Breakage test of railway ballast materials with new laboratory method
Publication Name: Periodica Polytechnica Civil Engineering
Publication Date: 2017-10-24
Volume: 61
Issue: 4
Page Range: 794-802
Description:
This paper summarizes the results of a R&D work in 2014. Five different types of andesite railway ballast material with different LARB (%) (Los Angeles abrasion) as well as MDE RB (%) (Micro-Deval abrasion) values were investigated in laboratory with pulsating test which models the real condition much better (the used parameters were determined accordance with international dynamic design method). Grain size distributions related to the five several aggregates were defined before and after pulsating tests. Particle breakages were then calculated by different method publicized in international literature. Relationships were searched between particle breakages due to laboratory test and LARB (%) as well as MDE RB (%) values of railway ballast samples. Time interval (cycle) of ballast cleaning work were attempted to compute with help of special parameters used by Hungarian and other railway companies underlined the limits of calculation method. Finally recommendations were formulated related to use of this new laboratory test method for estimation of ballast particle breakage.
Open Access: Yes
DOI: 10.3311/PPci.8549