Results 61 to 70 of about 1,015 (204)

Comparison of Real Response and Theoretical Modeling of Pavement with Thick Asphalt Layers under Heavy Traffic Load

open access: yesAdvances in Civil Engineering, 2019
Two kinds of asphalt pavement with thick asphalt layers were used to construct two samples. In structure I, a semirigid base and graded crushed stone subbase were used. In structure II, a granular base and semirigid subbase layer were used.
Jingsong Shan   +3 more
doaj   +1 more source

Numerical Analysis of the Dynamic Behavior of the Ballasted Railway Track Under Loading of Trains at Variable Speeds to Improve the Prediction of Dynamic Amplification Factors and Damage to Its Components

open access: yesShock and Vibration, Volume 2025, Issue 1, 2025.
This study contributes to the dynamic amplification effects of different speeds of trains on the behavior of the ballasted railway. The damage mechanisms of the main components of ballasted railway tracks were investigated in 3D numerical modeling using the PLAXIS code. Several moving speeds have been tested.
Zoa Ambassa   +2 more
wiley   +1 more source

Permanent deformation of unbound granular materials: A review

open access: yesJournal of Traffic and Transportation Engineering (English ed. Online)
Several studies have been conducted in the pavement area to try to understand the elastoplastic behavior of unbound granular materials (UGMs) under cyclic loading.
Hugo Alexander Rondón-Quintana   +2 more
doaj   +1 more source

Estado del arte del relleno fluido, para subbases y bases granulares (Primera parte)

open access: yesCiencia e Ingeniería Neogranadina, 2002
El artículo presenta una recopilación de información actualizada sobre el tema de los Rellenos Fluidos, normalmente conocidos en la literatura técnica como 'materiales de baja densidad y de baja resistencia controladas'. Lafinalidad de tal información es sentar una conceptualización básica sobre el tema, de modo que sirva como punto de partida para un ...
Santaella Valencia, Luz Helena   +1 more
openaire   +6 more sources

Ecotoxicological assessment of waste foundry sands and the application of different classification systems

open access: yesIntegrated Environmental Assessment and Management, Volume 20, Issue 6, Page 2294-2311, November 2024.
Abstract The application of a battery of bioassays is widely recognized as a useful tool for assessing environmental hazard samples. However, the integration of different toxicity data is a key aspect of this assessment and remains a challenge. The evaluation of industrial waste leachates did not initially undergo any of the proposed integration ...
Carlotta Alias   +4 more
wiley   +1 more source

Effective Shoulder Design and Maintenance: TR-531, 2007 [PDF]

open access: yes, 2007
Granular shoulders are an important element of the transportation system and are constantly subjected to performance problems due to wind- and water-induced erosion, rutting, edge drop-off, and slope irregularities.

core  

Reinforced SnO2 tensile‐strength and “buffer‐spring” interfaces for efficient inorganic perovskite solar cells

open access: yesCarbon Energy, Volume 6, Issue 6, June 2024.
Polyacrylic acid (PAA) is used to reinforce the toughness of SnO2 and passivate SnO2 defects, forming an ideal “reinforced concrete” structure. PAA is also introduced into the SnO2/perovskite interface as a “buffer spring” to release residual strain, which acts as a “dual‐side passivation interlayer” to passivate interface defects.
Yuanyuan Zhao   +8 more
wiley   +1 more source

Estudio Del Procedimiento De Trituración Para La Elaboración De Una Subbase Y Base Granular Y Compactación En Obra Vial [PDF]

open access: yes, 2009
El tema seleccionado para el estudio nace entre el tercer y quinto semestre; en el tercer semestre, se presentó el trabajo y se expuso el tema de Subbase y Base Granular en las asignaturas de Vías y Pavimentos y Laboratorio de Suelos orientada por los ...
Ramirez M., John E.
core  

Runoff water loaded with road de‐icing salts: Occurrence, environmental impact and treatment processes

open access: yesWater and Environment Journal, Volume 38, Issue 1, Page 20-31, February 2024.
Abstract To ensure road safety during winter, it is necessary to use de‐icing salts. However, the detrimental effects of these salts on aquatic ecosystems, vegetation, lakes, ground and surface water, and soils have become a major concern in recent years.
Mitra Ebrahimi Gardeshi   +3 more
wiley   +1 more source

Compaction Testing of Granular Material [PDF]

open access: yes, 2018
The South Dakota Department of Transportation SDDOT uses the Ohio Highway Department’s Typical Moisture Density Curves for preforming compaction quality control on granular soil materials in junction with standard moisture density relations.
Weber, Jason Jerome
core   +1 more source

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