Strain rate-dependent compressive behavior and failure mechanism of cementitious syntactic foams

Halim Kerim Bas, Weihua Jin, Nikhil Gupta, Dung D. Luong

Research output: Contribution to journalArticle

Abstract

The present work was focused on studying the strain rate sensitivity of cementitious syntactic foams (CSF), which are particulate composites reinforced with hollow glass microspheres (HMG). Different density CSFs (1.31–1.74 g/cm3) with different volume fractions (20–40%) of HGMs were tested with a split-Hopkinson pressure bar setup. The true particle densities of the HGMs were in the range of 0.38–0.60 g/cm3. In addition, the macro- and micro-scale failure mechanisms were investigated with high-speed camera imaging, micro-CT scanning, and electron microscopy. The results showed that both the CSFs and the baseline material (control sample), which is the cement paste matrix of the CSFs, showed strain rate sensitivity in mechanical properties in the 102–103 s−1 strain rate range. CSFs had relatively lower strain rate sensitivity in comparison to the matrix material. In the same range of strain rate, both the CSFs and the control sample showed significant changes in their macro and micro failure mechanisms depending on their age, composition and loading rate. The level of damage at the peak load for the high strain rate was higher in comparison to the same materials tested under quasi-static loading conditions for CSFs and the cement matrix.

Original languageEnglish (US)
Pages (from-to)70-80
Number of pages11
JournalCement and Concrete Composites
Volume95
DOIs
StatePublished - Jan 1 2019

Fingerprint

Syntactics
Foams
Strain rate
Macros
Cements
High speed cameras
Ointments
Microspheres
Electron microscopy
Volume fraction
Scanning
Imaging techniques
Glass
Mechanical properties
Composite materials
Chemical analysis

Keywords

  • Cement
  • High strain rate
  • Hollow glass microsphere
  • Micro-CT analysis
  • Syntactic foam

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

Cite this

Strain rate-dependent compressive behavior and failure mechanism of cementitious syntactic foams. / Bas, Halim Kerim; Jin, Weihua; Gupta, Nikhil; Luong, Dung D.

In: Cement and Concrete Composites, Vol. 95, 01.01.2019, p. 70-80.

Research output: Contribution to journalArticle

@article{e2d865754f57402e964edbc50d147af7,
title = "Strain rate-dependent compressive behavior and failure mechanism of cementitious syntactic foams",
abstract = "The present work was focused on studying the strain rate sensitivity of cementitious syntactic foams (CSF), which are particulate composites reinforced with hollow glass microspheres (HMG). Different density CSFs (1.31–1.74 g/cm3) with different volume fractions (20–40{\%}) of HGMs were tested with a split-Hopkinson pressure bar setup. The true particle densities of the HGMs were in the range of 0.38–0.60 g/cm3. In addition, the macro- and micro-scale failure mechanisms were investigated with high-speed camera imaging, micro-CT scanning, and electron microscopy. The results showed that both the CSFs and the baseline material (control sample), which is the cement paste matrix of the CSFs, showed strain rate sensitivity in mechanical properties in the 102–103 s−1 strain rate range. CSFs had relatively lower strain rate sensitivity in comparison to the matrix material. In the same range of strain rate, both the CSFs and the control sample showed significant changes in their macro and micro failure mechanisms depending on their age, composition and loading rate. The level of damage at the peak load for the high strain rate was higher in comparison to the same materials tested under quasi-static loading conditions for CSFs and the cement matrix.",
keywords = "Cement, High strain rate, Hollow glass microsphere, Micro-CT analysis, Syntactic foam",
author = "Bas, {Halim Kerim} and Weihua Jin and Nikhil Gupta and Luong, {Dung D.}",
year = "2019",
month = "1",
day = "1",
doi = "10.1016/j.cemconcomp.2018.10.009",
language = "English (US)",
volume = "95",
pages = "70--80",
journal = "Cement and Concrete Composites",
issn = "0958-9465",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Strain rate-dependent compressive behavior and failure mechanism of cementitious syntactic foams

AU - Bas, Halim Kerim

AU - Jin, Weihua

AU - Gupta, Nikhil

AU - Luong, Dung D.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The present work was focused on studying the strain rate sensitivity of cementitious syntactic foams (CSF), which are particulate composites reinforced with hollow glass microspheres (HMG). Different density CSFs (1.31–1.74 g/cm3) with different volume fractions (20–40%) of HGMs were tested with a split-Hopkinson pressure bar setup. The true particle densities of the HGMs were in the range of 0.38–0.60 g/cm3. In addition, the macro- and micro-scale failure mechanisms were investigated with high-speed camera imaging, micro-CT scanning, and electron microscopy. The results showed that both the CSFs and the baseline material (control sample), which is the cement paste matrix of the CSFs, showed strain rate sensitivity in mechanical properties in the 102–103 s−1 strain rate range. CSFs had relatively lower strain rate sensitivity in comparison to the matrix material. In the same range of strain rate, both the CSFs and the control sample showed significant changes in their macro and micro failure mechanisms depending on their age, composition and loading rate. The level of damage at the peak load for the high strain rate was higher in comparison to the same materials tested under quasi-static loading conditions for CSFs and the cement matrix.

AB - The present work was focused on studying the strain rate sensitivity of cementitious syntactic foams (CSF), which are particulate composites reinforced with hollow glass microspheres (HMG). Different density CSFs (1.31–1.74 g/cm3) with different volume fractions (20–40%) of HGMs were tested with a split-Hopkinson pressure bar setup. The true particle densities of the HGMs were in the range of 0.38–0.60 g/cm3. In addition, the macro- and micro-scale failure mechanisms were investigated with high-speed camera imaging, micro-CT scanning, and electron microscopy. The results showed that both the CSFs and the baseline material (control sample), which is the cement paste matrix of the CSFs, showed strain rate sensitivity in mechanical properties in the 102–103 s−1 strain rate range. CSFs had relatively lower strain rate sensitivity in comparison to the matrix material. In the same range of strain rate, both the CSFs and the control sample showed significant changes in their macro and micro failure mechanisms depending on their age, composition and loading rate. The level of damage at the peak load for the high strain rate was higher in comparison to the same materials tested under quasi-static loading conditions for CSFs and the cement matrix.

KW - Cement

KW - High strain rate

KW - Hollow glass microsphere

KW - Micro-CT analysis

KW - Syntactic foam

UR - http://www.scopus.com/inward/record.url?scp=85055336724&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85055336724&partnerID=8YFLogxK

U2 - 10.1016/j.cemconcomp.2018.10.009

DO - 10.1016/j.cemconcomp.2018.10.009

M3 - Article

AN - SCOPUS:85055336724

VL - 95

SP - 70

EP - 80

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

SN - 0958-9465

ER -