Fly Ash-Based Stabilizer Sampling in Railway Track Bed and Determination of Young's Modulus

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F15%3A00239553" target="_blank" >RIV/68407700:21110/15:00239553 - isvavai.cz</a>

Výsledek na webu

<a href="http://potopk.com.pl/Full_text/2015_full/IM%202-2015-a3.pdf" target="_blank" >http://potopk.com.pl/Full_text/2015_full/IM%202-2015-a3.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Fly Ash-Based Stabilizer Sampling in Railway Track Bed and Determination of Young's Modulus

Popis výsledku v původním jazyce

This paper deals with the investigation of the fly ash-based stabilizer used as a layer in railway track bed. The main purpose of stabilizer is to reinforce railway track bed. The above mentioned fly ash-based stabilizer is a mixture consists of fly ash, FGD gypsum, calcium oxide and water. The laboratory tests of the fly ash-based stabilizer have started in 2000 in order to define the key physical properties and also material suitability in the field of railway substructure. For the purpose of the 1:1 scale material verification, a box device with dimensions of 990 x 800 x 2095 mm for full scale testing was designed. On the base of the laboratory tests the 330 m long trial section of railway track was stabilized at the Smiřice railway station. The experience with in situ sampling in railway track bed led to recommendation summarized in the conclusion. The layer of stabilizer, which is placed under railway ballast and crushed stone, was uncovered and the boreholes with diameter 100 mm were done. According to the difficulty of sampling it was possible to extract only a small amount of specimens for the determination of the performance and durability of the fly ash-based stabilizer. It was necessary to exclude some of sampled specimens which with high probability include predisposed surface failures that might significantly affect the average value of the young's modulus. The goal was to choose three specimens for the pressure test. Ultrasonic method and also Impulse Excitation Method were chosen as non destructive test methods for the determination of dynamic modulus of elasticity, which could denote the suitable samples for the pressure test. At the end of the paper the results of determined young's modulus and dynamic modulus of elasticity are also described. The most important findings in the comparison of non-destructive and destructive tests are discussed.

Název v anglickém jazyce

Fly Ash-Based Stabilizer Sampling in Railway Track Bed and Determination of Young's Modulus

Popis výsledku anglicky

This paper deals with the investigation of the fly ash-based stabilizer used as a layer in railway track bed. The main purpose of stabilizer is to reinforce railway track bed. The above mentioned fly ash-based stabilizer is a mixture consists of fly ash, FGD gypsum, calcium oxide and water. The laboratory tests of the fly ash-based stabilizer have started in 2000 in order to define the key physical properties and also material suitability in the field of railway substructure. For the purpose of the 1:1 scale material verification, a box device with dimensions of 990 x 800 x 2095 mm for full scale testing was designed. On the base of the laboratory tests the 330 m long trial section of railway track was stabilized at the Smiřice railway station. The experience with in situ sampling in railway track bed led to recommendation summarized in the conclusion. The layer of stabilizer, which is placed under railway ballast and crushed stone, was uncovered and the boreholes with diameter 100 mm were done. According to the difficulty of sampling it was possible to extract only a small amount of specimens for the determination of the performance and durability of the fly ash-based stabilizer. It was necessary to exclude some of sampled specimens which with high probability include predisposed surface failures that might significantly affect the average value of the young's modulus. The goal was to choose three specimens for the pressure test. Ultrasonic method and also Impulse Excitation Method were chosen as non destructive test methods for the determination of dynamic modulus of elasticity, which could denote the suitable samples for the pressure test. At the end of the paper the results of determined young's modulus and dynamic modulus of elasticity are also described. The most important findings in the comparison of non-destructive and destructive tests are discussed.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JM - Inženýrské stavitelství

OECD FORD obor

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Projekt

<a href="/cs/project/TE01020168" target="_blank" >TE01020168: Centrum pro efektivní a udržitelnou dopravní infrastrukturu (CESTI)</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Inżynieria Mineralna

ISSN

1640-4920

e-ISSN

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Svazek periodika

36

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

6

Strana od-do

11-16

Kód UT WoS článku

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EID výsledku v databázi Scopus

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