous aggregates from a total of 52 sources located in Texas, Oklahoma, Arkansas, New Mexico, and Missouri were evaluated using both Micro-Deval and magnesium sulfate soundness tests. Each aggregate was also characterized using petrography, absorption, and specific gravity.
PW Jayawickrama, MS Hossain, F Phillips
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Adaptation of the Micro-Deval Test for Assessing the Surface Weathering Degree of Granite
Journal of ASTM International, 2009Abstract The paper summarizes recent results obtained from a new wear test performed on fresh and artificially aged rocks. Four different types of granitic rocks with different mineral compositions and grain sizes were selected for this study.
Takarli, Mokhfi +2 more
openaire +3 more sources
Assessing the Micro-Deval Test for Compacted Dense-Graded Asphalt
Advances in Civil Engineering Materials, 2019Abstract In recent years, the asphalt industry has been increasingly evaluating mixture testing for a variety of purposes. This article assesses the Micro-Deval (MD) test for its ability to evaluate compacted dense-graded asphalt mixtures. Historically, the MD test has been used to evaluate durability characteristics of loose aggregates,
Rabeea W. Bazuhair +3 more
openaire +1 more source
Journal of Materials in Civil Engineering, 2008
This study presents the findings from a research investigation conducted to characterize the toughness/abrasion resistance and soundness of aggregates from 23 sources using the micro-Deval, Los Angeles (LA) abrasion, sodium sulfate soundness, and magnesium sulfate soundness tests.
Prasada Rao Rangaraju, Jonathan Edlinski
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This study presents the findings from a research investigation conducted to characterize the toughness/abrasion resistance and soundness of aggregates from 23 sources using the micro-Deval, Los Angeles (LA) abrasion, sodium sulfate soundness, and magnesium sulfate soundness tests.
Prasada Rao Rangaraju, Jonathan Edlinski
openaire +1 more source
Evaluation of Ballast Particle Degradation Under Micro-Deval Testing Using Photogrammetry
2021Railway ballast plays an important role in the economic efficiency and sustainability of the rail transport. In this context, the morphology of its particles, in what regards the shape, angularity and surface texture, is critical and affects the mechanical performance of this aggregate material.
André Paixão +3 more
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Long-Term Wear of Aggregates Assessed by Micro-Deval Tests
2018Aggregate tests are used worldwide to assess the durability of crushed stone. These standardized test methods aim to determine the resistance to wear by using given rotations as it is described in the European Norm of Micro-Deval test (EN 1097-1:2012). It recommends 12,000 rotations to determine the Micro-Deval coefficient of a rock.
Balázs Czinder, Ákos Török
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Characterization of Aggregate Susceptibility to Polishing Using the Micro-Deval Test
Transportation Research Record: Journal of the Transportation Research BoardSkid resistance is a critical pavement surface property affecting roadway safety, especially under wet weather conditions. This study evaluated the frictional characteristics of a wide variety of aggregates used in roadway construction in Ohio. The micro-Deval test was used to apply different levels of polishing (0, 60, 180, and 360 min) to each ...
Khalil Alafeef +2 more
openaire +1 more source