Results 21 to 30 of about 2,645,404 (161)

Characterization of road surfacing aggregates based on their mineralogical fingerprint

Journal of Traffic and Transportation Engineering (English ed. Online), 2022
To ensure the safety of infrastructure users, the long-term skid resistance is a crucial factor and is determined in large by the mineralogical and morphological characteristics of surfacing aggregate.
Dawei Wang, Yulin He, Chonghui Wang, Zeyu Zhang, Guoyang Lu, Pengfei Liu, Markus Oeser   +6 more
doaj   +1 more source

Acoustic Performance Evaluation of Dense‐Graded Asphalt Pavements in Qatar

Advances in Civil Engineering, Volume 2021, Issue 1, 2021., 2021
There is pressing and growing demand from the public to design and construct roads with a low noise level. This paper investigated the acoustic performance of asphalt pavements in the State of Qatar to assist transport authorities in designing and constructing quieter pavements.
Okan Sirin, Md Ohiduzzaman, Emad Kassem, Wahid Hassan, Xiaoli Liu   +4 more
wiley   +1 more source

Prediction of Lifespan of Railway Ballast Aggregate According to Mechanical Properties of it

The Baltic Journal of Road and Bridge Engineering, 2017
As the railway lifespan is the main criterion for selection of the aggregate for ballast and for planning the maintenance of the railroad, it is important to define the relationship between the particle load resistant characteristics and a lifetime of ...
Vaidas Ramūnas, Audrius Vaitkus, Alfredas Laurinavičius, Donatas Čygas, Aurimas Šiukščius   +4 more
doaj   +1 more source

Statistical analysis of mechanical properties on the example of aggregates of Carpathian sandstones

Studia Geotechnica et Mechanica, 2020
The constantly growing, broadly understood, construction industry requires the use of a large amount of aggregates. The construction of roads, motorways, railway lines and hydrotechnical structures requires the use of aggregates of high quality, which is
Hydzik-Wiśniewska Joanna, Bednarek Łukasz   +1 more
doaj   +1 more source

Technical and environmental properties of recycled aggregates produced from concrete sludge and excavation materials

Case Studies in Construction Materials, 2023
This study presents a Re-Con Zero dry washing technology used to produce recycled aggregates from concrete sludge (RCZ) and combined as a feedstock in wet recycling excavation materials (EM) for unbound applications.
Solomon Adomako, Christian John Engelsen, Line Teigen Døssland, Tobias Danner, Rein Terje Thorstensen   +4 more
doaj   +1 more source

Die Erwartungen der Bevölkerung an Entwicklungspolitik: Ergebnisse des DEval-Meinungsmonitors Entwicklungspolitik 2021 [PDF]

, 2021
Diese DEval-Publikation fasst die Ergebnisse des DEval-Meinungsmonitors Entwicklungspolitik 2021 zusammen. Dabei wurde untersucht, welche Partnerländer die Bevölkerung als besonders unterstützenswert erachtet und an welchen sozioökonomischen und ...
Sassenhagen, Nora, Bruder, Martin, Eger, Jens, Schneider, Sebastian H.   +3 more
core   +1 more source

SPECIAL LABORATORY TESTING METHOD FOR EVALUATION PARTICLE BREAKAGE OF RAILWAY BALLAST MATERIAL

Nauka ta progres transportu, 2018
Purpose. There are special, standardized laboratory test methods to evaluate railway ballast particle breakage; they are the Los Angeles and the Micro-Deval abrasion test.
S. Fischer, A. Németh
doaj   +1 more source

Caracterización de agregados pétreos con el ensayo Micro Deval [PDF]

, 2008
En este documento se presentan los aspectos más relevantes del proceso de implementación del ensayo Micro Deval, contemplado por la Norma ASTM D 6928, “Standard test method for resistance of coarse aggregate to degradation by abrasion in the Micro-Deval ...
López P., Claudia Patricia, Campagnoli Martinez, Sandra Ximena   +1 more
core   +1 more source

Caracterización y determinación del uso del depósito aluvial ubicado en la cantera Las Lomitas, corregimiento de Zambrano, La Guajira, Colombia

Prospectiva, 2023
La cantera Las Lomitas, localizada en el corregimiento de Zambrano, municipio de San Juan del Cesar, La Guajira (Colombia), se encuentran antecedentes de empresas y particulares dedicados a la explotación y comercialización de materiales de construcción.
Marintia Siossi Parodi, Carlos Javier Orozco Suarez, DINO CARMELO MANCO JARABA, Luis Carlos Lacouture Peralta, Elías Ernesto Rojas Martínez   +4 more
doaj   +1 more source

Impact of Alkali and Alkali‐Earth Cations on Ni‐Catalyzed Dimerization of Butene

ChemCatChem, Volume 12, Issue 14, Page 3705-3711, July 21, 2020., 2020
Butene dimerization: The presence of alkali (Na+ or Li+) or alkali‐earth (Ca2+ or Mg2+) cations adjusting the acid‐base properties on amorphous silica‐alumina influences markedly the catalytic properties of supported Ni for 1‐butene dimerization. n‐Octene and methylheptene are formed selectively as primary products; dimethylhexene is a secondary ...
Andreas Ehrmaier, Laura Löbbert, Maricruz Sanchez‐Sanchez, Ricardo Bermejo‐Deval, Johannes Lercher   +4 more
wiley   +1 more source