Effects of blast furnace slag and steel fiber on the impact resistance of railway prestressed concrete sleepers

Doo Yeol Yoo, Jin Young Lee, Hyun Oh Shin, Jun Mo Yang, Young Soo Yoon

Research output: Contribution to journalArticle

Abstract

This study aims to investigate the effects of ground granulated blast furnace slag (GGBFS) and steel fibers on the flexural behavior of railway prestressed concrete (PSC) sleepers under static and impact loads. For this, two types of railway PSC sleepers with 14 or 16 prestressing strands were fabricated, and two different hammers with weights of 400 and 500 kg dropped at a height of 2 m for providing two potential energies of 7.85 and 9.81 kJ for the impact resistance. The structural integrity of the sleepers after impact damage was examined by evaluating their residual flexural performance. Test results indicated that the addition of 0.75 vol% hooked steel fibers was effective in improving the flexural performance of the sleepers at both static and impact loads, while the inclusion of GGBFS led to an improvement in the static flexural performance only. Based on our analysis of cracking behavior, enhancements in static and impact resistance of the sleepers with steel fibers were caused by the limited formation of cracks and a decrease in maximum crack width. Higher flexural strengths of all tested sleepers were also obtained under the impact load than under the static load, and the increase was higher for higher potential energies because of the strain-rate effect. The enhanced residual capacity (i.e., higher strength and stiffness) of the PSC sleepers was obtained by including steel fibers and increasing the number of strands. In addition, slightly lower dynamic load factors were observed for the fiber-reinforced PSC sleepers than those without fibers, meaning that the sleepers with steel fibers were less sensitive to the strain-rate than their counterparts without fibers.

Original languageEnglish
Pages (from-to)151-164
Number of pages14
JournalCement and Concrete Composites
Volume99
DOIs
Publication statusPublished - 2019 May 1

Fingerprint

Impact resistance
Steel fibers
Prestressed concrete
Slags
Potential energy
Fibers
Strain rate
Cracks
Prestressing
Hammers
Structural integrity
Dynamic loads
Bending strength
Reinforced concrete
Stiffness

Keywords

  • GGBFS
  • Impact resistance
  • Railway PSC sleeper
  • Residual capacity
  • Steel fiber
  • Strain-rate

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

Cite this

Effects of blast furnace slag and steel fiber on the impact resistance of railway prestressed concrete sleepers. / Yoo, Doo Yeol; Lee, Jin Young; Shin, Hyun Oh; Yang, Jun Mo; Yoon, Young Soo.

In: Cement and Concrete Composites, Vol. 99, 01.05.2019, p. 151-164.

Research output: Contribution to journalArticle

@article{4179b517857d4c8997c86db15b2c803a,
title = "Effects of blast furnace slag and steel fiber on the impact resistance of railway prestressed concrete sleepers",
abstract = "This study aims to investigate the effects of ground granulated blast furnace slag (GGBFS) and steel fibers on the flexural behavior of railway prestressed concrete (PSC) sleepers under static and impact loads. For this, two types of railway PSC sleepers with 14 or 16 prestressing strands were fabricated, and two different hammers with weights of 400 and 500 kg dropped at a height of 2 m for providing two potential energies of 7.85 and 9.81 kJ for the impact resistance. The structural integrity of the sleepers after impact damage was examined by evaluating their residual flexural performance. Test results indicated that the addition of 0.75 vol{\%} hooked steel fibers was effective in improving the flexural performance of the sleepers at both static and impact loads, while the inclusion of GGBFS led to an improvement in the static flexural performance only. Based on our analysis of cracking behavior, enhancements in static and impact resistance of the sleepers with steel fibers were caused by the limited formation of cracks and a decrease in maximum crack width. Higher flexural strengths of all tested sleepers were also obtained under the impact load than under the static load, and the increase was higher for higher potential energies because of the strain-rate effect. The enhanced residual capacity (i.e., higher strength and stiffness) of the PSC sleepers was obtained by including steel fibers and increasing the number of strands. In addition, slightly lower dynamic load factors were observed for the fiber-reinforced PSC sleepers than those without fibers, meaning that the sleepers with steel fibers were less sensitive to the strain-rate than their counterparts without fibers.",
keywords = "GGBFS, Impact resistance, Railway PSC sleeper, Residual capacity, Steel fiber, Strain-rate",
author = "Yoo, {Doo Yeol} and Lee, {Jin Young} and Shin, {Hyun Oh} and Yang, {Jun Mo} and Yoon, {Young Soo}",
year = "2019",
month = "5",
day = "1",
doi = "10.1016/j.cemconcomp.2019.03.015",
language = "English",
volume = "99",
pages = "151--164",
journal = "Cement and Concrete Composites",
issn = "0958-9465",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Effects of blast furnace slag and steel fiber on the impact resistance of railway prestressed concrete sleepers

AU - Yoo, Doo Yeol

AU - Lee, Jin Young

AU - Shin, Hyun Oh

AU - Yang, Jun Mo

AU - Yoon, Young Soo

PY - 2019/5/1

Y1 - 2019/5/1

N2 - This study aims to investigate the effects of ground granulated blast furnace slag (GGBFS) and steel fibers on the flexural behavior of railway prestressed concrete (PSC) sleepers under static and impact loads. For this, two types of railway PSC sleepers with 14 or 16 prestressing strands were fabricated, and two different hammers with weights of 400 and 500 kg dropped at a height of 2 m for providing two potential energies of 7.85 and 9.81 kJ for the impact resistance. The structural integrity of the sleepers after impact damage was examined by evaluating their residual flexural performance. Test results indicated that the addition of 0.75 vol% hooked steel fibers was effective in improving the flexural performance of the sleepers at both static and impact loads, while the inclusion of GGBFS led to an improvement in the static flexural performance only. Based on our analysis of cracking behavior, enhancements in static and impact resistance of the sleepers with steel fibers were caused by the limited formation of cracks and a decrease in maximum crack width. Higher flexural strengths of all tested sleepers were also obtained under the impact load than under the static load, and the increase was higher for higher potential energies because of the strain-rate effect. The enhanced residual capacity (i.e., higher strength and stiffness) of the PSC sleepers was obtained by including steel fibers and increasing the number of strands. In addition, slightly lower dynamic load factors were observed for the fiber-reinforced PSC sleepers than those without fibers, meaning that the sleepers with steel fibers were less sensitive to the strain-rate than their counterparts without fibers.

AB - This study aims to investigate the effects of ground granulated blast furnace slag (GGBFS) and steel fibers on the flexural behavior of railway prestressed concrete (PSC) sleepers under static and impact loads. For this, two types of railway PSC sleepers with 14 or 16 prestressing strands were fabricated, and two different hammers with weights of 400 and 500 kg dropped at a height of 2 m for providing two potential energies of 7.85 and 9.81 kJ for the impact resistance. The structural integrity of the sleepers after impact damage was examined by evaluating their residual flexural performance. Test results indicated that the addition of 0.75 vol% hooked steel fibers was effective in improving the flexural performance of the sleepers at both static and impact loads, while the inclusion of GGBFS led to an improvement in the static flexural performance only. Based on our analysis of cracking behavior, enhancements in static and impact resistance of the sleepers with steel fibers were caused by the limited formation of cracks and a decrease in maximum crack width. Higher flexural strengths of all tested sleepers were also obtained under the impact load than under the static load, and the increase was higher for higher potential energies because of the strain-rate effect. The enhanced residual capacity (i.e., higher strength and stiffness) of the PSC sleepers was obtained by including steel fibers and increasing the number of strands. In addition, slightly lower dynamic load factors were observed for the fiber-reinforced PSC sleepers than those without fibers, meaning that the sleepers with steel fibers were less sensitive to the strain-rate than their counterparts without fibers.

KW - GGBFS

KW - Impact resistance

KW - Railway PSC sleeper

KW - Residual capacity

KW - Steel fiber

KW - Strain-rate

UR - http://www.scopus.com/inward/record.url?scp=85063321771&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063321771&partnerID=8YFLogxK

U2 - 10.1016/j.cemconcomp.2019.03.015

DO - 10.1016/j.cemconcomp.2019.03.015

M3 - Article

AN - SCOPUS:85063321771

VL - 99

SP - 151

EP - 164

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

SN - 0958-9465

ER -