Publication detail

Microstructural Analysis of Fly Ash-Based Stabilizer for Track Bed

LOJDA, V. ZIKMUND, T. SOJKA, K. KAISER, J. PROŠEK, Z. LIDMILA, M.

Original Title

Microstructural Analysis of Fly Ash-Based Stabilizer for Track Bed

Type

conference paper

Language

English

Original Abstract

This article is related to the unique application of fly ash-based stabilizer in the track bed of a railway line. In detail, it is focused on following analysis methods of samples structure and properties. The long-term observation of the stabilizer layer is based on the periodical sampling which is done once per year for the following compression strength test. Results collected over one decade showed the increasing tendency of the compression strength which is attributed to formatting the C-A-S-H gel. It is assumed it is done within structural conversion caused by the alkali activation of aluminosilicate components. This phenomenon was proved using electron microscopy. The statistical analysis of the compression strength resulted significant deviations the presence of which may be based on grains, poor stirring the mixture during placing, predisposed surfaces or micro cracks created during sampling in the railway track bed. The main outcomes of the paper are findings from non-destructive methods of Micro-CT and of electron microscopy, which were performed on specimens for the purpose of displaying their microstructure and identifying non-homogeneities of the specimens.

Keywords

Fly Ash, Track Bed, Microstructure, Microscopy, X-Ray Computed Tomography, Micro-CT.

Authors

LOJDA, V.; ZIKMUND, T.; SOJKA, K.; KAISER, J.; PROŠEK, Z.; LIDMILA, M.

Released

1. 1. 2017

ISBN

978-3-0357-1138-7

Book

Contemporary Materials and Technologies in Civil Engineering

Edition

Key Engineering Materials Vol. 731

Pages from

66

Pages to

73

Pages count

8

BibTex

@inproceedings{BUT130447,
  author="Vít {Lojda} and Tomáš {Zikmund} and Karel {Sojka} and Jozef {Kaiser} and Zdeněk {Prošek} and Martin {Lidmila}",
  title="Microstructural Analysis of Fly Ash-Based Stabilizer for Track Bed",
  booktitle="Contemporary Materials and Technologies in Civil Engineering",
  year="2017",
  series="Key Engineering Materials Vol. 731",
  pages="66--73",
  isbn="978-3-0357-1138-7"
}